[go: up one dir, main page]

WO2018179079A1 - Batterie secondaire - Google Patents

Batterie secondaire Download PDF

Info

Publication number
WO2018179079A1
WO2018179079A1 PCT/JP2017/012576 JP2017012576W WO2018179079A1 WO 2018179079 A1 WO2018179079 A1 WO 2018179079A1 JP 2017012576 W JP2017012576 W JP 2017012576W WO 2018179079 A1 WO2018179079 A1 WO 2018179079A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
electrode layer
outer edge
insulator
electrolyte
Prior art date
Application number
PCT/JP2017/012576
Other languages
English (en)
Japanese (ja)
Inventor
由磨 五行
Original Assignee
日立化成株式会社
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 日立化成株式会社 filed Critical 日立化成株式会社
Priority to PCT/JP2017/012576 priority Critical patent/WO2018179079A1/fr
Publication of WO2018179079A1 publication Critical patent/WO2018179079A1/fr

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
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • 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 secondary battery.
  • a lithium ion secondary battery which is a kind of non-aqueous electrolyte secondary battery, has a high energy density and is therefore used as a power source for portable devices such as notebook computers and mobile phones.
  • Lithium ion secondary batteries are also used as power storage power supplies or electric vehicle power supplies, but lithium ion secondary batteries with high output are required for use in these applications.
  • a method for increasing the output of the lithium ion secondary battery is, for example, a method of connecting a plurality of unit cells in series. However, when the cells are connected in series, the outer body of the cells may become an electric resistance, and the output may be reduced. Moreover, when the number of series increases, the volume and weight of the exterior body which does not participate in charging / discharging increase, and an energy density may fall.
  • a bipolar battery in which a bipolar electrode having a positive electrode mixture layer on one surface of a current collector and a negative electrode mixture layer on the other surface and an electrolyte is proposed.
  • Patent Document 1 a bipolar battery in which a bipolar electrode having a positive electrode mixture layer on one surface of a current collector and a negative electrode mixture layer on the other surface and an electrolyte is proposed.
  • Patent Document 2 a bipolar battery using a solid electrolyte such as an inorganic solid electrolyte or an organic polymer solid electrolyte as an electrolyte layer has been proposed as means for suppressing the occurrence of liquid junction.
  • JP 2008-269972 A Japanese Patent Laid-Open No. 2000-1000047
  • an object of the present invention is to provide a secondary battery that can suppress the occurrence of a liquid junction due to contact between electrolyte layers and the occurrence of a short circuit due to contact between electrode layers.
  • the present invention provides a secondary battery comprising a first electrode layer, a first electrolyte layer, a bipolar electrode layer, a second electrolyte layer, and a second electrode layer in this order.
  • a second insulator layer provided adjacent to one of the second electrode layers, and the first insulator layer has a first through-hole penetrating in the stacking direction.
  • the second insulator layer has a second through-hole penetrating in the stacking direction, and when viewed from the stacking direction, the outer edge portion of the first insulator layer is the outer edge of the first electrolyte layer. And the outer edge of the first electrode layer or bipolar electrode layer adjacent to the first insulator layer, and the edge of the first through hole is The outer edge portion of the first electrolyte layer and the outer edge portion of the first electrode layer adjacent to the first insulator layer or the outer edge portion of the bipolar electrode layer are located on the inner side.
  • the outer edge of the electrolyte layer and the outer edge of the bipolar electrode layer or the second electrode layer adjacent to the second insulator layer, and the edge of the second through-hole is the second electrolyte layer And the bipolar electrode adjacent to the second insulator layer or the outer edge of the second electrode layer.
  • the first insulator layer and the second insulator layer have the first through hole and the second through hole, respectively, so that the electrolyte layer, the first electrode layer, An electrical connection between the bipolar electrode layer or the second electrode layer is ensured.
  • the insulators constituting the first insulator layer and the second insulator layer are the outer edges of the first electrode layer, the first electrolyte layer, the second electrolyte layer, or the second electrode layer, respectively. Are arranged so that no exposure of the portion to the bipolar electrode layer side or exposure of the outer edge portion of the bipolar electrode layer to the first electrode layer or the second electrode layer side occurs. The layers are difficult to touch. Therefore, in this secondary battery, the occurrence of a liquid junction due to contact between the electrolyte layers and the occurrence of a short circuit due to contact between the electrode layers can be suppressed.
  • the first insulator layer may be provided adjacent to the first electrolyte layer and the first electrode layer.
  • the insulator constituting the first insulator layer is formed such that the outer edge portion of the first electrode layer and the first electrolyte layer are not exposed so that the outer edge portion of the first electrode layer is not exposed to the bipolar electrode layer side.
  • the second insulator layer in the second aspect may be provided adjacent to the second electrolyte layer and the bipolar electrode layer.
