[go: up one dir, main page]

WO2013001961A1 - Composition de couche d'adhésive isolant, élément pour dispositif de stockage électrique, dispositif de stockage électrique et procédés de fabrication de ceux-ci - Google Patents

Composition de couche d'adhésive isolant, élément pour dispositif de stockage électrique, dispositif de stockage électrique et procédés de fabrication de ceux-ci Download PDF

Info

Publication number
WO2013001961A1
WO2013001961A1 PCT/JP2012/063638 JP2012063638W WO2013001961A1 WO 2013001961 A1 WO2013001961 A1 WO 2013001961A1 JP 2012063638 W JP2012063638 W JP 2012063638W WO 2013001961 A1 WO2013001961 A1 WO 2013001961A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
insulating adhesive
adhesive layer
electrode layer
positive electrode
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
Application number
PCT/JP2012/063638
Other languages
English (en)
Japanese (ja)
Inventor
上羽悠介
澤田学
板谷昌治
堀川景司
福田恭丈
得原幸夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Publication of WO2013001961A1 publication Critical patent/WO2013001961A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/411—Organic material
    • H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H01G11/12—Stacked hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
    • 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
    • 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
    • Y02E60/13—Energy storage using capacitors
    • 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 an insulating adhesive layer composition, a power storage device element and a power storage device, and further relates to a power storage device element and a method of manufacturing a power storage device.
  • High energy density power storage devices represented by lithium ion secondary batteries, lithium ion capacitors, electric double layer capacitors, and the like are, for example, sheet-shaped current collector foils (such as aluminum foil or copper foil) and active materials (activated carbon, A storage element formed by laminating a sheet-like electrode formed by coating a lithium composite oxide, carbon, etc.) via a sheet-like separator for preventing a short circuit due to contact between the electrodes;
  • the electrolyte solution has a structure accommodated in the exterior body.
  • a ceramic sheet formed by mixing an electrolyte and porous ceramics and forming a film with a binder is used as a separator material, and a positive electrode layer and a negative electrode layer are interposed through the ceramic sheet.
  • Patent Document 1 A stacked battery manufactured through a process of stacking and hot pressing the stacked body at once has been proposed.
  • the current collector metal 120 to which the activated carbon electrode 110 is bonded is opposed, and a separator 130 and an electrolytic solution (not shown) are interposed therebetween,
  • Electric double layer capacitor has been proposed (Patent Document 2).
  • Patent Document 3 As another power storage device, a power storage device (electric double layer capacitor) in which a separator, a current collector, and a polarizable electrode are integrated by a gasket made of an adhesive thermoplastic resin has been proposed (Patent Document). 3).
  • Patent Document 3 it is described that a thermoplastic resin having a polar functional group is used as the thermoplastic resin having adhesiveness constituting the gasket.
  • modified polypropylene and modified polyethylene have no electrolyte impregnation or permeability, so the electrolyte solution is preliminarily separated before separation (and depending on the case).
  • Electrode must be impregnated in advance, and cannot be applied to a manufacturing method in which an electrolytic solution is added after formation of the laminated body, and the manufacturing process becomes complicated.
  • the present invention solves the above-described problems, and includes an insulating adhesive layer composition for an electricity storage device that can impart electrolyte permeability and impregnation to a laminate, and the insulating adhesive layer composition. It is an object of the present invention to provide an element for an electricity storage device, an electricity storage device having good characteristics, and a method for producing them, including the insulating adhesive layer.
  • the element for the electricity storage device of the present invention is A positive electrode layer and a negative electrode layer are stacked via a separator layer and an insulating adhesive layer, and the power storage device includes a laminate having a structure in which the positive electrode layer and the negative electrode layer are bonded by the insulating adhesive layer An element,
  • the insulating adhesive layer composition according to claim 1 is used for the insulating adhesive layer.
  • the electricity storage device of the present invention A laminate having a structure in which a positive electrode layer and a negative electrode layer are laminated via a separator layer and an insulating adhesive layer, and the positive electrode layer and the negative electrode layer are adhered by the insulating adhesive layer;
