JP6030070B2 - 非水電解質二次電池 - Google Patents
非水電解質二次電池 Download PDFInfo
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- JP6030070B2 JP6030070B2 JP2013550322A JP2013550322A JP6030070B2 JP 6030070 B2 JP6030070 B2 JP 6030070B2 JP 2013550322 A JP2013550322 A JP 2013550322A JP 2013550322 A JP2013550322 A JP 2013550322A JP 6030070 B2 JP6030070 B2 JP 6030070B2
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- negative electrode
- battery
- amorphous carbon
- electrolyte secondary
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- 239000011255 nonaqueous electrolyte Substances 0.000 title claims description 66
- 229910003481 amorphous carbon Inorganic materials 0.000 claims description 54
- 239000007773 negative electrode material Substances 0.000 claims description 45
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 34
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 34
- 239000007770 graphite material Substances 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 29
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 claims description 24
- 239000011248 coating agent Substances 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 21
- 229910052710 silicon Inorganic materials 0.000 claims description 19
- 239000010703 silicon Substances 0.000 claims description 19
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 12
- 229910001416 lithium ion Inorganic materials 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 8
- 239000007774 positive electrode material Substances 0.000 claims description 7
- 239000003792 electrolyte Substances 0.000 claims description 6
- 239000008151 electrolyte solution Substances 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 39
- 229910002804 graphite Inorganic materials 0.000 description 33
- 239000010439 graphite Substances 0.000 description 33
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 17
- -1 polyethylene Polymers 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 11
- 239000002245 particle Substances 0.000 description 10
- 239000010410 layer Substances 0.000 description 9
- 229910052744 lithium Inorganic materials 0.000 description 9
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 7
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 7
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical group [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 7
- 230000008961 swelling Effects 0.000 description 7
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000013461 design Methods 0.000 description 6
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- 239000002904 solvent Substances 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 5
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 5
- 239000003125 aqueous solvent Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 229910052726 zirconium Inorganic materials 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