  • the insulator constituting the second insulator layer is exposed to the first electrolyte layer side of the outer edge portion of the second electrolyte layer, and the second electrode layer side of the outer edge portion of the bipolar electrode layer.
  • the liquid crystal is caused by contact between the electrolyte layers and the electrode layer by being interposed between the outer edge of the second electrolyte layer and the outer edge of the bipolar electrode layer. Generation
  • production of the short circuit by mutual contact can be suppressed still more suitably.
  • the outer edge of the first electrolyte layer and the outer edge of the second electrolyte layer in the second aspect may be located inside the outer edge of the bipolar electrode layer.
  • the 1st electrode layer in a 1st aspect and a 2nd aspect may be a positive electrode layer
  • a 2nd electrode layer may be a negative electrode layer.
  • the first insulator layer in the first aspect is provided adjacent to the first electrolyte layer and the bipolar electrode layer, and the second insulator layer includes the second electrolyte layer and the second electrolyte layer. It may be provided adjacent to the bipolar electrode layer.
  • the insulator constituting the first insulator layer and the second insulator layer is exposed to the bipolar electrode layer side of the outer edge portion of the first electrolyte layer or the outer edge portion of the second electrolyte layer, and
  • the outer edge portion of the bipolar electrode layer is arranged so as not to be exposed to both the first electrode layer and the second electrode layer, the occurrence of liquid junction due to contact between the electrolyte layers, and the electrode Generation
  • the first insulator layer and the second insulator layer in each aspect described above may be independently formed of at least one selected from the group consisting of polyolefin and ceramic.
  • the present invention it is possible to provide a secondary battery capable of suppressing the occurrence of a liquid junction due to contact between electrolyte layers and the occurrence of a short circuit due to contact between electrode layers.
  • FIG. 1 It is a perspective view which shows the secondary battery which concerns on one Embodiment. It is a disassembled perspective view which shows one Embodiment of the electrode group of the secondary battery shown in FIG. It is a schematic cross section which shows one Embodiment of the electrode group of the secondary battery shown in FIG. It is a schematic cross section which shows other embodiment of an electrode group. It is a schematic cross section which shows other embodiment of an electrode group. It is a schematic cross section which shows other embodiment of an electrode group. It is a schematic cross section which shows other embodiment of an electrode group. It is a schematic cross section which shows other embodiment of an electrode group. It is a schematic cross section which shows other embodiment of an electrode group.
  • FIG. 1 is a perspective view showing a secondary battery according to an embodiment.
  • the secondary battery 1 includes an electrode group 2 including a positive electrode layer, a negative electrode layer, and an electrolyte layer, and a bag-shaped battery outer package 3 that houses the electrode group 2.
  • a positive electrode current collecting tab 4 and a negative electrode current collecting tab 5 are provided in the positive electrode layer and the negative electrode layer, respectively.
  • the positive electrode current collecting tab 4 and the negative electrode current collecting tab 5 protrude from the inside of the battery exterior body 3 to the outside so that the positive electrode layer and the negative electrode layer can be electrically connected to the outside of the secondary battery 1, respectively.
  • the battery outer package 3 may be formed of, for example, a laminate film.
  • the laminate film may be a laminate film in which a resin film such as a polyethylene terephthalate (PET) film, a metal foil such as aluminum, copper, and stainless steel, and a sealant layer such as polypropylene are laminated in this order.
  • PET polyethylene terephthalate
  • metal foil such as aluminum, copper, and stainless steel
  • sealant layer such as polypropylene
  • FIG. 2 is an exploded perspective view showing an embodiment of the electrode group 2 of the secondary battery 1 shown in FIG.
  • FIG. 3 is a schematic cross-sectional view showing an embodiment of the electrode group 2 of the secondary battery 1 shown in FIG.
  • the electrode group 2 ⁇ / b> A includes a positive electrode layer (first electrode layer) 6, a first insulator layer 7, a first electrolyte layer 8, and a bipolar electrode.
  • the layer 9, the second insulator layer 10, the second electrolyte layer 11, and the negative electrode layer (second electrode layer) 12 are provided in this order.
  • the positive electrode layer (first electrode layer) 6 includes a positive electrode current collector 13 and a positive electrode mixture layer 14 provided on the positive electrode current collector 13.
  • the positive electrode current collector 13 is provided with a positive electrode current collector tab 4.
  • the positive electrode current collector 13 is made of, for example, aluminum, stainless steel, titanium, or the like.
  • the thickness of the positive electrode current collector 13 is, for example, 10 to 100 ⁇ m.
  • the positive electrode mixture layer 14 contains, for example, a positive electrode active material, a conductive agent, and a binder.
  • the thickness of the positive electrode mixture layer 14 is, for example, 20 to 200 ⁇ m.
  • the positive electrode active material may be a lithium transition metal compound such as a lithium transition metal oxide or a lithium transition metal phosphate.
  • the lithium transition metal oxide may be lithium manganate, lithium nickelate, lithium cobaltate, or the like.
  • Lithium transition metal oxide is a part of transition metals such as Mn, Ni, Co, etc. contained in lithium manganate, lithium nickelate, lithium cobaltate, etc., one or more other transition metals, or A lithium transition metal oxide substituted with a metal element (typical element) such as Mg or Al may also be used.
  • Lithium transition metal phosphate is LiFePO 4 , LiMnPO 4 , LiMn x M 1-x PO 4 (0.3 ⁇ x ⁇ 1, M is Fe, Ni, Co, Ti, Cu, Zn, Mg and Zr) Or at least one element selected from the group).
  • the conductive agent may be carbon black, graphite, carbon fiber, carbon nanotube, or the like.
  • the binder is not limited as long as it does not decompose on the surface of the positive electrode layer 6.
  • the first electrolyte layer 8 and the second electrolyte layer 11 each contain, for example, a polymer, oxide particles, an ionic liquid, and an electrolyte.
  • the thicknesses of the first electrolyte layer 8 and the second electrolyte layer 11 are each 10 to 200 ⁇ m, for example.
  • the first electrolyte layer 8 and the second electrolyte layer 11 may be the same as or different from each other.
  • the polymer is, for example, a polymer having a first structural unit selected from the group consisting of ethylene tetrafluoride and vinylidene fluoride.
  • the polymer may be a copolymer further having a second structural unit selected from the group consisting of hexafluoropropylene, acrylic acid, maleic acid, ethyl methacrylate, and methyl methacrylate.
  • the polymer may comprise at least two types of polymers, a first polymer having a first structural unit and a second polymer having a second structural unit.
  • the oxide particles are, for example, Li, Na, Mg, Al, Si, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Rb, Sr, Y, Nb, Zr.
  • the average particle diameter of the oxide particles is, for example, 0.02 to 5 ⁇ m.
  • the anionic component of the ionic liquid includes halogen anions such as Cl ⁇ , Br ⁇ and I ⁇ , inorganic anions such as BF 4 ⁇ and N (SO 2 F) 2 ⁇ , B (C 6 H 5 ) 4 ⁇ , and CH 3.
  • Organic anions such as SO 3 ⁇ , CF 3 SO 3 ⁇ , N (C 4 F 9 SO 2 ) 2 ⁇ , N (SO 2 CF 3 ) 2 ⁇ , and N (SO 2 CF 2 CF 3 ) 2 — It's okay.
  • the cation component of the ionic liquid may be a chain quaternary ammonium cation, a piperidinium cation, a pyrrolidinium cation, an imidazolium cation, or the like.
  • Examples of the electrolyte include LiBF 4 , LiClO 4 , LiB (C 6 H 5 ) 4 , LiCH 3 SO 3 , LiCF 3 SO 3 , LiN (SO 2 F) 2 , LiN (SO 2 CF 3 ) 2 , LiN (SO 2 CF 2 CF 3) may be 2 such as lithium salt.
  • the negative electrode layer (second electrode layer) 12 includes a negative electrode current collector 15 and a negative electrode mixture layer 16 provided on the negative electrode current collector 15.
  • the negative electrode current collector 15 is provided with a negative electrode current collecting tab 5.
  • the negative electrode current collector 15 is made of, for example, copper, stainless steel, titanium, nickel, or the like.
  • the thickness of the negative electrode current collector 15 is, for example, 10 to 100 ⁇ m.
  • the negative electrode mixture layer 16 contains, for example, a negative electrode active material and a binder.
  • the thickness of the negative electrode mixture layer 16 is, for example, 10 to 200 ⁇ m.
  • the negative electrode active material examples include carbon-based materials (graphite and amorphous carbon), conductive polymer materials (for example, polyacene, polyparaphenylene, polyaniline, and polyacetylene), lithium composite oxides (for example, lithium titanate: Li 4 Ti 5 O 12,), metallic lithium, metal lithium alloyed (e.g., aluminum, silicon, or a tin).
  • the binder may be the same as the binder in the positive electrode mixture layer 14.
  • the bipolar electrode layer 9 includes a bipolar electrode current collector 17, a positive electrode mixture layer 14 provided on the surface of the bipolar electrode current collector 17 on the negative electrode layer 12 side, and a positive electrode layer 6 side of the bipolar electrode current collector 17. And a negative electrode mixture layer 16 provided on the surface.
  • the bipolar electrode layer 9 may be formed by providing each of the positive electrode mixture layer 14 and the negative electrode mixture layer 16 on the bipolar electrode current collector 17, or the positive electrode layer 6 and the negative electrode layer 12 may be connected to the positive electrode current collector. It may be formed by bonding the body 13 and the negative electrode current collector 15 so as to contact each other.
  • the bipolar electrode current collector 17 is made of, for example, a single metal such as aluminum, stainless steel, or titanium, or a clad material formed by rolling and joining aluminum and copper or stainless steel and copper.
  • the bipolar electrode current collector 17 may be formed by laminating the same material as the positive electrode current collector 13 and the same material as the negative electrode current collector 15 described above.
  • the thickness of the bipolar electrode current collector 17 is, for example, 10 to 100 ⁇ m.
  • the positive electrode mixture layer 14 and the negative electrode mixture layer 16 in the bipolar electrode layer 9 may be the same as the positive electrode mixture layer 14 in the positive electrode layer 6 and the negative electrode mixture layer 16 in the negative electrode layer 12, respectively.
  • the first insulator layer 7 is provided adjacent to and between the first electrode layer 6 and the first electrolyte layer 8.
  • the first insulator layer 7 includes a positive electrode layer (first electrode layer) 6, a first insulator layer 7, a first electrolyte layer 8, a bipolar electrode layer 9, a second insulator layer 10, and a second insulator layer 7.
  • the first through hole 18 penetrates in the laminating direction in which the electrolyte layer 11 and the negative electrode layer (second electrode layer) 12 are laminated (hereinafter simply referred to as “lamination direction”).
  • the planar shape of the first through-hole 18 (the shape when viewed from the stacking direction) is substantially similar to the planar shape of the first insulator layer 7 (substantially rectangular in this embodiment).
  • the first through hole 18 has a long side and a short side that form the outer edge portion 7 a of the first insulator layer 7 and a length that forms the edge portion 18 a of the first through hole 18 when viewed from the stacking direction.
  • the side and the short side are formed at substantially the center of the first insulator layer 7 so as to be substantially parallel to each other.
  • the ratio of the first through holes 18 in the first insulator layer 7 may be, for example, 25 to 99.5%.
  • the first insulator layer 7 is an insulator capable of electrical insulation, such as polyolefin, fluororesin (for example, a polymer of olefin containing fluorine atoms), polyamide such as polyacryl, polyimide, and aramid, ceramic ( Insulating material).
  • the first insulator layer 7 is preferably formed of at least one selected from the group consisting of polyolefin and ceramic.
  • the polyolefin is preferably polyethylene or polypropylene.
  • the second insulator layer 10 is provided adjacent to and between the bipolar electrode layer 9 and the second electrolyte layer 11.
  • the second insulator layer 10 has a second through hole 19 penetrating in the stacking direction.
  • the configurations of the second insulator layer 10 and the second through hole 19 may be the same as those of the first insulator layer 7 and the first through hole 18, respectively.
  • the outer edge portion 8a of the first electrolyte layer 8 is located on the inner side of the outer edge portion 9a of the bipolar electrode layer 9 when viewed from the stacking direction.
  • the outer edge portion 11 a of the second electrolyte layer 11 is located on the inner side of the outer edge portion 9 a of the bipolar electrode layer 9.
  • the outer edge portion 7 a of the first insulator layer 7 is positioned outside the outer edge portion 6 a of the first electrode layer 6 and the outer edge portion 8 a of the first electrolyte layer 8.
  • the edge 18 a of the first through hole 18 in the first insulator layer 7 is located inside the outer edge 6 a of the first electrode layer 6 and the outer edge 8 a of the first electrolyte layer 8.
  • the insulator constituting the first insulator layer 7 is formed so that the outer edge portion 6a of the first electrode layer 6 and the outer edge portion 6a of the first electrode layer 6 are not exposed to the bipolar electrode layer 9 side. It is interposed between the outer edge portion 8a of one electrolyte layer 8.
  • the first insulator layer 7 has the first through hole 18, the first electrode layer 6 and the first electrolyte layer 8 correspond to the first through hole 18. Allowing them to touch each other in position.
  • the outer edge portion 10a of the second insulator layer 10 is located outside the outer edge portion 9a of the bipolar electrode layer 9 and the outer edge portion 11a of the second electrolyte layer 11 when viewed from the stacking direction.
  • the edge 19 a of the second through hole 19 in the second insulator layer 10 is located inside the outer edge 9 a of the bipolar electrode layer 9 and the outer edge 11 a of the second electrolyte layer 11. That is, the insulator that constitutes the second insulator layer 10 is formed so that the outer edge portion 9a of the bipolar electrode layer 9 and the second edge portion 9a of the bipolar electrode layer 9 are not exposed to the second electrode layer 12 side. It is interposed between the outer edge portion 11 a of the electrolyte layer 11.
  • the bipolar electrode layer 9 and the second electrolyte layer 11 are located at positions corresponding to the second through hole 19. Allowing them to touch each other.
  • the first insulator layer 7 and the second insulator layer 10 have the first through hole 18 and the second through hole 19, respectively. This ensures electrical connection between the first electrode layer 6 and the first electrolyte layer 8 and between the bipolar electrode layer 9 and the second electrolyte layer 11.
  • the insulator constituting the first insulator layer 7 does not expose the outer edge 6a of the first electrode layer 6 to the bipolar electrode layer 9 side. By interposing between the outer edge portion 6a and the outer edge portion 8a of the first electrolyte layer 8, the first electrode layer 6 and the bipolar electrode layer 9 are difficult to contact each other.
  • the outer edge portion 9a of the bipolar electrode layer 9 prevents the insulator constituting the second insulator layer 10 from exposing the outer edge portion 9a of the bipolar electrode layer 9 to the second electrode layer 12 side.
  • the outer edge portion 11a of the second electrolyte layer 11 make it difficult for the bipolar electrode layer 9 and the second electrode layer 12 to contact each other. Therefore, in the secondary battery including the electrode group 2A shown in FIG. 3, the occurrence of a short circuit due to contact between the electrode layers between the first electrode layer 6 or the second electrode layer 12 and the bipolar electrode layer 9 is prevented. Can be suppressed.
  • the outer edge portion 8a of the first electrolyte layer 8 and the outer edge portion 11a of the second electrolyte layer 11 are located inside the outer edge portion 9a of the bipolar electrode layer 9 when viewed from the stacking direction.
  • the outer edge portion 8a of the first electrolyte layer 8 and the outer edge portion 11a of the second electrolyte layer 11 are the outer edge portion 9a of the bipolar electrode layer 9. It may be located on the outer side.
  • the first electrode layer 6 and the bipolar electrode layer 9 are respectively formed by the insulators constituting the first insulator layer 7 and the second insulator layer 10.
  • the bipolar electrode layer 9 and the second electrode layer 12 are difficult to contact each other. Therefore, even in the secondary battery including the electrode group 2B shown in FIG. 4, the occurrence of a short circuit due to the contact between the electrode layers between the first electrode layer 6 or the second electrode layer 12 and the bipolar electrode layer 9 occurs. Can be suppressed.
  • the bipolar electrode layer 9 prevents the insulator constituting the second insulator layer 10 from exposing the outer edge portion 11a of the second electrolyte layer 11 to the first electrolyte layer 8 side. Between the outer edge portion 9a of the second electrolyte layer 11 and the outer edge portion 11a of the second electrolyte layer 11. Therefore, in the secondary battery including the electrode group 2 ⁇ / b> B illustrated in FIG. 4, the occurrence of a liquid junction due to the contact between the electrolyte layers between the second electrolyte layer 11 and the first electrolyte layer 8 can be suppressed.
  • the electrode group 2A shown in FIG. 3 includes a positive electrode layer (first electrode layer) 6, a first insulator layer 7, a first electrolyte layer 8, a bipolar electrode layer 9, and a second insulator.
  • first electrode layer positive electrode layer
  • second electrode layer negative electrode layer
  • the stacking order with 11 may be interchanged with each other.
  • an electrode group 2C includes a positive electrode layer (first electrode layer) 6, a first insulator layer 7, a first electrolyte layer 8, and a bipolar layer.
  • An electrode layer 9, a second electrolyte layer 11, a second insulator layer 10, and a negative electrode layer (second electrode layer) 12 are provided in this order.
  • the outer edge portion 7 a of the first insulator layer 7 is the outer edge portion 6 a of the first electrode layer 6 and the first electrolyte layer 8.
  • the edge 18a of the first through-hole 18 in the first insulator layer 7 is located outside the outer edge 8a, and the outer edge 6a of the first electrode layer 6 and the outer edge of the first electrolyte layer 8 It is located inside the portion 8a.
  • the insulator constituting the first insulator layer 7 is formed so that the outer edge portion 6a of the first electrode layer 6 and the outer edge portion 6a of the first electrode layer 6 are not exposed to the bipolar electrode layer 9 side.
  • first insulator layer 7 has the first through hole 18, the first electrode layer 6 and the first electrolyte layer 8 correspond to the first through hole 18. Allowing them to touch each other in position.
  • the outer edge portion 10a of the second insulator layer 10 is positioned outside the outer edge portion 11a of the second electrolyte layer 11 and the outer edge portion 12a of the second electrode layer 12.
  • the edge 19a of the second through hole 19 in the second insulator layer 10 is located on the inner side of the outer edge 11a of the second electrolyte layer 11 and the outer edge 12a of the second electrode layer 12. Yes. That is, the insulator that constitutes the second insulator layer 10 is separated from the outer edge portion 11a of the second electrolyte layer 11 and the second electrode layer 12 so that the outer edge portion 12a of the second electrode layer 12 is not exposed to the bipolar electrode layer 9 side.
  • the second insulator layer 10 includes the second through hole 19
  • the second electrolyte layer 11 and the second electrode layer 12 correspond to the second through hole 19. Allowing them to touch each other in position.
  • the insulator constituting the first insulator layer 7 is exposed to the bipolar electrode layer 9 side of the outer edge portion 6a of the first electrode layer 6.
  • the outer edge of the second electrolyte layer 11 is prevented so that the insulator constituting the second insulator layer 10 does not expose the outer edge 12a of the second electrode layer 12 to the bipolar electrode layer 9 side.
  • the second electrode layer 12 and the bipolar electrode layer 9 are difficult to contact each other. Therefore, even in the secondary battery including the electrode group 2 ⁇ / b> C shown in FIG. 5, a short circuit occurs due to contact between the electrode layers between the first electrode layer 6 or the second electrode layer 12 and the bipolar electrode layer 9. Can be suppressed.
  • the electrode group 2A shown in FIG. 3 includes a positive electrode layer (first electrode layer) 6, a first insulator layer 7, a first electrolyte layer 8, a bipolar electrode layer 9, and a second insulator.
  • first electrode layer positive electrode layer
  • second electrode layer negative electrode layer
  • the stacking order with 8 may be interchanged.
  • an electrode group 2D includes a positive electrode layer (first electrode layer) 6, a first electrolyte layer 8, a first insulator layer 7, and a bipolar layer.
  • the electrode layer 9, the second insulator layer 10, the second electrolyte layer 11, and the negative electrode layer (second electrode layer) 12 are provided in this order.
  • the outer edge portion 7a of the first insulator layer 7 when viewed from the stacking direction, includes the outer edge portion 8a of the first electrolyte layer 8 and the outer edge portion of the bipolar electrode layer 9.
  • the edge 18a of the first through hole 18 in the first insulator layer 7 is located outside of the outer edge 9a of the first electrolyte layer 8 and the outer edge 9a of the bipolar electrode layer 9. Is located.
  • the insulator constituting the first insulator layer 7 is bipolar with the outer edge portion 8a of the first electrolyte layer 8 so that the outer edge portion 9a of the bipolar electrode layer 9 is not exposed to the first electrode layer 6 side.
  • the first electrolyte layer 8 and the bipolar electrode layer 9 are located at positions corresponding to the first through hole 18. Allowing them to touch each other.
  • the outer edge portion 10a of the second insulator layer 10 is located outside the outer edge portion 9a of the bipolar electrode layer 9 and the outer edge portion 11a of the second electrolyte layer 11 when viewed from the stacking direction.
  • the edge 19 a of the second through hole 19 in the second insulator layer 10 is located inside the outer edge 9 a of the bipolar electrode layer 9 and the outer edge 11 a of the second electrolyte layer 11. That is, the insulator that constitutes the second insulator layer 10 is formed so that the outer edge portion 9a of the bipolar electrode layer 9 and the second edge portion 9a of the bipolar electrode layer 9 are not exposed to the second electrode layer 12 side. It is interposed between the outer edge portion 11 a of the electrolyte layer 11.
  • the bipolar electrode layer 9 and the second electrolyte layer 11 are located at positions corresponding to the second through hole 19. Allowing them to touch each other.
  • the insulator constituting the first insulator layer 7 and the insulator constituting the second insulator layer 10 are respectively the outer edges of the bipolar electrode layer 9.
  • the bipolar electrode layer 9 and the outer edge portion 8a of the first electrolyte layer 8, the outer edge portion 11a of the second electrolyte layer 11, and the bipolar electrode layer 9 so that the portion 9a is not exposed to the first electrode layer 6 side and the second electrode layer 12 side.
  • the bipolar electrode layer 9 and the first electrode layer 6 or the second electrode layer 12 are difficult to contact each other. Therefore, even in the secondary battery including the electrode group 2D shown in FIG. 6, the occurrence of a short circuit due to the contact between the electrode layers between the first electrode layer 6 or the second electrode layer 12 and the bipolar electrode layer 9 is prevented. Can be suppressed.
  • the outer edge portion 8a of the first electrolyte layer 8 and the outer edge portion 11a of the second electrolyte layer 11 are located inside the outer edge portion 9a of the bipolar electrode layer 9 when viewed from the stacking direction.
  • the outer edge portion 8a of the first electrolyte layer 8 and the outer edge portion 11a of the second electrolyte layer 11 are bipolar electrode layers. 9 may be located outside the outer edge portion 9a.
  • the bipolar electrode layer 9 and the first insulating layer 7 are separated by the insulator constituting the first insulator layer 7 and the insulator constituting the second insulator layer 10.
  • the electrode layer 6 or the second electrode layer 12 is difficult to contact each other. Therefore, even in the secondary battery including the electrode group 2E shown in FIG. 7, the occurrence of a short circuit due to the contact between the electrode layers between the first electrode layer 6 or the second electrode layer 12 and the bipolar electrode layer 9 is prevented. Can be suppressed.
  • the insulators that constitute the first insulator layer 7 and the second insulator layer 10 are the outer edge portion 8a of the first electrolyte layer 8 and the second electrolyte layer 11, respectively. Between the outer edge portion 9a of the bipolar electrode layer 9 and the outer edge portion 8a of the first electrolyte layer 8, and between the outer edge portion 9a of the bipolar electrode layer 9 and the second electrolyte layer so that the outer edge portion 11a does not contact each other. 11 between the outer edge portion 11a and the outer edge portion 11a. Therefore, in the secondary battery including the electrode group 2 ⁇ / b> E illustrated in FIG. 7, the occurrence of a liquid junction due to the contact between the electrolyte layers between the first electrolyte layer 8 and the second electrolyte layer 11 can be suppressed.
  • the electrode group 2A shown in FIG. 3 includes a positive electrode layer (first electrode layer) 6, a first insulator layer 7, a first electrolyte layer 8, a bipolar electrode layer 9, and a second insulator.
  • the layer 10, the second electrolyte layer 11, and the negative electrode layer (second electrode layer) 12 were provided in this order, in other embodiments, as in the electrode group 2F shown in FIG.
  • an electrode group 2F includes a positive electrode layer (first electrode layer) 6, a first insulator layer 7, a first electrolyte layer 8, 1 bipolar electrode layer 9, third insulator layer 20, third electrolyte layer 21, second bipolar electrode layer 22, second insulator layer 10, second electrolyte layer 11, And a negative electrode layer (second electrode layer) 12 in this order.
  • the configuration of the second bipolar electrode layer 22 may be the same as that of the first bipolar electrode layer 9, and is provided on the surface of the bipolar electrode current collector 17 and the negative electrode layer 12 side of the bipolar electrode current collector 17.
  • a positive electrode mixture layer 14 and a negative electrode mixture layer 16 provided on the surface of the bipolar electrode current collector 17 on the first bipolar electrode layer 9 side are provided.
  • the configuration of the third electrolyte layer 21 may be the same as that of the first electrolyte layer 8 and the second electrolyte layer 11.
  • the third insulator layer 20 is provided adjacent to and between the first bipolar electrode layer 9 and the third electrolyte layer 21.
  • the third insulator layer 20 has a third through hole 23 that penetrates in the stacking direction.
  • the third insulator layer 20 may have the same configuration as the first insulator layer 7 and the second insulator layer 10, and the third through hole 23 includes the first through hole 18 and the second insulator layer 20.
  • the same structure as the through-hole 19 may be used.
  • the outer edge portion 21a of the third electrolyte layer 21 when viewed from the stacking direction, includes the outer edge portion 9a of the first bipolar electrode layer 9 and the second bipolar electrode layer. 22 is located inside the outer edge 22a.
  • the outer edge portion 8 a of the first electrolyte layer 8 when viewed from the stacking direction, is located inside the outer edge portion 9 a of the first bipolar electrode layer 9, and the outer edge of the second electrolyte layer 11.
  • the part 11 a is located inside the outer edge part 22 a of the second bipolar electrode layer 22.
  • the outer edge portion 20a of the third insulator layer 20 is positioned outside the outer edge portion 9a of the first bipolar electrode layer 9 and the outer edge portion 21a of the third electrolyte layer 21.
  • the edge 23 a of the third through-hole 23 in the third insulator layer 20 is located inside the outer edge 9 a of the first bipolar electrode layer 9 and the outer edge 21 a of the third electrolyte layer 21. is doing. That is, the insulator constituting the third insulator layer 20 is formed so that the outer edge portion 9a of the first bipolar electrode layer 9 is not exposed to the second bipolar electrode layer 22 side.
  • the third insulator layer 20 has the third through hole 23
  • the first bipolar electrode layer 9 and the third electrolyte layer 21 correspond to the third through hole 23. It is possible to contact each other at the position to be.
  • the positional relationship between the second insulator layer 10 and the second bipolar electrode layer 22 is the same as the positional relationship between the second insulator layer 10 and the bipolar electrode 9 in the electrode group 2A shown in FIG. is there.
  • the third insulator layer 20 has the third through-hole 23 as in the above-described embodiment, so that the first bipolar electrode layer 9 and the second The electrical connection between the three electrolyte layers 21 is ensured.
  • the first bipolar electrode is formed such that the insulator constituting the third insulator layer 20 does not expose the outer edge portion 9a of the first bipolar electrode layer 9 to the second bipolar electrode layer 22 side. It is interposed between the outer edge portion 9 a of the layer 9 and the outer edge portion 21 a of the third electrolyte layer 21. This makes it difficult for the first bipolar electrode layer 9 and the second bipolar electrode layer 22 to contact each other. Therefore, even in a secondary battery including the electrode group 2F shown in FIG. 8, occurrence of a short circuit due to contact between the electrode layers can be suppressed.
  • each layer constituting the electrode group 2 is a substantially rectangular shape, but the planar shape of each layer constituting the electrode group is another shape such as a substantially square shape or a substantially circular shape. Also good.
  • the planar shape of the 1st through-hole 18, the 2nd through-hole 19, and the 3rd through-hole 23 is the 1st insulator layer 7, the 2nd insulator layer 10, and the 3rd insulation, respectively.
  • the planar shape of the body layer 20 was substantially similar to that of the body layer 20, but the planar shapes of the first through hole, the second through hole, and the third through hole were the first insulator layer and the second insulator, respectively.
  • the shape may be different from the planar shape of the layer and the third insulator layer.
  • the 1st insulator layer 7, the 2nd insulator layer 10, and the 3rd insulator layer 20 are respectively the 1st through-hole 18, the 2nd through-hole 19, and the 3rd through-hole.
  • the first insulator layer, the second insulator layer, and the third insulator layer have the first through hole, the second through hole, and the third through hole, respectively. You may have two or more.
  • the first electrode layer 6 is a positive electrode layer and the second electrode layer 12 is a negative electrode layer.
  • the first electrode layer is a negative electrode layer and the second electrode layer is a positive electrode layer. It may be.
  • the bipolar electrode layer 9 (the first bipolar electrode layer 9 and the second bipolar electrode layer 22 in the electrode group 2F) has a configuration in which the positive electrode mixture layer 14 and the negative electrode mixture layer 16 are interchanged. .
  • SYMBOLS 1 ... Secondary battery 6 ... 1st electrode layer (positive electrode layer), 6a ... Outer edge part of 1st electrode layer, 7 ... 1st insulator layer, 7a ... Outer edge part of 1st insulator layer, DESCRIPTION OF SYMBOLS 8 ... 1st electrolyte layer, 8a ... Outer edge part of 1st electrolyte layer, 9 ... Bipolar electrode layer, 9a ... Outer edge part of bipolar electrode layer, 10 ... 2nd insulator layer, 10a ... 2nd insulator Layer outer edge, 11 ... second electrolyte layer, 11a ... second electrolyte layer outer edge, 12 ... second electrode layer (negative electrode layer), 12a ... second electrode layer outer edge, 18 ... first 1 through-hole, 18a... Edge of first through-hole, 19... Second through-hole, 19a... Edge of second through-hole.

