WO2019167740A1 - Procédé de production de dispositif électrochimique et dispositif électrochimique - Google Patents

Procédé de production de dispositif électrochimique et dispositif électrochimique Download PDF

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Publication number
WO2019167740A1
WO2019167740A1 PCT/JP2019/006252 JP2019006252W WO2019167740A1 WO 2019167740 A1 WO2019167740 A1 WO 2019167740A1 JP 2019006252 W JP2019006252 W JP 2019006252W WO 2019167740 A1 WO2019167740 A1 WO 2019167740A1
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Prior art keywords
electrode
lithium
laminate
lithium electrode
electrochemical device
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PCT/JP2019/006252
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English (en)
Japanese (ja)
Inventor
寛実 佐藤
克典 横島
大輔 ▲高▼田
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太陽誘電株式会社
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Publication of WO2019167740A1 publication Critical patent/WO2019167740A1/fr

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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
    • 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
    • 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
    • H01G11/04—Hybrid capacitors
    • H01G11/06—Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
    • 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
    • H01G11/22—Electrodes
    • 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
    • H01G11/22—Electrodes
    • H01G11/30—Electrodes characterised by their material
    • H01G11/50—Electrodes characterised by their material specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
    • 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
    • H01G11/52—Separators
    • 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
    • H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
    • 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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a method for manufacturing an electrochemical device using lithium ions as a charge carrier and an electrochemical device.
  • lithium ions are pre-doped into the negative electrode.
  • a lithium electrode containing lithium metal is arranged outside an electrode stack, which is a stack of positive and negative electrodes.
  • the positive electrode and the negative electrode are formed by laminating an electrode active material on a current collector plate provided with a through hole, and lithium ions are supplied from the lithium metal to the negative electrode through the through hole and doped into the negative electrode.
  • Increasing the number of positive and negative electrode stacks to increase the capacity of the cell requires a long time for doping. Therefore, a cell composed of multiple electrode stacks and a lithium electrode between the electrode stacks is proposed. (For example, Patent Document 1).
  • Such a stacked lithium ion capacitor includes an electrode stacking process in which a positive electrode and a negative electrode are alternately stacked via a separator to form an electrode stack, a tape applying process in which a separator is taped on the outer periphery of the electrode stack, It can manufacture through the lithium electrode arrangement
  • the manufacturing method as described above has a complicated manufacturing process, and there is a concern about electrode displacement in the electrode stack during handling between processes. Moreover, since a tape is affixed on the outer side of an electrode laminated body, a partial area
  • the tape Although it is possible to make the tape an ion-permeable material, it is difficult to make the adhesive material ion-permeable, so the selection of the tape is not easy.
  • an object of the present invention is to provide an electrochemical device manufacturing method and an electrochemical device capable of preventing the occurrence of electrode misalignment and uniformly doping lithium ions.
  • a method for manufacturing an electrochemical device includes a first lithium electrode including metallic lithium, a second lithium electrode including metallic lithium, and a positive electrode including a positive electrode active material. And a negative electrode containing a negative electrode active material, and a first electrode laminate in which one or more positive electrodes and one or more negative electrodes are alternately laminated on the first lithium electrode via interelectrode separators. And laminating the second lithium electrode on the first electrode laminate to form an electrode lithium electrode laminate, and winding the interelectrode separator around the electrode lithium electrode laminate one or more times.
  • the first lithium electrode, the first electrode laminate, and the second lithium electrode are laminated and wound, so that the first electrode laminate is laminated for the lamination of the first lithium electrode and the second lithium electrode. There is no need to handle the electrode, and electrode displacement due to handling does not occur. Moreover, since the tape for fixing the interelectrode separator is not disposed between the first electrode laminate and each lithium electrode, the movement of lithium ions is not hindered by the tape, and pre-doping can be performed uniformly. .