  • An electricity storage device comprising the laminate and a package in which the electrolytic solution is stored,
  • the insulating adhesive layer composition according to claim 1 is used for the insulating adhesive layer.
  • the method for producing an element for an electricity storage device of the present invention includes A positive electrode layer and a negative electrode layer are stacked via a separator layer and an insulating adhesive layer, and the power storage device includes a laminate having a structure in which the positive electrode layer and the negative electrode layer are bonded by the insulating adhesive layer
  • the positive electrode layer material to be the positive electrode layer and the negative electrode layer material to be the negative electrode layer are opposed to each other through the separator layer material to be the separator layer and the insulating adhesive layer material to be the insulating adhesive layer.
  • the method for manufacturing the electricity storage device of the present invention includes A laminate having a structure in which a positive electrode layer and a negative electrode layer are laminated via a separator layer and an insulating adhesive layer, and the positive electrode layer and the negative electrode layer are adhered by the insulating adhesive layer;
  • a laminate having a structure in which a positive electrode layer and a negative electrode layer are laminated via a separator layer and an insulating adhesive layer, and the positive electrode layer and the negative electrode layer are adhered by the insulating adhesive layer;
  • (1) The positive electrode layer material to be the positive electrode layer and the negative electrode layer material to be the negative electrode layer are passed through the separator layer material to be the separator layer and the insulating adhesive layer material to be the insulating adhesive layer.
  • the ratio ⁇ between the pigment volume concentration PVC represented by the formula (2) and the critical pigment volume concentration CPVC, which is the maximum pigment volume concentration at which voids are considered to be zero, is given by 0.7 ⁇
  • the insulating adhesive layer composition of the present invention has a structure in which a positive electrode layer and a negative electrode layer are laminated via a separator layer and an insulating adhesive layer, and the positive electrode layer and the negative electrode layer are bonded by an insulating adhesive layer.
  • the insulating adhesive layer composition of the present invention for the laminate constituting the electricity storage device as described above, a laminate capable of penetrating and impregnating the electrolyte from the outside to the inside of the laminate is obtained. It is possible to obtain an electricity storage device with excellent productivity.
  • the insulating adhesive layer made of a composite material that satisfies the requirement of 0.7 ⁇ ⁇ ⁇ 1.15 has the necessary adhesiveness, the positive electrode layer, the negative electrode layer, and the separator layer are integrated. A laminated body can be reliably formed, the production process can be simplified, and productivity can be improved.
  • the insulating adhesive layer may be disposed, for example, so as to surround the entire circumference of the separator layer, or may be disposed in a part of a region surrounding the entire circumference of the separator layer.
  • the separator layer is disposed so as to surround the entire circumference of the separator layer.
  • an insulating adhesive layer is disposed in such a manner as to penetrate through the central portion of the separator layer, and the positive electrode layer and the negative electrode layer facing each other are joined by the insulating adhesive layer via the separator layer. It is also possible to configure.
  • the element for an electricity storage device and the electricity storage device of the present invention are the laminated body in which the positive electrode layer and the negative electrode layer are laminated with the separator layer and the insulating adhesive layer interposed therebetween, and the insulating adhesive layer has the above-described insulation of the present invention. Since the separator layer can be designed optimally, the ionic resistance is low, the performance is high, the reliability is high, and the productivity is excellent. An electricity storage device can be obtained.
  • the positive electrode layer material and the negative electrode layer material are arranged so as to face each other with the separator layer material and the insulating adhesive layer material interposed therebetween, and are heated and pressurized.
  • the insulating property of the present invention described above is used as the insulating adhesive layer material at the stage of the formed laminate. Since the material for forming the adhesive layer composition is used, it is possible to efficiently manufacture a power storage device element having high performance and high reliability.
  • the method for producing an electricity storage device of the present invention is such that a positive electrode layer material and a negative electrode layer material are arranged so as to face each other with a separator layer material and an insulating adhesive layer material interposed therebetween, and heated and pressurized.
  • a material that can form the insulating adhesive layer composition of the present invention is used as the insulating adhesive layer material.
  • the resulting laminate is housed in a package together with the electrolyte, and the electrolyte is infiltrated and impregnated from the outside to the inside of the laminate, so it has high performance and high reliability. Devices can be manufactured efficiently.
  • the electrolyte solution can be penetrated and impregnated from the outside to the inside of the laminate by the insulating adhesive layer material as described above (that is, the material from which the insulating adhesive layer composition of the present invention is formed). ) Is used to form an insulating adhesive layer having the necessary liquid electrolyte-containing properties.
  • FIG. 2 is a cross-sectional plan view schematically illustrating an arrangement mode of a separator layer and an insulating adhesive layer of the electricity storage device of FIG. 1.
  • FIG. 4A and 4B are diagrams illustrating a state in which a positive electrode active material layer is formed on the positive electrode current collector layer illustrated in FIG.
  • (a) is a plan view and (b) is a front cross-sectional view. It is a figure which shows the state which formed the separator layer on the positive electrode electrical power collector layer shown in FIG. (a) is a figure which shows the positive electrode assembly sheet formed by arrange
  • the separator layer is required to have low ionic resistance, high adhesion, and high liquid content.
  • the separator layer and the insulating adhesive layer are interposed between the positive electrode layer and the negative electrode layer, and the insulating property of the separator layer is interposed between the separator layer and the insulating adhesive layer. It is possible to bond the positive electrode layer and the negative electrode layer without depending on the above, so that the separator layer is not required to have adhesiveness and the function as the separator layer is improved (high PVC, low ionic resistance). It is possible.
  • the present invention is characterized in that the insulating adhesive layer is made liquid-containing.
  • the insulating adhesive layer is made liquid-containing by using a resin in which inorganic fine particles (insulating fine particles) are mixed in an organic binder.
  • the stacked electricity storage device to which the present invention relates is usually used by being sealed in a package. Therefore, when the insulating adhesive layer has a liquid-containing property, since the electrolytic solution can pass through the insulating adhesive layer, the electrolytic solution contained in the entire package can be used. However, if the insulating adhesive layer is not liquid-containing, even if the inside of the package is filled with the electrolytic solution, the electrolytic solution around the laminated body cannot be effectively used because it cannot enter the laminated body. On the other hand, in the electricity storage device of the present invention in which the insulating adhesive layer is made liquid-containing, as a result of increasing the effective amount of the electrolyte used, for example, the more electrolyte there is like a lithium ion secondary battery. In an electricity storage device that is supposed to have high capacity, high rate characteristics, and long life, the characteristics can be improved efficiently.
  • a change over time such as a decrease in capacity in a lithium ion secondary battery is caused by a decomposition reaction of the electrolytic solution on the surface of the active material during a charge / discharge reaction, resulting in a depletion (dry up) of the electrolytic solution. Occur. Against this, it is possible to increase the amount of available electrolyte solution (effectively use the electrolyte solution contained between the package and the laminate) by providing liquid insulation to the insulating adhesive layer. This can contribute to higher capacity and longer life of devices.
  • a separator sheet pre-impregnated with an electrolytic solution is reduced in strength, and therefore, a method of injecting the electrolytic solution after lamination is desirable in production.
  • the insulating adhesive layer is provided with liquid content. Therefore, even when a structure in which an insulating adhesive layer is disposed so as to surround the separator layer is employed, it is possible to inject the electrolyte solution after lamination. As a result, it is possible to use a separator layer that is thinner, has a higher PVC, and has a lower ionic resistance than conventional ones, so that an electricity storage device with high characteristics can be obtained.
  • the insulating adhesive layer composition of the present invention suitable for use in an electricity storage device having the effects described above is chemically and electrochemically stable inside a lithium ion secondary battery, an electric double layer capacitor, or the like.
  • the inorganic fine particles are made of a composite material bound with a chemically and electrochemically stable organic binder inside a lithium ion secondary battery, an electric double layer capacitor, or the like.
  • Examples of the inorganic fine particles constituting the insulating adhesive layer composition of the present invention include oxides such as silica, alumina, titania and barium titanate, and nitrides such as silicon nitride and aluminum nitride.
  • Examples of the organic binder include polyvinylidene fluoride (PVDF), a copolymer of polyvinylidene fluoride and hexafluoropropylene (PVDF-HFP), and the like.
  • the composite material can be obtained by casting a slurry prepared by using an inorganic fine particle, an organic binder, and a solvent using, for example, a ball mill on a base material by a doctor blade method or the like and drying the slurry.
  • Spherical alumina powder (average particle size 0.3 ⁇ m) was prepared as inorganic fine particles constituting the composite material for the insulating adhesive layer composition. Further, polyvinylidene fluoride (PVDF) was prepared as an organic binder constituting the composite material.
  • PVDF polyvinylidene fluoride
  • the PVC of the insulating adhesive layer after drying is 20, 25, 30, 32, 34, 36, 40, 46, 48, 50, 55, 60, 65, 70, 75%.
  • a composite material sheet was prepared.
  • NMP N-methyl-2-pyrrolidone
  • This slurry was coated on a PET (polyethylene terephthalate) film by a doctor blade method and then dried to obtain a composite material sheet having a thickness of 25 ⁇ m (a sheet corresponding to the insulating adhesive layer of the present invention).
  • the critical pigment volume concentration CPVC the critical pigment volume concentration at the time of heating and pressing, and the liquid content of the electrolytic solution were examined.
  • Liquid content of electrolyte solution The following was prepared as an electrolyte solution and used for the liquid content test.
  • a non-aqueous solvent a mixed solvent in which ethylene carbonate (EC) and diethyl carbonate (DEC), which are cyclic carbonates, were mixed at a volume ratio of 3: 7 was used.
  • EC ethylene carbonate
  • DEC diethyl carbonate
  • a non-aqueous electrolyte solution was prepared by dissolving to a concentration of.
  • FIG. 1 is a front sectional view showing an electricity storage device (electric double layer capacitor) according to an example (Example 2) of the present invention, and FIG. 2 schematically shows an arrangement mode of a separator layer and an insulating adhesive layer.
  • FIG. 1 is a front sectional view showing an electricity storage device (electric double layer capacitor) according to an example (Example 2) of the present invention, and FIG. 2 schematically shows an arrangement mode of a separator layer and an insulating adhesive layer.
  • FIG. 1 is a front sectional view showing an electricity storage device (electric double layer capacitor) according to an example (Example 2) of the present invention
  • FIG. 2 schematically shows an arrangement mode of a separator layer and an insulating adhesive layer.
  • the electric double layer capacitor A of Example 2 includes a positive electrode layer 21 provided with a positive electrode active material 21b on both surfaces of a positive electrode current collector layer 21a, and a negative electrode on both surfaces of a negative electrode current collector layer 41a.
  • the laminate 1 is formed by laminating a negative electrode layer 41 provided with an active material 41 b via a separator layer 11 and an insulating adhesive layer 31.
  • a positive external terminal electrode 21 t and a negative external terminal electrode 41 t are formed on the first end surface 2 and the second end surface 3 of the multilayer body 1.
  • this laminated body 1 is accommodated in the package 70 which consists of a cover body 70a and the base part 70b with electrolyte solution.
  • the package 70 is formed with a positive electrode package electrode 61 and a negative electrode package electrode 62 so as to go around from both ends to the lower surface side.
  • the insulating adhesive layer 31 is disposed in a region surrounding the separator layer 11, and the positive electrode layer 21 and the negative electrode
  • the layer 41 is laminated via the separator layer 11 and an insulating adhesive layer 31 disposed in a region surrounding the separator layer 11.
  • the positive electrode current collector layer 21 a constituting the positive electrode layer 21 and the negative electrode current collector layer 41 a constituting the negative electrode layer 41 are laminated via the insulating adhesive layer 31.
  • the positive electrode active material layer 21b that constitutes 21 and the negative electrode active material layer 41b that constitutes the negative electrode layer 41 are laminated via the separator layer 11, and the positive electrode active material layer 21b and the negative electrode active material layer 41b are entirely separated by the separator layer 11.
  • the positive electrode current collector layer 21a and the negative electrode current collector layer 41a around the positive electrode active material layer 21b and the negative electrode active material layer 41b are laminated via the insulating adhesive layer 31. .
  • the insulating adhesive layer 31 is made of a composite material containing alumina ( ⁇ 0.3 ⁇ m), which is inorganic fine particles, and an organic binder. Its PVC is 40%, CPVC is 48%, and ⁇ is 0.83. An insulating adhesive layer composition having the requirements of the present invention is used. Below, the manufacturing method of this electric double layer capacitor A is demonstrated.
  • Step 1 (Preparation of current collector)
  • An aluminum layer having a thickness of 0.5 ⁇ m was formed by vapor deposition on a base material PET film coated with urethane as a release layer. Then, an etching mask resist was applied onto the surface of the formed aluminum layer by screen printing and dried.
  • the resist used was Ares SPR manufactured by Kansai Paint.
  • this film was immersed in an aqueous ferric chloride solution at 40 ° C., and the aluminum layer was patterned. Thereafter, the film is immersed in an organic solvent, the resist is peeled off, and then immersed in a mixed aqueous solution of sulfuric acid and hydrofluoric acid to remove the oxide layer on the surface of the aluminum layer, thereby removing the oxide layer shown in FIGS. As shown in FIG. 2, a plurality of positive electrode current collector layers 21 a were formed on the base PET film 100.
  • Step 2 (1) Preparation of slurry for active material layer 29.0 g of activated carbon (BET specific surface area 1668 m 2 / g, average pore diameter 1.83 nm, average particle diameter (D 50 ) 1.26 ⁇ m), carbon black (Tokai Carbon Co., Ltd. “Toka Black # 3855”, BET specific surface area 90 m 2 / g) 2.7 g was weighed and put into a 1000 ml pot, and PSZ grinding media having a diameter of 2.0 mm and 286 g After adding deionized water, the mixture was dispersed by mixing at 150 rpm for 4 hours using a rolling ball mill.
  • activated carbon BET specific surface area 1668 m 2 / g, average pore diameter 1.83 nm, average particle diameter (D 50 ) 1.26 ⁇ m
  • carbon black Tokai Carbon Co., Ltd. “Toka Black # 3855”, BET specific surface area 90 m 2 / g) 2.7 g was weighed and put into a
  • CMC2260 carboxymethyl cellulose
  • 38.8 wt% aqueous solution of polyacrylate resin a 38.8 wt% aqueous solution of polyacrylate resin
  • the positive electrode active material layer 21b is a region that is receded from the first end surface 2 by a predetermined distance so as not to be directly connected to the positive electrode external terminal electrode 21t on the first end surface 2 of the multilayer body 1. To be formed. That is, when printing the active material layer slurry, the active material layer slurry was screen-printed so that an uncoated region having a predetermined width was formed from the cut surface when cut in Step 6 described later. . *
  • Step 3 (1) Preparation of separator layer slurry 50 g of silica (manufactured by Denki Kagaku Kogyo Co., Ltd., average particle size (D 50 ) 0.7 ⁇ m) and 50 g of methyl ethyl ketone as a solvent were charged into a 500 ml pot. Further, PSZ grinding media having a diameter of 5 mm were put, and the mixture was dispersed by mixing at 150 rpm for 16 hours using a rolling ball mill.
  • silica manufactured by Denki Kagaku Kogyo Co., Ltd., average particle size (D 50 ) 0.7 ⁇ m
  • PSZ grinding media having a diameter of 5 mm were put, and the mixture was dispersed by mixing at 150 rpm for 16 hours using a rolling ball mill.
  • NMP N-methyl-2-pyrrolidone
  • PVDF polyvinylidene fluoride
  • Step 4 (1) Preparation of Slurry for Insulating Adhesive Layer 100 g of alumina (manufactured by Denki Kagaku Kogyo Co., Ltd., average particle size (D 50 ) 0.3 ⁇ m) is added to a 500 ml pot, and N-methyl-2-pyrrolidone (as a solvent) 80 g of NMP) was added. Further, PSZ grinding media having a diameter of 5 mm were put, and the mixture was dispersed by mixing at 150 rpm for 16 hours using a rolling ball mill.
  • alumina manufactured by Denki Kagaku Kogyo Co., Ltd., average particle size (D 50 ) 0.3 ⁇ m
  • NMP N-methyl-2-pyrrolidone
  • a negative electrode current collector layer 41a and a negative electrode layer 41 composed of a negative electrode active material layer 41b formed on the surface thereof, a separator layer 11, an insulating adhesive layer 31, and Was formed on the base material PET film 100.
