WO2015133066A1 - 薄型電池および電池搭載デバイス - Google Patents
薄型電池および電池搭載デバイス Download PDFInfo
- Publication number
- WO2015133066A1 WO2015133066A1 PCT/JP2015/000625 JP2015000625W WO2015133066A1 WO 2015133066 A1 WO2015133066 A1 WO 2015133066A1 JP 2015000625 W JP2015000625 W JP 2015000625W WO 2015133066 A1 WO2015133066 A1 WO 2015133066A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- active material
- material layer
- electrode
- thin battery
- negative electrode
- Prior art date
Links
- 239000011149 active material Substances 0.000 claims abstract description 132
- 239000011255 nonaqueous electrolyte Substances 0.000 claims abstract description 104
- 239000007773 negative electrode material Substances 0.000 claims description 42
- 239000011230 binding agent Substances 0.000 claims description 20
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical group FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 claims description 19
- 239000007774 positive electrode material Substances 0.000 description 33
- 238000004519 manufacturing process Methods 0.000 description 14
- 238000005452 bending Methods 0.000 description 13
- 238000009826 distribution Methods 0.000 description 12
- -1 polyethylene Polymers 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 239000011148 porous material Substances 0.000 description 11
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 239000004952 Polyamide Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 229920002647 polyamide Polymers 0.000 description 8
- 239000002033 PVDF binder Substances 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 230000014759 maintenance of location Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 7
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 5
- 239000006258 conductive agent Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 239000005001 laminate film Substances 0.000 description 4
- 229910003002 lithium salt Inorganic materials 0.000 description 4
- 159000000002 lithium salts Chemical class 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229920005569 poly(vinylidene fluoride-co-hexafluoropropylene) Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- MIZLGWKEZAPEFJ-UHFFFAOYSA-N 1,1,2-trifluoroethene Chemical group FC=C(F)F MIZLGWKEZAPEFJ-UHFFFAOYSA-N 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
- 229910014211 My O Inorganic materials 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000006230 acetylene black Substances 0.000 description 2
- 239000003125 aqueous solvent Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- HEPLMSKRHVKCAQ-UHFFFAOYSA-N lead nickel Chemical compound [Ni].[Pb] HEPLMSKRHVKCAQ-UHFFFAOYSA-N 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229910018871 CoO 2 Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910013684 LiClO 4 Inorganic materials 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- IZJSTXINDUKPRP-UHFFFAOYSA-N aluminum lead Chemical compound [Al].[Pb] IZJSTXINDUKPRP-UHFFFAOYSA-N 0.000 description 1
- 210000003423 ankle Anatomy 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 235000019241 carbon black Nutrition 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 150000005678 chain carbonates Chemical class 0.000 description 1
- 239000006231 channel black Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 150000005676 cyclic carbonates Chemical class 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 239000006232 furnace black Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 150000002898 organic sulfur compounds Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000233 poly(alkylene oxides) Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920005559 polyacrylic rubber Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical class [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000006234 thermal black Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
-
- 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
- H01M10/0436—Small-sized flat cells or batteries for portable equipment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
- H01M4/623—Binders being polymers fluorinated polymers
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
- H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
- H01M50/133—Thickness
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
- H01M6/16—Cells with non-aqueous electrolyte with organic electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a thin battery including a sheet-like electrode group, a non-aqueous electrolyte impregnated in the electrode group, and an exterior body for hermetically storing them, and a battery-mounted device on which the thin battery is mounted.
- one aspect of the present invention is A sheet-like electrode group, a non-aqueous electrolyte impregnated in the electrode group, and an exterior body that hermetically stores the electrode group and the non-aqueous electrolyte,
- the electrode group includes a pair of first electrodes disposed on the outermost side of the electrode group, a second electrode disposed between the pair of first electrodes, the first electrode, and the second electrode.
- the first electrode includes a first active material layer attached to one surface of the first current collector sheet and the first current collector sheet;
- the second electrode includes a second active material layer having a polarity different from that of the first electrode and attached to both surfaces of the second current collector sheet and the second current collector sheet,
- a thin battery in which the content x per unit area of the non-aqueous electrolyte contained in the first active material layer is larger than the content y per unit area of the non-aqueous electrolyte contained in the second active material layer about.
- Another aspect of the present invention includes the above thin battery and a flexible electronic device driven by power supply from the thin battery, and the thin battery and the electronic device are integrated.
- the present invention relates to a battery-equipped device that is made into a sheet.
- One aspect of the present invention relates to a thin battery including a sheet-like electrode group, a nonaqueous electrolyte impregnated in the electrode group, and an exterior body that hermetically stores the electrode group and the nonaqueous electrolyte.
- the electrode group is disposed between the pair of first electrodes disposed on the outermost side of the electrode group, the second electrode disposed between the pair of first electrodes, and the first electrode and the second electrode.
- the separator is provided.
- the first electrode includes a first active material layer attached to one surface of the first current collector sheet and the first current collector sheet.
- the second electrode includes a second active material layer having a polarity different from that of the first electrode and attached to both surfaces of the second current collector sheet and the second current collector sheet.
- the content x per unit area of the nonaqueous electrolyte contained in the first active material layer is larger than the content y per unit area of the nonaqueous electrolyte contained in the second active material layer.
- the contents x and y are not included in the active material layer according to the projected area (S) of each active material layer viewed from the normal direction (direction perpendicular to the surface direction of the current collector sheet). It is a value (W / S or V / S) obtained by dividing the mass (W) or volume (V) of the water electrolysis mass.
- the mobility of the non-aqueous electrolyte in the first active material layer arranged at the outermost part of the electrode group usually increases.
- the non-aqueous electrolyte impregnated in the first active material layer gradually decreases, and the progress of the battery reaction is hindered due to the shortage of the non-aqueous electrolyte.
- the first active material layer can be used even after repeated bending. A sufficient amount of the non-aqueous electrolyte impregnated in the material layer can be ensured. Therefore, the capacity close to the initial battery capacity can be maintained even after repeated bending.
- the content x per unit area of the non-aqueous electrolyte contained in the first active material layer and the content y per unit area of the non-aqueous electrolyte contained in the second active material layer are 1.1 ⁇ x / y It is preferable to satisfy ⁇ 8. This further facilitates securing the amount of the nonaqueous electrolyte impregnated in the first active material layer after repeated bending.
- the thin battery having the simplest structure includes a pair of first electrodes disposed at the outermost part of the electrode group, a second electrode disposed between the pair of first electrodes, a first electrode, And a separator interposed between the two electrodes. That is, the electrode group includes two first electrodes, one second electrode, and a separator (first electrode / second electrode / first electrode).
- the thin battery having another structure includes two or more second electrodes, and further includes one or more third electrodes disposed between the pair of second electrodes.
- the third electrode includes a third active material layer having the same polarity as the first electrode and attached to both surfaces of the third current collector sheet and the third current collector sheet.
- the second electrode and the third electrode are alternately arranged.
- a third electrode (same polarity as the first electrode) is disposed at the center of the electrode group.
- the third electrode is disposed between the pair of second electrodes.
- the pair of first electrodes sandwich the stacked body of the second electrode and the third electrode (first electrode / second electrode / third electrode / second electrode / first electrode).
- the content x per unit area of the nonaqueous electrolyte contained in the first active material layer and the content z per unit area of the nonaqueous electrolyte contained in the third active material layer satisfy z ⁇ x. . That is, the content x per unit area of the nonaqueous electrolyte contained in the first active material layer is always the maximum, but may be the same as the content z. Thereby, even when the number of stacked electrodes included in the electrode group is increased, the depletion of the nonaqueous electrolyte in the vicinity of the center of the electrode group is prevented. Moreover, it becomes easy to control the distribution of the nonaqueous electrolyte in the entire electrode group.
- the content z per unit area of the nonaqueous electrolyte contained in the third active material layer is larger than the content y per unit area of the nonaqueous electrolyte contained in the second active material layer, that is, y ⁇ z is satisfied. It is preferable that Accordingly, the first active material layer or the third active material layer having a large nonaqueous electrolyte content is disposed on both sides of the second active material layer having a small nonaqueous electrolyte content. Therefore, it becomes easier to control the distribution of the nonaqueous electrolyte in the entire electrode group.
- a thin battery having another structure may include n second electrodes (n is an integer of 2 or more) and n ⁇ 1 third electrodes.
- n 3
- the second electrode is arranged at the center of the electrode group.
- the center second electrode is disposed between the pair of third electrodes.
- the laminated body of the center second electrode and the pair of third electrodes sandwiching the center second electrode is sandwiched by the pair of second electrodes and further sandwiched by the pair of first electrodes (first electrode / second electrode / second electrode). 3 electrode / second electrode / third electrode / second electrode / first electrode).
- the porosity A of the first active material layer is preferably 20 to 80%. This makes it easier for the first active material layer to be impregnated with more nonaqueous electrolyte.
- the porosity B of the second active material layer is preferably smaller than the porosity A. Thereby, it becomes easy to control the distribution of the nonaqueous electrolyte in the electrode group so as to satisfy y ⁇ x.
- the 1st electrode has a 1st active material layer only in one surface of a 1st electrical power collector sheet
- the first active material layer includes a negative electrode active material and a binder.
- the binder is preferably a fluororesin containing a vinylidene fluoride unit.
- a fluororesin containing a vinylidene fluoride unit tends to retain a nonaqueous electrolyte. Therefore, the non-aqueous electrolyte is easily held in the first active material layer, and it is easier to satisfy y ⁇ x.
- At least a part of the nonaqueous electrolyte contained in the first active material layer is in a gel form. Thereby, the outflow of the nonaqueous electrolyte from the first active material layer is suppressed, and the capacity can be easily maintained even after repeated bending. In addition, even when the first electrode arranged at the outermost part of the electrode group is impregnated with a large amount of nonaqueous electrolyte, liquid leakage hardly occurs.
- the area of the first active material layer is larger than the area of the second active material layer. Therefore, it becomes easier to distribute more nonaqueous electrolyte to the 1st electrode located in the outermost part of an electrode group.
- Another aspect of the present invention includes a thin battery and a flexible electronic device driven by power supply from the thin battery, and the thin battery and the electronic device are integrated into a sheet. It relates to a battery-mounted device. Since such a battery-mounted device hardly deteriorates even after being repeatedly bent, the life of the device can be extended.
- Electronic devices that are integrated into a sheet with a thin battery include, for example, a bio-applied device or a wearable mobile terminal, a mobile phone, a voice recording / playback device, a wristwatch, a video and still image camera, a liquid crystal display, Calculators, IC cards, temperature sensors, hearing aids, pressure-sensitive buzzers, etc.
- the bio-applied device is required to be flexible because it is used in close contact with a living body.
- the biological sticking type device include a biological information measuring device and an iontophoresis transdermal dosage device.
- the thickness of the thin battery is not particularly limited, but considering flexibility, it is preferably 3 mm or less, and more preferably 2 mm or less.
- the thickness of the sheet-like battery-mounted device may be thicker than that of the thin battery, but is preferably 3 mm or less from the same viewpoint. However, if both the thickness of the thin battery and the battery-mounted device are about 5 mm or less, relatively good flexibility can be obtained. It is technically difficult to make these thicknesses extremely small, and the lower limit of the thickness is, for example, 50 ⁇ m.
- FIG. 1 is a perspective view showing an example of a battery-equipped device 42 that includes a biological information measuring device as an electronic device.
- FIG. 2 shows an example of the appearance when the device is deformed.
- the biological information measuring device 40 includes a sheet-like holding member 41 that holds the constituent elements and the thin battery.
- the holding member 41 is made of a flexible material.
- elements such as a temperature sensor 43, a pressure sensitive element 45, a storage unit 46, an information transmission unit 47, a button switch SW1, and a control unit 48 are embedded.
- the thin battery 21 is accommodated in a flat space provided inside the holding member 41. That is, the thin battery 21 and the biological information measuring device 40 are integrally formed into a sheet and constitute a battery-mounted device 42.
- an insulating resin material can be used for the holding member 41.
- an adhesive 49 having adhesive strength to one main surface of the battery-mounted device 42
- the battery-mounted device 42 can be wound around the wrist, ankle, neck, or the like of the user.
- the temperature sensor 43 is configured using, for example, a thermosensitive element such as a thermistor or a thermocouple, and outputs a signal indicating the user's body temperature to the control unit 48.
- the pressure sensitive element 45 outputs a signal indicating the user's blood pressure and pulse to the control unit 48.
- a nonvolatile memory can be used as the storage unit 46 that stores information corresponding to the output signal.
- the information transmission unit 47 converts necessary information into a radio wave according to a signal from the control unit 48 and radiates it.
- the switch SW1 is used when the biological information measuring device 40 is switched on and off.
- the temperature sensor 43, the pressure sensitive element 45, the storage unit 46, the information transmission unit 47, the switch SW1 and the control unit 48 are attached to, for example, a flexible substrate and are electrically connected by a wiring pattern formed on the substrate surface. .
- the control unit 48 includes a CPU (Central Processing Unit) that executes predetermined arithmetic processing, a ROM (Read Only Memory) that stores a control program for the device, and a RAM (Random Access Memory) that temporarily stores data. These peripheral circuits are provided, and the operation of each part of the biological information measuring device 40 is controlled by executing a control program stored in the ROM.
- CPU Central Processing Unit
- ROM Read Only Memory
- RAM Random Access Memory
- FIG. 3 is a plan view of an example of a thin battery
- FIG. 4 is a longitudinal sectional view conceptually showing an example of an electrode group having the simplest structure included in the thin battery. 4 corresponds to a cross-sectional view taken along the line IV-IV of the thin battery shown in FIG.
- the thin battery 100 includes an electrode group 103, a non-aqueous electrolyte (not shown), and an exterior body 108 that houses them.
- the electrode group 103 includes a pair of first electrodes 110 located outside, a second electrode 120 disposed therebetween, and a separator 107 interposed between the first electrode 110 and the second electrode 120.
- the first electrode 110 includes a first current collector sheet 111 and a first active material layer 112 attached to one surface thereof.
- the second electrode 120 includes a second current collector sheet 121 and a second active material layer 122 attached to both surfaces.
- the pair of first electrodes 110 are arranged with the second electrode 120 sandwiched so that the first active material layer 112 and the second active material layer 122 face each other with the separator 107 interposed therebetween.
- a first lead 113 is connected to the first current collector sheet 111, and a second lead 123 is connected to the second current collector sheet 121.
- One end portions of the first lead 113 and the second lead 123 are led out from the exterior body 108, and the end portions function as external terminals of the positive electrode or the negative electrode.
- a sealing material may be interposed between the exterior body 108 and each lead in order to improve the sealing performance.
- a thermoplastic resin can be used as the sealing material.
- the content x per unit area of the non-aqueous electrolyte contained in the first active material layer 112 arranged on the outside is not included in the second active material layer 122 arranged on the inside.
- the content per unit area of the water electrolyte is larger than y.
- the content x per unit area of the nonaqueous electrolyte contained in the first active material layer 112 and the content y per unit area of the nonaqueous electrolyte contained in the second active material layer 122 are in a relationship of y ⁇ x.
- 1.1 ⁇ x / y ⁇ 8 is preferably satisfied, 2 ⁇ x / y ⁇ 8 is more preferable, and 3 ⁇ x / y ⁇ 8 is more preferable. This makes it easier to ensure the amount of the non-aqueous electrolyte impregnated in the first active material layer even after repeated bending.
- FIG. 5 is a longitudinal sectional view conceptually showing an example of an electrode group having a second simple structure included in the thin battery.
- the electrode group 203 is disposed between the pair of first electrodes 210 located on the outermost side, the pair of second electrodes 220 disposed between them, and the pair of second electrodes 220 (that is, the center). And a separator 207 interposed between electrodes of different polarities.
- the first electrode 210 and the third electrode 230 have the same polarity.
- the configurations of the first electrode 210 and the second electrode 220 are the same as in the first embodiment. That is, the first electrode 210 includes the first current collector sheet 211 and the first active material layer 212 attached to one surface thereof, and the second electrode 220 includes the second current collector sheet 221 and the surfaces of both of them. A second active material layer 222 attached to the substrate.
- the third electrode 230 can have the same configuration as the first electrode 210 except that the third electrode 230 has active material layers on both sides, and the third active material layer attached to the surface of the third current collector sheet 231 and both of them. 232 included.
- a first lead 213 is connected to the first current collector sheet 211, a second lead 223 is connected to the second current collector sheet 221, and a third lead (not shown) is connected to the third current collector sheet 231. ) Is connected. Since the third lead has the same polarity as the first lead 213, the third lead is connected to the first lead 213 inside the exterior body 208. One end portions of the first lead 213 and the second lead 223 are led out from the exterior body 208, and the end portions function as positive or negative external terminals.
- the content x per unit area of the nonaqueous electrolyte contained in the outermost first active material layer 212 and the unit area of the nonaqueous electrolyte contained in the second active material layer 222 The relationship with the per content y is the same as in the first embodiment.
- the content x per unit area of the nonaqueous electrolyte contained in the first active material layer 212 and the content z per unit area of the nonaqueous electrolyte contained in the third active material layer 232 are z ⁇ x.
- the content z per unit area of the nonaqueous electrolyte contained in the third active material layer and the content y per unit area of the nonaqueous electrolyte contained in the second active material layer satisfy y ⁇ z. Is preferable and 1.1 ⁇ z / y ⁇ 6 is preferably satisfied. Thereby, it becomes easier to control the distribution of the nonaqueous electrolyte in the entire electrode group.
- n ⁇ 15 it is preferable to satisfy n ⁇ 10.
- the thickness of the thin battery is, for example, 1 mm or less, the relationship of x, y, and z can be established regardless of the number n of the second electrodes.
- n ⁇ 10 the effect of establishing the relationship of x, y, and z is increased.
- the porosity A of the first active material layer is preferably 20 to 80%, and more preferably 25 to 60%. However, when the first active material layer is a positive electrode, the porosity A is preferably 20 to 30%, and more preferably 23 to 27%. Further, when the first active material layer is a negative electrode, the porosity A is preferably 25 to 60%, and more preferably 40 to 60%.
- the porosity B of the second active material layer is preferably smaller than the porosity A, and the ratio of the porosity A and the porosity B: A / B is, for example, 1.03 to 4.5. Is preferred.
- the porosity C of the third active material layer is preferably not more than the porosity A, and the ratio A / C of the porosity A to the porosity C may be 1 to 4, for example.
- the nonaqueous electrolyte contained in the first active material layer is in a gel form.
- the non-aqueous electrolyte contained in the first active material layer can be gelled by including in the first active material layer a matrix polymer that holds and swells the non-aqueous electrolyte.
- the nonaqueous electrolyte includes, for example, a mixture of a lithium salt and a nonaqueous solvent.
- the matrix polymer include a fluororesin containing a vinylidene fluoride unit, an acrylic resin containing a (meth) acrylic acid and / or (meth) acrylic ester unit, and a polyether resin containing a polyalkylene oxide unit. .
- Examples of the fluororesin containing a vinylidene fluoride unit include polyvinylidene fluoride (PVdF), a copolymer (PVdF-HFP) containing a vinylidene fluoride (VdF) unit and a hexafluoropropylene (HFP) unit, and vinylidene fluoride (VdF). ) Units and trifluoroethylene (TFE) units.
- the amount of the vinylidene fluoride unit contained in the fluororesin containing the vinylidene fluoride unit is preferably 1 mol% or more so that the fluororesin can easily swell with the nonaqueous electrolyte.
- the ratio between the area S1 of the first active material layer and the area S2 of the second active material layer: S1 / S2 is 0.7 to 1. From the viewpoint of more preferably controlling the distribution of the nonaqueous electrolyte contained in the electrode group. 3 is preferred. Further, when the first electrode is a negative electrode and the second electrode is a positive electrode, S1 / S2 is not only more preferable to control the distribution of the nonaqueous electrolyte, but also from the viewpoint of preventing the deposition of metallic lithium. It is preferably larger than 1, more preferably 1.01 to 1.3.
- the area S3 of the third active material layer having the same polarity as the first active material layer is preferably approximately the same as the area S1 of the first active material layer from the viewpoint of securing a capacity balance.
- the ratio S1 / S3 of the area S1 of the first active material layer to the area S3 of the third active material layer is preferably 0.95 ⁇ S1 / S3 ⁇ 1.05.
- the active material layer areas S1, S2 and S3 are synonymous with the projected area (S) of each active material layer viewed from the normal direction (direction perpendicular to the surface direction of the current collector sheet). .
- the exterior body is formed of, for example, a laminate film including a barrier layer and resin layers respectively formed on both sides thereof.
- the inorganic material used for the barrier layer is not particularly limited, but it is preferable to use a metal layer, a ceramic layer, or the like in terms of barrier performance, strength, bending resistance, and the like.
- metal materials such as aluminum, titanium, nickel, iron, platinum, gold, and silver, and ceramic materials such as silicon oxide, magnesium oxide, and aluminum oxide are preferable.
- the thickness of the barrier layer is preferably 0.01 to 0.5 ⁇ m, for example.
- the resin layer material disposed on the inner surface side of the exterior body is made of polyolefins such as polyethylene (PE) and polypropylene (PP), polyethylene terephthalate, and polyamide from the viewpoints of ease of heat welding, electrolyte resistance and chemical resistance. Polyurethane, polyethylene-vinyl acetate copolymer (EVA) and the like are preferable.
- the thickness of the resin layer on the inner surface side is preferably 10 to 100 ⁇ m.
- the resin layer disposed on the outer surface side of the exterior body is made of polyamide (PA) such as 6,6-nylon, polyolefin, polyethylene terephthalate (PET), polybutylene terephthalate. Polyesters such as are preferred.
- the thickness of the resin layer on the outer surface side is preferably 5 to 100 ⁇ m.
- the second electrode is a negative electrode.
- the third electrode is a positive electrode. If the first electrode is a negative electrode, the second electrode is a positive electrode. At this time, the third electrode is a negative electrode.
- the configuration of the positive electrode and the negative electrode will be described in more detail.
- the negative electrode has a negative electrode current collector sheet as the first or second current collector sheet and a negative electrode active material layer as the first or second active material layer.
- a negative electrode active material layer is provided on one surface of the negative electrode current collector sheet.
- a negative electrode active material layer is provided on both surfaces of the negative electrode current collector sheet.
- a metal film, a metal foil, or the like is used for the negative electrode current collector sheet.
- the negative electrode current collector sheet preferably does not form an alloy with the negative electrode active material and is excellent in electronic conductivity. Therefore, the material of the negative electrode current collector sheet is preferably at least one selected from the group consisting of copper, nickel, titanium, alloys thereof, and stainless steel.
- the thickness of the negative electrode current collector sheet is preferably 5 to 30 ⁇ m, for example.
- the negative electrode active material layer includes a negative electrode active material and a binder, and includes a conductive agent as necessary.
- the negative electrode active material layer may be a porous deposited film formed by a vapor phase method (for example, vapor deposition).
- Examples of the negative electrode active material include carbon materials (for example, graphite), silicon alloys, silicon oxides, and the like.
- the thickness of the negative electrode active material layer is preferably, for example, 1 to 300 ⁇ m. By setting the thickness of the negative electrode active material layer to 1 ⁇ m or more, a sufficient capacity can be maintained. On the other hand, when the thickness of the negative electrode active material layer is 300 ⁇ m or less, the negative electrode can maintain high flexibility, and stress is hardly generated in the thin battery during bending.
- the binder of a negative electrode active material layer contains the fluororesin containing a vinylidene fluoride unit.
- the negative electrode of a lithium ion secondary battery mainly contains a carbon material as an active material.
- a carbon material is used as the active material, rubber particles (for example, styrene-butadiene rubber) are used as the binder from the viewpoint that the binding strength can be realized with a small amount.
- the content of the nonaqueous electrolyte in the negative electrode may be reduced during discharge, and it may be difficult to maintain the relationship y ⁇ x.
- a fluororesin containing a vinylidene fluoride unit as a binder, the non-aqueous electrolyte is easily held in the first active material layer (negative electrode active material layer), and y ⁇ x is easily satisfied. .
- the nonaqueous electrolyte contained in the first active material layer can be easily gelled.
- the positive electrode has a positive electrode current collector sheet as a first or second current collector sheet and a positive electrode active material layer as a first or second active material layer.
- a positive electrode active material layer is provided on one surface of the positive electrode current collector sheet.
- a positive electrode active material layer is provided on both surfaces of the positive electrode current collector sheet.
- a metal film, a metal foil or the like is used for the positive electrode current collector sheet.
- the material of the positive electrode current collector sheet is preferably at least one selected from the group consisting of, for example, silver, nickel, palladium, gold, platinum, aluminum, alloys thereof, and stainless steel.
- the thickness of the positive electrode current collector sheet is preferably 1 to 30 ⁇ m, for example.
- the positive electrode active material layer includes a positive electrode active material and a binder, and includes a conductive agent as necessary.
- the positive electrode active material is not particularly limited, but when the thin battery is a secondary battery, a lithium-containing composite oxide, for example, Li xa CoO 2 , Li xa NiO 2 , Li xa MnO 2 , Li xa Co y Ni 1-y O 2 , Li xa Co y M 1-y O z , Li xa Ni 1- y My O z , Li xb Mn 2 O 4 , Li xb Mn 2- y My O 4 are suitable. .
- xa and xb are values before the start of charge / discharge, and increase / decrease by charge / discharge.
- at least one selected from the group consisting of manganese dioxide, carbon fluoride (fluorinated graphite), lithium-containing composite oxide, metal sulfide, and organic sulfur compound can be used.
- the thickness of the positive electrode active material layer is preferably 1 to 300 ⁇ m, for example. A sufficient capacity can be maintained by setting the thickness of the positive electrode active material layer to 1 ⁇ m or more. On the other hand, when the thickness of the positive electrode active material layer is 300 ⁇ m or less, the positive electrode can maintain high flexibility, and stress is less likely to occur in the thin battery during bending.
- the binder of the first active material layer preferably contains a fluororesin containing a vinylidene fluoride unit.
- the non-aqueous electrolyte is easily held in the first active material layer, and it is easy to satisfy y ⁇ x.
- the nonaqueous electrolyte contained in the first active material layer can be easily gelled.
- Conductive agents included in the active material layer of the positive electrode or negative electrode include graphites such as natural graphite and artificial graphite; carbon blacks such as acetylene black, ketjen black, channel black, furnace black, lamp black, and thermal black. Used.
- the amount of the conductive agent is, for example, 0 to 20 parts by mass per 100 parts by mass of the active material.
- the binder contained in the active material layer of the positive electrode or the negative electrode includes a fluorine resin containing a vinylidene fluoride unit such as polyvinylidene fluoride (PVDF), and a fluorine resin not containing a vinylidene fluoride unit such as polytetrafluoroethylene.
- PVDF polyvinylidene fluoride
- Acrylic resins such as polyacrylonitrile and polyacrylic acid, and rubbers such as styrene butadiene rubber may also be used.
- the amount of the binder is, for example, 0.5 to 15 parts by mass per 100 parts by mass of the active material.
- a fluororesin containing a vinylidene fluoride unit may be used in combination with another binder. In that case, it is preferable to contain 10% by mass or more of a fluororesin containing a vinylidene fluoride unit in the entire binder from the viewpoint of enhancing the retention capacity of the non-aqueous electrolyte in the first active material layer.
- Non-aqueous electrolyte a mixture of a lithium salt and a non-aqueous solvent in which the lithium salt is dissolved is preferable.
- the lithium salt include LiClO 4 , LiBF 4 , LiPF 6 , LiCF 3 SO 3 , LiCF 3 CO 2 , and imide salts.
- Non-aqueous solvents include, for example, cyclic carbonates such as propylene carbonate, ethylene carbonate, and butylene carbonate; chain carbonates such as diethyl carbonate, ethyl methyl carbonate, and dimethyl carbonate; Acid ester; and the like.
- a resin microporous film or a nonwoven fabric is preferably used.
- a material (resin) for the separator for example, polyolefin such as polyethylene and polypropylene, and polyamide such as polyamide and polyamideimide are preferable.
- the thickness of the separator is, for example, 8 to 30 ⁇ m.
- the negative electrode lead and the positive electrode lead are connected to the negative electrode current collector sheet or the positive electrode current collector sheet, for example, by welding.
- the negative electrode lead for example, a copper lead, a copper alloy lead, a nickel lead or the like is preferably used.
- the positive electrode lead for example, a nickel lead or an aluminum lead is preferably used.
- An electrolytic copper foil having a thickness of 8 ⁇ m was prepared as a negative electrode current collector sheet.
- a negative electrode mixture slurry was applied to one surface of the electrolytic copper foil, dried and rolled to form a negative electrode active material layer, thereby obtaining a negative electrode sheet.
- the linear pressure was controlled so that the porosity of the negative electrode active material layer became the value shown in Table 1.
- a negative electrode having a size of 23 mm ⁇ 45 mm having a tab of 5 mm ⁇ 5 mm was cut out from the obtained negative electrode sheet, and a copper negative electrode lead was ultrasonically welded to the tab.
- the negative electrode mixture slurry is composed of 100 parts by mass of graphite (average particle size: 22 ⁇ m) as a negative electrode active material and vinylidene fluoride-hexafluoropropylene copolymer (PVdF-HFP, vinylidene fluoride unit) as a binder. 5 mol%) 8 parts by mass and an appropriate amount of N-methyl-2-pyrrolidone (NMP) were mixed to prepare.
- NMP N-methyl-2-pyrrolidone
- the positive electrode mixture slurry includes 100 parts by mass of LiCoO 2 (average particle size 20 ⁇ m) as a positive electrode active material, 2 parts by mass of acetylene black as a conductive agent, and 2 parts by mass of polyvinylidene fluoride (PVdF) as a binder. It was prepared by mixing with an appropriate amount of NMP.
- LiCoO 2 average particle size 20 ⁇ m
- acetylene black as a conductive agent
- PVdF polyvinylidene fluoride
- Capacity ratio of negative electrode capacity Cn and positive electrode capacity Cp The thickness of each active material layer was controlled so that Cn / Cp was 1.05. The Cn / Cp ratio is the same for each of Examples and Comparative Examples described later. Ratio of area Sn of the negative electrode active material layer to area Sp of the positive electrode active material layer: Sn / Sp was 1.1.
- a positive electrode was disposed between a pair of negative electrodes so that the negative electrode active material layer and the positive electrode active material layer face each other, to obtain an electrode group.
- a separator made of a microporous polyethylene film (thickness 9 ⁇ m) having a size of 23 mm ⁇ 49 mm was disposed between the negative electrode and the positive electrode.
- the electrode group was housed in an exterior body made of a cylindrical laminate film having an aluminum barrier layer.
- a laminate film having a three-layer structure of polypropylene (PP) layer / aluminum deposited film (thickness 0.05 ⁇ m) / polyamide (PA) layer and a total thickness of about 50 ⁇ m was used.
- the PP layer was placed on the inside and the PA layer on the outside.
- the positive electrode lead and the negative electrode lead were led out from one opening of the outer package, and the opening was sealed by thermal welding with each lead interposed therebetween.
- the electrode group was sufficiently deaerated under a reduced pressure environment to sufficiently impregnate the electrode group with the nonaqueous electrolyte.
- PVdF-HFP which is the binder for the negative electrode, was swollen by the nonaqueous electrolyte and turned into a gel state.
- the electrode group was pressurized from the outside of the exterior body at a pressure of 0.2 MPa, and excess nonaqueous electrolyte was removed from the interior of the exterior body.
- the non-aqueous electrolyte is a mixed solvent of ethylene carbonate (EC), propylene carbonate (PC), diethyl carbonate (DEC), and dimethyl carbonate (DMC) (volume ratio 30: 5: 30: 35) with 1 mol / liter LiPF 6.
- EC ethylene carbonate
- PC propylene carbonate
- DEC diethyl carbonate
- DMC dimethyl carbonate
- the masses Wn1 and Wp1 before being brought into contact with the nonaqueous electrolyte of the negative electrode and the positive electrode prepared in the same manner as described above were measured, respectively.
- the negative electrode and the positive electrode were impregnated with a sufficiently abundant amount of nonaqueous electrolyte for 0.5 hour.
- each electrode was pressurized at 0.2 MPa with a pair of pressure devices having a flat pressure surface larger than the area of each active material layer to remove excess nonaqueous electrolyte.
- the masses Wn2 and Wp2 of the negative electrode and the positive electrode from which the excess nonaqueous electrolyte was removed were measured, respectively.
- the pore volume distribution of each active material layer was measured with a mercury porosimeter. As the porosimeter, “Autopore III 9410” manufactured by Shimadzu Corporation was used. From the pore volume distribution, the distribution of pores having a pore diameter of 15 ⁇ m or less was extracted (excluding the distribution of pores having a pore diameter exceeding 15 ⁇ m), and the integrated pore volume (Vp) was determined. Note that pores having a pore diameter exceeding 15 ⁇ m were not included in the cumulative pore volume because they originated from irregularities on the surface of the active material layer. The obtained integrated pore volume Vp was divided by the apparent volume (Va) of the active material layer, and the porosity was determined from the following formula. The results are shown in Table 1.
- the thickness (T) of the active material layer was measured with a contact-type thickness measuring device.
- Porosity (%) (Vp / Va) ⁇ 100
- FIG. 6 Capacity maintenance rate after bending test
- a pair of extendable fixing members 600 a and 600 b were horizontally arranged opposite to each other, and the portions closed by heat welding at both ends of the thin battery in a charged state were fixed by each fixing member.
- a jig 610 having a curved surface portion with a curvature radius R of 20 mm was pressed against the thin battery 620, and the thin battery 620 was bent along the curved surface portion.
- the jig 610 was detached from the thin battery 620, and the shape of the thin battery 620 was restored. This operation was repeated 10,000 times.
- Example 5 Comparative Example 2 >> A thin battery having a structure of ⁇ positive electrode / negative electrode / positive electrode> was prepared by the following procedure.
- (1) Production of negative electrode A negative electrode sheet was produced in the same manner as in Example 1, except that the negative electrode active material layers were formed on both surfaces of the negative electrode current collector sheet. During rolling, the linear pressure was controlled so that the porosity of the negative electrode active material layer was a value shown in Table 2.
- a negative electrode having a size of 23 mm ⁇ 45 mm having a tab of 5 mm ⁇ 5 mm was cut out from the obtained negative electrode sheet, and a negative electrode lead was welded to the tab to obtain a negative electrode.
- Example 2 Production of positive electrode A positive electrode sheet was produced in the same manner as in Example 1 except that the positive electrode active material layer was formed only on one surface of the positive electrode current collector sheet. However, in Example 5, the binder was changed to PVdF-HFP. During rolling, the linear pressure was controlled so that the porosity of the positive electrode active material layer became the value shown in Table 2. A positive electrode having a size of 21 mm ⁇ 43 mm having a tab of 5 mm ⁇ 5 mm was cut out from the obtained positive electrode sheet, and a positive electrode lead was welded to the tab to obtain a positive electrode.
- Ratio of negative electrode active material layer area Sn to positive electrode active material layer area Sp Sn / Sp was 1.1.
- a thin battery having a structure of ⁇ negative electrode / positive electrode> was prepared by the following procedure.
- (1) Production of Negative Electrode As in Example 2, a negative electrode having a negative electrode active material layer on one surface of a negative electrode current collector sheet was produced.
- Ratio of negative electrode active material layer area Sn to positive electrode active material layer area Sp Sn / Sp was 1.1.
- a thin battery having a structure of ⁇ negative electrode / positive electrode / negative electrode / positive electrode> was prepared by the following procedure.
- Ratio of negative electrode active material layer area Sn to positive electrode active material layer area Sp Sn / Sp was 1.1.
- Table 3 shows the content x per unit area of the nonaqueous electrolyte contained in the negative electrode active material layer, the content y per unit area of the nonaqueous electrolyte contained in the positive electrode active material layer, and the porosity of each active material layer. . Further, Table 3 shows the results of the capacity retention ratio obtained in the same manner as described above.
- Example 6 A thin battery having the same structure as that of Example 2 was produced by the following procedure. (1) Production of negative electrode A negative electrode was produced in the same manner as in Example 2 except that PVdF was used as the binder.
- Example 7 A thin battery having the same structure as that of Example 2 was produced by the following procedure. (1) Production of negative electrode 100 parts by mass of graphite (average particle size 20 ⁇ m) as a negative electrode active material, 1.5 parts by mass of styrene-butadiene rubber (SBR) as a binder, and 1.5 parts of carboxymethyl cellulose (CMC) A negative electrode mixture slurry was prepared by mixing mass parts and an appropriate amount of water. A negative electrode was produced in the same manner as in Example 2 except that this negative electrode mixture slurry was used.
- SBR styrene-butadiene rubber
- CMC carboxymethyl cellulose
- Table 4 shows the content x per unit area of the nonaqueous electrolyte contained in the negative electrode active material layer, the content y per unit area of the nonaqueous electrolyte contained in the positive electrode active material layer, and the porosity of each active material layer. . Furthermore, Table 4 shows the results of the capacity retention rate obtained in the same manner as described above.
- Example 8 A thin battery having a structure of ⁇ negative electrode / positive electrode / negative electrode / positive electrode / negative electrode> was prepared by the following procedure. (1) Production of negative electrode Similarly to Example 2, a negative electrode (outer negative electrode) having a negative electrode active material layer on one surface of a negative electrode current collector sheet was produced. Moreover, the negative electrode (inner side negative electrode) which has a negative electrode active material layer on both surfaces of the negative electrode collector sheet similarly to the comparative example 4 was produced.
- Example 2 Production of Positive Electrode As in Example 2, a positive electrode having a positive electrode active material layer on both surfaces of the positive electrode current collector sheet was produced.
- Example 3 Assembly of thin battery Same as Example 1, except that the pair of outer negative electrodes are arranged on the outermost side and other electrodes are arranged so that the negative electrode active material layers and the positive electrode active material layers are alternately arranged. Then, an electrode group was produced, and a battery A8 of Example 8 was produced.
- Example 9 An electrode group having a structure of ⁇ negative electrode / positive electrode / negative electrode / positive electrode / negative electrode> was prepared in the same manner as in Example 8, except that the porosity of the negative electrode active material layer of the inner negative electrode was controlled to 22%. A battery A9 was prepared.
- Example 10 Two inner negative electrodes and three positive electrodes similar to those in Example 9 were prepared, and a battery A10 of Example 10 having a structure of ⁇ negative electrode / positive electrode / negative electrode / positive electrode / negative electrode / positive electrode / negative electrode> was produced.
- Table 5 shows the content x per unit area of the nonaqueous electrolyte contained in the negative electrode active material layer, the content y per unit area of the nonaqueous electrolyte contained in the positive electrode active material layer, and the porosity of each active material layer. . Further, Table 5 shows the results of the capacity retention ratio obtained in the same manner as described above.
- the thin battery of the present invention is suitable for use in a small electronic device such as a biological sticking device or a wearable portable terminal.
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Dispersion Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
- Primary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
シート状の電極群と、前記電極群に含浸された非水電解質と、前記電極群および前記非水電解質を密閉収納する外装体と、を含み、
前記電極群は、前記電極群の最外に配置されている一対の第1電極と、前記一対の第1電極の間に配置されている第2電極と、前記第1電極と前記第2電極との間に配置されているセパレータと、を具備し、
前記第1電極は、第1集電体シートおよび前記第1集電体シートの一方の表面に付着した第1活物質層を含み、
前記第2電極は、前記第1電極とは異なる極性を有し、かつ第2集電体シートおよび前記第2集電体シートの両方の表面に付着した第2活物質層を含み、
前記第1活物質層に含まれる前記非水電解質の単位面積あたりの含有量xが、前記第2活物質層に含まれる前記非水電解質の単位面積あたりの含有量yよりも大きい、薄型電池に関する。
図3は薄型電池の一例の平面図であり、図4は、薄型電池が具備する最もシンプルな構造の電極群の一例を概念的に示す縦断面図である。なお、図4は、図3に示す薄型電池のIV-IV線断面図に相当する。
図5は、薄型電池が具備する2番目にシンプルな構造の電極群の一例を概念的に示す縦断面図である。
負極は、第1または第2集電体シートとしての負極集電体シートと、第1または第2活物質層としての負極活物質層とを有する。第1電極が負極である場合、負極集電体シートの一方の表面に負極活物質層が設けられる。第2電極または第3電極が負極である場合、負極集電体シートの両方の表面に負極活物質層が設けられる。
正極は、第1または第2集電体シートとしての正極集電体シートと、第1または第2活物質層としての正極活物質層とを有する。第1電極が正極である場合、正極集電体シートの一方の表面に正極活物質層が設けられる。第2電極または第3電極が正極である場合、正極集電体シートの両方の表面に正極活物質層が設けられる。
以下の手順で、<負極/正極/負極>の構造を有する薄型電池を作製した。
負極集電体シートとして、厚さ8μmの電解銅箔を準備した。その電解銅箔の一方の表面に、負極合剤スラリーを塗布し、乾燥後、圧延して、負極活物質層を形成し、負極シートを得た。圧延の際は、負極活物質層の空隙率が表1に示す値になるように線圧を制御した。得られた負極シートから5mm×5mmのタブを有する23mm×45mmサイズの負極を切り出し、タブに銅製の負極リードを超音波溶接した。負極合剤スラリーは、負極活物質である黒鉛(平均粒径22μm)100質量部と、結着剤であるフッ化ビニリデン-ヘキサフルオロプロピレン共重合体(PVdF-HFP、フッ化ビニリデン単位の含有量5モル%)8質量部と、適量のN-メチル-2-ピロリドン(NMP)とを混合して調製した。
正極集電体シートとして、厚さ15μmのアルミニウム箔を準備した。そのアルミニウム箔の両方の表面に、正極合剤スラリーを塗布し、乾燥後、圧延して、正極活物質層を形成し、正極シートを得た。圧延の際は、正極活物質層の空隙率が表1に示す値になるように線圧を制御した。得られた正極シートから5mm×5mmのタブを有する21mm×43mmサイズの正極を切り出し、タブにアルミニウム製の正極リードを超音波溶接した。正極合剤スラリーは、正極活物質であるLiCoO2(平均粒径20μm)100質量部と、導電剤であるアセチレンブラック2質量部と、結着剤であるポリフッ化ビニリデン(PVdF)2質量部と、適量のNMPとを混合して調製した。
負極活物質層と正極活物質層とが互いに向かい合うように一対の負極の間に正極を配置し、電極群を得た。負極と正極との間には、23mm×49mmサイズの微多孔性ポリエチレンフィルム(厚さ9μm)からなるセパレータを配置した。
このようにして厚さ約0.7mmの実施例1の電池A1、実施例2の電池A2、実施例3の電池A3、実施例4の電池A4および比較例1の電池B1を作製した。
(活物質層に含まれる非水電解質の含有量)
第1活物質層である負極活物質層に含まれる非水電解質の単位面積あたりの含有量xと、第2活物質層である正極活物質層に含まれる非水電解質の単位面積あたりの含有量yとを、以下の方法で定量した。
Wn1とWn2との差(Wn1-Wn2)を負極活物質層の面積で除して、含有量x(g/cm2)を求めた。同様に、差(Wp1-Wp2)を正極活物質層の面積(両面の合計)で除して、含有量y(g/cm2)を求めた。結果を表1に示す。
各活物質層の細孔容積分布を、水銀ポロシメータにより測定した。ポロシメータには、(株)島津製作所製の「オートポアIII9410」を使用した。細孔容積分布から、細孔径15μm以下の細孔の分布を抽出し(細孔径15μmを超える細孔の分布を除外し)、その積算細孔容積(Vp)を求めた。なお、細孔径15μmを超える細孔は、活物質層の表面の凹凸などに由来するため、積算細孔容積には含めなかった。得られた積算細孔容積Vpを活物質層の見かけ体積(Va)で除し、以下の式より空隙率を求めた。結果を表1に示す。Vaは、活物質層の投影面積(S)と活物質層の厚み(T)から算出した(Va=ST)。活物質層の厚み(T)は接触式の厚み測定装置で測定した。
空隙率(%)=(Vp/Va)×100
25℃の環境下にて、薄型電池に対して以下の充放電を行い、初期容量(C0)を求めた。結果を表1に示す。ただし、薄型電池の設計容量を1C(mAh)とする。
(1)定電流充電:0.7CmA(終止電圧4.2V)
(2)定電圧充電:4.2V(終止電流0.05CmA)
(3)定電流放電:0.2CmA(終止電圧3V)
図6に示すように、伸縮可能な一対の固定部材600a、600bを水平に対向配置し、各固定部材で、充電状態の薄型電池の両端の熱溶着で閉じられた部分を固定した。そして、25℃の環境下にて、曲率半径Rが20mmの曲面部を有する治具610を薄型電池620に押し当て、曲面部に沿って薄型電池620を屈曲させた。30秒後、治具610を薄型電池620から引き離し、薄型電池620の形状を元に戻した。この操作を10000回繰り返した。その後、薄型電池に対して、上記と同じ条件で充放電を行い、屈曲試験後の放電容量(Cx)を求めた。得られた放電容量Cxと初期容量C0から、以下の式より容量維持率を求めた。結果を表1に示す。
屈曲試験後の容量維持率(%)=(Cx/C0)×100
以下の手順で、<正極/負極/正極>の構造を有する薄型電池を作製した。
(1)負極の作製
負極集電体シートの両方の表面に負極活物質層を形成したこと以外、実施例1と同様に、負極シートを作製した。圧延の際は、負極活物質層の空隙率が表2に示す値になるように線圧を制御した。得られた負極シートから5mm×5mmのタブを有する23mm×45mmサイズの負極を切り出し、タブに負極リードを溶接して負極を得た。
正極集電体シートの一方の表面だけに正極活物質層を形成したこと以外、実施例1と同様にして、正極シートを作製した。ただし、実施例5では、結着剤をPVdF-HFPに変更した。圧延の際は、正極活物質層の空隙率が表2に示す値になるように線圧を制御した。得られた正極シートから5mm×5mmのタブを有する21mm×43mmサイズの正極を切り出し、タブに正極リードを溶接して正極を得た。
負極活物質層と正極活物質層とが互いに向かい合うように一対の正極の間に負極を配置したこと以外、実施例1と同様に、電極群を作製し、薄型電池を完成させた。
このようにして厚さ約0.6mmの実施例5の電池A5および比較例2の電池B2を作製した。
第1活物質層である正極活物質層に含まれる非水電解質の単位面積あたりの含有量xと、第2活物質層である負極活物質層に含まれる非水電解質の単位面積あたりの含有量yとを測定した。また、各活物質層の空隙率を求めた。更に、上記と同様に求めた容量維持率の結果を表2に示す。
以下の手順で、<負極/正極>の構造を有する薄型電池を作製した。
(1)負極の作製
実施例2と同様に、負極集電体シートの一方の表面に負極活物質層を有する負極を作製した。
比較例2と同様に、正極集電体シートの一方の表面に正極活物質層を有する正極を作製した。
負極活物質層と正極活物質層とが互いに向かい合うように正極と負極とを対向配置したこと以外、実施例1と同様に、電極群を作製し、薄型電池を完成させた。
以下の手順で、<負極/正極/負極/正極>の構造を有する薄型電池を作製した。
(1)負極の作製
実施例2と同様に、負極集電体シートの一方の表面に負極活物質層を有する負極(外側負極)を作製した。また、比較例2と同様に(ただし、空隙率は実施例2と同様に)、負極集電体シートの両方の表面に負極活物質層を有する負極(内側負極)を作製した。
比較例2と同様に、正極集電体シートの一方の表面に正極活物質層を有する正極(外側正極)を作製した。実施例2と同様に、正極集電体シートの両方の表面に正極活物質層を有する正極(内側正極)を作製した。
外側負極と外側正極とを最外に配置し、負極活物質層と正極活物質層とが交互に配置されるように正極と負極とを配置したこと以外、実施例1と同様に、電極群を作製し、薄型電池を完成させた。
負極活物質層に含まれる非水電解質の単位面積あたりの含有量x、正極活物質層に含まれる非水電解質の単位面積あたりの含有量y、各活物質層の空隙率を表3に示す。更に、上記と同様に求めた容量維持率の結果を表3に示す。
以下の手順で、実施例2と同様の構造を有する薄型電池を作製した。
(1)負極の作製
結着剤としてPVdFを用いたこと以外、実施例2と同様に、負極を作製した。
実施例2と同様に、正極を作製した。
実施例1と同様に、電極群を作製し、薄型電池を完成させた。このようにして実施例6の電池A6を作製した。
以下の手順で、実施例2と同様の構造を有する薄型電池を作製した。
(1)負極の作製
負極活物質である黒鉛(平均粒径20μm)100質量部と、結着剤であるスチレン-ブタジエンゴム(SBR)1.5質量部と、カルボキシメチルセルロース(CMC)1.5質量部と、適量の水とを混合して負極合剤スラリーを調製した。この負極合剤スラリーを用いたこと以外、実施例2と同様に負極を作製した。
実施例2と同様に、正極を作製した。
実施例1と同様に、電極群を作製し、薄型電池を完成させた。このようにして実施例7の電池A7を作製した。
負極活物質層に含まれる非水電解質の単位面積あたりの含有量x、正極活物質層に含まれる非水電解質の単位面積あたりの含有量y、各活物質層の空隙率を表4に示す。更に、上記と同様に求めた容量維持率の結果を表4に示す。
以下の手順で、<負極/正極/負極/正極/負極>の構造を有する薄型電池を作製した。
(1)負極の作製
実施例2と同様に、負極集電体シートの一方の表面に負極活物質層を有する負極(外側負極)を作製した。また、比較例4と同様に、負極集電体シートの両方の表面に負極活物質層を有する負極(内側負極)を作製した。
実施例2と同様に、正極集電体シートの両方の表面に正極活物質層を有する正極を作製した。
一対の外側負極を最外に配置し、負極活物質層と正極活物質層とが交互に配置されるように他の電極を配置したこと以外、実施例1と同様に、電極群を作製し、実施例8の電池A8を作製した。
内側負極の負極活物質層の空隙率を22%に制御したこと以外、実施例8と同様に、<負極/正極/負極/正極/負極>の構造を有する電極群を作製し、実施例9の電池A9を作製した。
実施例9と同様の内側負極を2個、正極を3個準備し、<負極/正極/負極/正極/負極/正極/負極>の構造を有する実施例10の電池A10を作製した。
負極活物質層に含まれる非水電解質の単位面積あたりの含有量x、正極活物質層に含まれる非水電解質の単位面積あたりの含有量y、各活物質層の空隙率を表5に示す。更に、上記と同様に求めた容量維持率の結果を表5に示す。
40 生体情報測定装置
41 保持部材
42 電池搭載デバイス
43 温度センサ
45 感圧素子
46 記憶部
47 情報送信部
SW1 ボタンスイッチ
48 制御部
49 粘着剤
103,203 電極群
107,207 セパレータ
108,208 外装体
110,210 第1電極
111,211 第1集電体シート
112,212 第1活物質層
113,213 第1リード
120,220 第2電極
121,221 第2集電体シート
122,212 第2活物質層
123,223 第2リード
600a,600b 固定部材
610 治具
Claims (10)
- シート状の電極群と、前記電極群に含浸された非水電解質と、前記電極群および前記非水電解質を密閉収納する外装体と、を含み、
前記電極群は、前記電極群の最外に配置されている一対の第1電極と、前記一対の第1電極の間に配置されている第2電極と、前記第1電極と前記第2電極との間に配置されているセパレータと、を具備し、
前記第1電極は、第1集電体シートおよび前記第1集電体シートの一方の表面に付着した第1活物質層を含み、
前記第2電極は、前記第1電極とは異なる極性を有し、かつ第2集電体シートおよび前記第2集電体シートの両方の表面に付着した第2活物質層を含み、
前記第1活物質層に含まれる前記非水電解質の単位面積あたりの含有量xが、前記第2活物質層に含まれる前記非水電解質の単位面積あたりの含有量yよりも大きい、薄型電池。 - 前記第1活物質層に含まれる前記非水電解質の単位面積あたりの含有量xと、前記第2活物質層に含まれる前記非水電解質の単位面積あたりの含有量yとが、1.1≦x/y≦8を満たす、請求項1に記載の薄型電池。
- 前記第2電極を2以上含み、
さらに、一対の前記第2電極の間に配置されている第3電極を1以上含み、
前記第3電極は、前記第1電極と同じ極性を有し、かつ第3集電体シートおよび前記第3集電体シートの両方の表面に付着した第3活物質層を含み、
前記第1活物質層に含まれる前記非水電解質の単位面積あたりの含有量xは、前記第3活物質層に含まれる前記非水電解質の単位面積あたり含有量zよりも大きいか、含有量zと同じである、請求項1または2に記載の薄型電池。 - 前記第3活物質層に含まれる前記非水電解質の単位面積あたりの含有量zは、前記第2活物質層に含まれる前記非水電解質の単位面積あたり含有量yよりも大きい、請求項3に記載の薄型電池。
- 前記第2電極をn個(nは3以上の整数)含み、
前記第3電極をn-1個含む、請求項3または4に記載の薄型電池。 - 前記第1活物質層の空隙率Aが20~80%であり、
前記第2活物質層の空隙率Bが、前記空隙率Aより小さい、請求項1~5のいずれか1項に記載の薄型電池。 - 前記第1活物質層が、負極活物質と、結着剤と、を含み、
前記結着剤が、フッ化ビニリデン単位を含むフッ素樹脂である、請求項1~6のいずれか1項に記載の薄型電池。 - 前記第1活物質層に含まれる前記非水電解質の少なくとも一部がゲル状である、請求項1~7のいずれか1項に記載の薄型電池。
- 前記第1活物質層の面積が、前記第2活物質層の面積より大きい、請求項7または8に記載の薄型電池。
- 請求項1~9のいずれか1項に記載の薄型電池と、前記薄型電池からの電力供給により駆動される可撓性を有する電子機器を具備し、
前記薄型電池と前記電子機器とが、一体となってシート化されている、電池搭載デバイス。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016506107A JP6418560B2 (ja) | 2014-03-05 | 2015-02-12 | 薄型電池および電池搭載デバイス |
US15/104,862 US10147914B2 (en) | 2014-03-05 | 2015-02-12 | Thin battery and battery-mounted device |
CN201580004558.XA CN105917517A (zh) | 2014-03-05 | 2015-02-12 | 薄型电池和电池搭载设备 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014043089 | 2014-03-05 | ||
JP2014-043089 | 2014-03-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015133066A1 true WO2015133066A1 (ja) | 2015-09-11 |
Family
ID=54054887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/000625 WO2015133066A1 (ja) | 2014-03-05 | 2015-02-12 | 薄型電池および電池搭載デバイス |
Country Status (4)
Country | Link |
---|---|
US (1) | US10147914B2 (ja) |
JP (1) | JP6418560B2 (ja) |
CN (1) | CN105917517A (ja) |
WO (1) | WO2015133066A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017145011A1 (en) * | 2016-02-26 | 2017-08-31 | Semiconductor Energy Laboratory Co., Ltd. | Connecting member, power supply device, electronic device, and system |
JP2022127915A (ja) * | 2021-02-22 | 2022-09-01 | プライムプラネットエナジー&ソリューションズ株式会社 | 二次電池 |
CN115632158A (zh) * | 2022-10-27 | 2023-01-20 | 欣旺达电动汽车电池有限公司 | 二次电池及用电装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9837682B1 (en) * | 2016-08-29 | 2017-12-05 | Microsoft Technology Licensing, Llc | Variable layer thickness in curved battery cell |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01302660A (ja) * | 1988-05-30 | 1989-12-06 | Matsushita Electric Ind Co Ltd | 密閉型鉛蓄電池 |
WO2005013408A1 (ja) * | 2003-07-31 | 2005-02-10 | Nec Lamilion Energy, Ltd. | リチウムイオン二次電池 |
JP2005183073A (ja) * | 2003-12-17 | 2005-07-07 | Nissan Motor Co Ltd | バイポーラ電池 |
JP2006210089A (ja) * | 2005-01-27 | 2006-08-10 | Nissan Motor Co Ltd | 真性ポリマー電池用電極 |
JP2007109636A (ja) * | 2005-09-14 | 2007-04-26 | Nissan Motor Co Ltd | 電池用電極 |
JP2007214038A (ja) * | 2006-02-10 | 2007-08-23 | Toyota Motor Corp | 非水系二次電池、電極、非水系二次電池の製造方法、及び、電極の製造方法 |
WO2008029719A1 (fr) * | 2006-09-07 | 2008-03-13 | Panasonic Corporation | Cellule secondaire électrolytique non aqueuse |
JP2011113667A (ja) * | 2009-11-24 | 2011-06-09 | Sharp Corp | 非水電解質2次電池 |
JP2011204490A (ja) * | 2010-03-25 | 2011-10-13 | Dainippon Printing Co Ltd | 非水電解液二次電池用正極板、非水電解液二次電池用正極板の製造方法、および非水電解液二次電池 |
JP2013016515A (ja) * | 2012-10-12 | 2013-01-24 | Nissan Motor Co Ltd | 電池用電極 |
JP2013138096A (ja) * | 2011-12-28 | 2013-07-11 | Nec Tokin Corp | 蓄電デバイス |
JP2013191391A (ja) * | 2012-03-13 | 2013-09-26 | Nissan Motor Co Ltd | 二次電池 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4688604B2 (ja) | 2005-08-05 | 2011-05-25 | 日立ビークルエナジー株式会社 | リチウムイオン電池 |
JP5555380B2 (ja) * | 2011-08-29 | 2014-07-23 | パナソニック株式会社 | 薄型電池 |
JP5838322B2 (ja) | 2011-08-29 | 2016-01-06 | パナソニックIpマネジメント株式会社 | 薄型電池 |
JP5786043B2 (ja) * | 2012-02-07 | 2015-09-30 | 日産自動車株式会社 | フィルム外装電気デバイスの製造方法及び製造装置 |
-
2015
- 2015-02-12 US US15/104,862 patent/US10147914B2/en active Active
- 2015-02-12 WO PCT/JP2015/000625 patent/WO2015133066A1/ja active Application Filing
- 2015-02-12 JP JP2016506107A patent/JP6418560B2/ja active Active
- 2015-02-12 CN CN201580004558.XA patent/CN105917517A/zh active Pending
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01302660A (ja) * | 1988-05-30 | 1989-12-06 | Matsushita Electric Ind Co Ltd | 密閉型鉛蓄電池 |
WO2005013408A1 (ja) * | 2003-07-31 | 2005-02-10 | Nec Lamilion Energy, Ltd. | リチウムイオン二次電池 |
JP2005183073A (ja) * | 2003-12-17 | 2005-07-07 | Nissan Motor Co Ltd | バイポーラ電池 |
JP2006210089A (ja) * | 2005-01-27 | 2006-08-10 | Nissan Motor Co Ltd | 真性ポリマー電池用電極 |
JP2007109636A (ja) * | 2005-09-14 | 2007-04-26 | Nissan Motor Co Ltd | 電池用電極 |
JP2007214038A (ja) * | 2006-02-10 | 2007-08-23 | Toyota Motor Corp | 非水系二次電池、電極、非水系二次電池の製造方法、及び、電極の製造方法 |
WO2008029719A1 (fr) * | 2006-09-07 | 2008-03-13 | Panasonic Corporation | Cellule secondaire électrolytique non aqueuse |
JP2011113667A (ja) * | 2009-11-24 | 2011-06-09 | Sharp Corp | 非水電解質2次電池 |
JP2011204490A (ja) * | 2010-03-25 | 2011-10-13 | Dainippon Printing Co Ltd | 非水電解液二次電池用正極板、非水電解液二次電池用正極板の製造方法、および非水電解液二次電池 |
JP2013138096A (ja) * | 2011-12-28 | 2013-07-11 | Nec Tokin Corp | 蓄電デバイス |
JP2013191391A (ja) * | 2012-03-13 | 2013-09-26 | Nissan Motor Co Ltd | 二次電池 |
JP2013016515A (ja) * | 2012-10-12 | 2013-01-24 | Nissan Motor Co Ltd | 電池用電極 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017145011A1 (en) * | 2016-02-26 | 2017-08-31 | Semiconductor Energy Laboratory Co., Ltd. | Connecting member, power supply device, electronic device, and system |
US10770910B2 (en) | 2016-02-26 | 2020-09-08 | Semiconductor Energy Laboratory Co., Ltd. | Connecting member, power supply device, electronic device, and system |
JP2022000589A (ja) * | 2016-02-26 | 2022-01-04 | 株式会社半導体エネルギー研究所 | 電源装置 |
JP7068535B2 (ja) | 2016-02-26 | 2022-05-16 | 株式会社半導体エネルギー研究所 | 電源装置 |
US11714385B2 (en) | 2016-02-26 | 2023-08-01 | Semiconductor Energy Laboratory Co., Ltd. | Connecting member, power supply device, electronic device, and system |
JP2022127915A (ja) * | 2021-02-22 | 2022-09-01 | プライムプラネットエナジー&ソリューションズ株式会社 | 二次電池 |
JP7202407B2 (ja) | 2021-02-22 | 2023-01-11 | プライムプラネットエナジー&ソリューションズ株式会社 | 二次電池 |
CN115632158A (zh) * | 2022-10-27 | 2023-01-20 | 欣旺达电动汽车电池有限公司 | 二次电池及用电装置 |
CN115632158B (zh) * | 2022-10-27 | 2023-10-13 | 欣旺达动力科技股份有限公司 | 二次电池及用电装置 |
Also Published As
Publication number | Publication date |
---|---|
CN105917517A (zh) | 2016-08-31 |
JPWO2015133066A1 (ja) | 2017-04-06 |
JP6418560B2 (ja) | 2018-11-07 |
US10147914B2 (en) | 2018-12-04 |
US20170141359A1 (en) | 2017-05-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11233266B2 (en) | Electronic device with secondary battery | |
WO2015136837A1 (ja) | 薄型電池および電池搭載デバイス | |
US11923499B2 (en) | Secondary battery and a method for fabricating the same | |
US10056578B2 (en) | Electronic device with secondary battery | |
JP5490324B2 (ja) | 薄型電池用電極群、薄型電池、及び電子機器 | |
US9281538B2 (en) | Thin battery and battery device | |
US8785030B2 (en) | Flexible battery and method for producing the same | |
WO2016051645A1 (ja) | フレキシブル電池 | |
JP6418560B2 (ja) | 薄型電池および電池搭載デバイス | |
WO2016157685A1 (ja) | 薄型電池および電池搭載デバイス | |
JP2016189300A (ja) | 薄型電池 | |
JP2019204749A (ja) | 薄型電池および電子機器 | |
JP2016072015A (ja) | フレキシブル電池 | |
WO2018110080A1 (ja) | フレキシブル電池 |
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: 15758372 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2016506107 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15104862 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15758372 Country of ref document: EP Kind code of ref document: A1 |