  • the interelectrode separator is a single continuous separator, and may be folded over the first lithium electrode, the second lithium electrode, the positive electrode, and the negative electrode.
  • the first lithium electrode and the first electrode laminate are laminated via an interelectrode separator, and the first electrode laminate and the second lithium electrode are laminated. May be laminated via an interelectrode separator.
  • the first lithium electrode and the first electrode laminate are laminated via a plurality of interelectrode separators, and the first electrode laminate and the first electrode laminate are laminated.
  • Two lithium electrodes may be laminated via a plurality of interelectrode separators.
  • the first lithium electrode is formed by laminating metal lithium on one surface of a metal foil and laminating a lithium electrode separator thereon.
  • the second lithium electrode is formed by laminating metal lithium on one surface of a metal foil and laminating a lithium electrode separator thereon.
  • the first lithium electrode and the second lithium electrode may be arranged such that the lithium electrode separator is on the first electrode laminate side.
  • a third lithium electrode containing metallic lithium and a fourth lithium electrode containing metallic lithium are further prepared,
  • the first electrode laminate is laminated on the first lithium electrode
  • the second lithium electrode is laminated on the first electrode laminate
  • the third lithium electrode is stacked on the second lithium electrode, and one or more positive electrodes and one or more negative electrodes are alternately stacked on the third lithium electrode via the interelectrode separator.
  • a second electrode laminate may be laminated
  • the fourth lithium electrode may be laminated on the second electrode laminate to form the electrode lithium electrode laminate.
  • an electrochemical device includes a first lithium electrode, a first electrode laminate, a second lithium electrode, and an interelectrode separator.
  • the first electrode stack is stacked on the first lithium electrode, and a positive electrode including a positive electrode active material and a negative electrode including a negative electrode active material are alternately stacked via an interelectrode separator.
  • the second lithium electrode is stacked on the first electrode stack.
  • the interelectrode separator is wound around the electrode lithium electrode laminate in which the first lithium electrode, the first electrode laminate, and the second lithium electrode are laminated one or more times.
  • FIG. 1 is a perspective view of an electrochemical device according to an embodiment of the present invention. It is sectional drawing of the same electrochemical device. It is sectional drawing of the electrical storage element with which the same electrochemical device is provided. It is a schematic diagram which shows the manufacturing apparatus of the electrical storage element with which the same electrochemical device is equipped. It is sectional drawing of the electrical storage element with which the same electrochemical device is provided. It is sectional drawing of the electrical storage element with which the electrochemical device which concerns on embodiment of this invention is provided. It is sectional drawing of the electrical storage element with which the electrochemical device which concerns on embodiment of this invention is provided. It is sectional drawing of the electrical storage element with which the electrochemical device which concerns on embodiment of this invention is provided. It is sectional drawing of the electrical storage element with which the electrochemical device which concerns on embodiment of this invention is provided.
  • FIG. 1 is a perspective view of an electrochemical device 100 according to this embodiment
  • FIG. 2 is a cross-sectional view of the electrochemical device 100.
  • FIG. 2 is a cross-sectional view taken along line AA in FIG.
  • Electrochemical device 100 is an electrochemical device that requires lithium ion pre-doping and can be a lithium ion capacitor.
  • the electrochemical device 100 may be another electrochemical device that requires lithium ion pre-doping, such as a lithium ion battery. In the following description, it is assumed that the electrochemical device 100 is a lithium ion capacitor.
  • the electrochemical device 100 includes a power storage element 101, an exterior body 102, a positive electrode terminal 103, and a negative electrode terminal 104.
  • FIG. 3 is a cross-sectional view of the power storage element 101.
  • the power storage device 101 includes an electrode stack 110, a first lithium electrode 140, a second lithium electrode 145, and an interelectrode separator 160. These are laminated in the order of the first lithium electrode 140, the electrode laminate 110, and the second lithium electrode 145.