  • the positive electrode assembly sheet 20 and the negative electrode assembly sheet 40 have a surface on which the separator layer 11 and the insulating adhesive layer 31 are formed (surface opposite to the base PET film 100 side). It arrange
  • the positive electrode assembly sheet 20 was thermocompression bonded so that the positions of the positive electrode current collectors 21a were opposed to each other in a lateral direction (upper side in FIG. 7).
  • the positive electrode negative electrode assembly sheet 51 by which the positive electrode assembly sheet 20 and the negative electrode assembly sheet 40 were joined is obtained.
  • the temperature of the pressure plate was 150 ° C.
  • the pressure of the pressure was 20 MPa
  • the pressure time was 30 seconds.
  • two positive and negative electrode aggregate sheets 51 are arranged so that one positive and negative electrode aggregate sheet 51 is opposite in the vertical direction, and the opposite surface side base material is disposed.
  • the PET sheet was peeled, both were joined, and thermocompression bonded, thereby producing an aggregate sheet laminate 52 as shown in FIG.
  • the pressure plate temperature was 150 ° C.
  • the pressurization pressure was 20 MPa
  • the pressurization time was 30 seconds.
  • the positive and negative electrode aggregate sheet 51 is opposed to the aggregate sheet laminate 52 and thermocompression bonded, so that a composite laminate 53 composed of three positive and negative electrode aggregate sheets 51 is formed as shown in FIG. 12. Was made.
  • thermocompression bonding of the positive electrode negative electrode assembly sheet 51 was repeated in the same manner, and the successive pressure bonding was performed.
  • the positive electrode layer 21 and the negative electrode layer 41 are laminated via the separator layer 11 and the insulating adhesive layer 31, and the positive electrode layer 21 and the negative electrode layer 41 are formed by the insulating adhesive layer 31.
  • a laminated assembly 50 joined was obtained.
  • the laminated body 50 was cut along a cutting line D1 in FIG. 14 with a dicer and separated into individual pieces, thereby producing the laminated body 1 having a structure as shown in FIG.
  • the dimensions of the laminate 1 were a length of 4.7 mm and a width of 3.3 mm.
  • Step 7 Next, as shown in FIG. 16, a positive external terminal electrode 21t and a negative external terminal electrode 41t were formed on the first end surface 2 and the second end surface 3 of the laminate 1 by Al sputtering, respectively.
  • a conductive adhesive (not shown) containing gold as conductive particles is applied to the positive external terminal electrode 21t and the negative external terminal electrode 41t formed on the first end face 2 and the second end face 3 by dipping. did.
  • the laminate 1 is placed on the base portion 70 b of the package 70 so that the applied conductive adhesive is connected to the positive electrode package electrode 61 and the negative electrode package electrode 62, respectively. For 10 minutes to cure the conductive adhesive.
  • Step 9 an electrolytic solution was injected into the package 70 shown in FIG. 1 and sealed.
  • 1-ethyl-3-methylimidazolium tetrafluoroborate is injected as an electrolytic solution under reduced pressure, and a lid 70a made of a liquid crystal polymer is disposed on the upper surface of the base portion 70b of the package 70 in the same manner as the base portion 70b.
  • the base part 70b and the lid 70a were welded by irradiating laser along the frame part of the base part 70b of the package 70.
  • an electricity storage device (electric double layer capacitor) A having the configuration shown in FIG. 1 is obtained.
  • the separator layer 11, the positive electrode layer 21, the negative electrode layer 41, the insulating adhesive layer 31, and the like are drawn thick due to restrictions in drawing, but the actual dimensions are accurate. It is not enlarged or reduced.
  • the size or the positional relationship is appropriately modified or exaggerated so that the drawing is restricted or easily understood.
  • the insulating adhesive layer surrounding the separator layer is made of a composite material containing inorganic fine particles and an organic binder.
  • the necessary electrolyte solution permeability and liquid content are provided, it is possible to form a laminate in which the electrolyte solution can permeate and impregnate from the outside to the inside of the laminate. Therefore, an electric double layer capacitor excellent in productivity can be obtained.
  • the insulating adhesive layer made of a composite material that satisfies the requirement of 0.7 ⁇ ⁇ ⁇ 1.15 has the necessary adhesiveness, so that it has a laminated structure and has an excellent productivity. Can be obtained.
  • a function such as adhesiveness in the separator layer it is possible to design in pursuit of the function as the separator layer, and to improve the characteristics.
  • the electric double layer capacitor has been described as an example of the electricity storage device, but the present invention can also be applied to a lithium ion secondary battery, a lithium ion capacitor, and the like.
  • the positive electrode layer and the negative electrode layer are laminated via the separator layer and the insulating adhesive layer, and the positive electrode layer and the negative electrode layer are laminated via the insulating adhesive layer, together with the electrolytic solution. They have a common structure in that they are accommodated in the outer packaging material. In addition, for example, as a lithium ion secondary battery or a lithium ion capacitor, the thing of the following structures is illustrated.
  • a lithium ion secondary battery for example, an aluminum foil is used as a positive electrode current collector layer, and an electrode in which a mixture layer containing a lithium composite oxide is provided on the aluminum foil as a positive electrode active material layer is used as a positive electrode layer.
  • the negative electrode current collector layer for example, a copper foil is used, and an electrode in which a mixture layer containing graphite is provided as a negative electrode active material layer on the copper foil is used as the negative electrode layer.
  • a positive electrode layer and a negative electrode layer are laminated via a separator layer and an insulating adhesive layer to form a laminate, and for example, 1 mol / l LiPF 6 is dissolved in a mixed solvent of ethylene carbonate and diethyl carbonate.
  • a lithium ion secondary battery can be obtained by using the electrolyte as an electrolytic solution (nonaqueous electrolytic solution).
  • lithium ion capacitor for example, an aluminum foil is used as the positive electrode current collector layer, and an electrode in which a mixture layer containing activated carbon is provided as a positive electrode active material layer on the aluminum foil is used as the positive electrode layer.
  • the negative electrode current collector layer for example, a copper foil is used, and an electrode provided with a mixture layer containing graphite as a negative electrode active material layer on the copper foil is used as a negative electrode layer, and lithium ions are further pre-doped into the negative electrode layer. To do.
  • a positive electrode layer and negative electrode layer, to form a separator layer and the insulating adhesive layer are laminated via a stack, for example, by dissolving LiPF 6 in 1 mol / l in a mixed solvent of ethylene carbonate and diethyl carbonate
  • a lithium ion capacitor can be obtained by using an electrolytic solution as an electrolytic solution (non-aqueous electrolytic solution).
  • the present invention is not limited to each of the above examples, and the positive electrode layer, the negative electrode layer, the separator layer, the constituent material and forming method of the insulating adhesive layer, the specific configuration of the power storage element (the positive electrode layer, Various types of applications and modifications can be made within the scope of the invention with respect to the negative electrode layer, separator layer, insulating adhesive layer stacking number and number of layers, etc. It is.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne : une composition de couche d'adhésif isolant pour dispositif de stockage électrique, ladite composition permettant à un stratifié d'être pénétré ou imprégné d'une solution électrolyte ; un élément pour dispositif de stockage électrique qui présente de bonnes caractéristiques et comporte une couche d'adhésif isolant comprenant ladite composition de couche d'adhésif isolant ; un dispositif de stockage électrique ; et des procédés de fabrication de ceux-ci. Selon l'invention, une composition de couche d'adhésif isolant comprend un composite de microparticules inorganiques et d'un liant organique, le rapport (Λ = PVC/CPVC) entre la concentration en volume de pigment (PVC) dudit composite et la concentration en volume de pigment critique (CPVC) de celui-ci satisfaisant la relation 0,7 ≤ Λ ≤ 1,15, est utilisée comme composition (composition de couche d'adhésif isolant) constituant la couche d'adhésif isolant dans un dispositif de stockage électrique (condensateur électrique à double couche) (A) comportant un stratifié (1) qui a une structure dans laquelle : une couche d'électrode positive (21) et une couche d'électrode négative (41) sont stratifiées l'une à l'autre, une couche de séparateur (11) et une couche d'adhésif isolant (31) étant interposées entre elles ; et ladite couche d'électrode positive et ladite couche d'électrode négative sont collées l'une à l'autre par ladite couche d'adhésif isolant.
PCT/JP2012/063638 2011-06-28 2012-05-28 Composition de couche d'adhésive isolant, élément pour dispositif de stockage électrique, dispositif de stockage électrique et procédés de fabrication de ceux-ci Ceased WO2013001961A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-142475 2011-06-28
JP2011142475 2011-06-28

Publications (1)

Publication Number Publication Date
WO2013001961A1 true WO2013001961A1 (fr) 2013-01-03

Family

ID=47423862

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/063638 Ceased WO2013001961A1 (fr) 2011-06-28 2012-05-28 Composition de couche d'adhésive isolant, élément pour dispositif de stockage électrique, dispositif de stockage électrique et procédés de fabrication de ceux-ci

Country Status (2)

Country Link
TW (1) TW201302971A (fr)
WO (1) WO2013001961A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016091635A (ja) * 2014-10-30 2016-05-23 三菱マテリアル株式会社 蓄電デバイスの製造方法
WO2016161088A2 (fr) 2015-03-31 2016-10-06 Fundamental Solutions Corporation Système de biocapteur pour la détection rapide d'analytes
WO2016167156A1 (fr) * 2015-04-16 2016-10-20 株式会社村田製作所 Dispositif de stockage d'électricité à empilement
US10163570B2 (en) 2015-04-15 2018-12-25 Murata Manufacturing Co., Ltd. Power storage device
CN114868294A (zh) * 2019-12-27 2022-08-05 株式会社村田制作所 固体电池

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11111341A (ja) * 1997-09-30 1999-04-23 Sony Corp ゲル電解質二次電池
JPH11185773A (ja) * 1997-12-18 1999-07-09 Sony Corp ゲル状電解質電池
JPH11297360A (ja) * 1998-04-08 1999-10-29 Tdk Corp シート型電極・電解質構造体の製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11111341A (ja) * 1997-09-30 1999-04-23 Sony Corp ゲル電解質二次電池
JPH11185773A (ja) * 1997-12-18 1999-07-09 Sony Corp ゲル状電解質電池
JPH11297360A (ja) * 1998-04-08 1999-10-29 Tdk Corp シート型電極・電解質構造体の製造方法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016091635A (ja) * 2014-10-30 2016-05-23 三菱マテリアル株式会社 蓄電デバイスの製造方法
WO2016161088A2 (fr) 2015-03-31 2016-10-06 Fundamental Solutions Corporation Système de biocapteur pour la détection rapide d'analytes
US10163570B2 (en) 2015-04-15 2018-12-25 Murata Manufacturing Co., Ltd. Power storage device
WO2016167156A1 (fr) * 2015-04-16 2016-10-20 株式会社村田製作所 Dispositif de stockage d'électricité à empilement
JPWO2016167156A1 (ja) * 2015-04-16 2017-11-24 株式会社村田製作所 積層蓄電デバイス
US10163581B2 (en) 2015-04-16 2018-12-25 Murata Manufacturing Co., Ltd. Laminated power storage device
CN114868294A (zh) * 2019-12-27 2022-08-05 株式会社村田制作所 固体电池

Also Published As

Publication number Publication date
TW201302971A (zh) 2013-01-16

Similar Documents

Publication Publication Date Title
JP5867044B2 (ja) 絶縁性接着層およびそれを用いた蓄電デバイス
JP4623039B2 (ja) 電気化学素子
CN102460775B (zh) 利用纳米孔隔板层的锂电池
JP4293501B2 (ja) 電気化学デバイス
CN103650084B (zh) 蓄电设备用元件及蓄电设备
TWI466365B (zh) An insulating layer with heat-resistant insulation
KR101860601B1 (ko) 내열 절연층이 형성된 세퍼레이터 및 이를 구비하는 전기 디바이스
JP4008508B2 (ja) リチウムイオン二次電池の製造方法
US9847518B2 (en) Separator with heat-resistant insulation layer
JPWO2017057762A1 (ja) リチウムイオン二次電池の電極部、リチウムイオン二次電池及びリチウムイオン二次電池の製造方法
JP5880555B2 (ja) 蓄電デバイス用セパレータ、蓄電デバイス用素子、蓄電デバイス、およびそれらの製造方法
JP5477609B2 (ja) 蓄電デバイスとその製造方法
WO2013001961A1 (fr) Composition de couche d'adhésive isolant, élément pour dispositif de stockage électrique, dispositif de stockage électrique et procédés de fabrication de ceux-ci
WO2013001962A1 (fr) Composition de couche d'adhésif isolant, élément pour dispositif de stockage électrique, dispositif de stockage électrique et procédés de fabrication de ceux-ci
JP5845896B2 (ja) 蓄電デバイス
JP2006086148A (ja) 電気二重層キャパシタおよびその製造方法
JP2004253243A (ja) 板型電池およびその製造方法
JP5852881B2 (ja) ラミネート型蓄電素子及びその製造方法
JP5829564B2 (ja) 電極構造およびそれを用いた蓄電デバイス
JP2012014884A (ja) 非水二次電池
JP2007087680A (ja) 電子部品用電極−高分子電解質膜複合体およびその製造方法
JP2013131675A (ja) 蓄電デバイスのセパレータ、絶縁性接着層、それに用いられる組成物、蓄電デバイス用素子、蓄電デバイス、および蓄電デバイス用素子の製造方法
WO2012002359A1 (fr) Dispositif de stockage d'énergie et son procédé de production
JP2016131057A (ja) 蓄電装置
CN119253083A (zh) 非水电解质二次电池用电极体的制造方法、电极体和电池

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: 12804356

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12804356

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP