WO2021152979A1 - 固体電解質材料およびこれを用いた電池 - Google Patents
固体電解質材料およびこれを用いた電池 Download PDFInfo
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- WO2021152979A1 WO2021152979A1 PCT/JP2020/043705 JP2020043705W WO2021152979A1 WO 2021152979 A1 WO2021152979 A1 WO 2021152979A1 JP 2020043705 W JP2020043705 W JP 2020043705W WO 2021152979 A1 WO2021152979 A1 WO 2021152979A1
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- 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
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- 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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
- H01M10/0562—Solid materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/08—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances oxides
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- 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
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- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0068—Solid electrolytes inorganic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0068—Solid electrolytes inorganic
- H01M2300/008—Halides
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- 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
Definitions
- the present disclosure relates to a solid electrolyte material and a battery using the same.
- Patent Document 1 discloses an all-solid-state battery in which a sulfide solid electrolyte is used.
- Patent Document 2 discloses a solid electrolyte material represented by Li 6-3z Y z X 6 (where 0 ⁇ z ⁇ 2 is satisfied and X is Cl or Br).
- An object of the present disclosure is to provide a solid electrolyte material having a low melting point and high ionic conductivity.
- the solid electrolyte material of the present disclosure is composed of Li, Y, X, and O, where X is one selected from the group consisting of F, Cl, Br, and I, and O for Y.
- the molar ratio of is greater than 0.01 and less than 0.52.
- the present disclosure provides a solid electrolyte material having a low melting point and high ionic conductivity.
- FIG. 1 shows a cross-sectional view of the battery 1000 according to the second embodiment.
- FIG. 2 is a graph showing the X-ray diffraction pattern of the solid electrolyte material according to Examples 1 to 3 and Comparative Example 1.
- FIG. 3 shows a schematic view of a pressure forming die 300 used for evaluating the ionic conductivity of a solid electrolyte material.
- FIG. 4 is a graph showing a Core-Cole diagram of the impedance measurement results of the solid electrolyte material according to Example 1.
- FIG. 5 is a graph showing the initial discharge characteristics of the battery according to the first embodiment.
- FIG. 6 is a graph showing the results of thermal analysis according to Examples 1 to 3 and Comparative Example 1.
- FIG. 7 is a graph showing the X-ray diffraction patterns of the solid electrolyte materials according to Examples 4 to 6 and Comparative Examples 1 and 2.
- FIG. 8 is a graph showing a Core-Cole diagram of the impedance measurement results of the solid electrolyte material according to Example 4.
- FIG. 9 is a graph showing the initial discharge characteristics of the battery according to the fourth embodiment.
- FIG. 10 is a graph showing the results of thermal analysis according to Examples 4 to 6 and Comparative Examples 1 and 2.
- the solid electrolyte material according to the first embodiment is composed of Li, Y, X, and O.
- X is one selected from the group consisting of F, Cl, Br, and I.
- the molar ratio of O to Y is greater than 0.01 and less than 0.52.
- the solid electrolyte material according to the first embodiment has a low melting point.
- the solid electrolyte material according to the first embodiment has high lithium ion conductivity.
- the low melting point is, for example, 504 ° C. or lower. That is, the solid electrolyte material according to the first embodiment can have a melting point of, for example, 504 ° C. or lower.
- the melting point of the solid electrolyte material means the highest temperature among the melting points of the solid electrolyte material.
- the high lithium ion conductivity is, for example, 1 ⁇ 10 -5 S / cm or more. That is, the solid electrolyte material according to the first embodiment can have, for example, a melting point of 504 ° C. or lower and an ionic conductivity of 1 ⁇ 10 -5 S / cm or higher.
- the solid electrolyte material according to the first embodiment can be used to obtain an all-solid-state battery having excellent charge / discharge characteristics.
- the all-solid-state battery may be a primary battery or a secondary battery.
- the solid electrolyte material according to the first embodiment does not contain sulfur.
- the sulfur-free solid electrolyte material is excellent in safety because hydrogen sulfide is not generated even when exposed to the atmosphere.
- the sulfide solid electrolyte disclosed in Patent Document 1 can generate hydrogen sulfide when exposed to the atmosphere.
- the solid electrolyte material according to the first embodiment may consist only of Li, Y, X, and O.
- the solid electrolyte material according to the first embodiment is prepared as Mg, Ca, Zn, Sr, Ba, Al, Sc, Ga, Bi, La, Zr, Hf, Ta, and Nb. It may further include at least one selected from the group consisting of.
- the transition metal contained in the solid electrolyte material according to the present embodiment may be only Y, except for the element contained as an unavoidable impurity.
- X may be Cl.
- Such solid electrolyte materials have a low melting point and high ionic conductivity.
- first solid electrolyte material first solid electrolyte material
- second solid electrolyte material second solid electrolyte material
- the X-ray diffraction pattern of the first solid electrolyte material can be measured using Cu—K ⁇ rays.
- Such solid electrolyte materials have a low melting point and high ionic conductivity.
- the molar ratio of Li to Y is 2.2 or more and 2.56 or less, and the molar ratio of X to Y is 3.5 or more and 5.9 or less. May be good.
- the molar ratio of Li to Y is 2.49 or more and 2.56 or less, and the molar ratio of X to Y is 3.91 or more and 5.29 or less. You may.
- the molar ratio of O to Y may be, for example, 1.0 or less.
- the upper and lower limits of the molar ratio of O to Y can be defined by any combination chosen from the values 0.01, 0.04, 0.23, and 0.50.
- the molar ratio of O to Y may be greater than 0.01 and 0.50 or less.
- the molar ratio A of O to Y in the surface region of the second solid electrolyte material may be larger than the molar ratio B of O to Y in the entire second solid electrolyte material.
- Such solid electrolyte materials have a low melting point and high ionic conductivity.
- the value of the molar ratio A may be greater than twice the value of the molar ratio B.
- the surface region of the second solid electrolyte material means a region from the surface of the second solid electrolyte material to a depth of about 5 nm in the internal direction.
- the molar ratio A may be 2.50 or less.
- the X-ray diffraction pattern of the second solid electrolyte material can be measured using Cu-K ⁇ rays.
- Peaks may be present in the range of diffraction angles 2 ⁇ of ° or less, 40.3 ° or more and 41.4 ° or less, 48.2 ° or more and 49.3 ° or less, and 53.1 ° or more and 54.2 ° or less. ..
- Such solid electrolyte materials have a low melting point and high ionic conductivity.
- the molar ratio of O to Y in the entire second solid electrolyte material may be greater than 0.01 and less than or equal to 0.33.
- the shape of the solid electrolyte material according to the first embodiment is not limited. Examples of such shapes are needle-shaped, spherical, or elliptical spherical.
- the solid electrolyte material according to the first embodiment may be particles.
- the solid electrolyte material according to the first embodiment may be formed to have the shape of a pellet or a plate.
- the solid electrolyte material according to the first embodiment may have a median diameter of 0.1 ⁇ m or more and 100 ⁇ m or less. ..
- the median diameter means the particle size when the cumulative volume in the volume-based particle size distribution is equal to 50%.
- the volume-based particle size distribution can be measured by a laser diffraction measuring device or an image analyzer.
- the solid electrolyte material according to the first embodiment may have a median diameter smaller than that of the active material.
- the solid electrolyte material according to the first embodiment can be produced by the following method.
- a plurality of halides are mixed as raw material powder.
- YCl 3 raw material powder and LiCl raw material powder are mixed.
- the obtained mixed powder is calcined in an inert gas atmosphere in which the oxygen concentration and the water concentration are adjusted (for example, an argon atmosphere having a dew point of ⁇ 60 ° C. or lower).
- the firing temperature may be, for example, in the range of 200 ° C. or higher and 650 ° C. or lower.
- the obtained reaction product is allowed to stand in an atmosphere having a relatively high dew point (for example, an argon atmosphere having a dew point of ⁇ 30 ° C.).
- the reactants are then fired at a temperature above the melting point (eg, 550 ° C.), for example, in an inert gas atmosphere with adjusted oxygen and moisture concentrations (eg, an argon atmosphere with a dew point of ⁇ 60 ° C. or lower). Will be done.
- a temperature above the melting point O can be present throughout the material.
- the reactants are subjected to a temperature below the melting point (eg, 400 ° C.) in an inert gas atmosphere (eg, an argon atmosphere with a dew point of ⁇ 60 ° C. or lower) in which oxygen and water concentrations are adjusted. ) May be fired. Firing at a temperature lower than the melting point increases the proportion of O in the surface region of the solid electrolyte material.
- the raw material flour may be mixed in a pre-adjusted molar ratio so as to offset the compositional changes that may occur in the synthetic process.
- the amount of oxygen in the solid electrolyte material is determined by the selection of the raw material powder, the oxygen concentration in the atmosphere, the water concentration in the atmosphere, and the reaction time. In this way, the solid electrolyte material according to the first embodiment is obtained.
- the raw material powder may be an oxide and a halide.
- Y 2 O 3 , NH 4 Cl, and Li Cl may be used as the raw material powder.
- the oxygen constituting the solid electrolyte material according to the first embodiment is taken in from the above-mentioned atmosphere having a relatively high dew point.
- the battery according to the second embodiment includes a positive electrode, a negative electrode, and an electrolyte layer.
- the electrolyte layer is arranged between the positive electrode and the negative electrode.
- At least one selected from the group consisting of a positive electrode, an electrolyte layer, and a negative electrode contains the solid electrolyte material according to the first embodiment. Since the battery according to the second embodiment contains the solid electrolyte material according to the first embodiment, it has excellent charge / discharge characteristics.
- a solid electrolyte material having a low melting point is softer than a solid electrolyte material having a higher melting point. Therefore, the adhesion between the solid electrolyte materials or the interface between the solid electrolyte material and another material (for example, the active material) is improved. As a result, the battery resistance is reduced, so that the charge / discharge characteristics of the battery are improved. Further, even if the solid electrolyte material is sintered with another material (for example, an active material), it is possible to suppress the occurrence of side reactions.
- FIG. 1 shows a cross-sectional view of the battery 1000 according to the second embodiment.
- the battery 1000 includes a positive electrode 201, an electrolyte layer 202, and a negative electrode 203.
- the positive electrode 201 contains the positive electrode active material particles 204 and the solid electrolyte particles 100.
- the electrolyte layer 202 is arranged between the positive electrode 201 and the negative electrode 203.
- the electrolyte layer 202 contains an electrolyte material (for example, a solid electrolyte material).
- the negative electrode 203 contains negative electrode active material particles 205 and solid electrolyte particles 100.
- the solid electrolyte particle 100 is a particle made of the solid electrolyte material according to the first embodiment or a particle containing the solid electrolyte material according to the first embodiment as a main component.
- the particles containing the solid electrolyte material according to the first embodiment as the main component mean the particles in which the component contained most is the solid electrolyte material according to the first embodiment.
- the positive electrode 201 contains a material capable of occluding and releasing metal ions (for example, lithium ions).
- the material is, for example, a positive electrode active material (for example, positive electrode active material particles 204).
- positive electrode active materials are lithium-containing transition metal oxides, transition metal fluorides, polyanionic materials, fluorinated polyanionic materials, transition metal sulfides, transition metal oxyfluorides, transition metal oxysulfides, or transition metal oxynitrides.
- lithium-containing transition metal oxide LiNi 1-df Co d Al f O 2 (where, 0 ⁇ d, 0 ⁇ f , and 0 ⁇ (d + f) ⁇ 1) or LiCoO 2.
- the positive electrode active material particles 204 may have a median diameter of 0.1 ⁇ m or more. The good dispersion improves the charge / discharge characteristics of the battery 1000. In order to rapidly diffuse lithium in the positive electrode active material particles 204, the positive electrode active material particles 204 may have a median diameter of 100 ⁇ m or less. Due to the rapid diffusion of lithium, the battery 1000 can operate at high output. As described above, the positive electrode active material particles 204 may have a median diameter of 0.1 ⁇ m or more and 100 ⁇ m or less.
- the positive electrode active material particles 204 may have a median diameter larger than that of the solid electrolyte particles 100.
- the ratio of the volume of the positive electrode active material particle 204 to the total volume of the positive electrode active material particle 204 and the volume of the solid electrolyte particle 100 in the positive electrode 201 is 0.30 or more and 0. It may be .95 or less.
- the positive electrode 201 may have a thickness of 10 ⁇ m or more and 500 ⁇ m or less.
- the electrolyte layer 202 contains an electrolyte material.
- the electrolyte material may include the solid electrolyte material according to the first embodiment.
- the electrolyte layer 202 may be a solid electrolyte layer.
- the electrolyte layer 202 may be composed of only the solid electrolyte material according to the first embodiment. Alternatively, the electrolyte layer 202 may be composed only of a solid electrolyte material different from the solid electrolyte material according to the first embodiment.
- X' is at least one selected from the group consisting of F, Cl, Br, and I.
- the electrolyte layer 202 may contain not only the solid electrolyte material according to the first embodiment but also a solid electrolyte material different from the solid electrolyte material according to the first embodiment.
- the solid electrolyte material according to the first embodiment and the solid electrolyte material different from the solid electrolyte material according to the first embodiment may be uniformly dispersed.
- a layer made of the solid electrolyte material according to the first embodiment and a layer made of a solid electrolyte material different from the solid electrolyte material according to the first embodiment may be laminated along the stacking direction of the battery 1000.
- the electrolyte layer 202 may have a thickness of 1 ⁇ m or more and 100 ⁇ m or less in order to suppress a short circuit between the positive electrode 201 and the negative electrode 203 and increase the output of the battery 1000.
- the negative electrode 203 contains a material capable of occluding and releasing metal ions (for example, lithium ions).
- the material is, for example, a negative electrode active material (for example, negative electrode active material particles 205).
- Examples of negative electrode active materials are metal materials, carbon materials, oxides, nitrides, tin compounds, or silicon compounds.
- the metal material may be a simple substance metal or an alloy.
- Examples of metallic materials are lithium metals or lithium alloys.
- Examples of carbon materials are natural graphite, coke, developing carbon, carbon fibers, spheroidal carbon, artificial graphite, or amorphous carbon. From the point of view of capacitance density, a preferred example of the negative electrode active material is silicon (ie, Si), tin (ie, Sn), a silicon compound, or a tin compound.
- the negative electrode active material particles 205 may have a median diameter of 0.1 ⁇ m or more. The good dispersion improves the charge / discharge characteristics of the battery. In order to rapidly diffuse lithium in the negative electrode active material particles 205, the negative electrode active material particles 205 may have a median diameter of 100 ⁇ m or less. Due to the rapid diffusion of lithium, the battery can operate at high power. As described above, the negative electrode active material particles 205 may have a median diameter of 0.1 ⁇ m or more and 100 ⁇ m or less.
- the negative electrode active material particles 205 may have a median diameter larger than that of the solid electrolyte particles 100.
- the ratio of the volume of the negative electrode active material particles 205 to the total volume of the negative electrode active material particles 205 and the volume of the solid electrolyte particles 100 is 0.30 or more and 0. It may be .95 or less.
- the negative electrode 203 may have a thickness of 10 ⁇ m or more and 500 ⁇ m or less.
- At least one selected from the group consisting of the positive electrode 201, the electrolyte layer 202, and the negative electrode 203 to enhance ionic conductivity, chemical stability, and electrochemical stability is the solid electrolyte material according to the first embodiment. It may contain a solid electrolyte material different from that of.
- solid electrolyte material examples include a halide solid electrolyte, a sulfide solid electrolyte, an oxide solid electrolyte, or an organic polymer solid electrolyte.
- halide solid electrolyte Li 2 MgX '4, Li 2 FeX' 4, Li (Al, Ga, In) X '4, Li 3 (Al, Ga, In) X' 6, or LiI.
- X' is at least one selected from the group consisting of F, Cl, Br, and I.
- Examples of sulfide solid electrolytes are Li 2 SP 2 S 5 , Li 2 S-Si S 2 , Li 2 SB 2 S 3 , Li 2 S-GeS 2 , Li 3.25 Ge 0.25 P 0.75 S 4 , or It is Li 10 GeP 2 S 12 .
- a solid oxide electrolyte is (I) NASICON type solid electrolytes such as LiTi 2 (PO 4 ) 3 or elemental substituents thereof, (Ii) Perovskite-type solid electrolytes such as (LaLi) TiO 3, (Iii) Lithium-type solid electrolytes such as Li 14 ZnGe 4 O 16 , Li 4 SiO 4 , LiGeO 4, or elemental substituents thereof, (Iv) a garnet-type solid electrolyte such as Li 7 La 3 Zr 2 O 12 or an elemental substituent thereof, or (v) Li 3 PO 4 or an N-substituted product thereof.
- NASICON type solid electrolytes such as LiTi 2 (PO 4 ) 3 or elemental substituents thereof
- Perovskite-type solid electrolytes such as (LaLi) TiO 3
- Lithium-type solid electrolytes such as Li 14 ZnGe 4 O 16 , Li 4 SiO 4 , LiGe
- organic polymer solid electrolytes examples include polymer compounds and lithium salt compounds.
- the polymer compound may have an ethylene oxide structure. Since the polymer compound having an ethylene oxide structure can contain a large amount of lithium salts, the ionic conductivity can be further increased.
- lithium salt LiPF 6, LiBF 4, LiSbF 6, LiAsF 6, LiSO 3 CF 3, LiN (SO 2 CF 3) 2, LiN (SO 2 C 2 F 5) 2, LiN (SO 2 CF 3) (SO 2 C 4 F 9 ) or LiC (SO 2 CF 3 ) 3 .
- One lithium salt selected from these may be used alone. Alternatively, a mixture of two or more lithium salts selected from these may be used.
- At least one selected from the group consisting of the positive electrode 201, the electrolyte layer 202, and the negative electrode 203 is a non-aqueous electrolyte solution, a gel electrolyte, or a gel electrolyte for the purpose of facilitating the transfer of lithium ions and improving the output characteristics of the battery 1000. It may contain an ionic liquid.
- the non-aqueous electrolyte solution contains a non-aqueous solvent and a lithium salt dissolved in the non-aqueous solvent.
- non-aqueous solvents examples include cyclic carbonate solvents, chain carbonate solvents, cyclic ether solvents, chain ether solvents, cyclic ester solvents, chain ester solvents, or fluorine solvents.
- cyclic carbonate solvents are ethylene carbonate, propylene carbonate, or butylene carbonate.
- chain carbonate solvents are dimethyl carbonate, ethyl methyl carbonate, or diethyl carbonate.
- Examples of cyclic ether solvents are tetrahydrofuran, 1,4-dioxane, or 1,3-dioxolane.
- chain ether solvents are 1,2-dimethoxyethane or 1,2-diethoxyethane.
- An example of a cyclic ester solvent is ⁇ -butyrolactone.
- An example of a chain ester solvent is methyl acetate.
- fluorine solvents are fluoroethylene carbonate, methyl fluoropropionate, fluorobenzene, fluoroethyl methyl carbonate, or fluorodimethylene carbonate.
- non-aqueous solvent selected from these may be used alone. Alternatively, a mixture of two or more non-aqueous solvents selected from these may be used.
- lithium salt LiPF 6, LiBF 4, LiSbF 6, LiAsF 6, LiSO 3 CF 3, LiN (SO 2 CF 3) 2, LiN (SO 2 C 2 F 5) 2, LiN (SO 2 CF 3) (SO 2 C 4 F 9 ) or LiC (SO 2 CF 3 ) 3 .
- One lithium salt selected from these may be used alone. Alternatively, a mixture of two or more lithium salts selected from these may be used.
- the concentration of the lithium salt is, for example, in the range of 0.5 mol / liter or more and 2 mol / liter or less.
- a polymer material impregnated with a non-aqueous electrolyte solution can be used.
- polymer materials are polyethylene oxide, polyacrylonitrile, polyvinylidene fluoride, polymethylmethacrylate, or polymers with ethylene oxide bonds.
- cations contained in ionic liquids are (I) Aliphatic chain quaternary salts such as tetraalkylammonium or tetraalkylphosphonium, (Ii) Aliphatic cyclic ammonium such as pyrrolidiniums, morpholiniums, imidazoliniums, tetrahydropyrimidiniums, piperaziniums, or piperidiniums, or (iii) nitrogen-containing heteros such as pyridiniums or imidazoliums. It is a ring aromatic cation.
- anion contained in the ionic liquid PF 6 -, BF 4 - , SbF 6 -, AsF 6 -, SO 3 CF 3 -, N (SO 2 CF 3) 2 -, N (SO 2 C 2 F 5 ) 2 -, N (SO 2 CF 3) (SO 2 C 4 F 9) -, or C (SO 2 CF 3) 3 - a.
- the ionic liquid may contain a lithium salt.
- At least one selected from the group consisting of the positive electrode 201, the electrolyte layer 202, and the negative electrode 203 may contain a binder for the purpose of improving the adhesion between the particles.
- binders are polyvinylidene fluoride, polytetrafluoroethylene, polyethylene, polypropylene, aramid resin, polyamide, polyimide, polyamideimide, polyacrylic nitrile, polyacrylic acid, polyacrylic acid methyl ester, polyacrylic acid ethyl ester, Polyacrylic acid hexyl ester, polymethacrylic acid, polymethacrylic acid methyl ester, polymethacrylic acid ethyl ester, polymethacrylic acid hexyl ester, polyvinyl acetate, polyvinylpyrrolidone, polyether, polyether sulfone, hexafluoropolypropylene, styrene butadiene rubber , Or carboxymethyl cellulose.
- Copolymers can also be used as binders.
- binders are tetrafluoroethylene, hexafluoroethylene, hexafluoropropylene, perfluoroalkyl vinyl ether, vinylidene fluoride, chlorotrifluoroethylene, ethylene, propylene, pentafluoropropylene, fluoromethyl vinyl ether, acrylic acid.
- a copolymer of two or more materials selected from the group consisting of hexadiene A mixture of two or more selected from these may be used as a binder.
- At least one selected from the positive electrode 201 and the negative electrode 203 may contain a conductive auxiliary agent in order to enhance electron conductivity.
- a conductive aid is (I) Graphites such as natural graphite or artificial graphite, (Ii) Carbon blacks such as acetylene black or ketjen black, (Iii) Conductive fibers such as carbon fibers or metal fibers, (Iv) Carbon fluoride, (V) Metal powders such as aluminum, (Vi) Conductive whiskers, such as zinc oxide or potassium titanate, It is a conductive metal oxide such as (vii) titanium oxide, or a conductive polymer compound such as (vii) polyaniline, polypyrrole, or polythiophene. In order to reduce the cost, the conductive auxiliary agent (i) or (ii) described above may be used.
- Examples of the shape of the battery according to the second embodiment are coin type, cylindrical type, square type, sheet type, button type, flat type, or laminated type.
- a material for forming a positive electrode, a material for forming an electrolyte layer, and a material for forming a negative electrode are prepared, and the positive electrode, the electrolyte layer, and the negative electrode are arranged in this order by a known method. It may be manufactured by producing the laminated body.
- Example 1 Preparation of solid electrolyte material
- dry argon atmosphere having a dew point of -60 ° C. or lower and an oxygen concentration of 0.0001% by volume or less
- YCl 3 and LiCl As raw material powders are 1: 3, YCl 3 : LiCl. It was prepared to have a molar ratio.
- These raw material powders were crushed and mixed in a mortar.
- the resulting mixture was calcined in an alumina crucible at 550 ° C. for 1 hour and then pulverized in a mortar.
- the resulting reaction was allowed to stand for about 10 minutes in an argon atmosphere with a dew point of ⁇ 30 ° C.
- the mass ratio of O to the entire solid electrolyte material according to Example 1 was measured by a non-dispersive infrared absorption method using an oxygen / nitrogen / hydrogen analyzer (manufactured by Horiba Seisakusho, EMGA-930). As a result, the mass ratio of O was 0.22%. Based on this, the Y: O molar ratio was calculated. As a result, the solid electrolyte material according to Example 1 had a Y: O molar ratio of 1.00: 0.04.
- FIG. 6 is a graph showing the results of thermal analysis of the solid electrolyte material according to Example 1.
- FIG. 2 is a graph showing an X-ray diffraction pattern of the solid electrolyte material according to Example 1.
- FIG. 3 shows a schematic view of the pressure forming die 300 used for evaluating the ionic conductivity of the solid electrolyte material.
- the pressure forming die 300 included a punch upper part 301, a frame type 302, and a punch lower part 303.
- the frame 302 was made of insulating polycarbonate.
- Both the upper punch 301 and the lower punch 303 were made of electron-conducting stainless steel.
- the ionic conductivity of the solid electrolyte material according to Example 1 was measured by the following method.
- the powder 101 of the solid electrolyte material according to Example 1 was filled inside the pressure forming die 300. Inside the pressure forming die 300, a pressure of 400 MPa was applied to the solid electrolyte material according to Example 1 using the upper punch 301 and the lower punch 303.
- the upper punch 301 and the lower punch 303 were connected to the potentiostat (Princeton Applied Research, VersaSTAT4).
- the upper part 301 of the punch was connected to the working electrode and the terminal for measuring the potential.
- the lower punch 303 was connected to the counter electrode and the reference electrode.
- the impedance of the solid electrolyte material according to Example 1 was measured at room temperature by an electrochemical impedance measurement method.
- FIG. 4 is a graph showing a Core-Cole diagram of the impedance measurement results of the solid electrolyte material according to Example 1.
- ⁇ is the ionic conductivity.
- S is the contact area of the solid electrolyte material with the punch upper portion 303 (in FIG. 3, it is equal to the cross-sectional area of the hollow portion of the frame mold 301).
- R SE is the resistance value of the solid electrolyte material in impedance measurement.
- t is the thickness of the solid electrolyte material to which the pressure is applied (in FIG. 3, equal to the thickness of the layer formed from the powder 101 of the solid electrolyte material).
- the ionic conductivity of the solid electrolyte material according to Example 1 measured at 25 ° C. was 2.4 ⁇ 10 -4 S / cm.
- the solid electrolyte layer had a thickness of 500 ⁇ m.
- the metal In foil was laminated on the solid electrolyte layer.
- the solid electrolyte layer was sandwiched between the metal In foil and the first electrode.
- the metal In foil had a thickness of 200 ⁇ m.
- a pressure of 80 MPa was applied to the metal In foil to form a second electrode.
- a current collector made of stainless steel was attached to the first and second electrodes, and then a current collector lead was attached to the current collector. Finally, an insulating ferrule was used to shield the inside of the insulating cylinder from the outside air atmosphere and seal the inside of the cylinder. In this way, the battery according to Example 1 was obtained.
- FIG. 5 is a graph showing the initial discharge characteristics of the battery according to the first embodiment. The results shown in FIG. 5 were measured by the following methods.
- the battery according to Example 1 was placed in a constant temperature bath at 25 ° C.
- the batteries according to Example 1 were charged until a voltage of 3.7 V was reached at a current density of 86 ⁇ A / cm 2.
- the current density corresponds to a 0.05 C rate.
- the battery according to Example 1 was discharged until a voltage of 1.9 V was reached at a current density of 86 ⁇ A / cm 2.
- the battery according to Example 1 had an initial discharge capacity of 536 ⁇ Ah.
- Example 2 The solid electrolyte material according to Example 2 was obtained in the same manner as in Example 1 except that the reaction product was allowed to stand for 30 minutes instead of about 10 minutes in an atmosphere having a dew point of ⁇ 30 ° C. Was done.
- the solid electrolyte material according to Example 3 was obtained in the same manner as in Example 1 except that the reaction product was allowed to stand for 9 hours instead of about 10 minutes in an atmosphere having a dew point of ⁇ 30 ° C. Was done.
- Example 2 In the same manner as in Example 1, the element ratio (molar ratio), melting point, oxygen content, X-ray diffraction and ionic conductivity of the solid electrolyte material according to Examples 2 and 3 were measured. The measurement results are shown in Tables 1 and 2. Further, FIG. 2 is a graph showing an X-ray diffraction pattern of the solid electrolyte material according to Examples 2 and 3. FIG. 6 is a graph showing the results of thermal analysis of the solid electrolyte material according to Examples 2 and 3.
- Example 2 Using the solid electrolyte material according to Examples 2 and 3, the batteries according to Examples 2 and 3 were obtained in the same manner as in Example 1.
- a charge / discharge test was carried out in the same manner as in Example 1 using the batteries according to Examples 2 and 3.
- the batteries according to Examples 2 and 3 were well charged and discharged, as were the batteries according to Example 1.
- Example 2 the element ratio (molar ratio), melting point, oxygen content, X-ray diffraction and ionic conductivity of the solid electrolyte material according to Comparative Example 1 were measured. The measurement results are shown in Tables 1 and 2. Further, FIG. 2 is a graph showing an X-ray diffraction pattern of the solid electrolyte material according to Comparative Example 1. FIG. 6 is a graph showing the results of thermal analysis of the solid electrolyte material according to Comparative Example 1.
- the solid electrolyte materials according to Examples 1 to 3 have a lower melting point than the solid electrolyte materials according to Comparative Example 1. Further, the solid electrolyte materials according to Examples 1 to 3 have a high ionic conductivity of 1 ⁇ 10 -5 S / cm or more in the vicinity of room temperature.
- the batteries according to Examples 1 to 3 were charged and discharged at 25 ° C.
- Example 4 [Preparation of solid electrolyte material]
- YCl 3 and LiCl as raw material powders were prepared so as to have a YCl 3 : LiCl molar ratio of 1: 3.
- These raw material powders were crushed and mixed in a mortar.
- the resulting mixture was calcined in an alumina crucible at 550 ° C. for 1 hour and then pulverized in a mortar.
- the resulting reaction was allowed to stand for about 10 minutes in an argon atmosphere with a dew point of ⁇ 30 ° C. and an oxygen concentration of 20.9% by volume. Further, it was calcined at 400 ° C. for 1 hour in a dry argon atmosphere and then pulverized in a mortar. In this way, the solid electrolyte material according to Example 4 was obtained.
- Example 4 In the same manner as in Example 1, the mass ratio of O to the entire solid electrolyte material according to Example 4 was measured. As a result, the mass ratio of O was 0.29%. Based on this, the Y: O molar ratio was calculated. As a result, the solid electrolyte material according to Example 4 had a Y: O molar ratio of 1.00: 0.06.
- the molar ratio of O to Y in the surface region of the solid electrolyte material according to Example 4 was measured by X-ray photoelectron spectroscopy using a scanning X-ray photoelectron spectroscopy analyzer (PHI Quantera SXM, manufactured by ULVAC-PHI). .. Al-K ⁇ rays were used as the X-ray source.
- the solid electrolyte material according to Example 4 had a Y: O molar ratio of 1.00: 0.15 in the surface region.
- the surface region in the present disclosure means a region measured in this way.
- the thickness of the surface region of the solid electrolyte material according to Example 4 was about 5 nm in the internal direction from the surface of the solid electrolyte material.
- FIG. 10 is a graph showing the results of thermal analysis of the solid electrolyte material according to Example 4.
- FIG. 7 is a graph showing an X-ray diffraction pattern of the solid electrolyte material according to Example 4.
- FIG. 9 is a graph showing the initial discharge characteristics of the battery according to the fourth embodiment. The results shown in FIG. 9 were measured by the following methods.
- the battery according to Example 4 was placed in a constant temperature bath at 25 ° C.
- the batteries according to Example 7 were charged with a current density of 83 ⁇ A / cm 2 until a voltage of 3.7 V was reached.
- the current density corresponds to a 0.05 C rate.
- the battery according to Example 4 was discharged until a voltage of 1.9 V was reached at a current density of 83 ⁇ A / cm 2.
- the battery according to Example 4 had an initial discharge capacity of 642 ⁇ Ah.
- Example 5 The solid electrolyte material according to Example 5 was obtained in the same manner as in Example 4 except that the reaction product was allowed to stand for 30 minutes instead of about 10 minutes in an atmosphere having a dew point of ⁇ 30 ° C. Was done.
- the solid electrolyte material according to Example 6 was obtained in the same manner as in Example 4 except that the reaction product was allowed to stand for 2 hours instead of about 10 minutes in an atmosphere having a dew point of ⁇ 30 ° C. Was done.
- Example 4 In the same manner as in Example 4, the element ratio (molar ratio), melting point, oxygen content, X-ray diffraction and ionic conductivity of the solid electrolyte material according to Examples 5 and 6 were measured. The measurement results are shown in Tables 3 and 4. Further, FIG. 7 is a graph showing an X-ray diffraction pattern of the solid electrolyte material according to Examples 5 and 6. FIG. 10 is a graph showing the results of thermal analysis of the solid electrolyte material according to Examples 5 and 6.
- a charge / discharge test was carried out in the same manner as in Example 4 using the batteries according to Examples 5 and 6.
- the batteries according to Examples 5 and 6 were well charged and discharged, as were the batteries according to Example 4.
- Comparative Example 2 The solid electrolyte material according to Comparative Example 2 was obtained in the same manner as in Example 7 except that the reaction product was allowed to stand for 9 hours instead of about 10 minutes in an atmosphere having a dew point of ⁇ 30 ° C. Was done.
- Example 7 In the same manner as in Example 7, the element ratio (molar ratio), melting point, oxygen content, X-ray diffraction and ionic conductivity of the solid electrolyte material according to Comparative Examples 1 and 2 were measured. The measurement results are shown in Tables 3 and 4. Further, FIG. 7 is a graph showing an X-ray diffraction pattern of the solid electrolyte material according to Comparative Examples 1 and 2. FIG. 10 is a graph showing the results of thermal analysis of the solid electrolyte material according to Comparative Examples 1 and 2.
- a charge / discharge test was carried out in the same manner as in Example 4 using the battery according to Comparative Example 2, but the initial discharge capacity was 1 mAh or less.
- the battery according to Comparative Example 2 was neither charged nor discharged.
- the solid electrolyte materials according to Examples 4 to 6 have a lower melting point than the solid electrolyte materials according to Comparative Example 1. Further, the solid electrolyte materials according to Examples 4 to 6 have a high ionic conductivity of 1 ⁇ 10 -5 S / cm or more in the vicinity of room temperature. On the other hand, the solid electrolyte material according to Comparative Example 2 has an ionic conductivity of less than 1 ⁇ 10 -5 S / cm.
- the solid electrolyte material has a low melting point and high ionic conductivity.
- the batteries according to Examples 4 to 6 were charged and discharged at 25 ° C.
- the solid electrolyte material according to the present disclosure has a low melting point and high lithium ion conductivity, and is suitable for providing a battery that can be charged and discharged well.
- the solid electrolyte material of the present disclosure is used, for example, in an all-solid-state lithium-ion secondary battery.
- Solid electrolyte particles 101 Solid electrolyte material powder 201 Positive electrode 202 Electrode layer 203 Negative electrode 204 Positive electrode active material particles 205 Negative electrode active material particles 300 Pressurized die 301 Punch upper 302 Frame type 303 Punch lower 1000 Battery
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Abstract
Description
第1実施形態による固体電解質材料は、Li、Y、X、およびOから構成される。ここで、Xは、F、Cl、Br、およびIからなる群より選択される1つである。Yに対するOのモル比は、0.01より大きく、かつ0.52未満である。第1実施形態による固体電解質材料は、低い融点を有する。さらに、第1実施形態による固体電解質材料は、高いリチウムイオン伝導度を有する。ここで、低い融点とは、例えば504℃以下である。すなわち、第1実施形態による固体電解質材料は、例えば504℃以下の融点を有し得る。固体電解質材料が多相材料である場合、固体電解質材料の融点とは、当該固体電解質材料が有する融点のうち、最も高い温度を意味する。また、高いリチウムイオン伝導度とは、例えば1×10-5S/cm以上である。すなわち、第1実施形態による固体電解質材料は、例えば504℃以下の融点および1×10-5S/cm以上のイオン伝導度を有し得る。
第1固体電解質材料のX線回折パターンは、Cu-Kα線を用いて測定され得る。得られたX線回折パターンにおいて、15.2°以上16.4°以下、16.7°以上18.6°以下、30.8°以上31.9°以下、33.2°以上34.3°以下、40.3°以上41.4°以下、48.2°以上49.3°以下、および53.0°以上54.2°以下の回折角2θの範囲にピークが存在してもよい。このような固体電解質材料は、低い融点および高いイオン伝導度を有する。
第2固体電解質材料の表面領域におけるYに対するOのモル比Aは、第2固体電解質材料の全体におけるYに対するOのモル比Bより大きくてもよい。このような固体電解質材料は、低い融点および高いイオン伝導度を有する。一例として、モル比Aの値は、モル比Bの値の2倍より大きくてもよい。
第1実施形態による固体電解質材料は、下記の方法により製造され得る。
以下、第2実施形態が説明される。第1実施形態において説明された事項は、省略され得る。
(i)LiTi2(PO4)3またはその元素置換体のようなNASICON型固体電解質、
(ii)(LaLi)TiO3のようなペロブスカイト型固体電解質、
(iii)Li14ZnGe4O16、Li4SiO4、LiGeO4、またはその元素置換体のようなLISICON型固体電解質、
(iv)Li7La3Zr2O12またはその元素置換体のようなガーネット型固体電解質、または
(v)Li3PO4またはそのN置換体
である。
(i)テトラアルキルアンモニウムまたはテトラアルキルホスホニウムのような脂肪族鎖状4級塩類、
(ii)ピロリジニウム類、モルホリニウム類、イミダゾリニウム類、テトラヒドロピリミジニウム類、ピペラジニウム類、またはピペリジニウム類のような脂肪族環状アンモニウム、または
(iii)ピリジニウム類またはイミダゾリウム類のような含窒ヘテロ環芳香族カチオン
である。
(i)天然黒鉛または人造黒鉛のようなグラファイト類、
(ii)アセチレンブラックまたはケッチェンブラックのようなカーボンブラック類、
(iii)炭素繊維または金属繊維のような導電性繊維類、
(iv)フッ化カーボン、
(v)アルミニウムのような金属粉末類、
(vi)酸化亜鉛またはチタン酸カリウムのような導電性ウィスカー類、
(vii)酸化チタンのような導電性金属酸化物、または
(viii)ポリアニリン、ポリピロール、またはポリチオフェンのような導電性高分子化合物
である。低コスト化のために、上記(i)または(ii)の導電助剤が使用されてもよい。
[固体電解質材料の作製]
-60℃以下の露点および0.0001体積%以下の酸素濃度を有するアルゴン雰囲気(以下、「乾燥アルゴン雰囲気」という)中で、原料粉としてYCl3およびLiClが、1:3のYCl3:LiClモル比となるように用意された。これらの原料粉が、乳鉢中で粉砕され、混合された。得られた混合物は、アルミナ製るつぼ中で、550℃で1時間焼成された後、乳鉢中で粉砕された。得られた反応物は、-30℃の露点および20.9体積%の酸素濃度を有するアルゴン雰囲気中で、約10分間静置された。さらに、乾燥アルゴン雰囲気中で、550℃で1時間焼成された後、乳鉢中で粉砕された。このようにして、実施例1による固体電解質材料が得られた。
実施例1による固体電解質材料の単位重量あたりのLiおよびYの含有量は、高周波誘導結合プラズマ発光分光分析装置(Thermo Fisher Scientific製、iCAP7400)を用いて、高周波誘導結合プラズマ発光分光分析法により測定された。実施例1による固体電解質材料のClの含有量は、イオンクロマトグラフ装置(Dionex製、ICS-2000)を用いて、イオンクロマトグラフィー法により測定された。これらの測定結果から得られたLi、Y、およびClの含有量をもとに、Li:Y:Clモル比が算出された。その結果、実施例1による固体電解質材料は、2.56:1.00:5.29のLi:Y:Clモル比を有していた。
融点の測定には、熱分析装置(T.A.インスツルメント製、Q1000)が用いられた。窒素雰囲気中で、実施例1による固体電解質材料(約5mg)を測り取り、10K/minの昇温速度で300℃から530℃まで加熱した。そのときの吸熱ピークが観測された。得られたデータをもとに、横軸を温度、縦軸を発熱量として二次元グラフが作成された。固体電解質材料が発熱も吸熱もしていないグラフ上の2点を直線で結び、これをベースラインとした。次いで、吸熱ピークの変曲点における接線とベースラインの交点を融点とした。その結果、実施例1による固体電解質材料の融点は、500.6℃であった。図6は、実施例1による固体電解質材料の熱分析の結果を示すグラフである。
固体電解質材料の結晶構造の解析には、X線回折装置(RIGAKU社、MiniFlex600)が用いられた。-45℃以下の露点を有するドライ環境で、実施例1による固体電解質材料のX線回折パターンが測定された。X線源として、Cu-Kα線(波長1.5405Åおよび1.5444Å)が使用された。
図3は、固体電解質材料のイオン伝導度を評価するために用いられた加圧成形ダイス300の模式図を示す。
σ=(RSE×S/t)-1 ・・・(1)
乾燥アルゴン雰囲気中で、実施例1による固体電解質材料および活物質であるLiCoO2が、70:30の体積比率となるように用意された。これらの材料がメノウ乳鉢中で混合された。このようにして、混合物が得られた。
図5は、実施例1による電池の初期放電特性を示すグラフである。図5に示される結果は、下記の方法により、測定された。
-30℃の露点を有する雰囲気中で反応物が静置された時間を、約10分間ではなく30分間としたこと以外は、実施例1と同様にして、実施例2による固体電解質材料が得られた。
乾燥アルゴン雰囲気中で、原料粉としてYCl3およびLiClが、1:3のYCl3:LiClモル比となるように用意された。これらの原料粉が、乳鉢中で粉砕され、混合された。得られた混合物は、アルミナ製るつぼ中で、550℃で1時間焼成された後、乳鉢中で粉砕された。このようにして、比較例1による固体電解質材料が得られた。
表1から明らかなように、実施例1から3による固体電解質材料は、比較例1による固体電解質材料よりも低い融点を有する。さらに、実施例1から3による固体電解質材料は、室温近傍において、1×10-5S/cm以上の高いイオン伝導性を有する。
[固体電解質材料の作製]
乾燥アルゴン雰囲気中で、原料粉としてYCl3およびLiClが、1:3のYCl3:LiClモル比となるように用意された。これらの原料粉が、乳鉢中で粉砕され、混合された。得られた混合物は、アルミナ製るつぼ中で、550℃で1時間焼成された後、乳鉢中で粉砕された。得られた反応物は、-30℃の露点および20.9体積%の酸素濃度を有するアルゴン雰囲気中で、約10分間静置された。さらに、乾燥アルゴン雰囲気中で、400℃で1時間焼成された後、乳鉢中で粉砕された。このようにして、実施例4による固体電解質材料が得られた。
実施例1と同様にして、実施例4による固体電解質材料全体におけるLi、Y、およびClの含有量が測定され、Li:Y:Clモル比が算出された。その結果、実施例4による固体電解質材料は、2.56:1.00:5.16のLi:Y:Clモル比を有していた。
実施例1と同様にして、実施例4による固体電解質材料の融点が測定された。その結果、実施例4による固体電解質材料の融点は、498.8℃であった。図10は、実施例4による固体電解質材料の熱分析の結果を示すグラフである。
実施例1と同様にして、実施例4による固体電解質材料のX線回折パターンが測定された。
実施例4による固体電解質材料を用いて、実施例1と同様にして、実施例4による電池が得られた。
-30℃の露点を有する雰囲気中で反応物が静置された時間を、約10分間ではなく30分間としたこと以外は、実施例4と同様にして、実施例5による固体電解質材料が得られた。
-30℃の露点を有する雰囲気中で反応物が静置された時間を、約10分間ではなく9時間としたこと以外は、実施例7と同様にして、比較例2による固体電解質材料が得られた。
表3から明らかなように、実施例4から6による固体電解質材料は、比較例1による固体電解質材料よりも低い融点を有する。さらに、実施例4から6による固体電解質材料は、室温近傍において、1×10-5S/cm以上の高いイオン伝導度を有する。一方、比較例2による固体電解質材料は、1×10-5S/cm未満のイオン伝導度を有する。
101 固体電解質材料の粉末
201 正極
202 電解質層
203 負極
204 正極活物質粒子
205 負極活物質粒子
300 加圧成形ダイス
301 パンチ上部
302 枠型
303 パンチ下部
1000 電池
Claims (10)
- Li、Y、X、およびOから構成され、
ここで、Xは、F、Cl、Br、およびIからなる群より選択される1つであり、かつ
Yに対するOのモル比は、0.01より大きく、かつ、0.52未満である、
固体電解質材料。 - Xは、Clである、
請求項1に記載の固体電解質材料。 - Mg、Ca、Zn、Sr、Ba、Al、Sc、Ga、Bi、La、Zr、Hf、Ta、およびNbからなる群より選択される少なくとも1つをさらに含む、
請求項1または2に記載の固体電解質材料。 - Cu-Kαを用いたX線回折測定によって得られるX線回折パターンにおいて、15.2°以上16.4°以下、16.7°以上18.6°以下、30.8°以上31.9°以下、33.2°以上34.3°以下、40.3°以上41.4°以下、48.2°以上49.3°以下、および53.0°以上54.2°以下の回折角2θの範囲にピークが存在する、
請求項1から3のいずれか一項に記載の固体電解質材料。 - Yに対するLiのモル比は、2.2以上2.56以下であり、かつ
Yに対するXのモル比は、3.5以上5.9以下である、
請求項1から4のいずれか一項に記載の固体電解質材料。 - Yに対するOのモル比は、0.01より大きく、かつ0.50以下である、
請求項1から5のいずれか一項に記載の固体電解質材料。 - 前記固体電解質材料の表面領域におけるYに対するOのモル比は、前記固体電解質材料の全体におけるYに対するOのモル比よりも大きい、
請求項1から3のいずれか一項に記載の固体電解質材料。 - Cu-Kαを用いたX線回折測定によって得られるX線回折パターンにおいて、15.2°以上16.3°以下、16.7°以上18.5°以下、30.8°以上31.9°以下、33.1°以上34.2°以下、40.3°以上41.4°以下、48.2°以上49.3°以下、および53.1°以上54.2°以下の回折角2θの範囲にピークが存在する、
請求項1から3および7のいずれか一項に記載の固体電解質材料。 - 前記固体電解質材料の全体におけるYに対するOのモル比は、0.01より大きく、かつ0.33以下である、
請求項1から3、7、および8のいずれか一項に記載の固体電解質材料。 - 正極、
負極、および
前記正極および前記負極の間に配置されている電解質層、
を備え、
前記正極、前記負極、および前記電解質層からなる群より選択される少なくとも1つは、請求項1から9のいずれか一項に記載の固体電解質材料を含有する、
電池。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202080092035.6A CN114930593B (zh) | 2020-01-29 | 2020-11-25 | 固体电解质材料及使用了它的电池 |
| JP2021574483A JP7634232B2 (ja) | 2020-01-29 | 2020-11-25 | 固体電解質材料およびこれを用いた電池 |
| EP20916741.0A EP4099448A4 (en) | 2020-01-29 | 2020-11-25 | Solid electrolyte material and battery using same |
| US17/810,840 US20220352546A1 (en) | 2020-01-29 | 2022-07-06 | Solid electrolyte material and battery using same |
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| JP2020012969 | 2020-01-29 | ||
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| US17/810,840 Continuation US20220352546A1 (en) | 2020-01-29 | 2022-07-06 | Solid electrolyte material and battery using same |
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| WO2021152979A1 true WO2021152979A1 (ja) | 2021-08-05 |
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| KR20230060607A (ko) * | 2021-10-27 | 2023-05-08 | 한국전자기술연구원 | 염화물계 고체전해질, 전고체전지 및 그의 제조 방법 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010202499A (ja) * | 2009-02-04 | 2010-09-16 | Toyota Central R&D Labs Inc | ガーネット型リチウムイオン伝導性酸化物 |
| JP2011129312A (ja) | 2009-12-16 | 2011-06-30 | Toyota Motor Corp | 硫化物固体電解質材料の製造方法、硫化物固体電解質材料およびリチウム電池 |
| WO2018025582A1 (ja) | 2016-08-04 | 2018-02-08 | パナソニックIpマネジメント株式会社 | 固体電解質材料、および、電池 |
| WO2019146308A1 (ja) * | 2018-01-26 | 2019-08-01 | パナソニックIpマネジメント株式会社 | 電極材料、および、電池 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007048289A1 (de) * | 2007-10-08 | 2009-04-09 | Universität Siegen | Lithium-Argyrodite |
| EP2683005B1 (en) * | 2012-07-06 | 2016-06-01 | Samsung Electronics Co., Ltd | Solid ionic conductor, solid electrolyte including the same, lithium battery including said solid electrolyte, and method of manufacturing said lithium battery |
| EP3523847A4 (en) * | 2016-10-07 | 2020-08-12 | The Regents of The University of Michigan | STABILIZATION COATINGS FOR MONOLITHIC BATTERIES |
| CN112930319B (zh) * | 2018-12-26 | 2024-08-09 | 松下知识产权经营株式会社 | 固体电解质材料和使用该材料的电池 |
| JP7608340B2 (ja) * | 2019-08-07 | 2025-01-06 | Tdk株式会社 | 固体電解質、固体電解質層および固体電解質電池 |
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2020
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- 2020-11-25 JP JP2021574483A patent/JP7634232B2/ja active Active
- 2020-11-25 EP EP20916741.0A patent/EP4099448A4/en active Pending
- 2020-11-25 CN CN202080092035.6A patent/CN114930593B/zh active Active
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2022
- 2022-07-06 US US17/810,840 patent/US20220352546A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010202499A (ja) * | 2009-02-04 | 2010-09-16 | Toyota Central R&D Labs Inc | ガーネット型リチウムイオン伝導性酸化物 |
| JP2011129312A (ja) | 2009-12-16 | 2011-06-30 | Toyota Motor Corp | 硫化物固体電解質材料の製造方法、硫化物固体電解質材料およびリチウム電池 |
| WO2018025582A1 (ja) | 2016-08-04 | 2018-02-08 | パナソニックIpマネジメント株式会社 | 固体電解質材料、および、電池 |
| WO2019146308A1 (ja) * | 2018-01-26 | 2019-08-01 | パナソニックIpマネジメント株式会社 | 電極材料、および、電池 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230060607A (ko) * | 2021-10-27 | 2023-05-08 | 한국전자기술연구원 | 염화물계 고체전해질, 전고체전지 및 그의 제조 방법 |
| KR102705077B1 (ko) * | 2021-10-27 | 2024-09-11 | 한국전자기술연구원 | 염화물계 고체전해질, 전고체전지 및 그의 제조 방법 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7634232B2 (ja) | 2025-02-21 |
| CN114930593B (zh) | 2025-06-03 |
| EP4099448A4 (en) | 2023-06-28 |
| JPWO2021152979A1 (ja) | 2021-08-05 |
| CN114930593A (zh) | 2022-08-19 |
| US20220352546A1 (en) | 2022-11-03 |
| EP4099448A1 (en) | 2022-12-07 |
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