  • the electrode laminate 110 is obtained by alternately laminating positive electrodes 120 and negative electrodes 130 with interelectrode separators 160 interposed therebetween.
  • the positive electrode 120 includes a positive electrode current collector 121 and a positive electrode active material layer 122.
  • the positive electrode current collector 121 is a porous metal foil in which a large number of through holes are formed, for example, an aluminum foil.
  • the thickness of the positive electrode current collector 121 is, for example, 0.03 mm.
  • the positive electrode current collector 121 is electrically connected to the positive electrode terminal 103 via a wiring (not shown).
  • the positive electrode active material layer 122 is formed on both the front and back surfaces of the positive electrode current collector 121.
  • the positive electrode active material layer 122 may be a mixture of a positive electrode active material and a binder resin, and may further include a conductive additive.
  • the positive electrode active material is a material that can adsorb lithium ions and anions in the electrolytic solution, such as activated carbon or polyacene carbide.
  • the binder resin is a synthetic resin that joins the positive electrode active material.
  • styrene butadiene rubber polyethylene, polypropylene, aromatic polyamide, carboxymethyl cellulose, fluorine rubber, polyvinylidene fluoride, isoprene rubber, butadiene rubber, and ethylene propylene rubber. Etc. may be used.
  • the conductive assistant is particles made of a conductive material, and improves the conductivity between the positive electrode active materials.
  • Examples of the conductive assistant include carbon materials such as graphite and carbon black. These may be single and multiple types may be mixed.
  • the conductive auxiliary agent may be a metal material or a conductive polymer as long as it is a conductive material.
  • the negative electrode 130 includes a negative electrode current collector 131 and a negative electrode active material layer 132.
  • the negative electrode current collector 131 is a porous metal foil in which a large number of through holes are formed, for example, a copper foil.
  • the thickness of the negative electrode current collector 131 is, for example, 0.015 mm.
  • the negative electrode current collector 131 is electrically connected to the negative electrode terminal 104 by a wiring or the like (not shown).
  • the negative electrode active material layer 132 is formed on both the front and back surfaces of the negative electrode current collector 131.
  • the negative electrode active material layer 132 may be a mixture of a negative electrode active material and a binder resin, and may further include a conductive additive.
  • the negative electrode active material is a material that can occlude lithium ions in the electrolyte, such as non-graphitizable carbon (hard carbon), carbon-based materials such as graphite and soft carbon, alloy-based materials such as Si and SiO, or those These composite materials can be used.
  • the binder resin is a synthetic resin that joins the negative electrode active material.
  • styrene butadiene rubber polyethylene, polypropylene, aromatic polyamide, carboxymethyl cellulose, fluorine rubber, polyvinylidene fluoride, isoprene rubber, butadiene rubber, and ethylene propylene rubber. Etc. may be used.
  • the conductive assistant is a particle made of a conductive material, and improves the conductivity between the negative electrode active materials.
  • Examples of the conductive assistant include carbon materials such as graphite and carbon black. These may be single and multiple types may be mixed.
  • the conductive auxiliary agent may be a metal material or a conductive polymer as long as it is a conductive material.
  • the number of stacked layers of the positive electrode 120 and the negative electrode 130 is not particularly limited, and can be one or more. It is preferable that the electrode laminate 110 be disposed on the first lithium electrode 140 and second lithium electrode 145 side (the uppermost layer and the lowermost layer) to be the negative electrode 130.
  • the first lithium electrode 140 and the second lithium electrode 145 include a lithium electrode current collector 141, a metal lithium 142, and a lithium electrode separator 143, respectively.
  • the lithium electrode current collector 141 is a metal foil, such as a copper foil.
  • the lithium electrode current collector 141 is electrically connected to the negative electrode current collector 131 directly or via the negative electrode terminal 104.
  • the metal lithium 142 is affixed to the lithium electrode current collector 141 by pressure bonding or the like. It is preferable that the metal lithium 142 has a uniform thickness over the entire surface of the lithium electrode current collector 141.
  • the lithium electrode separator 143 is a separator disposed on the first lithium electrode 140 and the second lithium electrode 145, and is attached to the opposite side of the metal lithium 142 from the lithium electrode current collector 141, and is an ion contained in the electrolytic solution. Transparent.
  • the lithium electrode separator 143 can be a woven fabric, a nonwoven fabric, a synthetic resin microporous film, or the like, and can be made of, for example, an olefin resin as a main material.
  • the first lithium electrode 140 and the second lithium electrode 145 are arranged such that the lithium electrode separator 143 is on the electrode laminate 110 side, as shown in FIG.
  • the interelectrode separator 160 is a separator disposed between the positive electrode 120, the negative electrode 130, the first lithium electrode 140, and the second lithium electrode 145, and the electrode stack 110 and the first lithium electrode 140 are separated from each other. And the second lithium electrode 145 is wound around a laminate (hereinafter referred to as an electrode lithium electrode laminate).
  • the interelectrode separator 160 can transmit ions contained in the electrolytic solution, and can be a woven fabric, a non-woven fabric, a synthetic resin microporous membrane, or the like.
  • an olefin-based resin can be used as a main material.
  • the interelectrode separator 160 is a single continuous separator, and is folded while being separated between the first lithium electrode 140, the positive electrode 120, the negative electrode 130, and the second lithium electrode 145. It can be wound around the pole stack.
  • the number of windings is not particularly limited and may be one or more.
  • the exterior body 102 forms a storage space for storing the power storage element 101 and the electrolytic solution.
  • the exterior body 102 is a laminated film in which a metal foil such as an aluminum foil and a resin are laminated, and is fused and sealed around the power storage element 101.
  • the exterior body 102 is not limited to a laminate film, and may be a can-like member that can seal the accommodation space.
  • the electrolytic solution accommodated in the accommodation space together with the power storage element 101 is not particularly limited, for example, a solution containing LiPF 6 or the like as a solute can be used.
  • the positive electrode terminal 103 is an external terminal of the positive electrode 120 that is electrically connected to the positive electrode 120. As shown in FIG. 1, the positive terminal 103 is pulled out from between the exterior bodies 102.
  • the positive electrode terminal 103 may be a foil or a wire made of a conductive material.
  • the negative electrode terminal 104 is an external terminal of the negative electrode 130 that is electrically connected to the negative electrode 130. As shown in FIG. 1, the negative electrode terminal 104 is pulled out from between the exterior bodies 102.
  • the negative electrode terminal 104 may be a foil or a wire made of a conductive material.
  • Electrochemical device 100 has the above configuration. As shown in FIG. 3, the first lithium electrode 140 and the second lithium electrode 145 are encased by the interelectrode separator 160 together with the electrode stack 110, and between the first lithium electrode 140 and the electrode stack 110 and the second lithium. There is no end of the interelectrode separator 160 between the electrode 145 and the electrode stack 110.
  • the tape for fixing the end of the interelectrode separator 160 does not exist between the first lithium electrode 140 and the electrode stack 110 and between the second lithium electrode 145 and the electrode stack 110, and the tape lithium Ion movement is not hindered. Therefore, non-uniform lithium ion doping is prevented.
  • the power storage element 101 can be manufactured by preparing the positive electrode 120, the negative electrode 130, the first lithium electrode 140, and the second lithium electrode 145, and laminating them together with the interelectrode separator 160.
  • the first lithium electrode 140 is laminated on the interelectrode separator 160, and the interelectrode separator 160 is further laminated on the first lithium electrode 140.
  • negative electrodes 130 and positive electrodes 120 are alternately stacked via interelectrode separators 160, and are stacked up to the required number.
  • the 2nd lithium electrode 145 is laminated
  • the interelectrode separator 160 is wound around the electrode lithium electrode laminate one or more times.
  • the power storage element 101 is manufactured.
  • the produced power storage element 101 is housed in the exterior body 102, and the positive electrode 120 is electrically connected to the positive electrode terminal 103 and the negative electrode 130 is electrically connected to the negative electrode terminal 104. Further, the first lithium electrode 140 and the second lithium electrode 145 are electrically connected to the negative electrode 130.
  • the metal lithium 142 When the storage element 101 is immersed in the electrolytic solution, the metal lithium 142 is dissolved and lithium ions are released into the electrolytic solution. Lithium ions move through the electrolytic solution and are doped (pre-doped) into the negative electrode active material layer 132 of each negative electrode 130.
  • the positive electrode 120, the negative electrode 130, the first lithium electrode 140, and the second lithium electrode 145 are stacked and simultaneously wound by the interelectrode separator 160, and their positions are fixed.
  • a positive electrode and a negative electrode are laminated to form an electrode laminate, and the electrode laminate is handled and a lithium electrode is separately laminated.
  • electrode misalignment may occur in the electrode laminate by handling.
  • the positive electrode 120, the negative electrode 130, the first lithium electrode 140, and the second lithium electrode 145 are stacked together with the interelectrode separator 160, so that handling is performed. There is no need to do. Thereby, it is possible to prevent electrode displacement in the electrode stack.
  • FIG. 4 is a schematic diagram showing a manufacturing apparatus 200 for the electrochemical device 100.
  • the manufacturing apparatus 200 includes a positive electrode magazine 211, a negative electrode magazine 213, a first lithium electrode magazine 215, a second lithium electrode magazine 216, a positive electrode positioning mechanism 217, a negative electrode positioning mechanism 218, a stacking stage 219, and a separator supply unit. 220.
  • the positive electrode magazine 211 stores the positive electrode 120
  • the negative electrode magazine 213 stores the negative electrode 130
  • the first lithium electrode magazine 215 contains the first lithium electrode 140
  • the second lithium electrode magazine 216 contains the second lithium electrode 145.
  • a reel-shaped interelectrode separator 160 is set in the separator supply unit 220.
  • the positive electrode 120 is supplied from the positive electrode magazine 211 to the positive electrode positioning mechanism 217, positioned by the positive electrode positioning mechanism 217, and supplied to the stacking stage 219.
  • the negative electrode 130 is supplied from the negative electrode magazine 213 to the negative electrode positioning mechanism 218, positioned by the negative electrode positioning mechanism 218, and supplied to the stacking stage 219.
  • the first lithium electrode 140 is supplied from the first lithium electrode magazine 215 and the second lithium electrode 145 is supplied from the second lithium electrode magazine 216 to the negative electrode positioning mechanism 218, and is positioned by the negative electrode positioning mechanism 218. Supplied.
  • the negative electrode 130, the first lithium electrode 140, and the second lithium electrode 145 can be positioned by the negative electrode positioning mechanism 218. Is possible.
  • the manufacturing apparatus 200 supplies the positive electrode 120, the negative electrode 130, the first lithium electrode 140, and the second lithium electrode 145 to the stacking stage 219 in the above-described order, stacked via the interelectrode separator 160, and the interelectrode separator 160
  • the power storage element 101 is manufactured by being wound.
  • the electrochemical device according to the present embodiment may include a plurality of electrode laminates.
  • FIG. 5 is a schematic diagram showing an electricity storage element 301 of an electrochemical device including a plurality of electrode laminates.
  • the power storage element 301 can be housed in the exterior body 102 similarly to the power storage element 101, and the positive electrode terminal 103 and the negative electrode terminal 104 can be connected to the power storage element 301.
  • the same reference numeral is given to the same configuration as the storage element 101.
  • the power storage element 301 includes a first electrode stack 310, a second electrode stack 320, a first lithium electrode 330, a second lithium electrode 340, a third lithium electrode 350, a fourth lithium electrode 360, An interelectrode separator 370 is provided. These are laminated in the order of the first lithium electrode 330, the first electrode laminated body 310, the second lithium electrode 340, the third lithium electrode 350, the second electrode laminated body 320, and the fourth lithium electrode 360.
  • the first electrode laminate 310 and the second electrode laminate 320 are obtained by alternately laminating positive electrodes 120 and negative electrodes 130 via interelectrode separators 370, respectively.
  • the number of stacked positive electrodes 120 and negative electrodes 130 is not limited to that shown in FIG.
  • the first lithium electrode 330, the second lithium electrode 340, the third lithium electrode 350, and the fourth lithium electrode 360 include a lithium electrode current collector 141, a metal lithium 142, and a lithium electrode separator 143, respectively.
  • the first lithium electrode 330 and the second lithium electrode 340 are arranged so that the lithium electrode separator 143 is on the first electrode laminate 310 side.
  • the third lithium electrode 350 and the fourth lithium electrode 360 are arranged so that the lithium electrode separator 143 is on the second electrode laminate 320 side.
  • the interelectrode separator 370 is a separator disposed between the positive electrode 120, the negative electrode 130, the first lithium electrode 330, the second lithium electrode 340, the third lithium electrode 350, and the fourth lithium electrode 360, with a space therebetween.
  • a first electrode laminate 310, a second electrode laminate 320, a first lithium electrode 330, a second lithium electrode 340, a third lithium electrode 350, and a fourth lithium electrode 360 (electrode lithium electrode laminate). It is wound around.
  • the interelectrode separator 370 can transmit ions contained in the electrolytic solution, and can be a woven fabric, a nonwoven fabric, a synthetic resin microporous film, or the like.
  • the main material can be an olefin resin.
  • the interelectrode separator 370 is a single continuous separator, is folded while being separated between the positive electrode 120 and the negative electrode 130, and is wound around the electrode lithium electrode laminate. Can be.
  • the electricity storage element 301 has the above configuration. Note that the power storage element 301 may have three or more electrode stacks.
  • the power storage element 301 can be manufactured as follows. That is, the first lithium electrode 330 is stacked on the interelectrode separator 370, and the interelectrode separator 370 is further stacked on the first lithium electrode 330. On top of that, negative electrodes 130 and positive electrodes 120 are alternately stacked up to the required number via interelectrode separators 370. Further, the second lithium electrode 340 is laminated via the interelectrode separator 370, and the third lithium electrode 340 is laminated thereon.
  • the interelectrode separator 370 is stacked on the third lithium electrode 340, and the negative electrode 130 and the positive electrode 120 are alternately stacked on the third lithium electrode 340 through the interelectrode separator 370 to the required number. Furthermore, the 4th lithium electrode 360 is laminated
  • the interelectrode separator 370 is wound around the electrode lithium electrode laminate one or more times.
  • the power storage element 301 is manufactured.
  • the produced power storage element 301 is housed in the exterior body 102, and the positive electrode 120 is electrically connected to the positive electrode terminal 103 and the negative electrode 130 is electrically connected to the negative electrode terminal 104.
  • the first lithium electrode 330, the second lithium electrode 340, the third lithium electrode 350, and the fourth lithium electrode 360 are electrically connected to the negative electrode 130.
  • the tape that holds the interelectrode separator 370 does not face each lithium electrode, and lithium ions can be uniformly doped.
  • the electrode lithium electrode laminate is fixed by the interelectrode separator 370 together with the lamination of each electrode laminate and each lithium electrode, it is possible to prevent the occurrence of electrode misalignment.
  • the interelectrode separator 160 may not be disposed between the first lithium electrode 140 and the electrode stack 110 and between the second lithium electrode 145 and the electrode stack 110. This is because the lithium electrode separator 143 is provided on the first lithium electrode 140 and the second lithium electrode 145.
  • a plurality of interelectrode separators 160 may be laminated between the first lithium electrode 140 and the electrode laminate 110 and between the second lithium electrode 145 and the electrode laminate 110. Thereby, the liquid retention property of electrolyte solution is ensured and dope of lithium ion is promoted.
  • the interelectrode separator 160 may not be a continuous separator. As shown in the figure, the interelectrode separator 160 includes a plurality of interelectrode separators 160a disposed between the positive electrode 120, the negative electrode 130, the first lithium electrode 140, and the second lithium electrode 145, and an electrode lithium electrode laminate. It may include an inter-electrode separator 160b wound around.
  • Electrochemical device 101 Power storage element 102 ... Exterior body 103 ... Positive electrode terminal 104 ... Negative electrode terminal 110 ... Electrode laminated body 120 . Positive electrode 130 . Negative electrode 140 ... First lithium electrode 145 ... Second lithium electrode 160 ... Interelectrode separator

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Secondary Cells (AREA)
  • Cell Separators (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

Le problème décrit par la présente invention est de fournir : un procédé de production d'un dispositif électrochimique, qui permet un dopage uniforme d'ions lithium, tout en empêchant l'apparition d'un déplacement d'électrode ; et un dispositif électrochimique. La solution selon l'invention concerne un procédé de production d'un dispositif électrochimique comprenant : une étape de préparation d'une première électrode au lithium qui contient un métal lithium, une seconde électrode au lithium qui contient un métal lithium, une électrode positive qui contient un matériau actif d'électrode positive, et une électrode négative qui contient un matériau actif d'électrode négative ; une étape de formation d'un premier stratifié d'électrode dans lequel une ou plusieurs électrodes positives et une ou plusieurs électrodes négatives sont empilées, des séparateurs inter-électrodes étant interposés entre celles-ci, sur la première électrode de lithium ; une étape consistant à former un stratifié d'électrode-lithium-électrode en superposant la seconde électrode au lithium sur le premier stratifié d'électrode ; et une étape consistant à enrouler un séparateur inter-électrode autour du stratifié d'électrode-lithium-électrode une ou plusieurs fois.
PCT/JP2019/006252 2018-03-01 2019-02-20 Procédé de production de dispositif électrochimique et dispositif électrochimique WO2019167740A1 (fr)

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JP2018036193A JP2019153624A (ja) 2018-03-01 2018-03-01 電気化学デバイスの製造方法及び電気化学デバイス
JP2018-036193 2018-03-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022205192A1 (fr) * 2021-03-31 2022-10-06 宁德新能源科技有限公司 Appareil électrochimique et appareil électronique

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024085719A1 (fr) * 2022-10-21 2024-04-25 주식회사 엘지에너지솔루션 Ensemble électrode et dispositif électrochimique le comprenant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010157540A (ja) * 2008-12-26 2010-07-15 Jm Energy Corp 捲回型蓄電源
JP2010161249A (ja) * 2009-01-09 2010-07-22 Fdk Corp リチウムイオンキャパシタ
JP2010232265A (ja) * 2009-03-26 2010-10-14 Fuji Heavy Ind Ltd 蓄電デバイスおよびその製造方法
JP2012156405A (ja) * 2011-01-27 2012-08-16 Fdk Corp 蓄電デバイス

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010157540A (ja) * 2008-12-26 2010-07-15 Jm Energy Corp 捲回型蓄電源
JP2010161249A (ja) * 2009-01-09 2010-07-22 Fdk Corp リチウムイオンキャパシタ
JP2010232265A (ja) * 2009-03-26 2010-10-14 Fuji Heavy Ind Ltd 蓄電デバイスおよびその製造方法
JP2012156405A (ja) * 2011-01-27 2012-08-16 Fdk Corp 蓄電デバイス

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022205192A1 (fr) * 2021-03-31 2022-10-06 宁德新能源科技有限公司 Appareil électrochimique et appareil électronique

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