JP5205691B2 - リチウムイオン電池 - Google Patents
リチウムイオン電池 Download PDFInfo
- Publication number
- JP5205691B2 JP5205691B2 JP2005281543A JP2005281543A JP5205691B2 JP 5205691 B2 JP5205691 B2 JP 5205691B2 JP 2005281543 A JP2005281543 A JP 2005281543A JP 2005281543 A JP2005281543 A JP 2005281543A JP 5205691 B2 JP5205691 B2 JP 5205691B2
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- Prior art keywords
- layer
- lithium ion
- ion battery
- tab
- chemical conversion
- Prior art date
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims description 85
- 229910001416 lithium ion Inorganic materials 0.000 title claims description 85
- 239000000463 material Substances 0.000 claims description 60
- 238000006243 chemical reaction Methods 0.000 claims description 57
- 239000000126 substance Substances 0.000 claims description 56
- 229920005989 resin Polymers 0.000 claims description 38
- 239000011347 resin Substances 0.000 claims description 38
- 230000004888 barrier function Effects 0.000 claims description 28
- 229920000642 polymer Polymers 0.000 claims description 20
- 239000003792 electrolyte Substances 0.000 claims description 19
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 13
- 239000007822 coupling agent Substances 0.000 claims description 11
- 229910052744 lithium Inorganic materials 0.000 claims description 11
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 9
- 230000009477 glass transition Effects 0.000 claims description 9
- 229910000040 hydrogen fluoride Inorganic materials 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 239000007774 positive electrode material Substances 0.000 claims description 7
- 239000004962 Polyamide-imide Substances 0.000 claims description 6
- 229920002312 polyamide-imide Polymers 0.000 claims description 6
- WMYWOWFOOVUPFY-UHFFFAOYSA-L dihydroxy(dioxo)chromium;phosphoric acid Chemical compound OP(O)(O)=O.O[Cr](O)(=O)=O WMYWOWFOOVUPFY-UHFFFAOYSA-L 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000007773 negative electrode material Substances 0.000 claims description 5
- 239000004697 Polyetherimide Substances 0.000 claims description 4
- 229920001601 polyetherimide Polymers 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 239000009719 polyimide resin Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002798 polar solvent Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 186
- 238000000034 method Methods 0.000 description 54
- -1 lithium metals Chemical class 0.000 description 32
- 229910052782 aluminium Inorganic materials 0.000 description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 29
- 229910052731 fluorine Inorganic materials 0.000 description 26
- 239000011737 fluorine Substances 0.000 description 25
- 239000000243 solution Substances 0.000 description 25
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 24
- 229920001577 copolymer Polymers 0.000 description 18
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 18
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 13
- 239000000178 monomer Substances 0.000 description 12
- 238000009413 insulation Methods 0.000 description 11
- 239000011888 foil Substances 0.000 description 10
- 239000002585 base Substances 0.000 description 9
- 238000001723 curing Methods 0.000 description 9
- 238000004049 embossing Methods 0.000 description 9
- 239000011734 sodium Substances 0.000 description 9
- 239000002904 solvent Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
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- 239000012790 adhesive layer Substances 0.000 description 8
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- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 6
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- 208000028659 discharge Diseases 0.000 description 6
- 239000008151 electrolyte solution Substances 0.000 description 6
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- 239000000047 product Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 5
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- 239000003921 oil Substances 0.000 description 5
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 5
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
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- 150000002989 phenols Chemical class 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
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- 229920001155 polypropylene Polymers 0.000 description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 4
- 239000002966 varnish Substances 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910021564 Chromium(III) fluoride Inorganic materials 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- 229920002292 Nylon 6 Polymers 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 3
- 239000006087 Silane Coupling Agent Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
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- 125000003118 aryl group Chemical group 0.000 description 3
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- 229910052799 carbon Inorganic materials 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
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- 238000005520 cutting process Methods 0.000 description 3
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- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 3
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- 238000000465 moulding Methods 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
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- 229920002050 silicone resin Polymers 0.000 description 3
- 239000004711 α-olefin Substances 0.000 description 3
- WWUVJRULCWHUSA-UHFFFAOYSA-N 2-methyl-1-pentene Chemical compound CCCC(C)=C WWUVJRULCWHUSA-UHFFFAOYSA-N 0.000 description 2
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- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
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- 230000002411 adverse Effects 0.000 description 1
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- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- ZZTCCAPMZLDHFM-UHFFFAOYSA-N ammonium thioglycolate Chemical compound [NH4+].[O-]C(=O)CS ZZTCCAPMZLDHFM-UHFFFAOYSA-N 0.000 description 1
- 229940075861 ammonium thioglycolate Drugs 0.000 description 1
- 239000006183 anode active material Substances 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000007611 bar coating method Methods 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
- 101150113676 chr1 gene Proteins 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 229910000151 chromium(III) phosphate Inorganic materials 0.000 description 1
- IKZBVTPSNGOVRJ-UHFFFAOYSA-K chromium(iii) phosphate Chemical compound [Cr+3].[O-]P([O-])([O-])=O IKZBVTPSNGOVRJ-UHFFFAOYSA-K 0.000 description 1
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- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- LDCRTTXIJACKKU-ONEGZZNKSA-N dimethyl fumarate Chemical compound COC(=O)\C=C\C(=O)OC LDCRTTXIJACKKU-ONEGZZNKSA-N 0.000 description 1
- 229960004419 dimethyl fumarate Drugs 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
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- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
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- UQOULBWSWCWZJC-UHFFFAOYSA-N ethene;methyl hydrogen carbonate Chemical compound C=C.COC(O)=O UQOULBWSWCWZJC-UHFFFAOYSA-N 0.000 description 1
- HJVKTYVDOZVQPA-UHFFFAOYSA-N ethenoxycyclopentane Chemical compound C=COC1CCCC1 HJVKTYVDOZVQPA-UHFFFAOYSA-N 0.000 description 1
- AZDCYKCDXXPQIK-UHFFFAOYSA-N ethenoxymethylbenzene Chemical group C=COCC1=CC=CC=C1 AZDCYKCDXXPQIK-UHFFFAOYSA-N 0.000 description 1
- ZBGRMWIREQJHPK-UHFFFAOYSA-N ethenyl 2,2,2-trifluoroacetate Chemical compound FC(F)(F)C(=O)OC=C ZBGRMWIREQJHPK-UHFFFAOYSA-N 0.000 description 1
- MEGHWIAOTJPCHQ-UHFFFAOYSA-N ethenyl butanoate Chemical compound CCCC(=O)OC=C MEGHWIAOTJPCHQ-UHFFFAOYSA-N 0.000 description 1
- GLVVKKSPKXTQRB-UHFFFAOYSA-N ethenyl dodecanoate Chemical compound CCCCCCCCCCCC(=O)OC=C GLVVKKSPKXTQRB-UHFFFAOYSA-N 0.000 description 1
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- 150000002221 fluorine Chemical class 0.000 description 1
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- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
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- 238000009830 intercalation Methods 0.000 description 1
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- 150000002500 ions Chemical class 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- 150000002641 lithium Chemical group 0.000 description 1
- 150000002642 lithium compounds Chemical class 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910021437 lithium-transition metal oxide Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 229910021645 metal ion Inorganic materials 0.000 description 1
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- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 229920003145 methacrylic acid copolymer Polymers 0.000 description 1
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical group CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- HWGNBUXHKFFFIH-UHFFFAOYSA-I pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O HWGNBUXHKFFFIH-UHFFFAOYSA-I 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
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- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
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- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
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- 229920006267 polyester film Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920000232 polyglycine polymer Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- 230000001737 promoting effect Effects 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- 229940071207 sesquicarbonate Drugs 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 238000009823 thermal lamination Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- KOZCZZVUFDCZGG-UHFFFAOYSA-N vinyl benzoate Chemical compound C=COC(=O)C1=CC=CC=C1 KOZCZZVUFDCZGG-UHFFFAOYSA-N 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
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- 230000037303 wrinkles Effects 0.000 description 1
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Images
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Description
1)延伸ポリエチレンテレフタレート/延伸ナイロン
2)延伸ナイロン/延伸ポリエチレンテレフタレート
また、包装材料の機械適性(包装機械、加工機械の中での搬送の安定性)、表面保護性(耐熱性、耐電解質性)、二次加工とてリチウムイオン電池用の外装体をエンボスタイプ(図2参照)とする際に、エンボス時の金型と最外層との摩擦抵抗を小さくする目的で、最外層を多層化、最外層表面にフッ素系樹脂層、アクリル系樹脂層、シリコーン系樹脂層等を設けることが好ましい。例えば、
3)フッ素系樹脂/延伸ポリエチレンテレフタレート(フッ素系樹脂は、フィルム状物、または液状コーティング後乾燥で形成)
4)シリコーン系樹脂/延伸ポリエチレンテレフタレート(シリコーン系樹脂は、フィルム状物、または液状コーティング後乾燥で形成)
5)フッ素系樹脂/延伸ポリエチレンテレフタレート/延伸ナイロン
6)シリコーン系樹脂/延伸ポリエチレンテレフタレート/延伸ナイロン
7)アクリル系樹脂/延伸ナイロン(アクリル系樹脂はフィルム状、または液状コーティング後乾燥で硬化)
(1)外装体は、片面エンボスタイプとし、凹部は35mm×50mm、凹部の深さは3.5mm、フランジ部(シール部)の幅は5mmとした。
(2)タブは、陽極をニッケル、陰極をアルミニウムとし、いずれも、幅8mm、長さ50mm、厚さ100μmである。
(3)実施例におけるタブの脱脂処理、陽極酸化処理および化成処理は、リチウムイオン電池本体に装着するサイズに断裁したものに対して処理した。実際の製造においては、前述のように、タブ材の金属シートをスリッターした長尺状態で処理することができる。
厚さ30μmのアルミニウム箔の片面に、アミノ化フェノール重合体、フッ化クロム(III)および、リン化合物を含有する化成処理液をロールコート法により2μmの化成処理皮膜を形成し、絶縁ワニスとして、芳香族ポリアミドイミド樹脂20重量部、シランカップリング剤3重量部、N−メチル−2−ピロリドンとキシレンからなる混合溶媒80重量部からなるものを準備し、前記化成処理皮膜面に、絶縁ワニスをバーコーターで塗布し、190℃で10秒間の条件で乾燥(焼付)し絶縁層を形成した。続いて、30μm厚さの未延伸ポリプロピレンフィルムを絶縁層面に加熱圧着し、さらにアルミニウム箔の他方面と25μm厚さの二軸延伸ナイロンフィルムとを2液硬化型ポリウレタン系接着剤を介して積層して外装体材料を得た。そして、この外装体材料をプレス加工し、エンボスタイプの外装体を得た。
<タブ>
陰極用のタブ材として厚さ30μmのアルミニウム箔、陽極用のタブ材として厚さ30μmのニッケル箔を準備し、これらのタブ材を0.1規定の硝酸液に5分間浸漬してから水洗いして乾燥した。絶縁ワニスとして、芳香族ポリアミドイミド樹脂20重量部、シランカップリング剤3重量部、N−メチル−2−ピロリドンとキシレンからなる混合溶媒80重量部からなるものを準備する。そして、タブ材の両面にレジスト膜をパターン形成した後、絶縁ワニスをバーコーターで塗布し、190℃で10秒間の条件で乾燥(焼付)し、水洗後レジスト膜を除去することにより、タブ材の両面に所定パターンの厚さ2μmの絶縁層を形成した。続いて、絶縁層を形成したタブ材の両面にコロナ放電処理を施した後、アミノ化フェノール重合体、三価クロム化合物、および、リン化合物を含有する化成処理液を用いてロールコート法により2μmの化成処理層を形成し、リチウムイオン電池タブを得た。
<電池本体>
上記のようにして得られた陽極用及び陰極用のタブ材をリチウムイオン電池のセル端部に接合して、電池本体とした。
<リチウムイオン電池>
接着性フィルムとして、酸変性LLDPE100μmによってタブを挟持した状態として、電池本体を外装体のエンボス部の中に収納して、蓋体を被覆して周縁をヒートシールしてエンボスタイプのリチウムイオン電池を得た。
厚さ30μmのアルミニウム箔の片面に、アミノ化フェノール重合体、フッ化クロム(III)及びリン化合物を含有する化成処理液をロールコート法により2μmの化成処理層を形成し、化成処理層面にフッ素系ポリオールにイソシアネート系硬化剤をポリオールの水酸基(−OH基)1当量に対して1.1当量となるように添加したフッ素系樹脂溶液を乾燥後に3.0g/m2となるように塗布・乾燥し絶縁層を形成した。続いて、30μm厚さの未延伸ポリプロピレンフィルムを絶縁層面に加熱圧着し、さらにアルミニウム箔の他方面と25μm厚さの二軸延伸ナイロンフィルムとを2液硬化型ポリウレタン系接着剤を介して積層して外装体材料を得た。そして、この外装体材料をプレス加工し、エンボスタイプの外装体を得た。
<タブ>
陰極用のタブ材として厚さ30μmのアルミニウム箔、陽極用のタブ材として厚さ30μmのニッケル箔を準備し、これらのタブ材を0.1規定の硝酸液に5分間浸漬してから水洗いして乾燥した。続いて、タブ材の両面にレジスト膜をパターン形成した後、不飽和カルボン酸でグラフト変性したポリプロピレン(以下、PPaと呼称する)を15μm厚さとなるようにTダイ押出機で加熱溶融押出しし、その後にPPa面にコロナ放電処理を施し、該コロナ放電処理した前記PPa面にフッ素系ポリオールにイソシアネート系硬化剤をポリオールの水酸基(−OH基)1当量に対して1.1当量となるように添加したフッ素系樹脂溶液を乾燥後に3.0g/m2となるように塗布・乾燥し、水洗後レジスト膜を除去することにより、タブ材の両面に所定パターンの絶縁層を形成した。そして、絶縁層を形成したタブ材の両面にコロナ放電処理を施した後、アミノ化フェノール重合体、三価クロム化合物、および、リン化合物を含有する化成処理液を用いてロールコート法により2μmの化成処理層を形成し、リチウムイオン電池タブを得た。
<電池本体>
上記のようにして得られた陽極用及び陰極用のタブ材をリチウムイオン電池のセル端部に接合して、電池本体とした。
<リチウムイオン電池>
接着性フィルムとして、酸変性LLDPE100μmによってタブを挟持した状態として、電池本体を外装体のエンボス部の中に収納して、蓋体を被覆して周縁をヒートシールしてエンボスタイプのリチウムイオン電池を得た。
2 リチウムイオン電池本体
3 セル(蓄電部)
4 タブ
4a タブ材
4b 絶縁層
4c 化成処理層(タブ)
4d 開口部
5 外装体
6 接着性フィルム
7 挟持部分
8 正極集電体
10 積層体
11 基材層
12 バリア層
13 絶縁層
14 最内層(ヒートシール層)
15 化成処理層(バリア層表面)
16 接着層
Claims (4)
- 正極活物質及び正極集電体からなる正極と、負極活物質及び負極集電体からなる負極と、前記正極及び負極間に充填される電解質とを含むリチウム電池本体と、該リチウム電池本体を収納し周縁部をヒートシールすることにより前記リチウム電池本体を密封する外装体と、前記正極及び負極に連結されるとともに前記外装体により先端が突出するように挟持され、該挟持部分をヒートシールされる金属製のリチウムイオン電池タブとからなるリチウムイオン電池であって、
前記外装体が、少なくとも基材層、バリア層、第1化成処理層、第1絶縁層及びヒートシール層が順次積層された積層体であるとともに、
第1絶縁層は、カップリング剤とガラス転移温度が少なくとも200℃以上の耐熱性ポリマーとを含んで第1化成処理層の一面に形成された皮膜であり、
前記リチウムイオン電池タブは前記外装体に挟持される部分に耐フッ化水素層から成る第2化成処理層が形成されるとともに、第2化成処理層の内側には酸化皮膜から成る第2絶縁層が形成されることを特徴とするリチウムイオン電池。 - 第1絶縁層は、前記耐熱性ポリマーと前記カップリング剤とを極性溶媒に溶解させて第1化成処理層の一面に直接塗布して乾燥させることにより形成されることを特徴とする請求項1に記載のリチウムイオン電池。
- 前記耐熱性ポリマーが、ポリイミド系樹脂、ポリアミドイミド系樹脂もしくはポリエーテルイミド樹脂又はこれら2つ以上の混合物であることを特徴とする請求項1または請求項2に記載のリチウムイオン電池。
- 第1化成処理層が、リン酸クロメート処理で形成されることを特徴とする請求項1乃至請求項3のいずれかに記載のリチウムイオン電池。
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