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- 150000003839 salts Chemical class 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000012300 argon atmosphere Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
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- 238000007599 discharging Methods 0.000 description 3
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- 229920001155 polypropylene Polymers 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 description 2
- FALRKNHUBBKYCC-UHFFFAOYSA-N 2-(chloromethyl)pyridine-3-carbonitrile Chemical compound ClCC1=NC=CC=C1C#N FALRKNHUBBKYCC-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 241000156302 Porcine hemagglutinating encephalomyelitis virus Species 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 229910021383 artificial graphite Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000004305 biphenyl Substances 0.000 description 2
- 235000010290 biphenyl Nutrition 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- QLVWOKQMDLQXNN-UHFFFAOYSA-N dibutyl carbonate Chemical compound CCCCOC(=O)OCCCC QLVWOKQMDLQXNN-UHFFFAOYSA-N 0.000 description 2
- 238000007606 doctor blade method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- YCUBDDIKWLELPD-UHFFFAOYSA-N ethenyl 2,2-dimethylpropanoate Chemical compound CC(C)(C)C(=O)OC=C YCUBDDIKWLELPD-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- GAEKPEKOJKCEMS-UHFFFAOYSA-N gamma-valerolactone Chemical compound CC1CCC(=O)O1 GAEKPEKOJKCEMS-UHFFFAOYSA-N 0.000 description 2
- 239000002648 laminated material Substances 0.000 description 2
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 2
- 229910003002 lithium salt Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BHIWKHZACMWKOJ-UHFFFAOYSA-N methyl isobutyrate Chemical class COC(=O)C(C)C BHIWKHZACMWKOJ-UHFFFAOYSA-N 0.000 description 2
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229940014800 succinic anhydride Drugs 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- HMXHUUDRVBXHBQ-UHFFFAOYSA-N (2-hydroxyacetyl) 2-hydroxyacetate Chemical compound OCC(=O)OC(=O)CO HMXHUUDRVBXHBQ-UHFFFAOYSA-N 0.000 description 1
- WDXYVJKNSMILOQ-UHFFFAOYSA-N 1,3,2-dioxathiolane 2-oxide Chemical compound O=S1OCCO1 WDXYVJKNSMILOQ-UHFFFAOYSA-N 0.000 description 1
- NZPSDGIEKAQVEZ-UHFFFAOYSA-N 1,3-benzodioxol-2-one Chemical compound C1=CC=CC2=C1OC(=O)O2 NZPSDGIEKAQVEZ-UHFFFAOYSA-N 0.000 description 1
- MCTWTZJPVLRJOU-UHFFFAOYSA-O 1-methylimidazole Chemical compound CN1C=C[NH+]=C1 MCTWTZJPVLRJOU-UHFFFAOYSA-O 0.000 description 1
- VUAXHMVRKOTJKP-UHFFFAOYSA-M 2,2-dimethylbutanoate Chemical class CCC(C)(C)C([O-])=O VUAXHMVRKOTJKP-UHFFFAOYSA-M 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 102100031416 Gastric triacylglycerol lipase Human genes 0.000 description 1
- 101000941284 Homo sapiens Gastric triacylglycerol lipase Proteins 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910013684 LiClO 4 Inorganic materials 0.000 description 1
- 229910013733 LiCo Inorganic materials 0.000 description 1
- 229910012217 LiCo0.979Zr0.001Mg0.01Al0.01O2 Inorganic materials 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- 229910015118 LiMO Inorganic materials 0.000 description 1
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 1
- 229910014689 LiMnO Inorganic materials 0.000 description 1
- 229910013716 LiNi Inorganic materials 0.000 description 1
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 1
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical class CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 230000033228 biological regulation Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000007833 carbon precursor Substances 0.000 description 1
- 150000001733 carboxylic acid esters Chemical class 0.000 description 1
- 150000005678 chain carbonates Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
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- 239000011247 coating layer Substances 0.000 description 1
- 229910021446 cobalt carbonate Inorganic materials 0.000 description 1
- ZOTKGJBKKKVBJZ-UHFFFAOYSA-L cobalt(2+);carbonate Chemical compound [Co+2].[O-]C([O-])=O ZOTKGJBKKKVBJZ-UHFFFAOYSA-L 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
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- 150000005676 cyclic carbonates Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- OZJPLYNZGCXSJM-UHFFFAOYSA-N delta-Valerolactone Natural products O=C1CCCCO1 OZJPLYNZGCXSJM-UHFFFAOYSA-N 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- AFOSIXZFDONLBT-UHFFFAOYSA-N divinyl sulfone Chemical compound C=CS(=O)(=O)C=C AFOSIXZFDONLBT-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- BPFOYPDHLJUICH-UHFFFAOYSA-N ethenyl ethyl carbonate Chemical compound CCOC(=O)OC=C BPFOYPDHLJUICH-UHFFFAOYSA-N 0.000 description 1
- HHEIMYAXCOIQCJ-UHFFFAOYSA-N ethyl 2,2-dimethylpropanoate Chemical class CCOC(=O)C(C)(C)C HHEIMYAXCOIQCJ-UHFFFAOYSA-N 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- WDAXFOBOLVPGLV-UHFFFAOYSA-N isobutyric acid ethyl ester Chemical class CCOC(=O)C(C)C WDAXFOBOLVPGLV-UHFFFAOYSA-N 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 229910021439 lithium cobalt complex oxide Inorganic materials 0.000 description 1
- ACFSQHQYDZIPRL-UHFFFAOYSA-N lithium;bis(1,1,2,2,2-pentafluoroethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)C(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)C(F)(F)F ACFSQHQYDZIPRL-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000003345 natural gas Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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- 229920001690 polydopamine Polymers 0.000 description 1
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- 239000000243 solution Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—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
- H01M10/0566—Liquid materials
- H01M10/0569—Liquid materials characterised by the solvents
-
- 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
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- 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
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- 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
- H01M4/134—Electrodes based on metals, Si or alloys
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/386—Silicon or alloys based on silicon
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/483—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides for non-aqueous cells
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- H—ELECTRICITY
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Description
正極極板としては、炭酸コバルトの合成時にコバルトに対して0.1mol%のジルコニウムと、それぞれ1mol%のマグネシウムとアルミニウムとを共沈させ、これを熱分解反応させて、ジルコニウム、マグネシウム及びアルミニウム含有四三酸化コバルトを得た。これにリチウム源としての炭酸リチウムを混合し、850℃で20時間焼成して、ジルコニウム、マグネシウム、アルミニウム含有コバルト酸リチウム(LiCo0.979Zr0.001Mg0.01Al0.01O2)を得た。
(1)酸化ケイ素活物質の作製
酸化ケイ素として、組成がSiO(x=1)の粒子を、アルゴン雰囲気下でCVD法により炭素被覆を行った。炭素被覆後の粒子はアルゴン雰囲気下で1000℃で不均化処理を行った後、解砕、分級を行い、炭素被覆SiOを得た。なお、本発明の効果の発現は、炭素の被覆処理の有無によって限定されるものではないので、炭素の被覆処理は必ずしも必要な工程ではない。また、炭素被覆を行う場合は、その手法については種々の周知の方法を採用し得る。
非晶質炭素で被覆されていない黒鉛として、平均粒径が20μmの鱗片状人造黒鉛と、非晶質炭素で被覆された黒鉛と、酸化ケイ素とを所定の質量比になるように秤量・混合して負極活物質とした。なお、非晶質炭素で被覆された黒鉛は次のように調製した。まず、核となる鱗片状人造黒鉛と、この核の表面を被覆して非晶質炭素となる炭素前駆体としての石油ピッチを準備した。これらを不活性ガス雰囲気下で加熱しながら混合し、焼成した。その後、粉砕・分級して、平均粒径が20μmで、表面が非晶質炭素で被覆された黒鉛を作製した。非晶質炭素の被覆量は、非晶質炭素で被覆された黒鉛粒子中の非晶質炭素の割合で定義した。この負極活物質が97質量%、増粘剤としてのカルボキシメチルセルロース(CMC)が1.5質量%、結着材としてのスチレンブタジエンゴム(SBR)が1.5質量%となるようにNMP溶液中で混合し、負極合剤スラリーを調製した。この負極合材スラリーを厚さ8μmの銅製の集電体の量面にドクターブレード法により塗布して、負極集電体の両面に負極活物質合剤層を形成した。その後、乾燥した後に圧縮ローラーを用いて圧延し、所定サイズに裁断して負極極板を作製した。
エチレンカーボネート(EC)と、メチルエチルカーボネート(MEC)とジエチルカーボネート(DEC)とを体積比で30:60:10の割合で混合した後、ヘキサフルオロリン酸リチウム(LIPF6)をその濃度が1mol/Lとなるように溶解した。さらにビニレンカーボネート(VC)を非水電解液全体に対して2.0質量%とし添加して溶解させ、非水電解液を調製した。また、フルオロエチレンカーボネート(FEC)を添加する場合には、後述の表4に示した組成となるように各成分の配合比を調製した。
上記のようにして作製した正極極板及び負極極板を、ポリエチレン製微多孔質膜からなるセパレータを介して巻回し、最外周にポリプロピレン製のテープを張り付けて円筒状の巻回電極体を作製した。この後、プレスして偏平状の巻回電極体とした。また、樹脂層(ポリプロピレン)/接着剤層/アルミニウム合金層/接着材層/樹脂層(ポリプロピレン)の5層構造からなるシート状のラミネート材を用意し、このラミネート材を折り返して底部を形成すると共にカップ状の電極体収納空間を形成した。次いで、アルゴン雰囲気下のグローブボックス内で上記偏平状巻回電極体と上記非水電解質とをカップ状の電極体収納空間に挿入した。この後、ラミネート外装体内部を減圧してセパレータ内部に非水電解質を含浸させ、ラミネート外装体の開口部を封止して、高さ62mm、幅35mm、厚み3.6mmの非水電解質二次電池を作製した。得られた非水電解質二次電池の設計容量は、充電終止電圧4.4Vで、800mAhである。
各電池を25℃において、1It=800mAの定電流で、充電終止電圧4.4V時の電池設計容量である満充電容量に対して7%の充電を行い、その状態での電池厚みを測定した。次いで、非水電解液の浸透を促進させるため、60℃の恒温槽中で1日放置した後の電池厚みを測定し、放置前後の電池厚みの変化を電池厚み増分として求めた。
各電池を25℃において、1It=800mAの定電流で充電し、電池電圧が4.4Vに達した後は4.4Vの定電圧で充電電流が40mAになるまで充電し、その後、電流値1It=800mAの定電流で電池電圧が2.75Vとなるまで放電し、これを1サイクル目の充放電とし、1サイクル目の放電容量を求めた。同じ条件で充放電を繰り返し、300サイクル目の放電容量を求め、1サイクル目の放電容量に対する300サイクル目の放電容量の比を容量維持率として求めた。
各電池を25℃において、1It=800mAの定電流で充電し、電池電圧が4.4Vに達した後は4.4Vの定電圧で充電電流が40mAになるまで充電し、その後、電流値1It=800mAの定電流で電池電圧が2.75Vとなるまで放電し、これを1サイクル目の充放電とし、1サイクル目の放電容量を求めた。次に、各電池を25℃において、1It=800mAの定電流で充電し、電池電圧が4.4Vに達した後は4.4Vの定電圧で充電電流が40mAになるまで充電し、その後、電流値2It=1600mAの定電流で電池電圧が2.75Vとなるまで放電し、これを2サイクル目の放電とし、2サイクル目の放電容量を求めた。各電池の1サイクル目の放電容量に対する2サイクル目の放電容量の比を2It/1It放電負荷特性として求めた。
実施例1〜4及び比較例1〜3の非水電解質二次電池としては、負極活物質として、非晶質炭素の被覆量を1質量%一定とし、かつ、全負極活物質中の組成がSiO(x=1)である酸化ケイ素の添加量を3.5質量%一定とし、全黒鉛中の非晶質炭素で被覆されていない黒鉛の割合を100〜0質量%(非晶質炭素で被覆された黒鉛の割合を0〜100質量%)まで変化させたものを用いた。これらの各電池について、上記のようにして初期容量、電池厚み増分及びサイクル特性を測定した結果を、それぞれの負極活物質の組成と共に表1にまとめて示した。
実施例5〜7及び比較例4、5の非水電解質二次電池としては、負極活物質として、非晶質炭素の被覆量を1質量%一定とし、全黒鉛中の非晶質炭素で被覆されていない黒鉛の割合を80質量%(非晶質炭素で被覆された黒鉛の割合を20質量%)一定とし、かつ、全負極活物質中の組成がSiO(x=1)である酸化ケイ素の添加量を0.5〜25質量%まで変化させたものを用いた。これらの各電池について、上記のようにして初期容量、電池厚み増分及びサイクル特性を測定した結果を、それぞれの負極活物質の組成と共に表2にまとめて示した。
実施例8〜11の非水電解質二次電池としては、負極活物質として、全黒鉛中の非晶質炭素で被覆されていない黒鉛の割合を80質量%(非晶質炭素で被覆された黒鉛の割合を20質量%)一定とし、全負極活物質中の組成がSiO(x=1)である酸化ケイ素の添加量を3.5質量%一定とし、かつ、非晶質炭素の被覆量を0.1〜6.5質量%まで変化させたものを用いた。これらの各電池について、上記のようにして初期容量、電池厚み増分及びサイクル特性を測定した結果を、それぞれの負極活物質の組成と共に表3にまとめて示した。なお、表3には実施例1の電池の測定結果も併記した。
実施例12〜16の非水電解質二次電池としては、負極活物質として、全黒鉛中の非晶質炭素で被覆されていない黒鉛の割合を50質量%(非晶質炭素で被覆された黒鉛の割合を50質量%)一定とし、全負極活物質中の組成がSiO(x=1)である酸化ケイ素の添加量を3.5質量%一定とし、非晶質炭素の被覆量を1質量%一定とし、かつ、非水電解液の溶媒中のフルオロエチレンカーボネート(FEC)の含有割合を0〜35体積%まで変化させたものを用いた。
Claims (4)
- リチウムイオンの吸蔵・放出が可能な正極活物質を含む正極合剤層を備えた正極極板と、リチウムイオンの吸蔵・放出が可能な負極活物質を含む負極合剤層を備えた負極極板と、セパレータと、非水電解液と、を備える非水電解質二次電池において、
前記負極活物質は、
金属ケイ素及びSiOxで表される酸化ケイ素(0.5≦x<1.6)の少なくとも一方と黒鉛材料との混合物であり、
前記黒鉛材料中に非晶質炭素で被覆された黒鉛材料を20質量%以上、90質量%以下の割合で含み、
前記金属ケイ素及び酸化ケイ素の含有割合は、全負極活物質中の1質量%以上、20質量%以下であることを特徴とする非水電解質二次電池。 - 前記黒鉛材料中の前記非晶質炭素で被覆された黒鉛材料の割合は、50質量%以上、90質量%以下であることを特徴とする請求項1に記載の非水電解質二次電池。
- 前記非晶質炭素の被覆量は、前記非晶質炭素で被覆された黒鉛材料に対して0.5質量%以上、5質量%以下であることを特徴とする請求項1に記載の非水電解質二次電池。
- 前記非水電解液は、フルオロエチレンカーボネートを0.5体積%以上、30体積%以下の割合で含んでいることを特徴とする請求項1〜3のいずれかに記載の非水電解質二次電池。
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CN112886050B (zh) * | 2019-11-29 | 2022-07-05 | 宁德时代新能源科技股份有限公司 | 二次电池及含有该二次电池的装置 |
JP7168622B2 (ja) * | 2020-09-08 | 2022-11-09 | 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 | 電池およびその製造方法 |
CN115020684B (zh) * | 2022-07-26 | 2023-10-20 | 蜂巢能源科技股份有限公司 | 一种石墨、硅氧化物和硅复合的负极材料及其应用 |
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JP4965790B2 (ja) * | 2002-10-28 | 2012-07-04 | 株式会社Gsユアサ | 非水電解質二次電池 |
WO2003096449A1 (fr) * | 2002-05-08 | 2003-11-20 | Japan Storage Battery Co., Ltd. | Pile secondaire a electrolyte non aqueux |
CN1259740C (zh) * | 2003-05-20 | 2006-06-14 | 比亚迪股份有限公司 | 一种锂离子二次电池 |
CN100576610C (zh) * | 2006-12-22 | 2009-12-30 | 比亚迪股份有限公司 | 一种含硅复合材料及其制备方法 |
JP5192703B2 (ja) * | 2007-02-06 | 2013-05-08 | Necエナジーデバイス株式会社 | 非水電解質二次電池 |
JP2010092830A (ja) * | 2008-09-11 | 2010-04-22 | Sanyo Electric Co Ltd | 非水電解質二次電池 |
KR101057162B1 (ko) * | 2008-12-01 | 2011-08-16 | 삼성에스디아이 주식회사 | 음극활물질, 이를 구비하는 음극 및 리튬이차전지 |
JP4954270B2 (ja) * | 2009-02-13 | 2012-06-13 | 日立マクセルエナジー株式会社 | 非水二次電池 |
JP5698443B2 (ja) * | 2009-06-02 | 2015-04-08 | 三菱化学株式会社 | 非水系電解液および非水系電解液二次電池 |
JP5557003B2 (ja) * | 2010-03-19 | 2014-07-23 | 株式会社豊田自動織機 | 負極材料、非水電解質二次電池および負極材料の製造方法 |
US9876221B2 (en) * | 2010-05-14 | 2018-01-23 | Samsung Sdi Co., Ltd. | Negative active material for rechargeable lithium battery and rechargeable lithium battery including same |
JP5614307B2 (ja) * | 2011-01-26 | 2014-10-29 | 株式会社Gsユアサ | 非水電解質二次電池 |
CN102185128B (zh) * | 2011-04-02 | 2012-11-28 | 上海交通大学 | 一种硅碳复合材料及其制备方法 |
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