Landscapes

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

Abstract

La présente invention concerne une batterie secondaire qui est équipée d'une première couche d'électrode (6), d'une première couche d'électrolyte (8), d'une couche d'électrode bipolaire (9), d'une seconde couche d'électrolyte (11) et d'une seconde couche d'électrode (12) dans cet ordre. La batterie secondaire est également équipée : d'une première couche de matériau isolant (7) qui est disposée adjacente à la première couche d'électrolyte (8) et similaire; et d'une seconde couche de matériau isolant (10) qui est disposée adjacente à la seconde couche d'électrolyte (11) et similaire. La première couche de matériau isolant (7) présente un premier trou traversant (18), la seconde couche de matériau isolant (10) comporte un second trou traversant (19), une partie d'extrémité externe (7a) de la première couche de matériau isolant (7) est positionnée davantage vers le côté externe qu'une partie d'extrémité externe (8a) de la première couche d'électrolyte (8), et similaire, une partie d'extrémité (18a) du premier trou traversant (18) est positionnée davantage vers le côté interne que la partie d'extrémité externe (8a) de la première couche d'électrolyte (8), et similaire, une partie d'extrémité externe (10a) de la seconde couche de matériau isolant (10) est positionnée davantage vers le côté externe qu'une partie d'extrémité externe (11a) de la seconde couche d'électrolyte (11), et similaire, et une partie d'extrémité (19a) du second trou traversant (19) est positionnée davantage vers le côté interne que la partie d'extrémité externe (11a) de la seconde couche d'électrolyte (11), et similaire.
PCT/JP2017/012576 2017-03-28 2017-03-28 Batterie secondaire WO2018179079A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/012576 WO2018179079A1 (fr) 2017-03-28 2017-03-28 Batterie secondaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/012576 WO2018179079A1 (fr) 2017-03-28 2017-03-28 Batterie secondaire

Publications (1)

Publication Number Publication Date
WO2018179079A1 true WO2018179079A1 (fr) 2018-10-04

Family

ID=63674606

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/012576 WO2018179079A1 (fr) 2017-03-28 2017-03-28 Batterie secondaire

Country Status (1)

Country Link
WO (1) WO2018179079A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08506926A (ja) * 1993-02-24 1996-07-23 トロジャン バッテリー カンパニー 電極板構造物
JP2004134116A (ja) * 2002-10-08 2004-04-30 Nissan Motor Co Ltd バイポーラ電池
JP2006210002A (ja) * 2005-01-25 2006-08-10 Nissan Motor Co Ltd 電池用電極
WO2012164642A1 (fr) * 2011-05-27 2012-12-06 トヨタ自動車株式会社 Batterie bipolaire entièrement monolithique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08506926A (ja) * 1993-02-24 1996-07-23 トロジャン バッテリー カンパニー 電極板構造物
JP2004134116A (ja) * 2002-10-08 2004-04-30 Nissan Motor Co Ltd バイポーラ電池
JP2006210002A (ja) * 2005-01-25 2006-08-10 Nissan Motor Co Ltd 電池用電極
WO2012164642A1 (fr) * 2011-05-27 2012-12-06 トヨタ自動車株式会社 Batterie bipolaire entièrement monolithique

Similar Documents

Publication Publication Date Title
JP7070052B2 (ja) 全固体電池
JP5451694B2 (ja) 非水電解質電池モジュール
WO2018154989A1 (fr) Pile rechargeable et son procédé de fabrication
JP7405243B2 (ja) 集電体、蓄電素子及び蓄電モジュール
JP7215570B2 (ja) 二次電池
WO2020218214A1 (fr) Batterie secondaire
US20200343560A1 (en) Secondary battery electrode, method for manufacturing same, and secondary battery
CN115668597A (zh) 二次电池及其制造方法
WO2020256023A1 (fr) Batterie secondaire
US20210288351A1 (en) Secondary battery
US20210020895A1 (en) Secondary battery and manufacturing method thereof
US20200295348A1 (en) Negative electrode for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery using the same
US20190074535A1 (en) Secondary battery
KR102134650B1 (ko) 이차전지
JP7130920B2 (ja) 非水電解液二次電池、非水電解液二次電池の設計方法及び非水電解液二次電池の製造方法
US20200295397A1 (en) Lithium secondary battery
JP2021099949A (ja) 全固体電池
WO2018179079A1 (fr) Batterie secondaire
WO2022168835A1 (fr) Cellule électrochimique
WO2017208531A1 (fr) Batterie rechargeable
US20200328476A1 (en) Secondary battery
WO2021006161A1 (fr) Batterie secondaire
WO2018154987A1 (fr) Batterie rechargeable et procédé permettant de produire cette dernière
WO2018155035A1 (fr) Batterie au lithium-ion
WO2018131377A1 (fr) Cellule secondaire

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: 17903297

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: 17903297

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP