WO2015182665A1 - リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 - Google Patents
リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 Download PDFInfo
- Publication number
- WO2015182665A1 WO2015182665A1 PCT/JP2015/065269 JP2015065269W WO2015182665A1 WO 2015182665 A1 WO2015182665 A1 WO 2015182665A1 JP 2015065269 W JP2015065269 W JP 2015065269W WO 2015182665 A1 WO2015182665 A1 WO 2015182665A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lithium
- positive electrode
- active material
- lithium secondary
- secondary battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Complex oxides containing nickel and at least one other metal element
- C01G53/42—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2
- C01G53/44—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese
- C01G53/50—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/76—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by a space-group or by other symmetry indications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a positive electrode active material for a lithium secondary battery, a positive electrode for a lithium secondary battery, and a lithium secondary battery.
- This application claims priority based on Japanese Patent Application No. 2014-111713 filed in Japan on May 29, 2014 and Japanese Patent Application No. 2014-262692 filed in Japan on December 25, 2014. The contents are incorporated herein.
- the lithium-containing composite metal oxide is used as a positive electrode active material for a lithium secondary battery.
- Lithium secondary batteries have already been put into practical use not only for small power sources for mobile phones and laptop computers, but also for medium and large power sources for automobiles and power storage.
- Patent Document 1 discloses a lithium nickel manganese cobalt-based composite oxide having a primary particle diameter of 1.8 ⁇ m and an amount of lithium carbonate that is residual alkali on the particle surface measured by neutralization titration.
- the positive electrode active material for lithium secondary batteries which is 0.39 mass% is disclosed.
- a lithium secondary battery obtained by using the above-described conventional lithium-containing composite metal oxide as a positive electrode active material has not been sufficient for automobile applications that require high charge / discharge cycle characteristics and high discharge capacity. .
- This invention is made
- Another object of the present invention is to provide a positive electrode and a lithium secondary battery using such a positive electrode active material for a lithium secondary battery.
- one embodiment of the present invention is a positive electrode active material for a lithium secondary battery including at least nickel, cobalt, and manganese and having a layered structure, and the following requirements (1) to (3) are satisfied:
- a positive electrode active material for a lithium secondary battery Provided is a positive electrode active material for a lithium secondary battery.
- Primary particle diameter is 0.1 ⁇ m or more and 1 ⁇ m or less, 50% cumulative volume particle size D 50 is 1 ⁇ m or more and 10 ⁇ m or less
- Ratio D of 90% cumulative volume particle size D 90 and 10% cumulative volume particle size D 10 90 / D 10 is 2 to 6
- a crystallite size ⁇ ( ⁇ ) and a BET specific surface area ⁇ (m 2 / m) at a peak in the range of 2 ⁇ 18.7 ⁇ 1 ° in powder X-ray diffraction measurement using CuK ⁇ ray.
- the value of the relational expression ⁇ / ⁇ / 1000 with respect to g) is preferably 0.5 or more and 2.3 or less.
- the BET specific surface area is preferably 0.1 m 2 / g or more and 2 m 2 / g or less.
- the sum of the amount of lithium carbonate and lithium hydroxide contained in the residual alkali on the particle surface measured by neutralization titration is preferably 0.2% by mass or more and 1.5% by mass or less. .
- the relational expression (D 90 -D 10 ) / D 50 of 10% cumulative volume particle size D 10 , 50% cumulative volume particle size D 50 and 90% cumulative volume particle size D 90 is 1.00 or more. 2.20 or less is preferable.
- the powder conductivity at a pressure of 6.37 kN / cm 2 is preferably 1 ⁇ 10 ⁇ 3 S / cm or more and 1 ⁇ 10 ⁇ 1 S / cm or less.
- the layered structure is preferably represented by the following composition formula (I).
- Li a Ni 1-xyz Mn x Co y M z O 2 (I) (Where a is 0.9 ⁇ a ⁇ 1.2, x is 0 ⁇ x ⁇ 0.4, y is 0 ⁇ y ⁇ 0.4, z is 0 ⁇ z ⁇ 0.1, 1 ⁇ x ⁇ yz is 0.5 ⁇ 1-xyz ⁇ 0.65, and M is one or more metals selected from Mg, Al, and Zr.)
- one embodiment of the present invention provides a positive electrode having the above-described positive electrode active material for a lithium secondary battery.
- one embodiment of the present invention provides a lithium secondary battery including a negative electrode and the positive electrode described above.
- a positive electrode active material for a lithium secondary battery having high cycle characteristics and high discharge capacity can be provided.
- the positive electrode and lithium secondary battery using such a positive electrode active material for lithium secondary batteries can be provided.
- the positive electrode active material for a lithium secondary battery of the present invention is particularly useful for a lithium secondary battery suitable for in-vehicle use.
- FIG. 1A is a schematic configuration diagram illustrating an example of an electrode group used in a lithium ion secondary battery.
- FIG. 1B is a schematic configuration diagram illustrating an example of a lithium ion secondary battery using the electrode group illustrated in FIG. 1A.
- the positive electrode active material for a lithium secondary battery of the present embodiment contains at least nickel, cobalt, and manganese, and has a layered structure (hereinafter simply referred to as “lithium-containing composite metal oxide”). And satisfies the following requirements (1) to (3).
- Primary particle diameter is 0.1 ⁇ m or more and 1 ⁇ m or less, 50% cumulative volume particle size D 50 is 1 ⁇ m or more and 10 ⁇ m or less (2)
- Ratio D of 90% cumulative volume particle size D 90 and 10% cumulative volume particle size D 10 90 / D 10 is 2 to 6 (3) lithium carbonate content in the remaining alkali of measured particle surfaces by neutralization titration less than 0.8 mass% to 0.1 mass%, it will be described in order.
- the layered structure is preferably a layered structure represented by the following composition formula (I).
- Li a Ni 1-xyz Mn x Co y M z O 2 (I) (Where a is 0.9 ⁇ a ⁇ 1.2, x is 0 ⁇ x ⁇ 0.4, y is 0 ⁇ y ⁇ 0.4, z is 0 ⁇ z ⁇ 0.1, 1 ⁇ x ⁇ yz is 0.5 ⁇ 1-xyz ⁇ 0.65, and M is one or more metals selected from Mg, Al, and Zr).
- a in the composition formula (I) is preferably 0.95 or more and 0.98 or more in order to obtain a lithium secondary battery with higher capacity. More preferably, it is more preferably 1.00 or more. In order to obtain a lithium secondary battery that increases the discharge capacity at a high current rate, a is preferably 1.18 or less, more preferably 1.15 or less, and 1.13 or less. Further preferred.
- the upper limit value and lower limit value of a can be arbitrarily combined.
- x in a composition formula (I) is 0.05 or more, It is more preferable that it is 0.10 or more, It is 0.15 or more Is more preferable. Further, x is preferably 0.35 or less, more preferably 0.30 or less, and 0.28 or less in order to enhance storage characteristics in a high temperature (for example, 60 ° C.) environment. Further preferred.
- the upper limit value and the lower limit value of x can be arbitrarily combined.
- y in the composition formula (I) is preferably 0.05 or more, more preferably 0.10 or more, and 0.15 or more. More preferably it is. In order to improve cycle characteristics, y is preferably 0.3 or less, more preferably 0.25 or less, and further preferably 0.22 or less.
- the upper limit value and the lower limit value of y can be arbitrarily combined.
- M in the composition formula (I) is one or more metals selected from Mg, Al, and Zr.
- Al and / or Zr are preferable.
- Mg and / or Al are preferable in order to obtain a lithium battery that further enhances thermal stability.
- z in the composition formula (I) is more than 0 and preferably 0.08 or less, more preferably 0.005 or more and 0.05 or less, and 0.008 or more. More preferably, it is 0.02 or less.
- 1-xyz in the composition formula (I) is preferably more than 0.50, more preferably 0.53 or more, and 0.55 or more. More preferably. In order to improve cycle characteristics, 1-xyz is preferably 0.64 or less, more preferably 0.63 or less, and further preferably 0.62 or less. The upper limit value and the lower limit value of 1-xyz can be arbitrarily combined.
- the crystal structure of the lithium-containing composite metal oxide of the present embodiment is a layered structure, and more preferably a hexagonal crystal structure or a monoclinic crystal structure.
- the hexagonal crystal structures are P3, P3 1 , P3 2 , R3, P-3, R-3, P312, P321, P3 1 12, P3 1 21, P3 2 12, P3 2 21, R32, P3m1, P31m, P3c1, P31c, R3m, R3c, P-31m, P-31c, P-3m1, P-3c1, R-3m, R-3c, P6, P6 1 , P6 5 , P6 2 , P6 4 , P6 3 , P-6, P6 / m, P6 3 / m, P622, P6 1 22, P6 5 22, P6 2 22, P6 4 22, P6 3 22, P6 mm, P6 cc, P6 3 cm, P6 3 mc, P- It belongs to any one space group selected from the group consisting of 6m2, P-6c2, P-62m, P-62c, P6 / mmm, P6 / mcc, P6 3 / mcm, P-
- the monoclinic crystal structure is P2, P2 1 , C2, Pm, Pc, Cm, Cc, P2 / m, P2 1 / m, C2 / m, P2 / c, P2 1 / c, C2 / It belongs to any one space group selected from the group consisting of c.
- the crystal structure of the positive electrode active material is attributed to the hexagonal crystal structure belonging to the space group R-3m, or C2 / m.
- a monoclinic crystal structure is particularly preferable.
- the space group of the lithium-containing composite metal oxide of the present embodiment can be confirmed as follows.
- a powder X-ray diffraction measurement is performed with CuK ⁇ as a radiation source and a diffraction angle 2 ⁇ measurement range of 10 ° to 90 °, and then Rietveld analysis is performed based on the results.
- the crystal structure of the lithium-containing composite metal oxide and the space group in this crystal structure are determined.
- Rietveld analysis is a technique for analyzing the crystal structure of a material using diffraction peak data (diffraction peak intensity, diffraction angle 2 ⁇ ) in powder X-ray diffraction measurement of the material, and is a conventionally used technique. (See, for example, “Practice of Powder X-ray Analysis—Introduction to Rietveld Method”, published on February 10, 2002, edited by the Japan Society for Analytical Chemistry X-ray Analysis Research Meeting).
- the particle form of the positive electrode active material for a lithium secondary battery of the present embodiment is a secondary particle formed by agglomeration of primary particles, or a mixture of primary particles and secondary particles formed by agglomeration of primary particles. It is.
- the primary particle diameter of the positive electrode active material is 0.1 ⁇ m or more and 1 ⁇ m or less.
- the primary particle size is preferably 0.2 ⁇ m or more and 0.9 ⁇ m or less, and more preferably 0.25 ⁇ m or more and 0.8 ⁇ m or less, in the sense of obtaining a lithium secondary battery that further increases the initial Coulomb efficiency.
- the average particle diameter of the primary particles can be measured by observing with an SEM.
- the secondary particle diameter of the positive electrode active material is 1 ⁇ m or more and 10 ⁇ m or less.
- the secondary particle diameter is preferably 9 ⁇ m or less, more preferably 8 ⁇ m or less, and even more preferably 7 ⁇ m or less in the sense of obtaining a lithium battery that enhances the discharge capacity in a low temperature (for example, 0 ° C.) environment.
- the secondary particle diameter is preferably 2 ⁇ m or more, more preferably 3 ⁇ m or more, and further preferably 4 ⁇ m or more.
- the “secondary particle diameter” of the positive electrode active material refers to a 50% cumulative volume particle size D 50 measured by the following method (laser diffraction scattering method).
- 0.1 g of the positive electrode active material powder is put into 50 ml of a 0.2 mass% sodium hexametaphosphate aqueous solution to obtain a dispersion in which the powder is dispersed.
- the particle size distribution of the obtained dispersion is measured using a Malvern Mastersizer 2000 (laser diffraction / scattering particle size distribution measuring device) to obtain a volume-based cumulative particle size distribution curve.
- the value of the particle size as seen from the microparticles side at 50% accumulation is 50% cumulative volume particle size D 50, and that the secondary particle size of the positive electrode active material .
- the value of the particle diameter viewed from the fine particle side at the time of 10% accumulation is 10% cumulative volume particle size D 10
- the value of the particle diameter viewed from the fine particle side at the time of 90% accumulation is 90% cumulative volume particle size D 90 . is there.
- Cathode active material for a lithium secondary battery of the present embodiment is 90% cumulative volume particle size D 90 and the ratio D 90 / D 10 of 10% cumulative volume particle size D 10 of 2 to 6.
- D 90 / D 10 is preferably 2.2 or more, and more preferably 2.4 or more.
- D 90 / D 10 is preferably 5.7 or less, and more preferably 5.5 or less, in order to obtain a lithium battery that increases the discharge capacity at a higher current rate.
- the D 90 / D 10 is at a low value, indicating that the width of the size distribution is narrow, the D 90 / D 10 is at a high value, indicating that the width of the particle size distribution is wide.
- a relational expression of 10% cumulative volume particle size D 10 , 50% cumulative volume particle size D 50 and 90% cumulative volume particle size D 90 (in the sense of obtaining a lithium battery with higher cycle characteristics) ( D 90 -D 10 ) / D 50 is preferably 1.00 or more and 2.20 or less.
- (D 90 -D 10 ) / D 50 is preferably 1.10 or more and 2.15 or less, more preferably 1.20 or more and 2.10 or less.
- the crystallite size in (sometimes referred to as A) is preferably 600 mm or more, more preferably 650 mm or more, and further preferably 700 mm or more.
- the crystallite size at peak A is preferably 1400 ⁇ or less, more preferably 1300 ⁇ or less, and even more preferably 1250 ⁇ or less.
- the upper limit value and lower limit value of peak A can be arbitrarily combined.
- the upper limit value and lower limit value of peak B can be arbitrarily combined.
- the value obtained by dividing the crystallite size at peak A by the crystallite size at peak B is 0.8 or more and 2.8 or less in order to obtain a lithium battery that enhances storage characteristics in a high temperature (for example, 60 ° C.) environment. It is preferable that it is 1.2 or more and 2.2 or less.
- the crystallite size at peak A and the crystallite size at peak B of the positive electrode active material can be confirmed as follows.
- BET specific surface area of the positive electrode active material of the present embodiment is preferably less 0.1 m 2 / g or more 2.0 m 2 / g.
- the battery resistance that is, the diffusion resistance of lithium ions and electrons
- the BET specific surface area of the lithium-containing composite metal oxide is preferably 0.3 m 2 / g or more, and more preferably 0.5 m 2 / g or more.
- the BET specific surface area is preferably 1.8 m 2 / g or less, and more preferably 1.5 m 2 / g or less.
- the upper limit value and the lower limit value of the BET specific surface area can be arbitrarily combined.
- the value of ( ⁇ / ⁇ ) / 1000 is preferably in the range of 0.5 or more and 2.3 or less.
- the cycle characteristics of the lithium secondary battery obtained by these can be improved and the discharge capacity can be increased.
- ( ⁇ / ⁇ ) / 1000 is preferably 0.6 or more and 2.1 or less, preferably 0.7 or more and 2.1 or less, and preferably 0.7 or more and 1.9 or less in the sense of further enhancing the above-described effects. 0.8 to 1.9 is more preferable.
- the amount of lithium carbonate contained in the residual alkali on the particle surface measured by neutralization titration of the positive electrode active material of the present embodiment is 0.1% by mass or more and 0.8% by mass or less. It is preferably 0.2% by mass or more and more preferably 0.3% by mass or more in terms of obtaining a lithium battery that enhances cycle characteristics. Further, from the viewpoint of suppressing the swelling of the battery during the charge / discharge cycle, the amount of lithium carbonate contained in the residual alkali on the particle surface measured by neutralization titration is preferably 0.78% by mass or less, and 0.77 It is more preferable that the amount is not more than mass%.
- the sum of the amount of lithium carbonate and the amount of lithium hydroxide contained in the residual alkali on the particle surface measured by neutralization titration is 0.2 mass in order to obtain a lithium battery with improved cycle characteristics. % Or more, preferably 0.25% by mass or more, and more preferably 0.3% by mass or more. Further, in order to improve the stability of the electrode paste described later, the sum of the lithium carbonate amount and the lithium hydroxide amount contained in the residual alkali on the particle surface measured by neutralization titration is 1.5% by mass or less. Preferably, it is 1.4% by mass or less, and more preferably 1.3% by mass or less.
- the upper limit value and lower limit value of the sum of the lithium carbonate amount and the lithium hydroxide amount can be arbitrarily combined.
- the powder conductivity at the time of pressing 6.37 kN / cm 2 is preferably 1 ⁇ 10 ⁇ 3 S / cm or more, More preferably, it is 5 ⁇ 10 ⁇ 3 S / cm or more. In order to obtain a lithium battery with improved cycle characteristics, it is preferably 1 ⁇ 10 ⁇ 1 S / cm or less, and more preferably 8 ⁇ 10 ⁇ 2 S / cm or less. 6.37 kN / cm 2
- the upper limit value and the lower limit value of the powder conductivity at the time of pressurization can be arbitrarily combined.
- the positive electrode active material for a lithium secondary battery of the present invention has high cycle characteristics and a high discharge capacity.
- the reason is guessed as follows.
- the lithium-containing composite metal oxide has a predetermined particle diameter, the surface area increases, so that the contact area between the particles increases, so that the resistance can be suppressed, and the high discharge capacity. Can be achieved.
- the present invention by increasing the BET specific surface area, voids are generated inside the particles, and the voids inside the particles alleviate the concentration of stress generated at the grain boundaries between the primary particles due to the volume change during charge / discharge. Therefore, it is considered that high cycle characteristics can be achieved. Further, by reducing the crystallite size, it is possible to reduce the volume change at the time of charging / discharging, so that it is considered that high cycle characteristics can be achieved.
- a metal other than lithium that is, an essential metal of Ni, Co, and Mn, and one or more arbitrary metals of Mg, Al, and Zr are used. It is preferable to prepare a metal composite compound containing the metal composite compound and to fire the metal composite compound with an appropriate lithium salt.
- a metal complex compound a metal complex hydroxide or a metal complex oxide is preferable.
- the metal complex compound can be produced by a generally known batch method or coprecipitation method.
- the manufacturing method will be described in detail by taking a metal composite hydroxide containing nickel, cobalt, and manganese as an example.
- a nickel salt solution, a cobalt salt solution, a manganese salt solution, and a complexing agent are reacted by a coprecipitation method, in particular, a continuous method described in JP-A-2002-201028, and Ni s Co t Mn u (OH) 2
- nickel salt which is the solute of the said nickel salt solution For example, any one of nickel sulfate, nickel nitrate, nickel chloride, and nickel acetate can be used.
- cobalt salt that is a solute of the cobalt salt solution for example, any one of cobalt sulfate, cobalt nitrate, and cobalt chloride can be used.
- manganese salt that is a solute of the manganese salt solution for example, any one of manganese sulfate, manganese nitrate, and manganese chloride can be used.
- the above metal salt is used in a proportion corresponding to the composition ratio of Ni s Co t Mn u (OH) 2 .
- water is used as a solvent.
- the complexing agent is capable of forming a complex with nickel, cobalt, and manganese ions in an aqueous solution.
- an ammonium ion supplier (ammonium sulfate, ammonium chloride, ammonium carbonate, ammonium fluoride, etc.), hydrazine, Examples include ethylenediaminetetraacetic acid, nitrilotriacetic acid, uracil diacetic acid, and glycine.
- an alkali metal hydroxide for example, sodium hydroxide or potassium hydroxide
- an alkali metal hydroxide for example, sodium hydroxide or potassium hydroxide
- the nickel salt solution, cobalt salt solution, and other manganese salt solution is supplied continuously complexing agent to the reaction vessel, nickel, cobalt, and manganese to react, Ni s Co t Mn u ( OH) 2 Is manufactured.
- the temperature of the reaction vessel is controlled within a range of, for example, 10 ° C. or more and 60 ° C. or less, preferably 20 to 60 ° C.
- the substance in the reaction vessel is appropriately stirred.
- the reaction tank may be of a type that allows the formed reaction precipitate to overflow for separation.
- the obtained reaction precipitate is washed with water and then dried to isolate nickel cobalt manganese hydroxide as a nickel cobalt manganese composite compound. Moreover, you may wash
- nickel cobalt manganese composite hydroxide is manufactured, but nickel cobalt manganese composite oxide may be prepared.
- the primary particle size of the lithium-containing composite metal oxide finally obtained in the following steps by appropriately controlling the concentration of metal salt to be supplied to the reaction tank, the stirring speed, the reaction temperature, the reaction pH, the firing conditions described later, etc.
- Various physical properties such as secondary particle diameter, crystallite size, and BET specific surface area can be controlled.
- bubbling with various gases for example, an inert gas such as nitrogen, argon, carbon dioxide, air, oxygen, etc. may be used in combination with the above-described control of the conditions. Good. Since the reaction conditions depend on the size of the reaction tank to be used and the like, the reaction conditions may be optimized while monitoring various physical properties of the finally obtained lithium composite oxide.
- the metal composite oxide or hydroxide is dried and then mixed with a lithium salt.
- the drying conditions are not particularly limited.
- the metal composite oxide or hydroxide is not oxidized / reduced (oxide ⁇ oxide, hydroxide ⁇ hydroxide), and the metal composite hydroxide is oxidized. Any of the conditions (hydroxide ⁇ oxide) and the conditions under which the metal composite oxide is reduced (oxide ⁇ hydroxide) may be used.
- an inert gas such as nitrogen, helium and argon may be used.
- oxygen or air is used in an atmosphere. Good.
- a reducing agent such as hydrazine or sodium sulfite may be used in an inert gas atmosphere.
- the lithium salt any one of lithium carbonate, lithium nitrate, lithium acetate, lithium hydroxide, lithium hydroxide hydrate, lithium oxide, or a mixture of two or more can be used.
- Classification may be appropriately performed after the metal composite oxide or hydroxide is dried.
- the above lithium salt and metal composite metal hydroxide are used in consideration of the composition ratio of the final object.
- a lithium-nickel cobalt manganese composite oxide is obtained by firing a mixture of a nickel cobalt manganese composite metal hydroxide and a lithium salt. For the firing, dry air, an oxygen atmosphere, an inert atmosphere, or the like is used according to a desired composition, and a plurality of heating steps are performed if necessary.
- the firing temperature of the metal composite oxide or hydroxide and a lithium compound such as lithium hydroxide or lithium carbonate is not particularly limited, but is preferably 800 ° C to 1100 ° C, more preferably 810 ° C to 1000 ° C. It is 820 degreeC or more and 900 degrees C or less especially preferably.
- the firing temperature is lower than 800 ° C., the problem that the energy density (discharge capacity) and the high rate discharge performance are lowered tends to occur. In a region below this, there may be a structural factor that hinders the movement of Li.
- the firing temperature is preferably 5 to 50 hours. When the firing time exceeds 50 hours, the battery performance tends to be substantially inferior due to the volatilization of Li. If the firing time is less than 5 hours, the crystal development is poor and the battery performance tends to be poor.
- the temperature for such preliminary firing is preferably in the range of 300 to 800 ° C. for 1 to 10 hours. By performing the preliminary firing, the firing time may be shortened.
- the lithium-containing composite metal oxide obtained by firing is appropriately classified after pulverization, and is used as a positive electrode active material applicable to a lithium secondary battery.
- Lithium secondary battery Next, while explaining the configuration of the lithium secondary battery, a positive electrode using the lithium-containing composite metal oxide of the present embodiment as a positive electrode active material of the lithium secondary battery, and a lithium secondary battery having the positive electrode will be described.
- An example of the lithium secondary battery of the present embodiment includes a positive electrode and a negative electrode, a separator sandwiched between the positive electrode and the negative electrode, and an electrolyte solution disposed between the positive electrode and the negative electrode.
- FIG. 1A and 1B are schematic views showing an example of an electrode group used in the lithium secondary battery of the present embodiment and a lithium secondary battery using the electrode group.
- the cylindrical lithium secondary battery 10 of this embodiment is manufactured as follows.
- a pair of separators 1 having a strip shape, a strip-like positive electrode 2 having a positive electrode lead 21 at one end, and a strip-like negative electrode 3 having a negative electrode lead 31 at one end, a separator 1, a positive electrode 2, and a separator 1 and negative electrode 3 are laminated in this order and wound to form electrode group 4.
- the lithium secondary battery 10 can be manufactured by sealing the upper part of the battery can 5 with the top insulator 7 and the sealing body 8.
- a columnar shape in which the cross-sectional shape when the electrode group 4 is cut in a direction perpendicular to the winding axis is a circle, an ellipse, a rectangle, or a rectangle with rounded corners. Can be mentioned.
- a shape of the lithium secondary battery having such an electrode group 4 a shape defined by IEC 60086 or JIS C 8500 which is a standard for a battery defined by the International Electrotechnical Commission (IEC) can be adopted. .
- IEC 60086 or JIS C 8500 which is a standard for a battery defined by the International Electrotechnical Commission (IEC)
- cylindrical shape, square shape, etc. can be mentioned.
- the lithium secondary battery is not limited to the above-described wound type configuration, and may have a stacked type configuration in which a stacked structure of a positive electrode, a separator, a negative electrode and a separator is repeatedly stacked.
- Examples of the stacked lithium secondary battery include so-called coin-type batteries, button-type batteries, and paper-type (or sheet-type) batteries.
- the positive electrode of the present embodiment can be produced by first adjusting a positive electrode mixture containing a positive electrode active material, a conductive material and a binder, and supporting the positive electrode mixture on a positive electrode current collector.
- a carbon material As the conductive material included in the positive electrode of the present embodiment, a carbon material can be used.
- the carbon material include graphite powder, carbon black (for example, acetylene black), and a fibrous carbon material. Since carbon black is fine and has a large surface area, adding a small amount to the positive electrode mixture can improve the conductivity inside the positive electrode and improve the charge / discharge efficiency and output characteristics. Both the binding force between the positive electrode mixture and the positive electrode current collector and the binding force inside the positive electrode mixture are reduced, which causes an increase in internal resistance.
- the proportion of the conductive material in the positive electrode mixture is preferably 5 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the positive electrode active material.
- a fibrous carbon material such as graphitized carbon fiber or carbon nanotube is used as the conductive material, this ratio can be lowered.
- thermoplastic resin As the binder included in the positive electrode of the present embodiment, a thermoplastic resin can be used.
- the thermoplastic resin include polyvinylidene fluoride (hereinafter sometimes referred to as PVdF), polytetrafluoroethylene (hereinafter sometimes referred to as PTFE), tetrafluoroethylene, hexafluoropropylene, and vinylidene fluoride.
- fluororesins such as copolymers, propylene hexafluoride / vinylidene fluoride copolymers, tetrafluoroethylene / perfluorovinyl ether copolymers; polyolefin resins such as polyethylene and polypropylene.
- thermoplastic resins may be used as a mixture of two or more.
- a fluororesin and a polyolefin resin as a binder, the ratio of the fluororesin to the whole positive electrode mixture is 1% by mass or more and 10% by mass or less, and the ratio of the polyolefin resin is 0.1% by mass or more and 2% by mass or less.
- a band-shaped member made of a metal material such as Al, Ni, and stainless steel can be used as the positive electrode current collector included in the positive electrode of the present embodiment.
- a material that is made of Al and formed into a thin film is preferable because it is easy to process and inexpensive.
- Examples of the method of supporting the positive electrode mixture on the positive electrode current collector include a method of pressure-molding the positive electrode mixture on the positive electrode current collector. Also, the positive electrode mixture is made into a paste using an organic solvent, and the resulting positive electrode mixture paste is applied to at least one surface side of the positive electrode current collector, dried, pressed and fixed, whereby the positive electrode current collector is bonded to the positive electrode current collector. A mixture may be supported.
- usable organic solvents include amine solvents such as N, N-dimethylaminopropylamine and diethylenetriamine; ether solvents such as tetrahydrofuran; ketone solvents such as methyl ethyl ketone; methyl acetate And amide solvents such as dimethylacetamide and N-methyl-2-pyrrolidone (hereinafter sometimes referred to as NMP).
- amine solvents such as N, N-dimethylaminopropylamine and diethylenetriamine
- ether solvents such as tetrahydrofuran
- ketone solvents such as methyl ethyl ketone
- amide solvents such as dimethylacetamide and N-methyl-2-pyrrolidone (hereinafter sometimes referred to as NMP).
- Examples of the method of applying the positive electrode mixture paste to the positive electrode current collector include a slit die coating method, a screen coating method, a curtain coating method, a knife coating method, a gravure coating method, and an electrostatic spray method.
- a positive electrode can be manufactured by the method mentioned above.
- the negative electrode included in the lithium secondary battery of this embodiment is only required to be able to dope and dedope lithium ions at a lower potential than the positive electrode, and the negative electrode mixture containing the negative electrode active material is supported on the negative electrode current collector. And an electrode made of a negative electrode active material alone.
- Negative electrode active material examples of the negative electrode active material possessed by the negative electrode include carbon materials, chalcogen compounds (oxides, sulfides, etc.), nitrides, metals, and alloys that can be doped and dedoped with lithium ions at a lower potential than the positive electrode. It is done.
- Examples of carbon materials that can be used as the negative electrode active material include graphites such as natural graphite and artificial graphite, cokes, carbon black, pyrolytic carbons, carbon fibers, and organic polymer compound fired bodies.
- the oxide can be used as an anode active material, (wherein, x represents a positive real number) SiO 2, SiO, etc. formula SiO x oxides of silicon represented by; TiO 2, TiO, etc. formula TiO x (wherein , X is a positive real number); oxide of titanium represented by formula VO x (where x is a positive real number) such as V 2 O 5 and VO 2 ; Fe 3 O 4 , Fe 2 O 3 , FeO, etc. Iron oxide represented by the formula FeO x (where x is a positive real number); SnO 2 , SnO, etc.
- Examples of sulfides that can be used as the negative electrode active material include titanium sulfides represented by the formula TiS x (where x is a positive real number) such as Ti 2 S 3 , TiS 2 , and TiS; V 3 S 4 , VS 2, VS and other vanadium sulfides represented by the formula VS x (where x is a positive real number); Fe 3 S 4 , FeS 2 , FeS and other formulas FeS x (where x is a positive real number) Iron sulfide represented; Mo 2 S 3 , MoS 2 and the like MoS x (where x is a positive real number) Molybdenum sulfide; SnS 2, SnS and other formula SnS x (where, a sulfide of tin represented by x is a positive real number; a sulfide of tungsten represented by a formula WS x (where x is a positive real number) such as WS 2
- Examples of the nitride that can be used as the negative electrode active material include Li 3 N and Li 3-x A x N (where A is one or both of Ni and Co, and 0 ⁇ x ⁇ 3). And lithium-containing nitrides.
- These carbon materials, oxides, sulfides and nitrides may be used alone or in combination of two or more. These carbon materials, oxides, sulfides and nitrides may be crystalline or amorphous.
- examples of the metal that can be used as the negative electrode active material include lithium metal, silicon metal, and tin metal.
- Alloys that can be used as the negative electrode active material include lithium alloys such as Li—Al, Li—Ni, Li—Si, Li—Sn, and Li—Sn—Ni; silicon alloys such as Si—Zn; Sn—Mn, Sn -Tin alloys such as Co, Sn-Ni, Sn-Cu, Sn-La; alloys such as Cu 2 Sb, La 3 Ni 2 Sn 7 ;
- These metals and alloys are mainly used alone as electrodes after being processed into a foil shape, for example.
- carbon materials containing graphite as a main component such as natural graphite and artificial graphite, are preferably used.
- the shape of the carbon material may be any of a flake shape such as natural graphite, a spherical shape such as mesocarbon microbeads, a fibrous shape such as graphitized carbon fiber, or an aggregate of fine powder.
- the negative electrode mixture may contain a binder as necessary.
- the binder include thermoplastic resins, and specific examples include PVdF, thermoplastic polyimide, carboxymethyl cellulose, polyethylene, and polypropylene.
- the negative electrode current collector of the negative electrode examples include a band-shaped member made of a metal material such as Cu, Ni, and stainless steel. In particular, it is preferable to use Cu as a forming material and process it into a thin film from the viewpoint that it is difficult to make an alloy with lithium and it is easy to process.
- Examples of the separator included in the lithium secondary battery of the present embodiment include a porous film, a nonwoven fabric, a woven fabric, and the like made of a material such as a polyolefin resin such as polyethylene and polypropylene, a fluororesin, and a nitrogen-containing aromatic polymer. A material having the following can be used. Moreover, a separator may be formed by using two or more of these materials, or a separator may be formed by laminating these materials.
- the separator allows the electrolyte to permeate well when the battery is used (during charging / discharging). Therefore, the air resistance according to the Gurley method defined in JIS P 8117 is 50 seconds / 100 cc or more, 300 seconds / 100 cc. Or less, more preferably 50 seconds / 100 cc or more and 200 seconds / 100 cc or less.
- the porosity of the separator is preferably 30% by volume to 80% by volume, more preferably 40% by volume to 70% by volume.
- the separator may be a laminate of separators having different porosity.
- the electrolyte solution included in the lithium secondary battery of this embodiment contains an electrolyte and an organic solvent.
- the electrolyte contained in the electrolyte includes LiClO 4 , LiPF 6 , LiAsF 6 , LiSbF 6 , LiBF 4 , LiCF 3 SO 3 , LiN (SO 2 CF 3 ) 2 , LiN (SO 2 C 2 F 5 ) 2 , LiN (SO 2 CF 3 ) (COCF 3 ), Li (C 4 F 9 SO 3 ), LiC (SO 2 CF 3 ) 3 , Li 2 B 10 Cl 10 , LiBOB (where BOB is bis (oxalato) borate LiFSI (here, FSI is bis (fluorosulfonyl) imide), lithium salt such as lower aliphatic carboxylic acid lithium salt, LiAlCl 4, and a mixture of two or more of these May be used.
- BOB bis (oxalato) borate LiFSI (here, FSI is bis (fluorosulfonyl) imide)
- lithium salt such as lower aliphatic
- the electrolyte is at least selected from the group consisting of LiPF 6 containing fluorine, LiAsF 6 , LiSbF 6 , LiBF 4 , LiCF 3 SO 3 , LiN (SO 2 CF 3 ) 2 and LiC (SO 2 CF 3 ) 3. It is preferable to use one containing one kind.
- Examples of the organic solvent contained in the electrolyte include propylene carbonate, ethylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, 4-trifluoromethyl-1,3-dioxolan-2-one, and 1,2-di- Carbonates such as (methoxycarbonyloxy) ethane; 1,2-dimethoxyethane, 1,3-dimethoxypropane, pentafluoropropyl methyl ether, 2,2,3,3-tetrafluoropropyl difluoromethyl ether, tetrahydrofuran, 2- Ethers such as methyltetrahydrofuran; Esters such as methyl formate, methyl acetate and ⁇ -butyrolactone; Nitriles such as acetonitrile and butyronitrile; N, N-dimethylformamide, N, N-dimethyla Amides such as toamide; carbamates such as 3-methyl-2-oxazolidone;
- a mixed solvent containing carbonates is preferable, and a mixed solvent of cyclic carbonate and acyclic carbonate and a mixed solvent of cyclic carbonate and ether are more preferable.
- a mixed solvent of cyclic carbonate and acyclic carbonate a mixed solvent containing ethylene carbonate, dimethyl carbonate and ethyl methyl carbonate is preferable.
- the electrolyte using such a mixed solvent has a wide operating temperature range, hardly deteriorates even when charged and discharged at a high current rate, hardly deteriorates even when used for a long time, and natural graphite as an active material of the negative electrode. Even when a graphite material such as artificial graphite is used, it has many advantageous features that it is hardly decomposable.
- an electrolytic solution containing a lithium salt containing fluorine such as LiPF 6 and an organic solvent having a fluorine substituent because the safety of the obtained lithium secondary battery is increased.
- a mixed solvent containing ethers having fluorine substituents such as pentafluoropropyl methyl ether and 2,2,3,3-tetrafluoropropyl difluoromethyl ether and dimethyl carbonate is capable of capacity even when charging / discharging at a high current rate. Since the maintenance rate is high, it is more preferable.
- a solid electrolyte may be used instead of the above electrolytic solution.
- the solid electrolyte for example, an organic polymer electrolyte such as a polyethylene oxide polymer compound, a polymer compound containing at least one of a polyorganosiloxane chain or a polyoxyalkylene chain can be used.
- maintained the non-aqueous electrolyte in the high molecular compound can also be used.
- Li 2 S—SiS 2 , Li 2 S—GeS 2 , Li 2 S—P 2 S 5 , Li 2 S—B 2 S 3 , Li 2 S—SiS 2 —Li 3 PO 4 , Li 2 S—SiS 2 -Li 2 SO 4, Li 2 S-GeS 2 -P 2 S 5 inorganic solid electrolytes containing a sulfide, and the like, may be used a mixture of two or more thereof. By using these solid electrolytes, the safety of the lithium secondary battery may be further improved.
- the solid electrolyte when a solid electrolyte is used, the solid electrolyte may serve as a separator, and in that case, the separator may not be required.
- a lithium secondary battery using the positive electrode active material has higher cycle characteristics than the conventional ones, and It can have a high discharge capacity.
- the lithium secondary battery has high cycle characteristics and high discharge capacity. Can be.
- the lithium secondary battery having the above-described configuration has the above-described positive electrode, it becomes a lithium secondary battery having higher cycle characteristics and higher discharge capacity than before.
- composition analysis of positive electrode active material for lithium secondary battery is conducted by dissolving the obtained lithium-containing composite metal oxide powder in hydrochloric acid and then inductively bonding The measurement was performed using a plasma emission analyzer (manufactured by SII Nanotechnology Inc., SPS3000).
- the lithium-containing composite metal oxide particles to be measured are placed on a conductive sheet affixed on a sample stage, and JSM-5510 manufactured by JEOL Ltd. is used. Then, SEM observation was performed by irradiating an electron beam with an acceleration voltage of 20 kV. 50 primary particles are arbitrarily extracted from an image (SEM photograph) obtained by SEM observation, and for each primary particle, a distance between parallel lines sandwiched by parallel lines obtained by drawing a projection image of the primary particles from a certain direction ( (Directional diameter) was measured as the particle diameter of the primary particles. The arithmetic average value of the obtained particle diameter was defined as the average primary particle diameter of the lithium-containing composite metal oxide.
- the half width of the peak corresponding to peak A and the half width of the peak corresponding to peak B are obtained from the powder X-ray diffraction pattern, and the crystallite size is calculated by the Scherrer equation. Calculated.
- the lithium-containing composite metal oxidation is calculated according to the following formula: The lithium hydroxide concentration and lithium carbonate concentration remaining in the product were calculated.
- Lithium hydroxide concentration (%) 0.1 ⁇ (2A-B) /1000 ⁇ 23.941/ (20 ⁇ 60/100) ⁇ 100
- Lithium carbonate concentration (%) 0.1 ⁇ (BA) /1000 ⁇ 73.882/ (20 ⁇ 60/100) ⁇ 100
- a paste-like positive electrode mixture was prepared by adding and kneading so as to have a composition of 5: 3 (mass ratio).
- N-methyl-2-pyrrolidone was used as the organic solvent.
- the obtained positive electrode mixture was applied to a 40 ⁇ m thick Al foil serving as a current collector and vacuum dried at 150 ° C. for 8 hours to obtain a positive electrode.
- the electrode area of this positive electrode was 1.65 cm 2 .
- the electrolyte used was dissolved in a 16:10:74 (volume ratio) mixture of ethylene carbonate, dimethyl carbonate and ethyl methyl carbonate so that vinylene carbonate was 1 vol% and LiPF 6 was 1.3 mol / L. Prepared.
- artificial graphite (MAGD manufactured by Hitachi Chemical Co., Ltd.) is used as the negative electrode, and the negative electrode is placed on the upper side of the laminated film separator, covered with a gasket, and caulked by a caulking machine to be a lithium secondary battery (coin type battery).
- Coin-type battery hereinafter referred to as “coin-type battery”.
- Example 1 Production of Lithium-Containing Composite Metal Oxide 1 After water was put into a reaction vessel equipped with a stirrer and an overflow pipe, an aqueous sodium hydroxide solution was added to keep the liquid temperature at 50 ° C.
- a nickel sulfate aqueous solution, a cobalt sulfate aqueous solution, and a manganese sulfate aqueous solution are mixed so that the atomic ratio of nickel atoms, cobalt atoms, and manganese atoms is 0.60: 0.20: 0.20. It was adjusted.
- nickel cobalt manganese composite hydroxide particles 1 were obtained.
- the obtained particles were filtered, washed with water, and dried at 100 ° C. to obtain a dry powder of nickel cobalt manganese composite hydroxide 1.
- the nickel cobalt manganese composite hydroxide 1 had a BET specific surface area of 10.3 m 2 / g.
- the 10% cumulative volume particle size D 10 and 90% cumulative volume particle size D 90 were 3.2 and 12.4 ⁇ m, respectively, and D 90 / D 10 was 3.9.
- the crystallite sizes calculated from the peak A and the peak B of the lithium-containing composite metal oxide 1 were 700 mm and 425 mm, respectively.
- the BET specific surface area of the lithium-containing composite metal oxide 1 was 0.60 m 2 / g, and ( ⁇ / ⁇ ) / 1000 was 1.17.
- the amount of lithium hydroxide and lithium carbonate remaining in the lithium-containing composite metal oxide 1 were 0.17% by mass and 0.14% by mass, respectively.
- the powder conductivity of the lithium-containing composite metal oxide 1 when pressed at 6.37 kN / cm 2 was 1.22 ⁇ 10 ⁇ 2 S / cm.
- a coin-type battery was produced using the positive electrode active material 1 and a cycle test was performed.
- the first discharge capacity, the 200th discharge capacity, and the discharge capacity retention rate were 151 mAh / g, 139 mAh / g, and 92%, respectively.
- Example 2 Production of lithium-containing composite metal oxide 2
- a nickel cobalt manganese composite hydroxide was prepared in the same manner as in Example 1 except that an aqueous sodium hydroxide solution was added dropwise so that the pH of the solution in the reaction vessel was 12.4. 2 was obtained.
- the nickel cobalt manganese composite hydroxide 2 had a BET specific surface area of 39.9 m 2 / g.
- the primary particle diameter of the lithium-containing composite metal oxide 2, 50% cumulative volume particle size D 50, were respectively 0.42 .mu.m, 5.5 [mu] m. Further, the 10% cumulative volume particle size D 10 and the 90% cumulative volume particle size D 90 were 2.4 and 13.2 ⁇ m, respectively, and D 90 / D 10 was 5.5.
- the crystallite sizes calculated from the peak A and the peak B of the lithium-containing composite metal oxide 2 were 857 ⁇ and 520 ⁇ , respectively.
- the BET specific surface area of the lithium-containing composite metal oxide 2 was 1.00 m 2 / g, and ( ⁇ / ⁇ ) / 1000 was 0.86.
- the amounts of lithium hydroxide and lithium carbonate remaining in the lithium-containing composite metal oxide 2 were 0.30% by mass and 0.76% by mass, respectively.
- the powder conductivity of the lithium-containing composite metal oxide 2 at 6.37 kN / cm 2 pressure was 3.86 ⁇ 10 ⁇ 3 S / cm.
- a coin-type battery was produced using the positive electrode active material 2, and a cycle test was performed.
- the first discharge capacity, the 200th discharge capacity, and the discharge capacity retention rate were 150 mAh / g, 130 mAh / g, and 87%, respectively.
- Example 3 Production of lithium-containing composite metal oxide 3
- the fired product 2A obtained in Example 2 was fired at 850 ° C. for 10 hours in an oxygen atmosphere to obtain the target lithium-containing composite metal oxide 3, ie, lithium-nickel cobalt manganese composite oxide 3 was obtained.
- the primary particle diameter of the lithium-containing composite metal oxide 3, 50% cumulative volume particle size D 50, were respectively 0.32 [mu] m, 5.2 .mu.m. Further, the 10% cumulative volume particle size D 10 and the 90% cumulative volume particle size D 90 were 2.4 and 8.4 ⁇ m, respectively, and D 90 / D 10 was 3.5.
- the crystallite sizes calculated from the peak A and the peak B of the lithium-containing composite metal oxide 3 were 789 mm and 464 mm, respectively.
- the BET specific surface area of the lithium-containing composite metal oxide 3 was 0.60 m 2 / g, and ( ⁇ / ⁇ ) / 1000 was 1.32.
- the amounts of lithium hydroxide and lithium carbonate remaining in the lithium-containing composite metal oxide 3 were 0.40% by mass and 0.22% by mass, respectively.
- the powder electrical conductivity of the lithium-containing composite metal oxide 3 when pressed at 6.37 kN / cm 2 was 4.72 ⁇ 10 ⁇ 3 S / cm.
- a coin-type battery was produced using the positive electrode active material 3 and subjected to a cycle test.
- the first discharge capacity, the 200th discharge capacity, and the discharge capacity retention rate were 154 mAh / g, 139 mAh / g, and 90%, respectively.
- Example 4 Production of lithium-containing composite metal oxide 4 As in Example 1, except that the liquid temperature in the reaction vessel was 45 ° C., and an aqueous sodium hydroxide solution was added dropwise so that the pH of the solution in the reaction vessel was 12.8.
- the nickel cobalt manganese composite hydroxide 3 was obtained.
- the nickel cobalt manganese composite hydroxide 3 had a BET specific surface area of 73.4 m 2 / g.
- the primary particle diameter of the lithium-containing composite metal oxide 4, 50% cumulative volume particle size D 50, were respectively 0.40 .mu.m, 5.1 .mu.m. Further, the 10% cumulative volume particle size D 10 and the 90% cumulative volume particle size D 90 were 2.6 and 9.8 ⁇ m, respectively, and D 90 / D 10 was 3.8.
- the crystallite sizes calculated from the peak A and the peak B of the lithium-containing composite metal oxide 4 were 866 ⁇ and 520 ⁇ , respectively.
- the BET specific surface area of the lithium-containing composite metal oxide 4 was 0.79 m 2 / g, and ( ⁇ / ⁇ ) / 1000 was 1.10.
- the amounts of lithium hydroxide and lithium carbonate remaining in the lithium-containing composite metal oxide 4 were 0.47% by mass and 0.35% by mass, respectively.
- the powder conductivity of the lithium-containing composite metal oxide 4 when pressed at 6.37 kN / cm 2 was 3.03 ⁇ 10 ⁇ 3 S / cm.
- a coin-type battery was produced using the positive electrode active material 4, and a cycle test was performed.
- the first discharge capacity, the 200th discharge capacity, and the discharge capacity retention rate were 153 mAh / g, 137 mAh / g, and 90%, respectively.
- the crystallite sizes calculated from the peak A and the peak B of the lithium-containing composite metal oxide 5 were 1365 mm and 693 mm, respectively.
- the BET specific surface area of the lithium-containing composite metal oxide 5 was 0.58 m 2 / g, and ( ⁇ / ⁇ ) / 1000 was 2.35.
- the amounts of lithium hydroxide and lithium carbonate remaining in the lithium-containing composite metal oxide 5 were 0.17% by mass and 1.60% by mass, respectively.
- the powder conductivity of the lithium-containing composite metal oxide 5 when pressed at 6.37 kN / cm 2 was 2.00 ⁇ 10 ⁇ 3 S / cm.
- the 10% cumulative volume particle size D 10 and 90% cumulative volume particle size D 90 were 3.0 and 33.3 ⁇ m, respectively, and D 90 / D 10 was 11.1.
- the crystallite sizes calculated from the peak A and the peak B of the lithium-containing composite metal oxide 6 were 1872 mm and 987 mm, respectively.
- the BET specific surface area of the lithium-containing composite metal oxide 6 was 0.38 m 2 / g, and ( ⁇ / ⁇ ) / 1000 was 4.93.
- the amounts of lithium hydroxide and lithium carbonate remaining in the lithium-containing composite metal oxide 6 were 0.13% by mass and 0.88% by mass, respectively.
- the powder conductivity of the lithium-containing composite metal oxide 6 when pressed at 6.37 kN / cm 2 was 4.43 ⁇ 10 ⁇ 3 S / cm.
- a coin-type battery was produced using the positive electrode active material 6 and a cycle test was performed.
- the first discharge capacity, the 200th discharge capacity, and the discharge capacity retention rate were 135 mAh / g, 114 mAh / g, and 84%, respectively.
- lithium using the lithium-containing composite metal oxide of Comparative Example 2 as the positive electrode active material Indicates that the capacity is higher than that of the secondary battery.
- both lithium using the lithium-containing composite metal oxides of Comparative Examples 1 and 2 as the positive electrode active material It shows that it has higher cycle characteristics than the secondary battery.
- Example 5 Production of lithium-containing composite metal oxide 7 After water was put into a reaction vessel equipped with a stirrer and an overflow pipe, an aqueous sodium hydroxide solution was added to keep the liquid temperature at 45 ° C.
- a nickel sulfate aqueous solution, a cobalt sulfate aqueous solution, and a manganese sulfate aqueous solution are mixed so that the atomic ratio of nickel atoms, cobalt atoms, and manganese atoms is 0.58: 0.17: 0.25. It was adjusted.
- this mixed raw material solution and aqueous ammonium sulfate solution are continuously added as a complexing agent to the reaction vessel, and a sodium hydroxide aqueous solution is added dropwise as needed so that the pH of the solution in the reaction vessel becomes 12.5.
- nickel cobalt manganese composite hydroxide particles were obtained.
- the obtained particles were filtered, washed with water, and dried at 100 ° C. to obtain a dry powder of nickel cobalt manganese composite hydroxide 4.
- the nickel cobalt manganese composite hydroxide 4 had a BET specific surface area of 70.3 m 2 / g.
- the 10% cumulative volume particle size D 10 and 90% cumulative volume particle size D 90 were 2.4 and 8.8 ⁇ m, respectively, and D 90 / D 10 was 3.7.
- the crystallite sizes calculated from the peak A and the peak B of the lithium-containing composite metal oxide 7 were 848 ⁇ and 488 ⁇ , respectively.
- the BET specific surface area of the lithium-containing composite metal oxide 7 was 0.79 m 2 / g, and ( ⁇ / ⁇ ) / 1000 was 1.07.
- the amounts of lithium hydroxide and lithium carbonate remaining in the lithium-containing composite metal oxide 7 were 0.60% by mass and 0.35% by mass, respectively.
- the powder conductivity of the lithium-containing composite metal oxide 7 when pressed at 6.37 kN / cm 2 was 1.62 ⁇ 10 ⁇ 3 S / cm.
- Example 6 Production of lithium-containing composite metal oxide 8
- a nickel cobalt manganese composite hydroxide 5 was obtained in the same manner as in Example 5 except that the pH of the solution in the reaction vessel was changed to 12.7.
- the nickel cobalt manganese composite hydroxide 5 had a BET specific surface area of 75.3 m 2 / g.
- the crystallite sizes calculated from the peak A and the peak B of the lithium-containing composite metal oxide 8 were 847 mm and 505 mm, respectively.
- the BET specific surface area of the lithium-containing composite metal oxide 8 was 0.81 m 2 / g, and ( ⁇ / ⁇ ) / 1000 was 1.05.
- the amounts of lithium hydroxide and lithium carbonate remaining in the lithium-containing composite metal oxide 8 were 0.64% by mass and 0.31% by mass, respectively.
- the powder conductivity of the lithium-containing composite metal oxide 8 when pressed at 6.37 kN / cm 2 was 1.69 ⁇ 10 ⁇ 3 S / cm.
- Example 7 Production of lithium-containing composite metal oxide 9
- a nickel cobalt manganese composite hydroxide 6 was obtained in the same manner as in Example 5 except that the pH of the solution in the reaction vessel was changed to 12.6.
- the nickel cobalt manganese composite hydroxide 6 had a BET specific surface area of 80.9 m 2 / g.
- the crystallite sizes calculated from the peak A and the peak B of the lithium-containing composite metal oxide 9 were 848 mm and 496 mm, respectively.
- the BET specific surface area of the lithium-containing composite metal oxide 9 was 1.20 m 2 / g, and ( ⁇ / ⁇ ) / 1000 was 0.71.
- the amounts of lithium hydroxide and lithium carbonate remaining in the lithium-containing composite metal oxide 9 were 0.62% by mass and 0.27% by mass, respectively.
- the powder conductivity of the lithium-containing composite metal oxide 9 when pressed at 6.37 kN / cm 2 was 1.39 ⁇ 10 ⁇ 3 S / cm.
- a coin-type battery was produced using the positive electrode active material 9, and a cycle test was performed.
- the first discharge capacity, the 200th discharge capacity, and the discharge capacity retention rate were 150 mAh / g, 138 mAh / g, and 92%, respectively.
- the lithium using the lithium-containing composite metal oxide of Comparative Example 2 as the positive electrode active material Indicates that the capacity is higher than that of the secondary battery.
- both lithium using the lithium-containing composite metal oxides of Comparative Examples 1 and 2 as the positive electrode active material It shows that it has higher cycle characteristics than the secondary battery.
- Example 8 Production of Lithium-Containing Composite Metal Oxide 10 After water was placed in a reaction vessel equipped with a stirrer and an overflow pipe, an aqueous sodium hydroxide solution was added to keep the liquid temperature at 50 ° C.
- a nickel sulfate aqueous solution, a cobalt sulfate aqueous solution, and a manganese sulfate aqueous solution are mixed so that the atomic ratio of nickel atoms, cobalt atoms, and manganese atoms is 0.55: 0.21: 0.24. It was adjusted.
- the mixed raw material solution and the ammonium sulfate aqueous solution are continuously added as a complexing agent to the reaction vessel, and a sodium hydroxide aqueous solution is added dropwise in a timely manner so that the pH of the solution in the reaction vessel becomes 12.0.
- nickel cobalt manganese composite hydroxide particles 7 were obtained.
- the obtained particles were filtered, washed with water, and dried at 100 ° C. to obtain a dry powder of nickel cobalt manganese composite hydroxide 7.
- the nickel cobalt manganese composite hydroxide 7 had a BET specific surface area of 60.3 m 2 / g.
- the obtained fired product 10A was fired at 850 ° C. for 10 hours in an air atmosphere to obtain the target lithium-containing composite metal oxide 10, that is, lithium-nickel cobalt manganese composite oxide 10.
- the primary particle diameter of the lithium-containing composite metal oxide 10, 50% cumulative volume particle size D 50, were respectively 0.25 [mu] m, 3.2 .mu.m. Further, the 10% cumulative volume particle size D 10 and the 90% cumulative volume particle size D 90 were 1.9 and 5.5 ⁇ m, respectively, and D 90 / D 10 was 2.9.
- the crystallite sizes calculated from the peak A and the peak B of the lithium-containing composite metal oxide 10 were 805 mm and 496 mm, respectively.
- the BET specific surface area of the lithium-containing composite metal oxide 10 was 1.75 m 2 / g, and ( ⁇ / ⁇ ) / 1000 was 0.46.
- the amounts of lithium hydroxide and lithium carbonate remaining in the lithium-containing composite metal oxide 10 were 0.24% by mass and 0.34% by mass, respectively.
- the powder electrical conductivity of the lithium-containing composite metal oxide 10 when pressed at 6.37 kN / cm 2 was 1.46 ⁇ 10 ⁇ 3 S / cm.
- a coin-type battery was produced using the positive electrode active material 10, and a cycle test was performed.
- the first discharge capacity, the 200th discharge capacity, and the discharge capacity retention rate were 151 mAh / g, 143 mAh / g, and 90%, respectively.
- Example 9 Production of Lithium-Containing Composite Metal Oxide 11 After water was put into a reaction vessel equipped with a stirrer and an overflow pipe, an aqueous sodium hydroxide solution was added to keep the liquid temperature at 50 ° C.
- a nickel sulfate aqueous solution, a cobalt sulfate aqueous solution, and a manganese sulfate aqueous solution are mixed so that the atomic ratio of nickel atoms, cobalt atoms, and manganese atoms is 0.55: 0.21: 0.24. It was adjusted.
- this mixed raw material solution and aqueous ammonium sulfate solution are continuously added as a complexing agent to the reaction vessel, and a sodium hydroxide aqueous solution is added dropwise as needed so that the pH of the solution in the reaction vessel becomes 12.1.
- nickel cobalt manganese composite hydroxide particles were obtained. The obtained particles were filtered, washed with water, and dried at 100 ° C. to obtain a dry powder of nickel cobalt manganese composite hydroxide 8.
- the nickel cobalt manganese composite hydroxide 8 had a BET specific surface area of 82.5 m 2 / g.
- the primary particle diameter of the lithium-containing composite metal oxide 11, 50% cumulative volume particle size D 50, were respectively 0.21 [mu] m, 2.9 .mu.m. Further, the 10% cumulative volume particle size D 10 and the 90% cumulative volume particle size D 90 were 1.9 and 4.5 ⁇ m, respectively, and D 90 / D 10 was 2.4.
- the crystallite sizes calculated from the peak A and the peak B of the lithium-containing composite metal oxide 11 were 774 mm and 514 mm, respectively.
- the BET specific surface area of the lithium-containing composite metal oxide 11 was 2.34 m 2 / g, and ( ⁇ / ⁇ ) / 1000 was 0.33.
- the amounts of lithium hydroxide and lithium carbonate remaining in the lithium-containing composite metal oxide 11 were 0.27% by mass and 0.35% by mass, respectively.
- the powder conductivity of the lithium-containing composite metal oxide 11 when pressed at 6.37 kN / cm 2 was 0.95 ⁇ 10 ⁇ 3 S / cm.
- lithium using the lithium-containing composite metal oxide of Comparative Example 2 as the positive electrode active material Indicates that the capacity is higher than that of the secondary battery.
- both lithium using the lithium-containing composite metal oxides of Comparative Examples 1 and 2 as the positive electrode active material It shows that it has higher cycle characteristics than the secondary battery.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
本願は、2014年5月29日に日本に出願された特願2014-111713号、及び2014年12月25日に日本に出願された特願2014-262692号に基づき優先権を主張し、その内容をここに援用する。
(1)一次粒子径が0.1μm以上1μm以下であり、50%累積体積粒度D50が1μm以上10μm以下
(2)90%累積体積粒度D90と10%累積体積粒度D10との比率D90/D10が2以上6以下
(3)中和滴定により測定された粒子表面の残存アルカリに含まれる炭酸リチウム量が0.1質量%以上0.8質量%以下
LiaNi1-x-y-zMnxCoyMzO2 ・・・(I)
(ここで、aは0.9≦a≦1.2、xは0<x<0.4、yは0<y<0.4、zは0≦z<0.1、1-x-y-zは、0.5<1-x-y-z≦0.65、Mは、Mg、Al、Zrの内いずれか1種以上の金属である。)
本実施形態のリチウム二次電池用正極活物質は、少なくともニッケル、コバルト及びマンガンを含有し、層状構造を有するリチウム二次電池用正極活物質(以下、単に「リチウム含有複合金属酸化物」とする場合がある。)であって、下記要件(1)~(3)を満たすものである。
(1)一次粒子径が0.1μm以上1μm以下であり、50%累積体積粒度D50が1μm以上10μm以下
(2)90%累積体積粒度D90と10%累積体積粒度D10との比率D90/D10が2以上6以下
(3)中和滴定により測定された粒子表面の残存アルカリに含まれる炭酸リチウム量が0.1質量%以上0.8質量%以下
以下、順に説明する。
LiaNi1-x-y-zMnxCoyMzO2 ・・・(I)
(ここで、aは0.9≦a≦1.2、xは0<x<0.4、yは0<y<0.4、zは0≦z<0.1、1-x-y-zは、0.5<1-x-y-z≦0.65、Mは、Mg、Al、Zrの内いずれか1種以上の金属である。)。
aの上限値と下限値は任意に組み合わせることができる。
xの上限値と下限値は任意に組み合わせることができる。
yの上限値と下限値は任意に組み合わせることができる。
よりサイクル特性を高めるリチウム電池を得る意味で、Al及び/又はZrであることが好ましい。また、より熱的安定性を高めるリチウム電池を得る意味で、Mg及び/又はAlであることが好ましい。前述の効果をより高めるために、組成式(I)におけるzは0を超え、0.08以下であることが好ましく、0.005以上0.05以下であることがより好ましく、0.008以上0.02以下であることがさらに好ましい。
1-x-y-zの上限値と下限値は任意に組み合わせることができる。
まず、本実施形態のリチウム含有複合金属酸化物の結晶構造は、層状構造であり、六方晶型の結晶構造または単斜晶型の結晶構造であることがより好ましい。
本実施形態のリチウム二次電池用正極活物質の粒子形態は、一次粒子が凝集して形成された二次粒子、あるいは一次粒子と、一次粒子が凝集して形成された二次粒子との混合物である。本実施形態において、正極活物質の一次粒子径は、0.1μm以上1μm以下である。より初回クーロン効率を高めるリチウム二次電池を得る意味で、一次粒子径は0.2μm以上0.9μm以下であることが好ましく、0.25μm以上0.8μm以下であることがより好ましい。一次粒子の平均粒子径は、SEMで観察することにより測定することができる。
低温(たとえば0℃)環境下における放電容量を高めるリチウム電池を得る意味で、二次粒子径は9μm以下であることが好ましく、8μm以下であることがより好ましく、7μm以下であることがさらに好ましい。また、電極密度を高める意味では、二次粒子径は2μm以上であることが好ましく、3μm以上であることがより好ましく、4μm以上であることがさらに好ましい。
次に、得られた分散液についてマルバーン社製マスターサイザー2000(レーザー回折散乱粒度分布測定装置)を用いて、粒度分布を測定し、体積基準の累積粒度分布曲線を得る。
そして、得られた累積粒度分布曲線において、50%累積時の微小粒子側から見た粒子径の値が、50%累積体積粒度D50であり、正極活物質の二次粒子径であるとした。また、10%累積時の微小粒子側から見た粒子径の値が10%累積体積粒度D10、90%累積時の微小粒子側から見た粒子径の値が90%累積体積粒度D90である。
本実施形態において、D90/D10が低い値であると、粒度分布の幅が狭いことを示し、D90/D10が高い値であると、粒度分布の幅が広いことを示す。
本実施形態の正極活物質においては、放電容量を高めるリチウム電池を得る意味で、CuKα線を使用した粉末X線回折測定において、2θ=18.7±1°の範囲内のピーク(以下、ピークAと呼ぶこともある)における結晶子サイズが600Å以上であることが好ましく、650Å以上であることがより好ましく、700Å以上であることがさらに好ましい。また、サイクル特性を高めたリチウム電池を得る意味で、ピークAにおける結晶子サイズは1400Å以下であることが好ましく、1300Å以下であることがより好ましく、1250Å以下であることがさらに好ましい。
ピークAの上限値と下限値は任意に組み合わせることができる。
また、高い電流レートにおける放電容量を高めるリチウム電池を得る意味で、2θ=44.6±1°の範囲内のピーク(以下、ピークBと呼ぶこともある)における結晶子サイズは350Å以上700Å以下であることが好ましく、400Å以上700Å以下であることが好ましく、450Å以上700Å以下であることが好ましく、500Å以上675Å以下であることがより好ましい。
ピークBの上限値と下限値は任意に組み合わせることができる。 さらに、高温(たとえば60℃)環境下での保存特性を高めるリチウム電池を得る意味で、ピークAにおける結晶子サイズをピークBにおける結晶子サイズで除した値は、0.8以上2.8以下であることが好ましく、1.2以上2.2以下であることがより好ましい。
また、本実施形態の正極活物質のBET比表面積は、0.1m2/g以上2.0m2/g以下であることが好ましい。正極活物質のBET比表面積を上記の範囲とすることにより、得られるリチウム二次電池の低温における電池抵抗(即ち、リチウムイオンおよび電子の拡散抵抗)を低減させることができる。本発明の効果をより高める意味で、リチウム含有複合金属酸化物のBET比表面積は、0.3m2/g以上であることが好ましく、0.5m2/g以上であることがより好ましい。また、充填性の観点でBET比表面積は1.8m2/g以下であることが好ましく、1.5m2/g以下であることがより好ましい。
BET比表面積の上限値と下限値は任意に組み合わせることができる。
本実施形態の正極活物質の中和滴定により測定された粒子表面の残存アルカリに含まれる炭酸リチウム量は、0.1質量%以上0.8質量%以下である。サイクル特性を高めるリチウム電池を得る意味で0.2質量%以上であることが好ましく、0.3質量%以上であることがより好ましい。また、充放電サイクル中における電池の膨れを抑制する意味から、中和滴定により測定された粒子表面の残存アルカリに含まれる炭酸リチウム量は0.78質量%以下であることが好ましく、0.77質量%以下であることがより好ましい。
炭酸リチウム量と水酸化リチウム量の和の上限値と下限値は任意に組み合わせることができる。
本実施形態の正極活物質において、高い電流レートにおける放電容量を高める意味で、6.37kN/cm2加圧時における粉体導電率が1×10-3S/cm以上であることが好ましく、5×10-3S/cm以上であることがより好ましい。サイクル特性を高めるリチウム電池を得る意味で1×10-1S/cm以下であることが好ましく、8×10-2S/cm以下であることがより好ましい。
6.37kN/cm2加圧時における粉体導電率の上限値と下限値は任意に組み合わせることができる。
本発明において、リチウム含有複合金属酸化物は、所定の粒子径を有しているため、表面積が増大することから、粒子同士の接触面積が増大するため抵抗を抑えることが可能となり、高い放電容量を達成できると考えられる。
さらに、本発明において、BET比表面積を高くすることにより、粒子内部に空隙が生じ、該粒子内部の空隙が充放電時の体積変化に伴う一次粒子間の粒界に生じる応力の集中を緩和することが可能となるため、高いサイクル特性を達成できると考えられる。また、結晶子サイズを小さくすることにより、充放電時の体積変化を小さくすることが可能となるため、高いサイクル特性を達成できると考えられる。
本発明のリチウム含有複合金属酸化物を製造するにあたって、まず、リチウム以外の金属、すなわち、Ni、Co及びMnの必須金属、並びに、Mg、Al、Zrのうちいずれか1種以上の任意金属を含む金属複合化合物を調製し、当該金属複合化合物を適当なリチウム塩と焼成することが好ましい。金属複合化合物としては、金属複合水酸化物又は金属複合酸化物が好ましい。以下に、正極活物質の製造方法の一例を、金属複合化合物の製造工程と、リチウム含有複合金属酸化物の製造工程とに分けて説明する。
金属複合化合物は、通常公知のバッチ法又は共沈殿法により製造することが可能である。以下、金属として、ニッケル、コバルト及びマンガンを含む金属複合水酸化物を例に、その製造方法を詳述する。
上記金属複合酸化物又は水酸化物を乾燥した後、リチウム塩と混合する。乾燥条件は、特に制限されないが、例えば、金属複合酸化物又は水酸化物が酸化・還元されない条件(酸化物→酸化物、水酸化物→水酸化物)、金属複合水酸化物が酸化される条件(水酸化物→酸化物)、金属複合酸化物が還元される条件(酸化物→水酸化物)のいずれの条件でもよい。酸化・還元がされない条件のためには、窒素、ヘリウム及びアルゴン等の希ガス等の不活性ガスを使用すればよく、水酸化物が酸化される条件では、酸素又は空気を雰囲気下として行えばよい。また、金属複合酸化物が還元される条件としては、不活性ガス雰囲気下、ヒドラジン、亜硫酸ナトリウム等の還元剤を使用すればよい。リチウム塩としては、炭酸リチウム、硝酸リチウム、酢酸リチウム、水酸化リチウム、水酸化リチウム水和物、酸化リチウムのうち何れか一つ、または、二つ以上を混合して使用することができる。
次いで、リチウム二次電池の構成を説明しながら、本実施形態のリチウム含有複合金属酸化物をリチウム二次電池の正極活物質として用いた正極、およびこの正極を有するリチウム二次電池について説明する。
(正極)
本実施形態の正極は、まず正極活物質、導電材およびバインダーを含む正極合剤を調整し、正極合剤を正極集電体に担持させることで製造することができる。
本実施形態の正極が有する導電材としては、炭素材料を用いることができる。炭素材料として黒鉛粉末、カーボンブラック(例えばアセチレンブラック)、繊維状炭素材料などを挙げることができる。カーボンブラックは、微粒で表面積が大きいため、少量を正極合剤中に添加することにより正極内部の導電性を高め、充放電効率および出力特性を向上させることができるが、多く入れすぎるとバインダーによる正極合剤と正極集電体との結着力、および正極合剤内部の結着力がいずれも低下し、かえって内部抵抗を増加させる原因となる。
本実施形態の正極が有するバインダーとしては、熱可塑性樹脂を用いることができる。
この熱可塑性樹脂としては、ポリフッ化ビニリデン(以下、PVdFということがある。)、ポリテトラフルオロエチレン(以下、PTFEということがある。)、四フッ化エチレン・六フッ化プロピレン・フッ化ビニリデン系共重合体、六フッ化プロピレン・フッ化ビニリデン系共重合体、四フッ化エチレン・パーフルオロビニルエーテル系共重合体などのフッ素樹脂;ポリエチレン、ポリプロピレンなどのポリオレフィン樹脂;を挙げることができる。
本実施形態の正極が有する正極集電体としては、Al、Ni、ステンレスなどの金属材料を形成材料とする帯状の部材を用いることができる。なかでも、加工しやすく、安価であるという点でAlを形成材料とし、薄膜状に加工したものが好ましい。
(負極)
本実施形態のリチウム二次電池が有する負極は、正極よりも低い電位でリチウムイオンのドープかつ脱ドープが可能であればよく、負極活物質を含む負極合剤が負極集電体に担持されてなる電極、および負極活物質単独からなる電極を挙げることができる。
負極が有する負極活物質としては、炭素材料、カルコゲン化合物(酸化物、硫化物など)、窒化物、金属または合金で、正極よりも低い電位でリチウムイオンのドープかつ脱ドープが可能な材料が挙げられる。
負極が有する負極集電体としては、Cu、Ni、ステンレスなどの金属材料を形成材料とする帯状の部材を挙げることができる。なかでも、リチウムと合金を作り難く、加工しやすいという点で、Cuを形成材料とし、薄膜状に加工したものが好ましい。
本実施形態のリチウム二次電池が有するセパレータとしては、例えば、ポリエチレン、ポリプロピレンなどのポリオレフィン樹脂、フッ素樹脂、含窒素芳香族重合体などの材質からなる、多孔質膜、不織布、織布などの形態を有する材料を用いることができる。また、これらの材質を2種以上用いてセパレータを形成してもよいし、これらの材料を積層してセパレータを形成してもよい。
本実施形態のリチウム二次電池が有する電解液は、電解質および有機溶媒を含有する。
本実施例においては、リチウム含有複合金属酸化物(正極活物質)の評価、正極およびリチウム二次電池の作製評価を、次のようにして行った。
1.リチウム二次電池用正極活物質の組成分析
後述の方法で製造されるリチウム含有複合金属酸化物の組成分析は、得られたリチウム含有複合金属酸化物の粉末を塩酸に溶解させた後、誘導結合プラズマ発光分析装置(エスアイアイ・ナノテクノロジー株式会社製、SPS3000)を用いて行った。
測定するリチウム含有複合金属酸化物の粒子を、サンプルステージの上に貼った導電性シート上に載せ、日本電子株式会社製JSM-5510を用いて、加速電圧が20kVの電子線を照射してSEM観察を行った。SEM観察により得られた画像(SEM写真)から任意に50個の一次粒子を抽出し、それぞれの一次粒子について、一次粒子の投影像を一定方向から引いた平行線ではさんだ平行線間の距離(定方向径)を一次粒子の粒子径として測定した。得られた粒子径の算術平均値を、リチウム含有複合金属酸化物の平均一次粒子径とした。
測定するリチウム含有複合金属酸化物の粉末0.1gを、0.2質量%ヘキサメタりん酸ナトリウム水溶液50mlに投入し、該粉末を分散させた分散液を得た。得られた分散液についてマルバーン社製マスターサイザー2000(レーザー回折散乱粒度分布測定装置)を用いて、粒度分布を測定し、体積基準の累積粒度分布曲線を得た。得られた累積粒度分布曲線において、微小粒子側から見て10%累積時、50%累積時、90%累積時の体積粒度をそれぞれ、D10、D50、D90とした。
リチウム含有複合金属酸化物の粉末X線回折測定は、X線回折装置(X‘Prt PRO、PANalytical社)を用いて行った。得られたリチウム含有複合金属酸化物を専用の基板に充填し、CuKα線源を用いて、回折角2θ=10°~90°の範囲にて測定を行うことで、粉末X線回折図形を得た。粉末X線回折パターン総合解析ソフトウェアJADE5を用い、該粉末X線回折図形からピークAに対応するピークの半値幅およびピークBに対応するピークの半値幅を得て、Scherrer式により、結晶子サイズを算出した。
測定するリチウム含有複合金属酸化物の粉末1gを窒素雰囲気中、150℃で15分間乾燥させた後、マイクロメリティックス製フローソーブII2300を用いて測定した。
リチウム含有複合金属酸化物20gと純水100gを100mLビーカーに入れ、5分間撹拌した。撹拌後、リチウム含有複合金属酸化物を濾過し、残った濾液の60gに0.1mol/L塩酸を滴下し、pHメーターにて濾液のpHを測定した。pH=8.3±0.1時の塩酸の滴定量をA mL、pH=4.5±0.1時の塩酸の滴定量をB mLとして、下記の計算式より、リチウム含有複合金属酸化物中に残存する水酸化リチウム濃度、炭酸リチウム濃度を算出した。
水酸化リチウム濃度(%)=
0.1×(2A-B)/1000×23.941/(20×60/100)×100
炭酸リチウム濃度(%)=
0.1×(B-A)/1000×73.882/(20×60/100)×100
粉体導電率測定は、三菱化学アナリテック社製MCP-PD51を用いて、下記条件にて行った。
リチウム含有複合金属酸化物量 : 4.0g
ステージの直径 : 20mm
圧力 : 20kN
後述する製造方法で得られるリチウム含有複合金属酸化物(正極活物質)と導電材(アセチレンブラック)とバインダー(PVdF)とを、正極活物質:導電材:バインダー=92:5:3(質量比)の組成となるように加えて混練することにより、ペースト状の正極合剤を調製した。正極合剤の調製時には、N-メチル-2-ピロリドンを有機溶媒として用いた。
得られた正極合剤を、集電体となる厚さ40μmのAl箔に塗布して150℃で8時間真空乾燥を行い、正極を得た。この正極の電極面積は1.65cm2とした。
以下の操作を、アルゴン雰囲気のグローブボックス内で行った。
「(2)正極の作製」で作成した正極を、コイン型電池R2032用のコインセル(宝泉株式会社製)の下蓋にアルミ箔面を下に向けて置き、その上に積層フィルムセパレータ(ポリエチレン製多孔質フィルムの上に、耐熱多孔層を積層(厚み16μm))を置いた。ここに電解液を300μL注入した。用いた電解液は、エチレンカーボネートとジメチルカーボネートとエチルメチルカーボネートとの16:10:74(体積比)混合液に、ビニレンカーボネートを1vol%、LiPF6を1.3mol/Lとなるように溶解して調製した。
次に、負極として人造黒鉛(日立化成社製MAGD)を用いて、前記負極を積層フィルムセパレータの上側に置き、ガスケットを介して上蓋をし、かしめ機でかしめてリチウム二次電池(コイン型電池R2032。以下、「コイン型電池」と称することがある。)を作製した。
「(3)リチウム二次電池(コイン型セル)の作製」で作製したコイン型電池を用いて、以下に示す条件で負極を活性化した。活性化処理における、充電容量および放電容量をそれぞれ以下のようにして求めた。
処理温度:25℃
充電時条件:充電最大電圧4.2V、充電時間5時間、充電電流0.2CA
放電時条件:放電最小電圧2.7V、放電時間5時間、放電電流0.2CA
上記で充放電試験を実施したコイン型セルを用いて、以下に示す条件にて、200回のサイクル試験にて寿命評価を実施し、200回後の放電容量維持率を以下の式にて算出した。なお、200回後の放電容量維持率が高いほど、寿命特性がよいことを示している。
200回後の放電容量維持率(%)=200回目の放電容量/1回目の放電容量×100
試験温度:60℃
充電時条件:充電時最大電圧4.1V、充電時間0.5時間、充電電流2.0CA
充電後休止時間:10分
放電時条件:放電時最小電圧3.0V、放電時間0.5時間、放電電流2.0CA
放電後休止時間:10分
本試験において、充電、充電休止、放電、放電休止を順に実施した工程を1回としている。
1.リチウム含有複合金属酸化物1の製造
攪拌器およびオーバーフローパイプを備えた反応槽内に水を入れた後、水酸化ナトリウム水溶液を添加し、液温を50℃に保持した。
得られたリチウム含有複合金属酸化物1の組成分析を行ったところ、Li:Ni:Co:Mnのモル比は、1.05:0.61:0.20:0.19であった。
正極活物質1を用いてコイン型電池を作製し、サイクル試験を実施した。1回目の放電容量、200回目の放電容量、放電容量維持率は、それぞれ151mAh/g、139mAh/g、92%であった。
1.リチウム含有複合金属酸化物2の製造
反応槽内の溶液のpHが12.4になるよう水酸化ナトリウム水溶液を適時滴下した以外は実施例1と同様の操作を行い、ニッケルコバルトマンガン複合水酸化物2を得た。このニッケルコバルトマンガン複合水酸化物2のBET比表面積は、39.9m2/gであった。
得られたリチウム含有複合金属酸化物2の組成分析を行ったところ、Li:Ni:Mn:Coのモル比は、1.08:0.60:0.20:0.20であった。
正極活物質2を用いてコイン型電池を作製し、サイクル試験を実施した。1回目の放電容量、200回目の放電容量、放電容量維持率は、それぞれ150mAh/g、130mAh/g、87%であった。
1.リチウム含有複合金属酸化物3の製造
実施例2で得られた焼成物2Aを酸素雰囲気下850℃で10時間焼成して、目的のリチウム含有複合金属酸化物3すなわちリチウム-ニッケルコバルトマンガン複合酸化物3を得た。
得られたリチウム含有複合金属酸化物3の組成分析を行ったところ、Li:Ni:Mn:Coのモル比は、1.10:0.60:0.20:0.20であった。
正極活物質3を用いてコイン型電池を作製し、サイクル試験を実施した。1回目の放電容量、200回目の放電容量、放電容量維持率は、それぞれ154mAh/g、139mAh/g、90%であった。
1.リチウム含有複合金属酸化物4の製造
反応槽内の液温を45℃とし、反応槽内の溶液のpHが12.8になるよう水酸化ナトリウム水溶液を適時滴下しした以外は実施例1と同様の操作を行い、ニッケルコバルトマンガン複合水酸化物3を得た。このニッケルコバルトマンガン複合水酸化物3のBET比表面積は、73.4m2/gであった。
得られたリチウム含有複合金属酸化物4の組成分析を行ったところ、Li:Ni:Mn:Coのモル比は、1.09:0.60:0.20:0.20であった。
正極活物質4を用いてコイン型電池を作製し、サイクル試験を実施した。1回目の放電容量、200回目の放電容量、放電容量維持率は、それぞれ153mAh/g、137mAh/g、90%であった。
1.リチウム含有複合金属酸化物5の製造
実施例1で得られたニッケルコバルトマンガン複合水酸化物1の乾燥粉末に対してLi/(Ni+Co+Mn)=1.05となるように秤量して混合した後、大気雰囲気下850℃で10時間焼成して、目的のリチウム含有複合金属酸化物5すなわちリチウム-ニッケルコバルトマンガン複合酸化物5を得た。
得られたリチウム含有複合金属酸化物5の組成分析を行ったところ、Li:Ni:Mn:Coのモル比は、1.07:0.60:0.20:0.20であった。
正極活物質5を用いてコイン型電池を作製し、サイクル試験を実施した。1回目の放電容量、200回目の放電容量、放電容量維持率は、それぞれ155mAh/g、129mAh/g、83%であった。
1.リチウム含有複合金属酸化物6の製造
実施例1で得られたニッケルコバルトマンガン複合水酸化物1の乾燥粉末に対してLi/(Ni+Co+Mn)=1.05となるように秤量して混合した後、大気雰囲気下900℃で10時間焼成して、目的のリチウム含有複合金属酸化物6すなわちリチウム-ニッケルコバルトマンガン複合酸化物6を得た。
得られたリチウム含有複合金属酸化物6の組成分析を行ったところ、Li:Ni:Mn:Coのモル比は、1.04:0.60:0.20:0.20であった。
正極活物質6を用いてコイン型電池を作製し、サイクル試験を実施した。1回目の放電容量、200回目の放電容量、放電容量維持率は、それぞれ135mAh/g、114mAh/g、84%であった。
また、実施例1~4のリチウム含有複合金属酸化物を正極活物質として用いたリチウム二次電池では、いずれも、比較例1および2のリチウム含有複合金属酸化物を正極活物質として用いたリチウム二次電池よりも高いサイクル特性を有することを示す。
1.リチウム含有複合金属酸化物7の製造
攪拌器およびオーバーフローパイプを備えた反応槽内に水を入れた後、水酸化ナトリウム水溶液を添加し、液温を45℃に保持した。
得られたリチウム含有複合金属酸化物7の組成分析を行ったところ、Li:Ni:Mn:Coのモル比は、1.13:0.58:0.25:0.17であった。
正極活物質7を用いてコイン型電池を作製し、サイクル試験を実施した。1回目の放電容量、200回目の放電容量、放電容量維持率は、それぞれ149mAh/g、138mAh/g、93%であった。
1.リチウム含有複合金属酸化物8の製造
反応槽内の溶液のpHを12.7とした以外は実施例5と同様の操作を行い、ニッケルコバルトマンガン複合水酸化物5を得た。このニッケルコバルトマンガン複合水酸化物5のBET比表面積は、75.3m2/gであった。
得られたリチウム含有複合金属酸化物8の組成分析を行ったところ、Li:Ni:Mn:Coのモル比は、1.12:0.58:0.25:0.17であった。
正極活物質8を用いてコイン型電池を作製し、サイクル試験を実施した。1回目の放電容量、200回目の放電容量、放電容量維持率は、それぞれ151mAh/g、135mAh/g、89%であった。
1.リチウム含有複合金属酸化物9の製造
反応槽内の溶液のpHを12.6した以外は実施例5と同様の操作を行い、ニッケルコバルトマンガン複合水酸化物6を得た。このニッケルコバルトマンガン複合水酸化物6のBET比表面積は、80.9m2/gであった。
得られたリチウム含有複合金属酸化物9の組成分析を行ったところ、Li:Ni:Mn:Coのモル比は、1.10:0.58:0.25:0.17であった。
正極活物質9を用いてコイン型電池を作製し、サイクル試験を実施した。1回目の放電容量、200回目の放電容量、放電容量維持率は、それぞれ150mAh/g、138mAh/g、92%であった。
また、実施例5~7のリチウム含有複合金属酸化物を正極活物質として用いたリチウム二次電池では、いずれも、比較例1および2のリチウム含有複合金属酸化物を正極活物質として用いたリチウム二次電池よりも高いサイクル特性を有することを示す。
1.リチウム含有複合金属酸化物10の製造
攪拌器およびオーバーフローパイプを備えた反応槽内に水を入れた後、水酸化ナトリウム水溶液を添加し、液温を50℃に保持した。
得られたリチウム含有複合金属酸化物10の組成分析を行ったところ、Li:Ni:Mn:Coのモル比は、1.07:0.55:0.24:0.21であった。
正極活物質10を用いてコイン型電池を作製し、サイクル試験を実施した。1回目の放電容量、200回目の放電容量、放電容量維持率は、それぞれ151mAh/g、143mAh/g、90%であった。
1.リチウム含有複合金属酸化物11の製造
攪拌器およびオーバーフローパイプを備えた反応槽内に水を入れた後、水酸化ナトリウム水溶液を添加し、液温を50℃に保持した。
得られたリチウム含有複合金属酸化物11の組成分析を行ったところ、Li:Ni:Mn:Coのモル比は、1.07:0.55:0.24:0.21であった。
正極活物質11を用いてコイン型電池を作製し、サイクル試験を実施した。1回目の放電容量、200回目の放電容量、放電容量維持率は、それぞれ147mAh/g、131mAh/g、89%であった。
また、実施例8および9のリチウム含有複合金属酸化物を正極活物質として用いたリチウム二次電池では、いずれも、比較例1および2のリチウム含有複合金属酸化物を正極活物質として用いたリチウム二次電池よりも高いサイクル特性を有することを示す。
2 正極
3 負極
4 電極群
5 電池缶
6 電解液
7 トップインシュレーター
8 封口体
10 リチウム二次電池
21 正極リード
31 負極リード
Claims (10)
- 少なくともニッケル、コバルト及びマンガンを含み、層状構造を有するリチウム二次電池用正極活物質であって、下記要件(1)~(3)を満たすリチウム二次電池用正極活物質。
(1)一次粒子径が0.1μm以上1μm以下であり、50%累積体積粒度D50が1μm以上10μm以下
(2)90%累積体積粒度D90と10%累積体積粒度D10との比率D90/D10が2以上6以下
(3)中和滴定により測定された粒子表面の残存アルカリに含まれる炭酸リチウム量が0.1質量%以上0.8質量%以下 - CuKα線を使用した粉末X線回折測定での2θ=18.7±1°の範囲内のピークにおける結晶子サイズα(Å)とBET比表面積β(m2/g)との関係式(α/β)/1000の値が0.5以上2.3以下である請求項1記載のリチウム二次電池用正極活物質。
- BET比表面積が0.1m2/g以上2.0m2/g以下である請求項1または2記載のリチウム二次電池用正極活物質。
- CuKα線を使用した粉末X線回折測定において、2θ=18.7±1°の範囲内のピークにおける結晶子サイズが600Å以上1400Å以下である請求項1~3いずれか1項に記載のリチウム二次電池用正極活物質。
- 中和滴定により測定された粒子表面の残存アルカリに含まれる炭酸リチウム量と水酸化リチウム量の和が0.2質量%以上1.5質量%以下である請求項1~4いずれか1項に記載のリチウム二次電池用正極活物質。
- 10%累積体積粒度D10、50%累積体積粒度D50と90%累積体積粒度D90との関係式(D90-D10)/D50が1.00以上2.20以下である請求項1~5いずれか1項に記載のリチウム二次電池用正極活物質。
- 6.37kN/cm2加圧時の粉体導電率が1×10-3S/cm以上1×10-1S/cm以下である請求項1~6いずれか1項に記載のリチウム二次電池用正極活物質。
- 以下組成式(I)で表される請求項1~7のいずれか1項に記載のリチウム二次電池用正極活物質。
LiaNi1-x-y-zCoxMnyMzO2 ・・・(I)
(ここで、0.9≦a≦1.2、0<x<0.4、0<y<0.4、0≦z<0.1、0.5<1-x-y-z≦0.65、Mは、Mg、Al、Zrの内いずれか1種以上の金属である。) - 請求項1~8のいずれか1項に記載のリチウム二次電池用正極活物質を有するリチウム二次電池用正極。
- 請求項9に記載のリチウム二次電池用正極を有するリチウム二次電池。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/314,317 US10938019B2 (en) | 2014-05-29 | 2015-05-27 | Positive electrode active material for lithium secondary batteries, positive electrode for lithium secondary batteries, and lithium secondary battery |
| CN201580027925.8A CN106463721B (zh) | 2014-05-29 | 2015-05-27 | 锂二次电池用正极活性物质、锂二次电池用正极及锂二次电池 |
| JP2016523536A JP6549565B2 (ja) | 2014-05-29 | 2015-05-27 | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| KR1020167032925A KR102379798B1 (ko) | 2014-05-29 | 2015-05-27 | 리튬 이차 전지용 정극 활물질, 리튬 이차 전지용 정극 및 리튬 이차 전지 |
| EP15800391.3A EP3151316B1 (en) | 2014-05-29 | 2015-05-27 | Positive electrode active material for lithium secondary batteries, positive electrode for lithium secondary batteries, and lithium secondary battery |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-111713 | 2014-05-29 | ||
| JP2014111713 | 2014-05-29 | ||
| JP2014262692 | 2014-12-25 | ||
| JP2014-262692 | 2014-12-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015182665A1 true WO2015182665A1 (ja) | 2015-12-03 |
Family
ID=54698988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2015/065269 Ceased WO2015182665A1 (ja) | 2014-05-29 | 2015-05-27 | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US10938019B2 (ja) |
| EP (1) | EP3151316B1 (ja) |
| JP (1) | JP6549565B2 (ja) |
| KR (1) | KR102379798B1 (ja) |
| CN (1) | CN106463721B (ja) |
| WO (1) | WO2015182665A1 (ja) |
Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016060105A1 (ja) * | 2014-10-15 | 2016-04-21 | 住友化学株式会社 | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| WO2016133042A1 (ja) * | 2015-02-17 | 2016-08-25 | 戸田工業株式会社 | 非水電解質二次電池用正極活物質、非水電解質二次電池 |
| EP3225592A1 (en) * | 2016-03-31 | 2017-10-04 | Honda Motor Co., Ltd. | Positive electrode active material for nonaqueous electrolyte secondary battery |
| JP2017188443A (ja) * | 2016-03-31 | 2017-10-12 | 日亜化学工業株式会社 | 非水系電解質二次電池用正極活物質の製造方法 |
| JP2017188444A (ja) * | 2016-03-31 | 2017-10-12 | 日亜化学工業株式会社 | 非水系電解質二次電池用正極活物質の製造方法 |
| CN107275573A (zh) * | 2016-03-31 | 2017-10-20 | 本田技研工业株式会社 | 非水电解质二次电池用正极活性物质 |
| JP2018018789A (ja) * | 2016-07-29 | 2018-02-01 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極活物質とその製造方法、及び非水系電解質二次電池 |
| WO2018110256A1 (ja) * | 2016-12-14 | 2018-06-21 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| JP2018095546A (ja) * | 2017-11-28 | 2018-06-21 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| JPWO2017126312A1 (ja) * | 2016-01-19 | 2018-06-28 | 日立金属株式会社 | リチウムイオン二次電池用正極活物質、その製造方法及びリチウムイオン二次電池 |
| JP2018106892A (ja) * | 2016-12-26 | 2018-07-05 | 住友化学株式会社 | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| JPWO2017138382A1 (ja) * | 2016-02-12 | 2018-12-06 | Necエナジーデバイス株式会社 | リチウムイオン二次電池用正極及びリチウムイオン二次電池、並びにリチウムイオン二次電池用正極の製造方法および評価方法 |
| JP2019003955A (ja) * | 2018-09-27 | 2019-01-10 | 住友化学株式会社 | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| JP2019506703A (ja) * | 2016-01-15 | 2019-03-07 | トダアメリカ・インク | ニッケル酸リチウム系正極活物質粒子粉末及びその製造方法、並びに非水電解質二次電池 |
| JP2019071216A (ja) * | 2017-10-10 | 2019-05-09 | トヨタ自動車株式会社 | 非水系二次電池 |
| KR20190070353A (ko) * | 2016-11-08 | 2019-06-20 | 혼다 기켄 고교 가부시키가이샤 | 비수계 전해질 2차 전지용 전극 및 이것을 구비하는 비수계 전해질 2차 전지 |
| JP2019160572A (ja) * | 2018-03-13 | 2019-09-19 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、正極及びリチウム二次電池 |
| EP3466889A4 (en) * | 2016-05-27 | 2019-11-13 | Umicore | METHOD FOR PRODUCING OXIDE POWDER FROM NICKEL LITHIUM COMPLEX WITH SMALL PARTICLE SIZE |
| WO2020130123A1 (ja) * | 2018-12-20 | 2020-06-25 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| WO2020152910A1 (ja) * | 2019-01-21 | 2020-07-30 | Jx金属株式会社 | 全固体リチウムイオン電池用酸化物系正極活物質、全固体リチウムイオン電池用酸化物系正極活物質の前駆体の製造方法、全固体リチウムイオン電池用酸化物系正極活物質の製造方法及び全固体リチウムイオン電池 |
| JP2020167145A (ja) * | 2020-01-17 | 2020-10-08 | 住友化学株式会社 | 全固体リチウムイオン電池用正極活物質、電極および全固体リチウムイオン電池 |
| WO2020202708A1 (ja) * | 2019-03-29 | 2020-10-08 | 住友化学株式会社 | 全固体リチウムイオン電池用正極活物質、電極及び全固体リチウムイオン電池 |
| US11011741B2 (en) | 2016-12-07 | 2021-05-18 | Sumitomo Chemical Company, Limited | Positive electrode active material for lithium secondary batteries, positive electrode for lithium secondary batteries, and lithium secondary battery |
| DE112020004097T5 (de) | 2019-08-26 | 2022-06-15 | Gs Yuasa International Ltd. | Positives aktivmaterial für nichtwässriger-elektrolyt-sekundärbatterie, verfahren zum herstellen eines positiven aktivmaterials für nichtwässriger-elektrolyt-sekundärbatterie, positive elektrode für nichtwässriger-elektrolyt-sekundärbatterie, nichtwässriger-elektrolyt-sekundärbatterie und energiespeichergerät |
| WO2023047974A1 (ja) | 2021-09-22 | 2023-03-30 | 株式会社プロテリアル | リチウムイオン二次電池用正極活物質およびリチウムイオン二次電池 |
| US11646414B2 (en) * | 2017-09-11 | 2023-05-09 | Tanaka Corporation | Positive electrode active material for alkaline storage battery, and method for producing positive electrode active material for alkaline storage battery |
| JP2023554657A (ja) * | 2021-02-05 | 2023-12-28 | エルジー エナジー ソリューション リミテッド | リチウム二次電池用正極活物質、その製造方法、及びそれを含むリチウム二次電池 |
| JP2024002626A (ja) * | 2022-06-24 | 2024-01-11 | プライムアースEvエナジー株式会社 | リチウムイオン二次電池用正極板及びリチウムイオン二次電池 |
Families Citing this family (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160061167A (ko) * | 2014-11-21 | 2016-05-31 | 삼성에스디아이 주식회사 | 무기물층이 코팅된 전극, 그 제조 방법 및 이를 구비한 이차 전지 |
| US11094966B2 (en) | 2017-03-02 | 2021-08-17 | Battelle Memorial Institute | High efficiency electrolytes for high voltage battery systems |
| JP6388978B1 (ja) * | 2017-03-31 | 2018-09-12 | 住友化学株式会社 | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| JP6805940B2 (ja) | 2017-04-03 | 2020-12-23 | トヨタ自動車株式会社 | リチウムイオン二次電池およびその製造方法 |
| JP6614202B2 (ja) * | 2017-06-01 | 2019-12-04 | 日亜化学工業株式会社 | 非水系電解質二次電池用正極活物質及びその製造方法 |
| CN109422297B (zh) * | 2017-08-28 | 2021-08-31 | 湖南杉杉能源科技股份有限公司 | 一种镍钴锰前驱体结晶过程中调控成核的方法 |
| CN111066183B (zh) * | 2017-09-11 | 2023-04-04 | 株式会社田中化学研究所 | 碱性蓄电池用正极活性物质 |
| US20200274159A1 (en) * | 2017-09-20 | 2020-08-27 | Basf Se | Process for making an electrode active material |
| CN107860864A (zh) * | 2017-09-21 | 2018-03-30 | 苏州宇量电池有限公司 | 三元正极材料总残留碱含量测定方法 |
| US11127980B2 (en) * | 2017-10-19 | 2021-09-21 | Battelle Memorial Institute | Localized superconcentrated electrolytes for silicon anodes |
| TWI650341B (zh) | 2017-11-06 | 2019-02-11 | 國立臺灣科技大學 | 寡聚物高分子與鋰電池 |
| JP2019160573A (ja) | 2018-03-13 | 2019-09-19 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、正極、及びリチウム二次電池 |
| JP6962838B2 (ja) * | 2018-03-13 | 2021-11-05 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、正極、及びリチウム二次電池 |
| JP6542421B1 (ja) | 2018-03-29 | 2019-07-10 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、リチウム二次電池用正極、及びリチウム二次電池 |
| WO2020003642A1 (ja) * | 2018-06-29 | 2020-01-02 | パナソニックIpマネジメント株式会社 | 非水電解質二次電池用正極活物質、及び非水電解質二次電池 |
| WO2020090801A1 (ja) * | 2018-10-30 | 2020-05-07 | 日本碍子株式会社 | コイン形リチウム二次電池 |
| JP6651604B1 (ja) * | 2018-12-20 | 2020-02-19 | 住友化学株式会社 | リチウム二次電池用正極活物質前駆体、リチウム二次電池用正極活物質前駆体の製造方法、及びリチウム二次電池用正極活物質の製造方法 |
| JP6630865B1 (ja) * | 2019-04-12 | 2020-01-15 | 住友化学株式会社 | リチウム複合金属酸化物粉末及びリチウム二次電池用正極活物質 |
| CN111422920A (zh) * | 2019-12-26 | 2020-07-17 | 蜂巢能源科技有限公司 | 锂离子电池的无钴正极材料及其制备方法和锂离子电池 |
| JP6734491B1 (ja) * | 2020-01-17 | 2020-08-05 | 住友化学株式会社 | 全固体リチウムイオン電池用正極活物質、電極及び全固体リチウムイオン電池 |
| JP6780140B1 (ja) * | 2020-01-17 | 2020-11-04 | 住友化学株式会社 | 全固体リチウムイオン電池用混合粉末、全固体リチウムイオン電池用混合ペースト、電極および全固体リチウムイオン電池 |
| JP6810287B1 (ja) * | 2020-01-17 | 2021-01-06 | 住友化学株式会社 | 全固体リチウムイオン電池用正極活物質、電極及び全固体リチウムイオン電池 |
| JP6705068B1 (ja) * | 2020-01-17 | 2020-06-03 | 住友化学株式会社 | 全固体リチウムイオン電池用正極活物質、電極および全固体リチウムイオン電池 |
| CN111948335B (zh) * | 2020-06-29 | 2021-08-24 | 北京当升材料科技股份有限公司 | 测试包覆改性的正极材料中残余碱含量的方法及其应用 |
| JP6964724B1 (ja) * | 2020-06-29 | 2021-11-10 | 住友化学株式会社 | リチウム二次電池正極活物質用前駆体及びリチウム二次電池正極活物質の製造方法 |
| JP7233402B2 (ja) * | 2020-07-06 | 2023-03-06 | 住友化学株式会社 | リチウム二次電池正極活物質用前駆体、リチウム金属複合酸化物、リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| CN112670492B (zh) * | 2020-12-23 | 2024-04-05 | 宁德新能源科技有限公司 | 正极材料及其制备方法以及电化学装置 |
| KR20230006167A (ko) * | 2021-07-02 | 2023-01-10 | 에스케이온 주식회사 | 이차전지용 전극 및 이를 포함하는 이차전지 |
| CN113666431A (zh) * | 2021-07-30 | 2021-11-19 | 蜂巢能源科技有限公司 | 高镍三元正极材料中残碱的去除方法、高镍三元正极材料及锂离子电池 |
| JP7544006B2 (ja) * | 2021-09-02 | 2024-09-03 | トヨタ自動車株式会社 | 正極活物質の製造方法、正極活物質およびリチウムイオン二次電池 |
| CN114590847A (zh) * | 2022-02-17 | 2022-06-07 | 湖南力合厚浦科技有限公司 | 三元正极前驱体材料及制备方法与三元正极材料 |
| CN114843476B (zh) * | 2022-05-20 | 2024-09-24 | 重庆镁储能科技有限公司 | 一种v3s4@c/g复合电极材料的制备方法及其应用 |
| EP4607609A4 (en) * | 2023-03-31 | 2025-12-31 | Contemporary Amperex Technology Hong Kong Ltd | ACTIVE POSITIVE ELECTRODE MATERIAL, POSITIVE POLAR PART, SECONDARY BATTERY AND ELECTRICAL DEVICE |
| KR102905741B1 (ko) * | 2023-05-30 | 2025-12-29 | (주)포스코퓨처엠 | 리튬 이차 전지용 양극 활물질, 이의 제조방법 및 이를 포함하는 리튬 이차 전지 |
| KR20250034230A (ko) * | 2023-09-01 | 2025-03-11 | (주)포스코퓨처엠 | 리튬 이차 전지용 양극 활물질 및 이의 제조방법 |
| JP2025112035A (ja) * | 2024-01-18 | 2025-07-31 | プライムプラネットエナジー&ソリューションズ株式会社 | 正極活物質および非水電解質二次電池 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004193115A (ja) * | 2002-11-27 | 2004-07-08 | Nichia Chem Ind Ltd | 非水電解質二次電池用正極活物質および非水電解質二次電池 |
| JP2007184145A (ja) * | 2006-01-06 | 2007-07-19 | Hitachi Vehicle Energy Ltd | リチウム二次電池 |
| JP2008147068A (ja) * | 2006-12-12 | 2008-06-26 | Ise Chemicals Corp | 非水電解液二次電池用リチウム複合酸化物 |
| EP2421077A1 (en) * | 2010-08-17 | 2012-02-22 | Umicore | Positive electrode materials combining high safety and high power in a Li rechargeable battery |
| WO2012131881A1 (ja) * | 2011-03-28 | 2012-10-04 | 住友金属鉱山株式会社 | ニッケルマンガン複合水酸化物粒子とその製造方法、非水系電解質二次電池用正極活物質とその製造方法、および非水系電解質二次電池 |
| JP2012201539A (ja) * | 2011-03-24 | 2012-10-22 | Agc Seimi Chemical Co Ltd | リチウム含有複合酸化物の製造方法 |
| WO2013069454A1 (ja) * | 2011-11-09 | 2013-05-16 | 株式会社Gsユアサ | 非水電解質二次電池用活物質、その活物質の製造方法、非水電解質二次電池用電極及び非水電解質二次電池 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020053663A1 (en) | 2000-11-06 | 2002-05-09 | Tanaka Chemical Corporation | High density cobalt-manganese coprecipitated nickel hydroxide and process for its production |
| JP2002201028A (ja) | 2000-11-06 | 2002-07-16 | Tanaka Chemical Corp | 高密度コバルトマンガン共沈水酸化ニッケル及びその製造法 |
| JP4325112B2 (ja) * | 2000-12-28 | 2009-09-02 | ソニー株式会社 | 正極活物質及び非水電解質二次電池 |
| JP4979432B2 (ja) | 2007-03-28 | 2012-07-18 | 三洋電機株式会社 | 円筒型リチウム二次電池 |
| WO2009099158A1 (ja) * | 2008-02-06 | 2009-08-13 | Agc Seimi Chemical Co., Ltd. | リチウムイオン二次電池正極活物質用の造粒体粉末の製造方法 |
| JP5490457B2 (ja) * | 2009-07-13 | 2014-05-14 | 日本化学工業株式会社 | リチウム二次電池用正極活物質、その製造方法及びリチウム二次電池 |
| US8871113B2 (en) | 2010-03-31 | 2014-10-28 | Samsung Sdi Co., Ltd. | Positive active material, and positive electrode and lithium battery including positive active material |
| JP5522844B2 (ja) | 2010-09-02 | 2014-06-18 | 日立マクセル株式会社 | 電気化学素子用電極およびリチウムイオン二次電池 |
| JP2012113823A (ja) * | 2010-11-19 | 2012-06-14 | Nippon Chem Ind Co Ltd | リチウム二次電池用正極活物質、その製造方法及びリチウム二次電池 |
| WO2012128288A1 (ja) | 2011-03-24 | 2012-09-27 | Jx日鉱日石金属株式会社 | リチウムイオン電池用正極活物質、リチウムイオン電池用正極、及び、リチウムイオン電池 |
| JP5903956B2 (ja) | 2012-03-15 | 2016-04-13 | 戸田工業株式会社 | 非水電解質二次電池用リチウム複合酸化物粒子粉末及びその製造方法、並びに非水電解質二次電池 |
| JP2014041710A (ja) | 2012-08-21 | 2014-03-06 | Nippon Chem Ind Co Ltd | リチウムイオン二次電池用正極活物質及びリチウムイオン二次電池 |
-
2015
- 2015-05-27 WO PCT/JP2015/065269 patent/WO2015182665A1/ja not_active Ceased
- 2015-05-27 EP EP15800391.3A patent/EP3151316B1/en active Active
- 2015-05-27 CN CN201580027925.8A patent/CN106463721B/zh active Active
- 2015-05-27 JP JP2016523536A patent/JP6549565B2/ja active Active
- 2015-05-27 US US15/314,317 patent/US10938019B2/en active Active
- 2015-05-27 KR KR1020167032925A patent/KR102379798B1/ko active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004193115A (ja) * | 2002-11-27 | 2004-07-08 | Nichia Chem Ind Ltd | 非水電解質二次電池用正極活物質および非水電解質二次電池 |
| JP2007184145A (ja) * | 2006-01-06 | 2007-07-19 | Hitachi Vehicle Energy Ltd | リチウム二次電池 |
| JP2008147068A (ja) * | 2006-12-12 | 2008-06-26 | Ise Chemicals Corp | 非水電解液二次電池用リチウム複合酸化物 |
| EP2421077A1 (en) * | 2010-08-17 | 2012-02-22 | Umicore | Positive electrode materials combining high safety and high power in a Li rechargeable battery |
| JP2012201539A (ja) * | 2011-03-24 | 2012-10-22 | Agc Seimi Chemical Co Ltd | リチウム含有複合酸化物の製造方法 |
| WO2012131881A1 (ja) * | 2011-03-28 | 2012-10-04 | 住友金属鉱山株式会社 | ニッケルマンガン複合水酸化物粒子とその製造方法、非水系電解質二次電池用正極活物質とその製造方法、および非水系電解質二次電池 |
| WO2013069454A1 (ja) * | 2011-11-09 | 2013-05-16 | 株式会社Gsユアサ | 非水電解質二次電池用活物質、その活物質の製造方法、非水電解質二次電池用電極及び非水電解質二次電池 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP3151316A4 * |
Cited By (68)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10535875B2 (en) | 2014-10-15 | 2020-01-14 | Sumitomo Chemical Company, Limited | Positive electrode active material for lithium secondary battery, positive electrode for lithium secondary battery, and lithium secondary battery |
| JPWO2016060105A1 (ja) * | 2014-10-15 | 2017-08-31 | 住友化学株式会社 | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| WO2016060105A1 (ja) * | 2014-10-15 | 2016-04-21 | 住友化学株式会社 | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| WO2016133042A1 (ja) * | 2015-02-17 | 2016-08-25 | 戸田工業株式会社 | 非水電解質二次電池用正極活物質、非水電解質二次電池 |
| US11492266B2 (en) | 2015-02-17 | 2022-11-08 | Toda Kogyo Corp. | Processes for preparing positive electrode active substance for non-aqueous electrolyte secondary batteries |
| JP7427156B2 (ja) | 2016-01-15 | 2024-02-05 | 戸田工業株式会社 | ニッケル酸リチウム系正極活物質粒子粉末及びその製造方法、並びに非水電解質二次電池 |
| JP2022003648A (ja) * | 2016-01-15 | 2022-01-11 | トダアメリカ・インク | ニッケル酸リチウム系正極活物質粒子粉末及びその製造方法、並びに非水電解質二次電池 |
| JP2019506703A (ja) * | 2016-01-15 | 2019-03-07 | トダアメリカ・インク | ニッケル酸リチウム系正極活物質粒子粉末及びその製造方法、並びに非水電解質二次電池 |
| US10749176B2 (en) | 2016-01-19 | 2020-08-18 | Hitachi Metals, Ltd. | Cathode active material used for lithium ion secondary battery, method for producing same, and lithium ion secondary battery |
| JPWO2017126312A1 (ja) * | 2016-01-19 | 2018-06-28 | 日立金属株式会社 | リチウムイオン二次電池用正極活物質、その製造方法及びリチウムイオン二次電池 |
| JPWO2017138382A1 (ja) * | 2016-02-12 | 2018-12-06 | Necエナジーデバイス株式会社 | リチウムイオン二次電池用正極及びリチウムイオン二次電池、並びにリチウムイオン二次電池用正極の製造方法および評価方法 |
| US11804600B2 (en) | 2016-03-31 | 2023-10-31 | Nichia Corporation | Positive electrode active material for nonaqueous electrolyte secondary battery |
| EP3225592A1 (en) * | 2016-03-31 | 2017-10-04 | Honda Motor Co., Ltd. | Positive electrode active material for nonaqueous electrolyte secondary battery |
| US12218351B2 (en) | 2016-03-31 | 2025-02-04 | Honda Motor Co., Ltd. | Positive electrode active material for nonaqueous electrolyte secondary battery |
| CN107275573A (zh) * | 2016-03-31 | 2017-10-20 | 本田技研工业株式会社 | 非水电解质二次电池用正极活性物质 |
| JP2025074138A (ja) * | 2016-03-31 | 2025-05-13 | 日亜化学工業株式会社 | 非水系電解質二次電池用正極活物質の製造方法 |
| JP2017188443A (ja) * | 2016-03-31 | 2017-10-12 | 日亜化学工業株式会社 | 非水系電解質二次電池用正極活物質の製造方法 |
| CN107275573B (zh) * | 2016-03-31 | 2019-06-07 | 本田技研工业株式会社 | 非水电解质二次电池用正极活性物质 |
| JP2017188444A (ja) * | 2016-03-31 | 2017-10-12 | 日亜化学工業株式会社 | 非水系電解質二次電池用正極活物質の製造方法 |
| US11380892B2 (en) | 2016-03-31 | 2022-07-05 | Nichia Corporation | Positive electrode active material for nonaqueous electrolyte secondary battery |
| JP7776791B2 (ja) | 2016-03-31 | 2025-11-27 | 日亜化学工業株式会社 | 非水系電解質二次電池用正極活物質の製造方法 |
| EP3594182A1 (en) * | 2016-03-31 | 2020-01-15 | Honda Motor Co., Ltd. | Positive electrode active material for nonaqueous electrolyte secondary battery |
| US10622629B2 (en) | 2016-03-31 | 2020-04-14 | Honda Motor Co., Ltd. | Positive electrode active material for nonaqueous electrolyte secondary battery |
| EP3466889A4 (en) * | 2016-05-27 | 2019-11-13 | Umicore | METHOD FOR PRODUCING OXIDE POWDER FROM NICKEL LITHIUM COMPLEX WITH SMALL PARTICLE SIZE |
| JP2018018789A (ja) * | 2016-07-29 | 2018-02-01 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極活物質とその製造方法、及び非水系電解質二次電池 |
| KR102462060B1 (ko) | 2016-11-08 | 2022-11-01 | 혼다 기켄 고교 가부시키가이샤 | 비수계 전해질 2차 전지용 전극 및 이것을 구비하는 비수계 전해질 2차 전지 |
| KR20220010584A (ko) * | 2016-11-08 | 2022-01-25 | 혼다 기켄 고교 가부시키가이샤 | 비수계 전해질 2차 전지용 전극 및 이것을 구비하는 비수계 전해질 2차 전지 |
| CN109923702A (zh) * | 2016-11-08 | 2019-06-21 | 本田技研工业株式会社 | 非水系电解质二次电池用电极及具备其的非水系电解质二次电池 |
| EP3540826A4 (en) * | 2016-11-08 | 2020-06-24 | Honda Motor Co., Ltd. | ELECTRODE FOR SECONDARY BATTERIES WITH WATER-FREE ELECTROLYTE AND SECONDARY BATTERY WITH WATER-FREE ELECTROLYTE THEREFOR |
| CN114551795A (zh) * | 2016-11-08 | 2022-05-27 | 本田技研工业株式会社 | 非水系电解质二次电池用电极及具备其的非水系电解质二次电池 |
| CN114520307B (zh) * | 2016-11-08 | 2025-03-04 | 本田技研工业株式会社 | 非水系电解质二次电池用电极及具备其的非水系电解质二次电池 |
| CN114551795B (zh) * | 2016-11-08 | 2025-02-11 | 本田技研工业株式会社 | 非水系电解质二次电池用电极及具备其的非水系电解质二次电池 |
| CN114520307A (zh) * | 2016-11-08 | 2022-05-20 | 本田技研工业株式会社 | 非水系电解质二次电池用电极及具备其的非水系电解质二次电池 |
| CN109923702B (zh) * | 2016-11-08 | 2022-03-11 | 本田技研工业株式会社 | 非水系电解质二次电池用电极及具备其的非水系电解质二次电池 |
| US11978885B2 (en) | 2016-11-08 | 2024-05-07 | Honda Motor Co., Ltd. | Electrode for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery provided with same |
| KR20190070353A (ko) * | 2016-11-08 | 2019-06-20 | 혼다 기켄 고교 가부시키가이샤 | 비수계 전해질 2차 전지용 전극 및 이것을 구비하는 비수계 전해질 2차 전지 |
| KR102352108B1 (ko) | 2016-11-08 | 2022-01-18 | 혼다 기켄 고교 가부시키가이샤 | 비수계 전해질 2차 전지용 전극 및 이것을 구비하는 비수계 전해질 2차 전지 |
| KR102235758B1 (ko) | 2016-11-08 | 2021-04-05 | 혼다 기켄 고교 가부시키가이샤 | 비수계 전해질 2차 전지용 전극 및 이것을 구비하는 비수계 전해질 2차 전지 |
| KR20210037753A (ko) * | 2016-11-08 | 2021-04-06 | 혼다 기켄 고교 가부시키가이샤 | 비수계 전해질 2차 전지용 전극 및 이것을 구비하는 비수계 전해질 2차 전지 |
| US11165051B2 (en) | 2016-11-08 | 2021-11-02 | Honda Motor Co., Ltd. | Electrode for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery provided with same |
| US11011741B2 (en) | 2016-12-07 | 2021-05-18 | Sumitomo Chemical Company, Limited | Positive electrode active material for lithium secondary batteries, positive electrode for lithium secondary batteries, and lithium secondary battery |
| CN110072816A (zh) * | 2016-12-14 | 2019-07-30 | 住友化学株式会社 | 锂金属复合氧化物粉末、锂二次电池用正极活性物质、锂二次电池用正极和锂二次电池 |
| WO2018110256A1 (ja) * | 2016-12-14 | 2018-06-21 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| US11532814B2 (en) | 2016-12-26 | 2022-12-20 | Sumitomo Chemical Company, Limited | Lithium nickel cobalt composite oxide positive active material, positive electrode, and lithium secondary battery using the same |
| WO2018123817A1 (ja) * | 2016-12-26 | 2018-07-05 | 住友化学株式会社 | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| JP2018106892A (ja) * | 2016-12-26 | 2018-07-05 | 住友化学株式会社 | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| CN110192297A (zh) * | 2016-12-26 | 2019-08-30 | 住友化学株式会社 | 锂二次电池用正极活性物质、锂二次电池用正极和锂二次电池 |
| US11646414B2 (en) * | 2017-09-11 | 2023-05-09 | Tanaka Corporation | Positive electrode active material for alkaline storage battery, and method for producing positive electrode active material for alkaline storage battery |
| JP2019071216A (ja) * | 2017-10-10 | 2019-05-09 | トヨタ自動車株式会社 | 非水系二次電池 |
| JP2018095546A (ja) * | 2017-11-28 | 2018-06-21 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| CN111837267A (zh) * | 2018-03-13 | 2020-10-27 | 住友化学株式会社 | 锂金属复合氧化物粉末、锂二次电池用正极活性物质、正极以及锂二次电池 |
| JP6994990B2 (ja) | 2018-03-13 | 2022-01-14 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、正極及びリチウム二次電池 |
| JP2019160572A (ja) * | 2018-03-13 | 2019-09-19 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、正極及びリチウム二次電池 |
| WO2019177023A1 (ja) * | 2018-03-13 | 2019-09-19 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、正極及びリチウム二次電池 |
| JP2019003955A (ja) * | 2018-09-27 | 2019-01-10 | 住友化学株式会社 | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| WO2020130123A1 (ja) * | 2018-12-20 | 2020-06-25 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 |
| JP2020119679A (ja) * | 2019-01-21 | 2020-08-06 | Jx金属株式会社 | 全固体リチウムイオン電池用酸化物系正極活物質、全固体リチウムイオン電池用酸化物系正極活物質の製造方法及び全固体リチウムイオン電池 |
| WO2020152910A1 (ja) * | 2019-01-21 | 2020-07-30 | Jx金属株式会社 | 全固体リチウムイオン電池用酸化物系正極活物質、全固体リチウムイオン電池用酸化物系正極活物質の前駆体の製造方法、全固体リチウムイオン電池用酸化物系正極活物質の製造方法及び全固体リチウムイオン電池 |
| JP2020167042A (ja) * | 2019-03-29 | 2020-10-08 | 住友化学株式会社 | 全固体リチウムイオン電池用正極活物質、電極および全固体リチウムイオン電池 |
| WO2020202708A1 (ja) * | 2019-03-29 | 2020-10-08 | 住友化学株式会社 | 全固体リチウムイオン電池用正極活物質、電極及び全固体リチウムイオン電池 |
| DE112020004097T5 (de) | 2019-08-26 | 2022-06-15 | Gs Yuasa International Ltd. | Positives aktivmaterial für nichtwässriger-elektrolyt-sekundärbatterie, verfahren zum herstellen eines positiven aktivmaterials für nichtwässriger-elektrolyt-sekundärbatterie, positive elektrode für nichtwässriger-elektrolyt-sekundärbatterie, nichtwässriger-elektrolyt-sekundärbatterie und energiespeichergerät |
| US12191487B2 (en) | 2019-08-26 | 2025-01-07 | Gs Yuasa International Ltd. | Positive active material for nonaqueous electrolyte secondary battery, method for producing positive active material for nonaqueous electrolyte secondary battery, positive electrode for nonaqueous electrolyte secondary battery, nonaqueous electrolyte secondary battery, and energy storage apparatus |
| JP2020167145A (ja) * | 2020-01-17 | 2020-10-08 | 住友化学株式会社 | 全固体リチウムイオン電池用正極活物質、電極および全固体リチウムイオン電池 |
| JP7194703B2 (ja) | 2020-01-17 | 2022-12-22 | 住友化学株式会社 | 全固体リチウムイオン電池用正極活物質、電極および全固体リチウムイオン電池 |
| JP2023554657A (ja) * | 2021-02-05 | 2023-12-28 | エルジー エナジー ソリューション リミテッド | リチウム二次電池用正極活物質、その製造方法、及びそれを含むリチウム二次電池 |
| WO2023047974A1 (ja) | 2021-09-22 | 2023-03-30 | 株式会社プロテリアル | リチウムイオン二次電池用正極活物質およびリチウムイオン二次電池 |
| JP7581285B2 (ja) | 2022-06-24 | 2024-11-12 | トヨタバッテリー株式会社 | リチウムイオン二次電池用正極板及びリチウムイオン二次電池 |
| JP2024002626A (ja) * | 2022-06-24 | 2024-01-11 | プライムアースEvエナジー株式会社 | リチウムイオン二次電池用正極板及びリチウムイオン二次電池 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2015182665A1 (ja) | 2017-04-20 |
| US10938019B2 (en) | 2021-03-02 |
| US20170187031A1 (en) | 2017-06-29 |
| CN106463721A (zh) | 2017-02-22 |
| EP3151316A1 (en) | 2017-04-05 |
| EP3151316B1 (en) | 2023-11-29 |
| CN106463721B (zh) | 2020-03-03 |
| KR20170009876A (ko) | 2017-01-25 |
| JP6549565B2 (ja) | 2019-07-24 |
| KR102379798B1 (ko) | 2022-03-28 |
| EP3151316A4 (en) | 2018-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6412094B2 (ja) | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 | |
| JP6549565B2 (ja) | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 | |
| JP6108141B2 (ja) | リチウム二次電池用正極活物質、リチウム二次電池用正極、及びリチウム二次電池 | |
| JP6026679B2 (ja) | リチウム二次電池用正極活物質、リチウム二次電池用正極、及びリチウム二次電池 | |
| US10535875B2 (en) | Positive electrode active material for lithium secondary battery, positive electrode for lithium secondary battery, and lithium secondary battery | |
| JP6256956B1 (ja) | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 | |
| JP6337360B2 (ja) | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 | |
| JP6343753B2 (ja) | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 | |
| WO2019177032A1 (ja) | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、正極、及びリチウム二次電池 | |
| JP2019003955A (ja) | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 | |
| JP2018073686A (ja) | リチウム二次電池用正極活物質前駆体、リチウム二次電池用正極活物質の製造方法 | |
| JP6500001B2 (ja) | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 | |
| WO2017078136A1 (ja) | リチウム二次電池用正極活物質、リチウム二次電池用正極活物質の製造方法、リチウム二次電池用正極及びリチウム二次電池 | |
| WO2018181402A1 (ja) | リチウムニッケル複合酸化物の製造方法 | |
| WO2018181530A1 (ja) | リチウム金属複合酸化物の製造方法 | |
| WO2019177023A1 (ja) | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、正極及びリチウム二次電池 | |
| JP2018081937A (ja) | リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 | |
| JP6843732B2 (ja) | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、リチウム二次電池用正極及びリチウム二次電池 | |
| JP6360374B2 (ja) | リチウム含有複合金属酸化物の製造方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15800391 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2016523536 Country of ref document: JP Kind code of ref document: A |
|
| ENP | Entry into the national phase |
Ref document number: 20167032925 Country of ref document: KR Kind code of ref document: A |
|
| REEP | Request for entry into the european phase |
Ref document number: 2015800391 Country of ref document: EP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 15314317 Country of ref document: US Ref document number: 2015800391 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |