JP4070793B2 - 非水電解液及び該電解液を用いた非水電解液二次電池 - Google Patents
非水電解液及び該電解液を用いた非水電解液二次電池 Download PDFInfo
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- JP4070793B2 JP4070793B2 JP2006122217A JP2006122217A JP4070793B2 JP 4070793 B2 JP4070793 B2 JP 4070793B2 JP 2006122217 A JP2006122217 A JP 2006122217A JP 2006122217 A JP2006122217 A JP 2006122217A JP 4070793 B2 JP4070793 B2 JP 4070793B2
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- aqueous electrolyte
- secondary battery
- carbon atoms
- electrolyte secondary
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- 239000011255 nonaqueous electrolyte Substances 0.000 title claims description 86
- 239000003792 electrolyte Substances 0.000 title claims description 19
- -1 phenyloxy group Chemical group 0.000 claims description 88
- 125000004432 carbon atom Chemical group C* 0.000 claims description 45
- 239000003960 organic solvent Substances 0.000 claims description 19
- 150000003377 silicon compounds Chemical class 0.000 claims description 19
- 239000008151 electrolyte solution Substances 0.000 claims description 17
- 125000001153 fluoro group Chemical group F* 0.000 claims description 10
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- 125000004419 alkynylene group Chemical group 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 8
- 125000003118 aryl group Chemical group 0.000 claims description 7
- 229910052731 fluorine Inorganic materials 0.000 claims description 7
- 125000005843 halogen group Chemical group 0.000 claims description 7
- 125000003342 alkenyl group Chemical group 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- 125000000304 alkynyl group Chemical group 0.000 claims description 6
- 125000000732 arylene group Chemical group 0.000 claims description 6
- 229910013870 LiPF 6 Inorganic materials 0.000 claims description 5
- 125000004423 acyloxy group Chemical group 0.000 claims description 5
- 125000001273 sulfonato group Chemical group [O-]S(*)(=O)=O 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 125000003302 alkenyloxy group Chemical group 0.000 claims description 4
- 125000003545 alkoxy group Chemical group 0.000 claims description 4
- 125000002947 alkylene group Chemical group 0.000 claims description 4
- 125000005530 alkylenedioxy group Chemical group 0.000 claims description 4
- 125000005133 alkynyloxy group Chemical group 0.000 claims description 4
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 4
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- 125000001820 oxy group Chemical group [*:1]O[*:2] 0.000 claims description 3
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- WLPCAERCXQSYLQ-UHFFFAOYSA-N isotianil Chemical group ClC1=NSC(C(=O)NC=2C(=CC=CC=2)C#N)=C1Cl WLPCAERCXQSYLQ-UHFFFAOYSA-N 0.000 claims description 2
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 2
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- 238000011156 evaluation Methods 0.000 description 5
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- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
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- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
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- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
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- 238000002360 preparation method Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- ACEKLXZRZOWKRY-UHFFFAOYSA-M 1,1,2,2,3,3,4,4,5,5,5-undecafluoropentane-1-sulfonate Chemical compound [O-]S(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F ACEKLXZRZOWKRY-UHFFFAOYSA-M 0.000 description 2
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- QCBBOXGEDQONFF-UHFFFAOYSA-N 5-oxo-5-tridecoxypentane-1,2,3-tricarboxylic acid Chemical compound CCCCCCCCCCCCCOC(=O)CC(C(O)=O)C(C(O)=O)CC(O)=O QCBBOXGEDQONFF-UHFFFAOYSA-N 0.000 description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
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- 229910013290 LiNiO 2 Inorganic materials 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical compound CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 2
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- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 2
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
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- 239000000571 coke Substances 0.000 description 2
- 238000010277 constant-current charging Methods 0.000 description 2
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- 239000010949 copper Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- KZTYYGOKRVBIMI-UHFFFAOYSA-N diphenyl sulfone Chemical compound C=1C=CC=CC=1S(=O)(=O)C1=CC=CC=C1 KZTYYGOKRVBIMI-UHFFFAOYSA-N 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- GAEKPEKOJKCEMS-UHFFFAOYSA-N gamma-valerolactone Chemical compound CC1CCC(=O)O1 GAEKPEKOJKCEMS-UHFFFAOYSA-N 0.000 description 2
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- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
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- UKJARPDLRWBRAX-UHFFFAOYSA-N n,n'-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexane-1,6-diamine Chemical compound C1C(C)(C)NC(C)(C)CC1NCCCCCCNC1CC(C)(C)NC(C)(C)C1 UKJARPDLRWBRAX-UHFFFAOYSA-N 0.000 description 2
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- AXRSHKZFNKUGQB-UHFFFAOYSA-N octyl diphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OCCCCCCCC)OC1=CC=CC=C1 AXRSHKZFNKUGQB-UHFFFAOYSA-N 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- RJQRCOMHVBLQIH-UHFFFAOYSA-N pentane-1-sulfonic acid Chemical compound CCCCCS(O)(=O)=O RJQRCOMHVBLQIH-UHFFFAOYSA-N 0.000 description 1
- 125000002255 pentenyl group Chemical group C(=CCCC)* 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011301 petroleum pitch Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- KCXFHTAICRTXLI-UHFFFAOYSA-N propane-1-sulfonic acid Chemical compound CCCS(O)(=O)=O KCXFHTAICRTXLI-UHFFFAOYSA-N 0.000 description 1
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 description 1
- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- DNIAPMSPPWPWGF-UHFFFAOYSA-N propylene glycol Substances CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- MBDNRNMVTZADMQ-UHFFFAOYSA-N sulfolene Chemical compound O=S1(=O)CC=CC1 MBDNRNMVTZADMQ-UHFFFAOYSA-N 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- LVEOKSIILWWVEO-UHFFFAOYSA-N tetradecyl 3-(3-oxo-3-tetradecoxypropyl)sulfanylpropanoate Chemical compound CCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCC LVEOKSIILWWVEO-UHFFFAOYSA-N 0.000 description 1
- WUPCFMITFBVJMS-UHFFFAOYSA-N tetrakis(1,2,2,6,6-pentamethylpiperidin-4-yl) butane-1,2,3,4-tetracarboxylate Chemical compound C1C(C)(C)N(C)C(C)(C)CC1OC(=O)CC(C(=O)OC1CC(C)(C)N(C)C(C)(C)C1)C(C(=O)OC1CC(C)(C)N(C)C(C)(C)C1)CC(=O)OC1CC(C)(C)N(C)C(C)(C)C1 WUPCFMITFBVJMS-UHFFFAOYSA-N 0.000 description 1
- NZNAAUDJKMURFU-UHFFFAOYSA-N tetrakis(2,2,6,6-tetramethylpiperidin-4-yl) butane-1,2,3,4-tetracarboxylate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CC(C(=O)OC1CC(C)(C)NC(C)(C)C1)C(C(=O)OC1CC(C)(C)NC(C)(C)C1)CC(=O)OC1CC(C)(C)NC(C)(C)C1 NZNAAUDJKMURFU-UHFFFAOYSA-N 0.000 description 1
- YODZTKMDCQEPHD-UHFFFAOYSA-N thiodiglycol Chemical compound OCCSCCO YODZTKMDCQEPHD-UHFFFAOYSA-N 0.000 description 1
- 150000003606 tin compounds Chemical class 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-M triflate Chemical compound [O-]S(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-M 0.000 description 1
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 1
- QQBLOZGVRHAYGT-UHFFFAOYSA-N tris-decyl phosphite Chemical compound CCCCCCCCCCOP(OCCCCCCCCCC)OCCCCCCCCCC QQBLOZGVRHAYGT-UHFFFAOYSA-N 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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- 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
- H01M10/0567—Liquid materials characterised by the additives
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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
- H01M10/00—Secondary cells; Manufacture thereof
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- H01M10/052—Li-accumulators
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- H—ELECTRICITY
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- H01M10/00—Secondary cells; Manufacture thereof
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- 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
- H01M10/0568—Liquid materials characterised by the solutes
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- H—ELECTRICITY
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- 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
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- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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Description
しかし、非水電解液二次電池は、低温時あるいは充放電を繰り返すことで電気容量の低下や内部抵抗の上昇を示し、安定した電力供給源としての信頼性が不足していた。
本発明の非水電解液において用いられるケイ素化合物を表す上記の一般式(1)において、R 4 、R5 、R6 及びR7 で表される炭素原子数1〜10のアルキル基としては、メチル、エチル、プロピル、ブチル、第二ブチル、第三ブチル、ペンチル、ヘキシル、ヘプチル、オクチル、2−エチル−ヘキシル、ノニル、デシル等が挙げられる。炭素原子数1〜10のアルコキシ基としては、上記炭素原子数1〜10のアルキル基から誘導されるアルコキシ基が挙げられる。R4 、R5 、R6 及びR7で表される炭素原子数2〜10のアルケニル基としては、ビニル、アリル、1−プロペニル、イソプロペニル、2−ブテニル、1,3−ブタジエニル、2−ペンテニル、2−オクテニル、ノネニル、 デセニル等が挙げられ、炭素原子数2〜10のアルケニルオキシ基としては、上記炭素原子数2〜10のアルケニル基から誘導されるアルケニルオキシ基が挙げられる。R4 、R5 、R6 、R7及びR8で表される炭素原子数2〜8のアルキニル基としては、エチニル、2−プロピニル、1,1−ジメチル−2−プロピニル等が挙げられ、R4 、R5 、R6 及びR7で表される炭素原子数2〜8のアルキニルオキシ基としては、上記炭素原子数2〜8のアルキニル基から誘導されるアルキニルオキシ基が挙げられる。R 8 で表される炭素原子数5〜8のシクロアルキル基としては、シクロペンチル、シクロヘキシル、シクロヘプチル、シクロオクチル、2−ノルボルニル等が挙げられる。また、R8 で表される炭素原子数5〜8のシクロアルケニル基としては、シクロペンテニル、シクロヘキセニル、シクロヘプテニル、シクロオクテニル、2−ノルボルネニル等が挙げられる。また、R 8 及びR9 で表されるハロゲン原子としては、フッ素原子、塩素原子、臭素原子、ヨウ素原子等が挙げられる。またR8又はR9で表される炭素原子数2〜8のアシロキシ基としては、アセトキシ、プロピオニロキシ、トリフルオロアセトキシ、ジフルオロアセトキシ等が挙げられ、炭素原子数1〜8のスルホネート基としては、メタンスルホネート、エタンスルホネート、プロパンスルホネート、ブタンスルホネート、ペンタンスルホネート、ヘキサンスルホネート、ヘプタンスルホネート、オクタンスルホネート、トリフルオロメタンスルホネート、ペンタフルオロエタンスルホネート、ヘキサフルオロプロパンスルホネート、パーフルオロブタンスルホネート、パーフルオロペンタンスルホネート、パーフルオロヘキサンスルホネート、パーフルオロヘプタンスルホネート、パーフルオロオクタンスルホネート等が挙げられる。Yで表されるアルキレン基及びアルキレンジオキシ基としては、メチレン、エチレン、トリメチレン、2,2−ジメチルトリメチレン、テトラメチレン、ペンタメチレン、ヘキサメチレン等の炭素原子数1〜8のアルキレン基又はこれらの基から誘導されるアルキレンジオキシ基が挙げられる。アルケニレン基及びアルケニレンジオキシ基としては、ビニレン、プロペニレン、イソプロペニレン、ブテニレン、ペンテニレン等の炭素原子数2〜8のアルケニレン基又はこれらの基から誘導されるアルケニレンジオキシ基が挙げられる。アルキニレン基及びアルキニレンジオキシ基としては、エチニレン、プロピニレン、ブチニレン、ペンチニレン、1,1,4,4−テトラメチルブテニレン等の炭素原子数2〜8のアルキニレン基又はアルキニレンジオキシ基が挙げられる。アリーレン基及びアリーレンジオキシ基としては、フェニレン、メチルフェニレン、ジメチルフェニレン、第三ブチルフェニレン等の炭素原子数6〜12のアリーレン基又はこれらの基から誘導されるアリーレンジオキシ基が挙げられる。
その他、アセトニトリル、プロピオニトリル、ニトロメタンやこれらの誘導体を上記有機溶媒として用いることもできる。
)アクリル酸及びその種々のエステル類等を主体とする高分子化合物やその誘導体、これらの共重合体や混合物からなるフィルム等が挙げられる。これらのフィルムは、単独で用いてもよいし、これらのフィルムを重ね合わせて複層フィルムとして用いてもよい。さらに、これらのフィルムには、種々の添加剤を用いてもよく、その種類や含有量は特に制限されない。これらのフィルムの中でも、本発明の非水電解液二次電池には、ポリエチレンやポリプロピレン、ポリフッ化ビニリデン、ポリスルホンからなるフィルムが好ましく用いられる。
きる正極、1aは正極集電体、2は正極から放出されたリチウムイオンを吸蔵、放出できる炭素質材料よりなる負極、2aは負極集電体、3は本発明の非水電解液、4はステンレス製の正極ケース、5はステンレス製の負極ケース、6はポリプロピレン製のガスケット、7はポリエチレン製のセパレータである。
<作製手順>
(正極の作製)
正極活物質としてLiNiO2 85質量部、導電材としてアセチレンブラック10質量部、及び結着剤としてポリフッ化ビニリデン(PVDF)5質量部を混合して、正極材料とした。この正極材料をN−メチル−2−ピロリドン(NMP)に分散させ、スラリー状とした。このスラリーをアルミニウム製の正極集電体両面に塗布し、乾燥後、プレス成型して、正極板とした。その後、この正極板を所定の大きさにカットし、電流取り出し用のリードタブ溶接部となる部分の電極合剤を掻き取ることでシート状正極を作製した。
負極活物質として炭素材料粉末92.5質量部、及び結着剤としてPVDF7.5質量部を混合して、負極材料とした。この負極材料をNMPに分散させてスラリー状とした。このスラリーを銅製の負極集電体両面に塗布し、乾燥後、プレス成型して、負極板とした。その後、この負極板を所定の大きさにカットし、電流取り出し用のリードタブ溶接部となる部分の電極合剤を掻き取ることでシート状負極を作製した。
有機溶媒を後述の実施例及び比較例において示す配合量(体積%)で混合し、さらに、LiPF6 を1モル/リットルの濃度で溶解し、試験化合物(表1記載)を表1記載の配合量(体積%)で添加して非水電解液とした。
得られたシート状正極及びシート状負極を、厚さ25μmのポリエチレン製の微多孔フィルムを介した状態で巻回させて、巻回型電極体を形成した。得られた巻回型電極体をケースの内部に挿入し、ケース内に保持した。このとき、シート状正極あるいはシート状負極のリードタブ溶接部に一端が溶接された集電リードを、ケースの正極端子あるいは負極端子にそれぞれ接合した。その後、非水電解液を巻回型電極体が保持されたケース内に注入し、ケースを密閉、封止して、φ18mm、軸方向の長さ65mmの円筒型リチウム二次電池を製作した。
エチレンカーボネート30体積%、エチルメチルカーボネート40体積%及びジメチルカーボネート30体積%からなる混合溶媒に、LiPF6 を1モル/リットルの濃度で溶
解し、試験化合物(表1参照)を加えて、非水電解液とした。上記非水電解液を用いてリチウム二次電池を作製し、該リチウム二次電池について、下記試験方法に従って、サイクル特性試験及び低温特性評価試験を行った。サイクル特性試験においては、放電容量維持率(%)及び内部抵抗増加率(%)を、低温特性評価試験においては、放電容量率(%)及び内部抵抗比を求めた。サイクル特性試験及び低温特性評価試験の試験方法は、それぞれ以下の通りである。
リチウム二次電池を、雰囲気温度60℃の恒温槽内に入れ、充電電流2.2mA/cm2 で4.1Vまで定電流充電し、放電電流2.2mA/cm2 で3Vまで定電流放電を行うサイクルを500回繰り返して行った。その後、雰囲気温度を20℃に戻して、充電電流1.1mA/cm2 で4.1Vまで定電流定電圧充電し、放電電流0.33mA/cm2 で3.0Vまで定電流放電し、このときの放電容量と初期放電容量とから、下記式により放電容量維持率(%)を求めた。また、上記の500回のサイクルの前後に、20℃における内部抵抗を測定し、その測定結果から下記式により内部抵抗増加率(%)を求めた。尚、リチウム二次電池の初期放電容量及び内部抵抗は、下記測定方法により、それぞれ測定した。
放電容量維持率(%)=[(サイクル後の放電容量)/(初期放電容量) ]×100
内部抵抗増加率(%)=[(サイクル後の内部抵抗)/(サイクル前の内部抵抗) ]×100
まず、充電電流0.25mA/cm2で4.1Vまで定電流定電圧充電し、放電電流0.33mA/cm2で3.0Vまで定電流放電を行った。次に、充電電流1.1mA/cm2で4.1Vまで定電流定電圧充電し、放電電流1.1mA/cm2で3.0Vまで定電流放電する操作を4回行った。その後、充電電流1.1mA/cm2で4.1Vまで定電流定電圧充電し、放電電流0.33mA/cm2で3.0Vまで定電流放電し、この時の放電容量を電池初期容量とした。なお、測定は20℃の雰囲気で行った。
まず、充電電流1.1mA/cm2 で3.75Vまで定電流定電圧充電し、交流インピーダンス測定装置((株)東陽テクニカ製:周波数応答アナライザsolartron1260、ポテンショ/ガルバノスタットsolartron1287)を用いて、周波数100kHz〜0.02Hzまで走査し、縦軸に虚数部、横軸に実数部を示すコール−コールプロットを作成した。続いて、このコール−コールプロットにおいて、円弧部分を円でフィッティングして、この円の実数部分と交差する二点のうち、大きい方の値を抵抗値とし、電池の内部抵抗とした。
上記サイクル特性試験方法における初期放電容量測定方法と同様にして、20℃での放電容量を測定した。また、測定温度を−30℃に代えた以外は、上記初期放電容量測定方法と同様にして、−30℃での放電容量を測定した。20℃での放電容量及び−30℃での放電容量から、下記式により放電容量率(%)を求めた。
また、上記サイクル特性試験方法における内部抵抗測定方法と同様にして、20℃及び−30℃それぞれにおいて、内部抵抗を測定し、その測定結果から下記式により内部抵抗比を求めた。
放電容量率(%)=(−30℃での放電容量)/(20℃での放電容量)×100
内部抵抗比=(−30℃での内部抵抗)/(20℃での内部抵抗)
1における初期放電容量に対して、実施例1−1〜1−12及び比較例1−2〜1−5における初期放電容量は、同等以上の値をそれぞれ示した。
1a 正極集電体
2 負極
2a 負極集電体
3 電解液
4 正極ケース
5 負極ケース
6 ガスケット
7 セパレータ
10 コイン型の非水電解液二次電池
10’円筒型の非水電解液二次電池
11 負極
12 負極集合体
13 正極
14 正極集合体
15 電解液
16 セパレータ
17 正極端子
18 負極端子
19 負極板
20 負極リード
21 正極
22 正極リード
23 ケース
24 絶縁板
25 ガスケット
26 安全弁
27 PTC素子
Claims (13)
- 電解質塩を有機溶媒に溶解した電解液において、下記の一般式(1)で表されるケイ素化合物のうち少なくとも1種以上を含有することを特徴とする非水電解液二次電池用非水電解液。
- 上記一般式(1)において、Yがエテニレン基であり、R8 及びR9がフッ素原子であ
る請求項1記載の非水電解液二次電池用非水電解液。 - 上記一般式(1)において、Yがエチニレン基であり、R8 及びR9 がフッ素原子である請求項1記載の非水電解液二次電池用非水電解液。
- 上記一般式(1)において、Yが直接結合であり、R8 がエチニル基であり、R9 がフッ素原子で置換されたアリール基である請求項1記載の非水電解液二次電池用非水電解液。
- 上記一般式(1)において、Yが直接結合であり、R8 がフッ素原子で置換されたアリ
ール基であり、R9 がフッ素原子である請求項1記載の非水電解液二次電池用非水電解液。 - 上記一般式(1)において、Yが直接結合であり、R8 がビニル基であり、R9 がフッ素原子である請求項1記載の非水電解液二次電池用非水電解液。
- 上記一般式(1)において、Yが直接結合であり、R8 及びR9 がフッ素原子で置換されたアリール基である請求項1記載の非水電解液二次電池用非水電解液。
- 上記一般式(1)において、Yがエチレン基であり、R8とR9がフッ素原子である請求項1記載の非水電解液二次電池用非水電解液。
- 上記有機溶媒が、環状カーボネート化合物、鎖状カーボネート化合物、環状エステル化合物、鎖状エステル化合物、スルホン又はスルホキシド化合物、アマイド化合物、鎖状エーテル化合物及び環状エーテル化合物からなる群から選ばれた一種以上を含む請求項1〜8のいずれかに記載の非水電解液二次電池用非水電解液。
- 上記有機溶媒が、環状カーボネート化合物と鎖状カーボネート化合物とをそれぞれ一種以上含有している請求項9記載の非水電解液二次電池用非水電解液。
- 上記電解質塩が、LiPF6 、LiBF4 、LiClO4 及びLiAsF6 からなる無機塩並びにLiCF3 SO3 、LiN(CF3 SO2 )3 及びLiC(CF3 SO2 )3 からなる有機塩からなる群から選ばれる一種以上である請求項1〜10のいずれかに記載の非水電解液二次電池用非水電解液。
- 上記一般式(1)で表されるケイ素化合物の含有量が、非水電解液中、0.05〜5体積%である請求項1〜11のいずれかに記載の非水電解液二次電池用非水電解液。
- 電解液として請求項1〜12のいずれかに記載の非水電解液二次電池用非水電解液を含む非水電解液二次電池。
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JP2006122217A JP4070793B2 (ja) | 2005-05-30 | 2006-04-26 | 非水電解液及び該電解液を用いた非水電解液二次電池 |
US11/441,007 US20060269843A1 (en) | 2005-05-30 | 2006-05-26 | Nonaqueous electrolyte and nonaqueous electrolyte secondary battery using the same |
FR0604824A FR2886464A1 (fr) | 2005-05-30 | 2006-05-30 | Electrolyte non aqueux, et batterie secondaire utilisant cet electrolyte |
DE102006025471A DE102006025471A1 (de) | 2005-05-30 | 2006-05-30 | Nicht-wässriger Elektrolyt und Sekundärbatterie mit nicht-wässrigem Elektrolyten unter Verwendung desselben |
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JP (1) | JP4070793B2 (ja) |
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JP5072379B2 (ja) * | 2007-01-26 | 2012-11-14 | 株式会社デンソー | 非水電解液及び該電解液を用いた二次電池 |
KR20100105590A (ko) * | 2007-11-09 | 2010-09-29 | 이 아이 듀폰 디 네모아 앤드 캄파니 | 전기화학 커패시터를 위한 개선된 분리막 |
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JP5277045B2 (ja) * | 2009-03-31 | 2013-08-28 | 三和油化工業株式会社 | 非水電解液及びそれを用いたリチウムイオン二次電池 |
JP5491766B2 (ja) * | 2009-05-21 | 2014-05-14 | 株式会社デンソー | 非水電解液及び該電解液を有する非水電解液二次電池 |
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US9240614B2 (en) | 2010-06-04 | 2016-01-19 | Ube Industries, Ltd. | Nonaqueous electrolyte solution and electrochemical element using same |
JP2012003994A (ja) * | 2010-06-17 | 2012-01-05 | Sony Corp | 非水電解質電池および非水電解質 |
JP5781294B2 (ja) * | 2010-11-16 | 2015-09-16 | 株式会社Adeka | 非水電解液二次電池 |
JP5781293B2 (ja) | 2010-11-16 | 2015-09-16 | 株式会社Adeka | 非水電解液二次電池 |
JP5906761B2 (ja) * | 2011-01-31 | 2016-04-20 | 三菱化学株式会社 | 非水系電解液及びそれを用いた非水系電解液二次電池 |
KR102061631B1 (ko) * | 2011-01-31 | 2020-01-02 | 미쯔비시 케미컬 주식회사 | 비수계 전해액 및 이를 이용한 비수계 전해액 2차 전지 |
JP5906762B2 (ja) * | 2011-02-08 | 2016-04-20 | 三菱化学株式会社 | 非水系電解液及びそれを用いた非水系電解液二次電池 |
CN103339783B (zh) * | 2011-03-04 | 2016-12-07 | 株式会社电装 | 电池用非水电解液及使用了该电解液的非水电解液二次电池 |
JP5823261B2 (ja) | 2011-11-10 | 2015-11-25 | 株式会社Adeka | 非水電解液及び該電解液を用いた非水電解液二次電池 |
CN103130825B (zh) * | 2011-11-30 | 2016-12-21 | 株式会社艾迪科 | 1,3‑二氟二硅氧烷化合物的制造方法 |
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KR102483368B1 (ko) * | 2015-12-01 | 2023-01-02 | 솔브레인 주식회사 | 리튬 이차 전지용 전해질 및 이를 포함하는 리튬 이차 전지 |
CN106935801A (zh) * | 2015-12-31 | 2017-07-07 | 比亚迪股份有限公司 | 一种锂离子电池非水电解液、锂离子电池负极及包含该负极的锂离子电池 |
KR102473533B1 (ko) * | 2016-02-29 | 2022-12-05 | 삼성에스디아이 주식회사 | 리튬전지용 전해질 및 이를 포함하는 리튬전지 |
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- 2006-05-30 FR FR0604824A patent/FR2886464A1/fr not_active Withdrawn
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