WO2014050877A1 - 非水電解液、電気化学デバイス、リチウムイオン二次電池、及び、モジュール - Google Patents
非水電解液、電気化学デバイス、リチウムイオン二次電池、及び、モジュール Download PDFInfo
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- WO2014050877A1 WO2014050877A1 PCT/JP2013/075884 JP2013075884W WO2014050877A1 WO 2014050877 A1 WO2014050877 A1 WO 2014050877A1 JP 2013075884 W JP2013075884 W JP 2013075884W WO 2014050877 A1 WO2014050877 A1 WO 2014050877A1
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- WIPO (PCT)
- Prior art keywords
- carbonate
- compound
- general formula
- fluorine
- ppm
- Prior art date
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- 239000011255 nonaqueous electrolyte Substances 0.000 title claims abstract description 26
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 24
- 150000001875 compounds Chemical class 0.000 claims abstract description 139
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 53
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000011737 fluorine Substances 0.000 claims abstract description 52
- 150000005678 chain carbonates Chemical class 0.000 claims abstract description 32
- 150000005676 cyclic carbonates Chemical class 0.000 claims abstract description 31
- 239000002904 solvent Substances 0.000 claims abstract description 16
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 14
- 239000003792 electrolyte Substances 0.000 claims abstract description 10
- 150000003839 salts Chemical class 0.000 claims abstract description 10
- 239000008151 electrolyte solution Substances 0.000 claims description 29
- 239000003125 aqueous solvent Substances 0.000 claims description 28
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 14
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 claims description 13
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims description 13
- 125000004432 carbon atom Chemical group C* 0.000 claims description 10
- GVNVAWHJIKLAGL-UHFFFAOYSA-N 2-(cyclohexen-1-yl)cyclohexan-1-one Chemical compound O=C1CCCCC1C1=CCCCC1 GVNVAWHJIKLAGL-UHFFFAOYSA-N 0.000 claims description 3
- 101150065749 Churc1 gene Proteins 0.000 claims description 3
- 102100038239 Protein Churchill Human genes 0.000 claims description 3
- 238000003860 storage Methods 0.000 abstract description 20
- 239000012535 impurity Substances 0.000 abstract description 15
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 abstract 1
- GBPVMEKUJUKTBA-UHFFFAOYSA-N methyl 2,2,2-trifluoroethyl carbonate Chemical compound COC(=O)OCC(F)(F)F GBPVMEKUJUKTBA-UHFFFAOYSA-N 0.000 description 36
- -1 alkylene carbonates Chemical class 0.000 description 25
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 14
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 13
- 238000004821 distillation Methods 0.000 description 12
- NIQAXIMIQJNOKY-UHFFFAOYSA-N ethyl 2,2,2-trifluoroethyl carbonate Chemical compound CCOC(=O)OCC(F)(F)F NIQAXIMIQJNOKY-UHFFFAOYSA-N 0.000 description 11
- 229910013870 LiPF 6 Inorganic materials 0.000 description 10
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 9
- 239000010408 film Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 238000000746 purification Methods 0.000 description 9
- 239000006227 byproduct Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
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- 230000015572 biosynthetic process Effects 0.000 description 7
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 7
- 229920000573 polyethylene Polymers 0.000 description 7
- 229920001155 polypropylene Polymers 0.000 description 7
- 238000003786 synthesis reaction Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- 229910003002 lithium salt Inorganic materials 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 5
- 229910013063 LiBF 4 Inorganic materials 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 150000002170 ethers Chemical class 0.000 description 5
- 159000000002 lithium salts Chemical class 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000007774 positive electrode material Substances 0.000 description 5
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 4
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910013075 LiBF Inorganic materials 0.000 description 4
- 229910013872 LiPF Inorganic materials 0.000 description 4
- 101150058243 Lipf gene Proteins 0.000 description 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 239000005062 Polybutadiene Substances 0.000 description 4
- 239000012300 argon atmosphere Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 4
- GAEKPEKOJKCEMS-UHFFFAOYSA-N gamma-valerolactone Chemical compound CC1CCC(=O)O1 GAEKPEKOJKCEMS-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 229920002857 polybutadiene Polymers 0.000 description 4
- 239000002562 thickening agent Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 229910021383 artificial graphite Inorganic materials 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 3
- 229910052733 gallium Inorganic materials 0.000 description 3
- 229910052732 germanium Inorganic materials 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 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 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
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- 239000000126 substance Substances 0.000 description 3
- 238000001308 synthesis method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910052718 tin Inorganic materials 0.000 description 3
- ILWRPSCZWQJDMK-UHFFFAOYSA-N triethylazanium;chloride Chemical compound Cl.CCN(CC)CC ILWRPSCZWQJDMK-UHFFFAOYSA-N 0.000 description 3
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- 239000011701 zinc Substances 0.000 description 3
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 2
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- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 2
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- SYLNJGIBLUVXCG-UHFFFAOYSA-N carbonic acid;prop-1-yne Chemical compound CC#C.OC(O)=O SYLNJGIBLUVXCG-UHFFFAOYSA-N 0.000 description 2
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- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 2
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- 229910002995 LiNi0.8Co0.15Al0.05O2 Inorganic materials 0.000 description 1
- 229910015915 LiNi0.8Co0.2O2 Inorganic materials 0.000 description 1
- 229910014422 LiNi1/3Mn1/3Co1/3O2 Inorganic materials 0.000 description 1
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 1
- 229910001228 Li[Ni1/3Co1/3Mn1/3]O2 (NCM 111) Inorganic materials 0.000 description 1
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical compound CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 description 1
- GQWNECFJGBQMBO-UHFFFAOYSA-N Molindone hydrochloride Chemical compound Cl.O=C1C=2C(CC)=C(C)NC=2CCC1CN1CCOCC1 GQWNECFJGBQMBO-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 description 1
- GTDPSWPPOUPBNX-UHFFFAOYSA-N ac1mqpva Chemical compound CC12C(=O)OC(=O)C1(C)C1(C)C2(C)C(=O)OC1=O GTDPSWPPOUPBNX-UHFFFAOYSA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- RDOXTESZEPMUJZ-UHFFFAOYSA-N anisole Chemical class COC1=CC=CC=C1 RDOXTESZEPMUJZ-UHFFFAOYSA-N 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 229960002092 busulfan Drugs 0.000 description 1
- ZTCLFSRIWSZUHZ-UHFFFAOYSA-N but-1-yne;carbonic acid Chemical compound CCC#C.OC(O)=O ZTCLFSRIWSZUHZ-UHFFFAOYSA-N 0.000 description 1
- CJBYUPBUSUVUFH-UHFFFAOYSA-N buta-1,3-diene;carbonic acid Chemical class C=CC=C.OC(O)=O CJBYUPBUSUVUFH-UHFFFAOYSA-N 0.000 description 1
- RSYNHXZMASRGMC-UHFFFAOYSA-N butan-2-yl hydrogen carbonate Chemical compound CCC(C)OC(O)=O RSYNHXZMASRGMC-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- ZNNZFUYGJVHLGX-UHFFFAOYSA-N carbonic acid;fluoroethyne Chemical compound FC#C.OC(O)=O ZNNZFUYGJVHLGX-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 150000001733 carboxylic acid esters Chemical class 0.000 description 1
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 150000004292 cyclic ethers Chemical class 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- HHNHBFLGXIUXCM-GFCCVEGCSA-N cyclohexylbenzene Chemical compound [CH]1CCCC[C@@H]1C1=CC=CC=C1 HHNHBFLGXIUXCM-GFCCVEGCSA-N 0.000 description 1
- STZIXLPVKZUAMV-UHFFFAOYSA-N cyclopentane-1,1,2,2-tetracarboxylic acid Chemical compound OC(=O)C1(C(O)=O)CCCC1(C(O)=O)C(O)=O STZIXLPVKZUAMV-UHFFFAOYSA-N 0.000 description 1
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- UAEWCWCMYQAIDR-UHFFFAOYSA-N diethyl methyl phosphate Chemical compound CCOP(=O)(OC)OCC UAEWCWCMYQAIDR-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- NKDDWNXOKDWJAK-UHFFFAOYSA-N dimethoxymethane Chemical compound COCOC NKDDWNXOKDWJAK-UHFFFAOYSA-N 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- RIFGWPKJUGCATF-UHFFFAOYSA-N ethyl chloroformate Chemical compound CCOC(Cl)=O RIFGWPKJUGCATF-UHFFFAOYSA-N 0.000 description 1
- JQVXMIPNQMYRPE-UHFFFAOYSA-N ethyl dimethyl phosphate Chemical compound CCOP(=O)(OC)OC JQVXMIPNQMYRPE-UHFFFAOYSA-N 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- VANNPISTIUFMLH-UHFFFAOYSA-N glutaric anhydride Chemical compound O=C1CCCC(=O)O1 VANNPISTIUFMLH-UHFFFAOYSA-N 0.000 description 1
- 238000004770 highest occupied molecular orbital Methods 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- MBABOKRGFJTBAE-UHFFFAOYSA-N methyl methanesulfonate Chemical compound COS(C)(=O)=O MBABOKRGFJTBAE-UHFFFAOYSA-N 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- PYLWMHQQBFSUBP-UHFFFAOYSA-N monofluorobenzene Chemical compound FC1=CC=CC=C1 PYLWMHQQBFSUBP-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- MHYFEEDKONKGEB-UHFFFAOYSA-N oxathiane 2,2-dioxide Chemical compound O=S1(=O)CCCCO1 MHYFEEDKONKGEB-UHFFFAOYSA-N 0.000 description 1
- YYSONLHJONEUMT-UHFFFAOYSA-N pentan-3-yl hydrogen carbonate Chemical compound CCC(CC)OC(O)=O YYSONLHJONEUMT-UHFFFAOYSA-N 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- MBDNRNMVTZADMQ-UHFFFAOYSA-N sulfolene Chemical compound O=S1(=O)CC=CC1 MBDNRNMVTZADMQ-UHFFFAOYSA-N 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 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
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/60—Liquid electrolytes characterised by the solvent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/022—Electrolytes; Absorbents
- H01G9/035—Liquid electrolytes, e.g. impregnating 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/50—Electrodes characterised by their material specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/64—Liquid electrolytes characterised by additives
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/145—Liquid electrolytic capacitors
-
- 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
- H01M10/0567—Liquid materials characterised by the additives
-
- 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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
- H01M2300/0028—Organic electrolyte characterised by the solvent
- H01M2300/0034—Fluorinated solvents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
- H01M2300/0028—Organic electrolyte characterised by the solvent
- H01M2300/0037—Mixture of solvents
-
- 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
- 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
- Y02E60/13—Energy storage using capacitors
Definitions
- the present invention relates to a non-aqueous electrolyte containing a non-aqueous solvent and an electrolyte salt with a reduced content of a specific compound, an electrochemical device including the non-aqueous electrolyte, a lithium ion secondary battery, and a module.
- Non-aqueous electrolytes for electrochemical devices such as lithium ion secondary batteries are generally prepared by dissolving electrolyte salts such as LiPF 6 and LiBF 4 in non-aqueous solvents such as ethylene carbonate, propylene carbonate, and dimethyl carbonate. in use.
- electrolyte salts such as LiPF 6 and LiBF 4
- non-aqueous solvents such as ethylene carbonate, propylene carbonate, and dimethyl carbonate.
- Patent Document 1 discloses that a non-aqueous electrolytic secondary battery using a fluorinated chain carbonate suppresses the generation of gas due to electrolysis and has high safety. However, Patent Document 1 does not describe impurities of the compound. In addition, such a non-aqueous electrolyte secondary battery has a problem that the discharge capacity is lowered when it is left in a high temperature environment or repeatedly charged and discharged.
- An object of this invention is to provide the non-aqueous electrolyte which can obtain the lithium ion secondary battery etc. which were excellent in the storage characteristic in high temperature, and a high voltage cycling characteristic.
- the present invention is a nonaqueous electrolytic solution containing a nonaqueous solvent and an electrolyte salt
- the non-aqueous solvent is represented by the general formula (1): RfOCOOR (1) (Wherein Rf is a fluorinated alkyl group having 1 to 4 carbon atoms, and R is an alkyl group having 1 to 4 carbon atoms), and Containing at least one cyclic carbonate (B) selected from the group consisting of ethylene carbonate, propylene carbonate and fluoroethylene carbonate, and (I) General formula (2): RfOH (2) (Wherein Rf is the same as defined above), (II) General formula (3): ROH (3) Wherein R is the same as defined above, and (III) General formula (4): ROCOCl (4) (Wherein R is as defined above), at least one compound ( ⁇ ) selected from the group consisting of compounds represented by: (IV) General formula (5): HO (CH 2 CH 2 ) n OH (5) Wherein n is an integer of
- the fluorine-containing chain carbonate (A) is preferably CF 3 CH 2 OCOOCH 3 or CF 3 CH 2 OCOOCH 2 CH 3 .
- the content of the fluorine-containing chain carbonate (A) is preferably 0.5 to 90% by weight in the non-aqueous solvent.
- the cyclic carbonate (B) is ethylene carbonate and the compound ( ⁇ ) is a compound represented by the general formula (5). It is preferable that the cyclic carbonate (B) is propylene carbonate and the compound ( ⁇ ) is a compound represented by the general formula (6).
- the cyclic carbonate (B) is fluoroethylene carbonate and the compound ( ⁇ ) is a compound represented by the general formula (7).
- the present invention is also an electrochemical device comprising the non-aqueous electrolyte described above.
- the present invention is also a lithium ion secondary battery comprising a positive electrode, a negative electrode, and the non-aqueous electrolyte described above.
- the present invention is also a module comprising the above-described lithium ion secondary battery.
- the present invention can provide a non-aqueous electrolyte solution capable of obtaining a lithium ion secondary battery and the like excellent in high temperature storage characteristics and high voltage cycle characteristics.
- the non-aqueous electrolyte of the present invention is a non-aqueous electrolyte containing a non-aqueous solvent and an electrolyte salt
- the non-aqueous solvent is represented by the general formula (1): RfOCOOR (1) (Wherein Rf is a fluorinated alkyl group having 1 to 4 carbon atoms, and R is an alkyl group having 1 to 4 carbon atoms), and Containing at least one cyclic carbonate (B) selected from the group consisting of ethylene carbonate, propylene carbonate and fluoroethylene carbonate, and (I) General formula (2): RfOH (2) (Wherein Rf is the same as defined above), (II) General formula (3): ROH (3) Wherein R is the same as defined above, and (III) General formula (4): ROCOCl (4) (Wherein R is as defined above), at least one compound ( ⁇ ) selected from the group consisting of compounds represented by: (IV) General formula (5): HO (CH 2 CH 2 )
- the “fluorinated alkyl group” is a group in which at least one hydrogen atom of an alkyl group is substituted with a fluorine atom.
- the compounds represented by the general formulas (2) to (7) are referred to as the compound (I), the compound (II), the compound (III), the compound (IV), the compound (V), and the compound (VI), respectively. There is also.
- the non-aqueous solvent contains a fluorine-containing chain carbonate (A) represented by the general formula (1).
- Rf is, for example, CF 3 —, CF 3 CF 2 —, (CF 3 ) 2 CH—, CF 3 CH 2 —, C 2 F 5 CH 2 —, HCF 2 CF 2 CH 2 —, CF 3 CFHCF 2 CH 2- and the like can be exemplified, and among these, CF 3 CH 2 -is particularly preferable because it has high flame retardancy and good rate characteristics and oxidation resistance.
- R examples include —CH 3 , —CH 2 CH 3 , —CH (CH 3 ) 2 , —C 3 H 7 and the like.
- —CH 3 , —CH 2 CH 3 has a viscosity of It is particularly preferred from the viewpoint of low and good rate characteristics.
- fluorine-containing chain carbonate (A) examples include, for example, CF 3 CH 2 OCOOCH 3 , CF 3 CH 2 OCOOCH 2 CH 3 , CF 3 CF 2 CH 2 OCOOCH 3 , and CF 3 CF 2 CH 2 OCOOCH 2. CH 3 etc. can be mentioned. Among these, CF 3 CH 2 OCOOCH 3 and CF 3 CH 2 OCOOCH 2 CH 3 are preferable.
- the content of the fluorine-containing chain carbonate (A) is preferably 0.5 to 90% by weight in the non-aqueous solvent.
- the discharge capacity tends to decrease, and the allowable upper limit is 90% by weight.
- the fluorine-containing chain carbonate (A) can exhibit its effect in a relatively small amount.
- a more preferable upper limit value is 70% by weight, and an effective lower limit value is more preferably 10% by weight, still more preferably 20% by weight.
- the non-aqueous solvent further contains at least one compound ( ⁇ ) selected from the group consisting of compound (I), compound (II) and compound (III).
- the fluorine-containing chain carbonate (A) can be usually synthesized by reacting the compound (I) with the compound (III). Therefore, depending on the method of purification, compound (I) and compound (III), which are starting materials, may remain as impurities.
- Compound (II) may also be generated as an impurity when the fluorine-containing chain carbonate represented by the general formula (1) is synthesized.
- Rf in the general formula (1) and the general formula Rf in (2) is the same, and R in general formula (1) is the same as R in general formulas (3) and (4).
- CF 3 CH 2 OCOOCH 3 can usually be synthesized by reacting CF 3 CH 2 OH with CH 3 OCOCl, CF 3 CH 2 OH (compound (I-1)) or CH 3 OCOCl ( Compound (III-1)) may remain as an impurity, and CH 3 OH (compound (II-1)) may also be generated as an impurity.
- CF 3 CH 2 OCOOCH 2 CH 3 can usually be synthesized by reacting CF 3 CH 2 OH with CH 3 CH 2 OCOCl, CF 3 CH 2 OH (compound (I-1)) or CH 3 CH 2 OCOCl (compound (III-2)) may remain as an impurity, and CH 3 CH 2 OH (compound (II-2)) may also be generated as an impurity.
- the content of the compound ( ⁇ ) is 5000 ppm or less, preferably 3500 ppm or less with respect to the fluorine-containing chain carbonate (A). More preferably, it is 2500 ppm or less. More preferably, it is 1000 ppm or less, Most preferably, it is 100 ppm or less, Most preferably, it is 10 ppm or less.
- the compounds (I) to (III) are contained in a total amount of more than 5000 ppm, the discharge characteristics after storage at high temperature tend to be greatly deteriorated.
- the HOMO energy of the compounds (I) to (III) obtained by molecular activation calculation is higher than that of the fluorine-containing chain carbonate (A), the oxidation resistance is weak. Therefore, it is considered that when the voltage is increased, it is decomposed and becomes a cause of deterioration. From this, it is considered that the lower the content of the compounds (I) to (III) in the non-aqueous solvent, the less the deterioration of the storage characteristics of the battery.
- the compound ( ⁇ ) (that is, the compounds (I) to (III)) is an impurity contained in the fluorine-containing chain carbonate (A). Therefore, by purifying the fluorinated chain carbonate (A) in advance, the content of the compound ( ⁇ ) in the non-aqueous solvent (the total content of the compounds (I) to (III)) is within the above range (above the above 5000 ppm or less with respect to the fluorine-containing chain carbonate (A).
- ppm is based on weight
- 5000 ppm or less with respect to the fluorine-containing chain carbonate (A) is 0.5 parts by weight or less with respect to 100 parts by weight of the fluorine-containing chain carbonate (A).
- Examples of the purification method of the fluorine-containing chain carbonate (A) include a rectification method using a distillation column having 10 or more theoretical plates.
- a by-product is generated.
- the fluorine-containing chain carbonate (A) is CF 3 CH 2 OCO 2 CH 3
- the following reaction occurs and a by-product is generated.
- the distillation temperature is preferably 90 ° C. or lower, and more preferably 70 ° C. or lower.
- the non-aqueous solvent contains at least one cyclic carbonate (B) selected from the group consisting of ethylene carbonate, propylene carbonate, and fluoroethylene carbonate.
- B cyclic carbonate
- the content of the cyclic carbonate (B) is preferably 5 to 80% by weight in the non-aqueous solvent.
- the lower limit is more preferably 10% by weight.
- 50 weight% is more preferable, 40 weight% is still more preferable, and 30 weight% is especially preferable.
- the non-aqueous solvent further contains at least one compound ( ⁇ ) selected from the group consisting of compound (IV), compound (V), and compound (VI).
- the compound ( ⁇ ) is a byproduct generated when the cyclic carbonate (B) is synthesized. More specifically, compound (IV) is a by-product during the synthesis of ethylene carbonate, compound (V) is a by-product during the synthesis of propylene carbonate, and compound (VI) is a fluoro-ethylene carbonate synthesis. By-product of time.
- the cyclic carbonate (B) is ethylene carbonate and the compound ( ⁇ ) is a compound represented by (IV) general formula (5). Moreover, it is preferable that the said cyclic carbonate (B) is a propylene carbonate, and the said compound ((beta)) is a compound shown by (V) general formula (6). Moreover, it is preferable that the said cyclic carbonate (B) is a fluoroethylene carbonate, and the said compound ((beta)) is a compound shown by (VI) general formula (7).
- the non-aqueous solvent contains two or more kinds of cyclic carbonates (B), it may contain two or more kinds of compounds ( ⁇ ).
- the compound ( ⁇ ) is an impurity of the cyclic carbonate (B).
- the cyclic carbonate (B) is purified in advance.
- the amount of the compound ( ⁇ ) that is an impurity that is, the compound (IV), the compound (V), the compound (VI)
- the content of the compound ( ⁇ ) is within the range described later. It can be. It does not specifically limit as a purification method of the said cyclic carbonate (B), What is necessary is just a well-known purification method, for example, it is good to perform rectification using the distillation column of 10 or more theoretical plates.
- the content of the compound ( ⁇ ) (that is, the total content of the compound (IV), the compound (V), and the compound (VI)) is 50 ppm or less with respect to the cyclic carbonate (B). It is. For this reason, it is excellent in storage characteristics at high temperatures and high voltage cycle characteristics. When it contains more than 50 ppm, there exists a tendency for the fall of the discharge characteristic after high temperature storage to become large. In addition, 50 ppm or less means here that it is 0.005 mass part or less with respect to 100 mass parts of cyclic carbonate (B).
- compounds (IV) to (VI) are as follows: compound (IV) is based on ethylene carbonate, compound (V) is based on propylene carbonate, and compound (VI) is based on fluoroethylene carbonate. It is preferable that
- the non-aqueous solvent may contain other components.
- any known components can be used as the solvent for the non-aqueous electrolyte secondary battery.
- alkylene carbonates such as butylene carbonate and 4,5-difluoroethylene carbonate
- dialkyl carbonates such as dimethyl carbonate, diethyl carbonate, di-n-propyl carbonate, and ethyl methyl carbonate (alkyl groups having 1 to 4 carbon atoms are preferred
- Cyclic ethers such as tetrahydrofuran and 2-methyltetrahydrofuran
- chain ethers such as dimethoxyethane and dimethoxymethane
- cyclic carboxylic acid ester compounds such as ⁇ -butyrolactone and ⁇ -valerolactone
- chain carboxylic acid esters Two or more of these may be used in combination.
- dialkyl carbonate having an alkyl group having 1 to 4 carbon atoms examples include dimethyl carbonate, diethyl carbonate, di-n-propyl carbonate, ethyl methyl carbonate, methyl-n-propyl carbonate, and ethyl-n-propyl carbonate. It is done. Among these, dimethyl carbonate, diethyl carbonate, or ethyl methyl carbonate is preferable.
- Still another example of a preferable non-aqueous solvent includes a phosphorus-containing organic solvent.
- the phosphorus-containing organic solvent include trimethyl phosphate, triethyl phosphate, dimethyl ethyl phosphate, methyl diethyl phosphate, ethylene methyl phosphate, and ethylene ethyl phosphate.
- the phosphorus-containing organic solvent is contained in the nonaqueous solvent so as to be 10% by volume or more, the flammability of the electrolytic solution can be reduced.
- the content of the phosphorus-containing organic solvent is 10 to 80% by volume, and the other components are mainly dissolved in a non-aqueous solvent selected from ⁇ -butyrolactone, ⁇ -valerolactone, alkylene carbonate, and dialkyl carbonate. Therefore, the balance between the cycle characteristics and the large current discharge characteristics is improved.
- the cyclic carbonate having a carbon-carbon unsaturated bond in the molecule is preferably contained in a non-aqueous solvent in an amount of 8% by weight or less, more preferably 0.01 to 8% by weight.
- a non-aqueous solvent in an amount of 8% by weight or less, more preferably 0.01 to 8% by weight.
- side reactions at the negative electrode of the fluorine-containing chain carbonate (A) can be suppressed, and the storage characteristics and the cycle characteristics of the battery can be further improved, which is preferable.
- the amount of cyclic carbonate added exceeds 8% by weight, battery characteristics after storage may be deteriorated.
- the lower limit is preferably 0.1% by weight and the upper limit is preferably 3% by weight.
- Examples of the cyclic carbonate having a carbon-carbon unsaturated bond in the molecule include vinylene carbonate, methyl vinylene carbonate, ethyl vinylene carbonate, 4,5-dimethyl vinylene carbonate, 4,5-diethyl vinylene carbonate, fluoro vinylene carbonate, trifluoro Vinylene carbonate compounds such as methyl vinylene carbonate; 4-vinylethylene carbonate, 4-methyl-4-vinylethylene carbonate, 4-ethyl-4-vinylethylene carbonate, 4-n-propyl-4-vinylene ethylene carbonate, 5-methyl -4-vinylethylene carbonate, 4,4-divinylethylene carbonate, 4,5-divinylethylene carbonate, 4,4-dimethyl-5-methyleneethylene carbonate, 4,4 Vinyl ethylene carbonate compounds such as diethyl 5-methylene-ethylene carbonate.
- vinylene carbonate 4-vinylethylene carbonate, 4-methyl-4-vinylethylene carbonate or 4,5-divinylethylene carbonate, particularly vinylene carbonate or 4-vinylethylene carbonate are preferred. Two or more of these may be used in combination.
- the non-aqueous solvent used in the present invention includes the general formula (8): Rf 1 -O-Rf 2 (8) (Wherein Rf 1 and Rf 2 are the same or different and are an alkyl group having 1 to 10 carbon atoms or a fluorinated alkyl group having 1 to 10 carbon atoms; provided that at least one is a fluorinated alkyl group) Ethers can be included.
- Rf 1 and Rf 2 are the same or different and are an alkyl group having 1 to 10 carbon atoms or a fluorinated alkyl group having 1 to 10 carbon atoms; provided that at least one is a fluorinated alkyl group
- Ethers can be included.
- the compounds represented by the following (I ′) and (II ′), which are impurities of the fluorine-containing ether, are preferably contained in a total amount of 5000 ppm or less with respect to the fluorine-containing ether.
- II ′) General formula (9): Rf 1 OH (9) (Wherein Rf 1 is the same as above)
- a hydroxyl group-containing compound represented by formula hereinafter also referred to as compound (II ′)).
- fluorine-containing ether represented by the general formula (8) include, for example, HCF 2 CF 2 CH 2 OCF 2 CF 2 H, CF 3 CF 2 CH 2 OCF 2 CF 2 H, and HCF 2 CF 2 CH 2.
- oxidation resistance and, from the viewpoint of compatibility with an electrolyte salt such as LiPF 6, HCF 2 CF 2 CH 2 OCF 2 CF 2 H, and consists of HCF 2 CF 2 CH 2 OCF 2 CFHCF 3
- an electrolyte salt such as LiPF 6, HCF 2 CF 2 CH 2 OCF 2 CF 2 H, and consists of HCF 2 CF 2 CH 2 OCF 2 CFHCF 3
- One or more compounds selected from the group are preferable, and HCF 2 CF 2 CH 2 OCF 2 CF 2 H is more preferable.
- the content of the fluorinated ether represented by the general formula (8) is preferably 40% by weight or less, more preferably 3 to 40% by weight in the non-aqueous solvent.
- the fluorine-containing unsaturated compound (I ′) is derived from a by-product generated when the fluorine-containing ether represented by the general formula (8) is synthesized. Specifically, hydrogen fluoride (HF) is eliminated from the fluorine-containing ether represented by the general formula (8) and an unsaturated bond is generated.
- HF hydrogen fluoride
- Rf 1 OH 9
- examples of Rf 1 include the same as those in the general formula (8), and specific examples include (II′-1) HCF 2 CF 2 CH 2 OH.
- Compounds (I ′) and (II ′) are impurities contained in the fluorine-containing ether. Therefore, when the fluorine-containing ether represented by the general formula (8) is used, the content of the compounds (I ′) and (II ′) in the non-aqueous solvent can be reduced by purifying the fluorine-containing ether in advance. It can be in the above-mentioned range (a total of 5000 ppm or less with respect to the fluorine-containing ether).
- ppm is based on weight
- 5000 ppm or less with respect to the fluorinated ether indicates 0.5 parts by weight or less with respect to 100 parts by weight of the fluorinated ether.
- compound (I ') and (II') As an upper limit of content of compound (I ') and (II'), it is preferable that it is 3500 ppm or less in total with respect to the said fluorine-containing ether, and it is more preferable that it is 2000 ppm or less.
- the total amount of the compounds (I ′) and (II ′) is more than 5000 ppm, there is a tendency that the discharge characteristics after high-temperature storage are deteriorated and the cycle deterioration is increased when the voltage is increased.
- the compounds (I ′) and (II ′) particularly when Rf 1 OH (compound (II ′)) remains, it easily reacts with Li, so that the capacity tends to decrease.
- the fluorine-containing unsaturated compound (I ′) has a double bond, when many of these remain, there is a tendency that they easily react with moisture and the like in the electrolytic solution and decompose.
- nonaqueous solvent may contain other useful compounds, for example, conventionally known additives, dehydrating agents, deoxidizing agents, and overcharge preventing agents as required.
- Additives include carbonate compounds such as fluoroethylene carbonate, trifluoropropylene carbonate, phenylethylene carbonate, and erythritan carbonate; succinic anhydride, glutaric anhydride, maleic anhydride, citraconic anhydride, glutaconic anhydride, itaconic anhydride Carboxylic anhydrides such as acid, diglycolic anhydride, cyclohexanedicarboxylic anhydride, cyclopentanetetracarboxylic dianhydride, and phenylsuccinic anhydride; ethylene sulfite, 1,3-propane sultone, 1,4 -Sulfur-containing compounds such as butane sultone, methyl methanesulfonate, busulfan, sulfolane, sulfolene, dimethyl sulfone, and tetramethylthiuram monosulfide; 1-methyl-2-pyrrolidinone, 1-methyl-2
- aromatic compounds such as cyclohexylbenzene, biphenyl, alkylbiphenyl, terphenyl, terphenyl partial hydride, t-butylbenzene, t-amylbenzene, diphenyl ether, benzofuran and dibenzofuran;
- aromatic compounds such as cyclohexylbenzene, biphenyl, alkylbiphenyl, terphenyl, terphenyl partial hydride, t-butylbenzene, t-amylbenzene, diphenyl ether, benzofuran and dibenzofuran;
- partially fluorinated products of the above aromatic compounds such as fluorobiphenyl; fluorine-containing anisole compounds such as 2,4-difluoroanisole, 2,5-difluoroanisole, and 2,6-difluoroanisole.
- any salt can be used, but a lithium salt is preferable.
- the lithium salt include inorganic lithium salts such as LiClO 4 , LiPF 6 , and LiBF 4 ; LiCF 3 SO 3 , LiN (CF 3 SO 2 ) 2 , LiN (C 2 F 5 SO 2 ) 2 , LiN ( CF 3 SO 2 ) (C 4 F 9 SO 2 ), LiC (CF 3 SO 2 ) 3 , LiPF 4 (CF 3 ) 2 , LiPF 4 (C 2 F 5 ) 2 , LiPF 4 (CF 3 SO 2 ) 2 LiPF 4 (C 2 F 5 SO 2 ) 2 , LiBF 2 (CF 3 ) 2 , LiBF 2 (C 2 F 5 ) 2 , LiBF 2 (CF 3 SO 2 ) 2 , and LiBF 2 (C 2 F 5 Fluorine-containing organic acid lithium salts such as SO 2 ) 2 and the like can be mentioned, and these can be used alone or in combination of two
- LiPF 6 , LiBF 4 , LiCF 3 SO 3 , LiN (CF 3 SO 2 ) 2 and LiN (C 2 F 5 SO 2 ) 2 are preferable, and LiPF 6 and LiBF 4 are more preferable.
- inorganic lithium salts such as LiPF 6 and LiBF 4 and fluorine-containing organic lithium salts such as LiCF 3 SO 3 , LiN (CF 3 SO 2 ) 2 and LiN (C 2 F 5 SO 2 ) 2 are used in combination, This is preferable because deterioration after storage at high temperature is reduced.
- the electrolyte salt concentration in the non-aqueous electrolyte of the present invention is preferably 0.5 to 3 mol / liter. Outside this range, the electrical conductivity of the electrolytic solution tends to be low, and the battery performance tends to deteriorate.
- the non-aqueous electrolyte of the present invention has a specific compound content of a certain level or less. For this reason, the electrochemical device using the non-aqueous electrolyte of the present invention is excellent in storage characteristics at high temperatures and high voltage cycle characteristics.
- the electrochemical device provided with such a non-aqueous electrolyte of the present invention is also one aspect of the present invention.
- Examples of the electrochemical device using the nonaqueous electrolytic solution of the present invention include a lithium ion secondary battery and an electric double layer capacitor.
- the configuration of the lithium ion secondary battery will be described.
- the lithium ion secondary battery including the negative electrode, the positive electrode, and the above-described nonaqueous electrolytic solution of the present invention is also one aspect of the present invention.
- a carbonaceous material capable of occluding and releasing lithium such as a pyrolyzate of organic matter under various pyrolysis conditions, artificial graphite, and natural graphite; tin oxide, silicon oxide, etc.
- Metal oxide materials capable of inserting and extracting lithium; lithium metal; various lithium alloys and the like can be used. Two or more of these negative electrode materials may be mixed and used.
- Carbonaceous materials that can occlude and release lithium include artificial graphite or purified natural graphite produced by high-temperature treatment of graphitizable pitch obtained from various raw materials, or surface treatment of these graphite with pitch or other organic substances. Those obtained by carbonization after application are preferred.
- the negative electrode may be manufactured by a conventional method. For example, a method of adding a binder, a thickener, a conductive material, a solvent, and the like to the negative electrode material to form a slurry, applying the slurry to the current collector, drying, and pressing to increase the density can be given.
- any material can be used as long as it is a material that is safe with respect to the solvent and the electrolyte used in manufacturing the electrode.
- examples thereof include polyvinylidene fluoride, polytetrafluoroethylene, polyethylene, polypropylene, styrene / butadiene rubber, isoprene rubber, butadiene rubber, ethylene-acrylic acid copolymer, and ethylene-methacrylic acid copolymer.
- thickener examples include carboxymethyl cellulose, methyl cellulose, hydroxymethyl cellulose, ethyl cellulose, polyvinyl alcohol, oxidized starch, phosphorylated starch, and casein.
- Examples of the conductive material include metal materials such as copper and nickel; carbon materials such as graphite and carbon black.
- Examples of the material for the negative electrode current collector include copper, nickel, and stainless steel. Among these, copper is preferable from the viewpoint of easy processing into a thin film and cost.
- the positive electrode material constituting the lithium ion secondary battery is particularly preferably a positive electrode active material of a lithium-containing transition metal composite oxide that produces a high voltage.
- a positive electrode active material of a lithium-containing transition metal composite oxide that produces a high voltage.
- LiCoO 2 , LiMnO 2 , LiNiO 2 , LiMn 2 O 4 , LiNi 0.8 Co 0.15 Al 0.05 O 2 , or LiNi 1/3 Co 1/3 Mn 1/3 O 2 is preferable because it has a high energy density and can provide a high-power lithium ion secondary battery.
- positive electrode actives such as LiFePO 4 , LiNi 0.8 Co 0.2 O 2 , Li 1.2 Fe 0.4 Mn 0.4 O 2 , LiNi 0.5 Mn 0.5 O 2 , LiV 3 O 6, etc. It may be a substance.
- the blending amount of the positive electrode active material is preferably 50 to 99% by mass, more preferably 80 to 99% by mass of the positive electrode mixture, from the viewpoint of high battery capacity.
- the particles of the positive electrode active material mainly consist of secondary particles, and the secondary particles. It is preferable to contain 0.5 to 7.0% by volume of fine particles having an average particle size of 40 ⁇ m or less and an average primary particle size of 1 ⁇ m or less. By containing fine particles having an average primary particle diameter of 1 ⁇ m or less, the contact area with the electrolytic solution is increased, and the diffusion of lithium ions between the electrode and the electrolytic solution can be accelerated, and the output performance can be improved. .
- the positive electrode may be manufactured by a conventional method. For example, a method of adding a binder, a thickener, a conductive material, a solvent, and the like to the positive electrode material to form a slurry, applying the slurry to the current collector, drying, and pressing to increase the density can be given.
- the binder for the positive electrode the same one as that for the negative electrode can be used, and any material can be used as long as it is a safe material for the solvent and the electrolytic solution used in manufacturing the electrode.
- any material include polyvinylidene fluoride, polytetrafluoroethylene, polyethylene, polypropylene, styrene / butadiene rubber, isoprene rubber, butadiene rubber, ethylene-acrylic acid copolymer, and ethylene-methacrylic acid copolymer.
- the thing similar to a negative electrode can be used also about the thickener of a positive electrode, and carboxymethylcellulose, methylcellulose, hydroxymethylcellulose, ethylcellulose, polyvinyl alcohol, an oxidized starch, a phosphorylated starch, casein, etc. are mentioned.
- Examples of the conductive material include carbon materials such as graphite and carbon black.
- Examples of the material for the positive electrode current collector include metals such as aluminum, titanium, and tantalum, and alloys thereof. Of these, aluminum or an alloy thereof is preferable.
- the material and shape of the separator used for the lithium ion secondary battery are arbitrary as long as they are stable in the non-aqueous electrolyte and excellent in liquid retention.
- a porous sheet or non-woven fabric made of a polyolefin such as polyethylene or polypropylene is preferred. Specific examples include a microporous polyethylene film, a microporous polypropylene film, a microporous ethylene-propylene copolymer film, a microporous polypropylene / polyethylene two-layer film, and a microporous polypropylene / polyethylene / polypropylene three-layer film. It is done.
- the shape of the battery is arbitrary, and examples thereof include a cylindrical shape, a square shape, a laminate shape, a coin shape, and a large size.
- the shape and structure of a positive electrode, a negative electrode, and a separator can be changed and used according to the shape of each battery.
- a module comprising a lithium ion secondary battery using the non-aqueous electrolyte of the present invention is also one aspect of the present invention.
- Synthesis Example 1 Synthesis Method of CF 3 CH 2 OCO 2 CH 3
- a reaction tube was prepared by installing a reflux tube and a dropping funnel in a 10 L four-necked flask. Thereafter, CF 3 CH 2 OH (750 g; 7.5 mol), methyl chloroformate (708.8 g; 7.5 mol) and diglyme (700 mL) as a solvent were added and stirred in an ice bath. Thereafter, using a dropping funnel, triethylamine (758.3 g; 7.5 mol) was added while paying attention to heat generation. Gradually, triethylamine hydrochloride precipitated and the reaction solution turned milky white. After completion of the reaction, the reaction solution was washed with 1N HCl aqueous solution.
- Rectification A to C were gas chromatographed (manufactured by Shimadzu Corporation, GC-17A; column: DB624 (Length 60 m, ID 0.32 mm, Film 1.8 ⁇ m); raised from 50 ° C. to 250 ° C. at 10 ° C./min. Temperature; both the injection and detector (FID) are 250 ° C.), and the purity of CF 3 CH 2 OCO 2 CH 3 and the CF of compounds (I-1), (II-1), (III-1) The content with respect to 3 CH 2 OCO 2 CH 3 was determined. The results are shown in Table 1.
- Synthesis Example 2 Synthesis Method of CF 3 CH 2 OCO 2 C 2 H 5
- a 10 L 4-neck flask was equipped with a reflux tube and a dropping funnel to prepare a reaction apparatus. Thereafter, CF 3 CH 2 OH (750 g; 7.5 mol), ethyl chloroformate (813.3 g; 7.5 mol) and diglyme (1250 mL) as a solvent were added and stirred in an ice bath. Thereafter, using a dropping funnel, triethylamine (758.3 g; 7.5 mol) was added while paying attention to heat generation. Gradually, triethylamine hydrochloride precipitated and the reaction solution turned milky white. After completion of the reaction, the reaction solution was washed with 1N HCl aqueous solution.
- Rectification DF was gas chromatographed (manufactured by Shimadzu Corporation, GC-17A; column: DB624 (Length 60 m, ID 0.32 mm, Film 1.8 ⁇ m); increased from 50 ° C. to 250 ° C. at 10 ° C./min.
- the temperature of the CF 3 CH 2 OCO 2 C 2 H 5 and the compounds (I-1), (II-2), (III-2) Of CF 3 CH 2 OCO 2 C 2 H 5 was determined. The results are shown in Table 2.
- Synthesis Example 3 Synthesis Method of CF 3 CH 2 OCO 2 CH 3
- a 10 L 4-necked flask was equipped with a reflux tube and a dropping funnel to prepare a reaction apparatus. Thereafter, CF 3 CH 2 OH (750 g; 7.5 mol), methyl chloroformate (708.8 g; 7.5 mol) and diglyme (700 mL) as a solvent were added and stirred in an ice bath. Thereafter, using a dropping funnel, triethylamine (758.3 g; 7.5 mol) was added while paying attention to heat generation. Gradually, triethylamine hydrochloride precipitated and the reaction solution turned milky white. After completion of the reaction, the reaction solution was washed with 1N HCl aqueous solution.
- the organic layer separated after washing was rectified using a 10-stage distillation purification tower.
- the rectification was performed at an external temperature of 110 ° C. under reduced pressure (0.03 MPa) using a vacuum pump.
- CF 3 CH 2 OH compound (I-1)
- CH 3 OH compound (II-1)
- CH 3 Rectification G H, I, J, K, L, and M having different contents of OCOCl (compound (III-1)
- Rectification G to M were gas chromatographed (manufactured by Shimadzu Corporation, GC-17A; column: DB624 (Length 60 m, ID 0.32 mm, Film 1.8 ⁇ m); raised from 50 ° C. to 250 ° C. at 10 ° C./min. Temperature; both the injection and detector (FID) are 250 ° C.), and the purity of CF 3 CH 2 OCO 2 CH 3 and the CF of compounds (I-1), (II-1), (III-1) The content with respect to 3 CH 2 OCO 2 CH 3 was determined. The results are shown in Table 3.
- Example 1 Under a dry argon atmosphere, 97 parts by weight of a mixture of ethylene carbonate and ethyl methyl carbonate containing 20 ppm of HOCH 2 CH 2 OH (volume ratio 3: 7), 3 parts by weight of CF 3 CH 2 OCO 2 CH 3 of rectified C Then, fully dried LiPF 6 was dissolved at a rate of 1 mol / liter to obtain an electrolytic solution.
- Positive electrode active in which LiNi 1/3 Mn 1/3 Co 1/3 O 2 , carbon black, and polyvinylidene fluoride (trade name KF-7200, manufactured by Kureha Co., Ltd.) were mixed at 92/3/5 (mass% ratio).
- a positive electrode mixture slurry was prepared by dispersing the substance in N-methyl-2-pyrrolidone to form a slurry.
- the obtained positive electrode mixture slurry is uniformly applied on an aluminum current collector, dried to form a positive electrode mixture layer (thickness 50 ⁇ m), and then compression molded by a roller press machine to form a positive electrode laminate.
- Manufactured The positive electrode laminate was punched into a diameter of 1.6 mm with a punching machine to produce a circular positive electrode.
- a negative electrode current collector (thickness 10 ⁇ m) was prepared by adding styrene-butadiene rubber dispersed in distilled water to artificial graphite powder to a solid content of 6% by mass and mixing with a disperser to form a slurry. On the copper foil) and dried to form a negative electrode mixture layer, followed by compression molding with a roller press machine, and punched into a diameter of 1.6 mm with a punching machine to produce a circular negative electrode did.
- the above-mentioned circular positive electrode is opposed to the positive electrode and the negative electrode through a microporous polyethylene film (separator) having a thickness of 20 ⁇ m, the electrolytic solution is injected, and the electrolytic solution sufficiently permeates the separator and the like and then sealed. Precharging and aging were performed to produce a coin-type lithium ion secondary battery.
- the coin-type lithium ion secondary battery was examined for high voltage cycle characteristics and high temperature storage characteristics as follows.
- Example 2 A battery was fabricated and tested in the same manner as in Example 1 except that CF 3 CH 2 OCO 2 CH 3 of rectification B was used instead of CF 3 CH 2 OCO 2 CH 3 of rectification C in Example 1. went. The results are shown in Table 4.
- Example 3 A battery was prepared in the same manner as in Example 1 except that CF 3 CH 2 OCO 2 C 2 H 5 of rectification F was used instead of CF 3 CH 2 OCO 2 CH 3 of rectification C in Example 1. A test was conducted. The results are shown in Table 4.
- Example 4 A battery was prepared in the same manner as in Example 1 except that CF 3 CH 2 OCO 2 C 2 H 5 of rectification E was used instead of CF 3 CH 2 OCO 2 CH 3 of rectification C in Example 1. A test was conducted. The results are shown in Table 4.
- Example 5 A battery was prepared and tested in the same manner as in Example 1 except that CF 3 CH 2 OCO 2 CH 3 of rectification I was used instead of CF 3 CH 2 OCO 2 CH 3 of rectification C in Example 1. went. The results are shown in Table 4.
- Example 6 A battery was prepared and tested in the same manner as in Example 1 except that CF 3 CH 2 OCO 2 CH 3 of rectification J was used instead of CF 3 CH 2 OCO 2 CH 3 of rectification C in Example 1. went. The results are shown in Table 4.
- Example 7 A battery was fabricated and tested in the same manner as in Example 1 except that CF 3 CH 2 OCO 2 CH 3 of rectified K was used instead of CF 3 CH 2 OCO 2 CH 3 of rectified C in Example 1. went. The results are shown in Table 4.
- Example 8 A battery was fabricated and tested in the same manner as in Example 1 except that CF 3 CH 2 OCO 2 CH 3 of rectified L was used instead of CF 3 CH 2 OCO 2 CH 3 of rectified C in Example 1. went. The results are shown in Table 4.
- Example 9 A battery was prepared and tested in the same manner as in Example 1 except that CF 3 CH 2 OCO 2 CH 3 of rectified M was used instead of CF 3 CH 2 OCO 2 CH 3 of rectified C in Example 1. went. The results are shown in Table 4.
- Comparative Example 1 A battery was prepared and tested in the same manner as in Example 1 except that CF 3 CH 2 OCO 2 CH 3 of rectification A was used instead of CF 3 CH 2 OCO 2 CH 3 of rectification C in Example 1. went. The results are shown in Table 4.
- Example 2 In Example 1, instead of CF 3 CH 2 OCO 2 CH 3 of rectified C, CF 3 CH 2 OCO 2 CH 3 of rectified C added with compound (I-1) at a ratio of 10,000 ppm was used. A battery was prepared and tested in the same manner as in Example 1 except for the above. The results are shown in Table 4.
- Comparative Example 5 Instead of CF 3 CH 2 OCO 2 CH 3 fractionator C in Example 1, except that the CF 3 CH 2 OCO 2 C 2 H 5 rectification D is A battery was produced in the same manner as in Example 1 Test Went. The results are shown in Table 4.
- Comparative Example 6 A battery was prepared and tested in the same manner as in Example 1 except that CF 3 CH 2 OCO 2 C 2 H 5 of rectified G was used instead of CF 3 CH 2 OCO 2 CH 3 of rectified C in Example 1. Went. The results are shown in Table 4.
- Comparative Example 7 A battery was prepared and tested in the same manner as in Example 1 except that CF 3 CH 2 OCO 2 C 2 H 5 of rectified H was used instead of CF 3 CH 2 OCO 2 CH 3 of rectified C in Example 1. Went. The results are shown in Table 4.
- Example 8 In Example 1, instead of CF 3 CH 2 OCO 2 CH 3 of rectified C, CF 3 CH 2 OCO 2 C 2 H 5 of rectified F was added with Compound (I-1) at a ratio of 10,000 ppm. A battery was prepared and tested in the same manner as in Example 1 except that it was used. The results are shown in Table 4.
- Example 9 In Example 1, instead of CF 3 CH 2 OCO 2 CH 3 of rectified C, CF 3 CH 2 OCO 2 C 2 H 5 of rectified F was added with Compound (II-2) at a ratio of 10,000 ppm. A battery was prepared and tested in the same manner as in Example 1 except that it was used. The results are shown in Table 4.
- Example 10 In Example 1, instead of CF 3 CH 2 OCO 2 CH 3 of rectified C, CF 3 CH 2 OCO 2 C 2 H 5 of rectified F was added with Compound (III-2) at a ratio of 10,000 ppm. A battery was prepared and tested in the same manner as in Example 1 except that it was used. The results are shown in Table 4.
- Example 10 Under a dry argon atmosphere, a mixture of propylene carbonate containing 20 ppm HOCHCH 3 CH 2 OH, ethylene carbonate containing 10 ppm HOCH 2 CH 2 OH and ethyl methyl carbonate (volume ratio 1: 2: 7) in 97 parts by weight of HCF 2 parts by weight of 2 CF 2 CH 2 OCF 2 CF 2 H rectified liquid C was added, and then sufficiently dried LiPF 6 was dissolved at a ratio of 1 mol / liter to obtain an electrolyte solution. A battery was prepared and tested in the same manner as described above. The results are shown in Table 5.
- Example 11 Under a dry argon atmosphere, 97 parts by weight of a mixture of fluoroethylene carbonate containing 10 ppm HOCHFCH 2 OH, ethylene carbonate containing 10 ppm HOCH 2 CH 2 OH and ethyl methyl carbonate (volume ratio 1: 2: 7) was added to HCF 2 3 parts by weight of rectified liquid C of CF 2 CH 2 OCF 2 CF 2 H was added, and then sufficiently dried LiPF 6 was dissolved at a ratio of 1 mol / liter to obtain an electrolyte solution. Similarly, a battery was prepared and tested. The results are shown in Table 5.
- Comparative Example 11 In a dry argon atmosphere, 97 parts by weight of a mixture of ethylene carbonate and ethyl methyl carbonate (volume ratio 3: 7) containing 70 ppm of HOCH 2 CH 2 OH was added to a rectified liquid C 3 weight of CF 3 CH 2 OCO 2 CH 3 Next, LiPF 6 that was sufficiently dried was dissolved to a ratio of 1 mol / liter to obtain an electrolytic solution, and a battery was prepared and tested in the same manner as in Example 1. The results are shown in Table 5.
- Comparative Example 12 An electrolyte solution was prepared in the same manner as in Example 10 except that propylene carbonate containing 50 ppm HOCHCH 3 CH 2 OH was used instead of propylene carbonate containing 20 ppm HOCHCH 3 CH 2 OH of Example 10. Fabricated and tested. The results are shown in Table 5.
- Comparative Example 13 A battery was produced and tested in the same manner as in Example 11 except that fluoroethylene carbonate containing 50 ppm of HOCHFCH 2 OH was used instead of fluoroethylene carbonate containing 10 ppm of HOCHFCH 2 OH of Example 11. The results are shown in Table 5.
- the nonaqueous electrolytic solution of the present invention can be suitably used for an electric device such as a lithium ion secondary battery.
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Abstract
Description
上記非水溶媒が、一般式(1):
RfOCOOR (1)
(式中、Rfは炭素数1~4のフッ素化アルキル基であり、Rは炭素数1~4のアルキル基である)で示される含フッ素鎖状カーボネート(A)、並びに、
エチレンカーボネート、プロピレンカーボネート及びフルオロエチレンカーボネートからなる群より選択される少なくとも1種の環状カーボネート(B)を含有し、かつ、
(I)一般式(2):
RfOH (2)
(式中、Rfは前記同様である)で示される化合物、
(II)一般式(3):
ROH (3)
(式中、Rは前記同様である)で示される化合物、及び、
(III)一般式(4):
ROCOCl (4)
(式中、Rは前記同様である)で示される化合物からなる群より選択される少なくとも1種の化合物(α);並びに、
(IV)一般式(5):
HO(CH2CH2)nOH (5)
(式中、nは1~5の整数である)で示される化合物、
(V)一般式(6):
HO(CHCH3CH2)nOH (6)
(式中、nは1~5の整数である)で示される化合物、及び、
(VI)一般式(7):
HO(CHFCH2)nOH (7)
(式中、nは1~5の整数である)で示される化合物からなる群より選択される少なくとも1種の化合物(β)を含有し、
上記化合物(α)の含有量が含フッ素鎖状カーボネート(A)に対して5000ppm以下であり、上記化合物(β)の含有量が環状カーボネート(B)に対して50ppm以下であることを特徴とする非水電解液である。
上記含フッ素鎖状カーボネート(A)が、CF3CH2OCOOCH3、又は、CF3CH2OCOOCH2CH3であることが好ましい。
上記含フッ素鎖状カーボネート(A)の含有量が、非水溶媒中0.5~90重量%であることが好ましい。
上記環状カーボネート(B)が、エチレンカーボネートであり、化合物(β)が、一般式(5)で示される化合物であることが好ましい。
上記環状カーボネート(B)が、プロピレンカーボネートであり、化合物(β)が、一般式(6)で示される化合物であることが好ましい。
上記環状カーボネート(B)が、フルオロエチレンカーボネートであり、化合物(β)が、一般式(7)で示される化合物であることが好ましい。
本発明はまた、上述の非水電解液を備えることを特徴とする電気化学デバイスでもある。
本発明はまた、正極、負極、及び、上述の非水電解液を備えることを特徴とするリチウムイオン二次電池でもある。
本発明はまた、上述のリチウムイオン二次電池を備えることを特徴とするモジュールでもある。
上記非水溶媒が、一般式(1):
RfOCOOR (1)
(式中、Rfは炭素数1~4のフッ素化アルキル基であり、Rは炭素数1~4のアルキル基である)で示される含フッ素鎖状カーボネート(A)、並びに、
エチレンカーボネート、プロピレンカーボネート及びフルオロエチレンカーボネートからなる群より選択される少なくとも1種の環状カーボネート(B)を含有し、かつ、
(I)一般式(2):
RfOH (2)
(式中、Rfは前記同様である)で示される化合物、
(II)一般式(3):
ROH (3)
(式中、Rは前記同様である)で示される化合物、及び、
(III)一般式(4):
ROCOCl (4)
(式中、Rは前記同様である)で示される化合物からなる群より選択される少なくとも1種の化合物(α);並びに、
(IV)一般式(5):
HO(CH2CH2)nOH (5)
(式中、nは1~5の整数である)で示される化合物、
(V)一般式(6):
HO(CHCH3CH2)nOH (6)
(式中、nは1~5の整数である)で示される化合物、及び、
(VI)一般式(7):
HO(CHFCH2)nOH (7)
(式中、nは1~5の整数である)で示される化合物からなる群より選択される少なくとも1種の化合物(β)を含有し、
上記化合物(α)の含有量が含フッ素鎖状カーボネート(A)に対して5000ppm以下であり、上記化合物(β)の含有量が環状カーボネート(B)に対して50ppm以下であることを特徴とする。
このため、本発明の電解液を用いて、高容量で、保存特性、負荷特性およびサイクル特性に優れる電気化学デバイスが得られる。
なお、本発明において「フッ素化アルキル基」は、アルキル基の少なくとも1つの水素原子がフッ素原子に置換された基である。
Rfは、例えば、CF3-、CF3CF2-、(CF3)2CH-、CF3CH2-、C2F5CH2-、HCF2CF2CH2-、CF3CFHCF2CH2-等が例示でき、これらの中でも、CF3CH2-が、難燃性が高く、レート特性や耐酸化性が良好な点から特に好ましい。
上記含フッ素鎖状カーボネート(A)は、通常、化合物(I)と化合物(III)とを反応させることにより合成することができる。そのため、精製の仕方によっては原料物質である、化合物(I)や化合物(III)が不純物として残ることがある。また、化合物(II)も一般式(1)で示される含フッ素鎖状カーボネートを合成する際に不純物として発生することがある。このように、化合物(I)~(III)は、一般式(1)で示される含フッ素鎖状カーボネートの合成の際に生じる不純物であるため、一般式(1)中のRfと、一般式(2)のRfとは同じものになり、かつ、一般式(1)中のRと、一般式(3)、(4)のRとは同じものになる。
上記含フッ素鎖状カーボネート(A)の精製において、高温で蒸留を行うと、副生成物が発生する。例えば、上記含フッ素鎖状カーボネート(A)が、CF3CH2OCO2CH3の場合、以下の反応が起こり、副生成物が発生する。
CF3CH2OCO2CH3 → CF3CH2OCO2CH2CF3
+
CH3OCO2CH3
上記含フッ素鎖状カーボネート(A)の蒸留を減圧下で行うことにより、低温で蒸留を行うことができ、このような副生成物の発生をより抑制することができる。
この場合、蒸留の温度は、90℃以下が好ましく、70℃以下がより好ましい。
より具体的には、化合物(IV)は、エチレンカーボネート合成時の副生成物であり、化合物(V)は、プロピレンカーボネート合成時の副生成物であり、化合物(VI)は、フルオロエチレンカーボネート合成時の副生成物である。
また、上記環状カーボネート(B)が、プロピレンカーボネートであり、上記化合物(β)が、(V)一般式(6)で示される化合物であることが好ましい。
また、上記環状カーボネート(B)が、フルオロエチレンカーボネートであり、上記化合物(β)が、(VI)一般式(7)で示される化合物であることが好ましい。
上記非水溶媒が、2種以上の環状カーボネート(B)を含む場合、2種以上の化合物(β)を含んでいてもよい。
上記環状カーボネート(B)の精製方法としては、特に限定されず、公知の精製方法であればよく、例えば、理論段数10段以上の蒸留塔を用いて精留するとよい。
50ppmより多く含有すると、高温保存後の放電特性の低下が大きくなる傾向がある。なお、ここで、50ppm以下とは、環状カーボネート(B)100質量部に対して、0.005質量部以下であることを示す。
上記化合物(β)の含有量は、環状カーボネート(B)に対して30ppm以下が好ましく、20ppm以下がより好ましい。
また、化合物(IV)~(VI)の含有量は、それぞれ、化合物(IV)はエチレンカーボネートに対して、化合物(V)はプロピレンカーボネートに対して、化合物(VI)はフルオロエチレンカーボネートに対してであることが好ましい。
非水溶媒のその他の成分としては、非水系電解液二次電池の溶媒として公知の任意のものを用いることができる。例えば、ブチレンカーボネート、4,5-ジフルオロエチレンカーボネート等のアルキレンカーボネート;ジメチルカーボネート、ジエチルカーボネート、ジ-n-プロピルカーボネート、エチルメチルカーボネート等のジアルキルカーボネート(炭素数1~4のアルキル基が好ましい);テトラヒドロフラン、2-メチルテトラヒドロフラン等の環状エーテル;ジメトキシエタン、ジメトキシメタン等の鎖状エーテル;γ-ブチロラクトン、γ-バレロラクトン等の環状カルボン酸エステル化合物;酢酸メチル、プロピオン酸メチル、プロピオン酸エチル等の鎖状カルボン酸エステル等が挙げられる。これらは2種類以上を併用してもよい。なかでも、上記非水溶媒は、ジアルキルカーボネートを含むことが好ましい。
Rf1-O-Rf2 (8)
(式中、Rf1及びRf2は同じかまたは異なり、炭素数1~10のアルキル基または炭素数1~10のフッ素化アルキル基;ただし、少なくとも一方はフッ素化アルキル基)で示される含フッ素エーテルを含有することができる。
上記含フッ素エーテルを含有することにより、さらに耐酸化性が高く安全性の高い電池を作製することができる。
但し、上記含フッ素エーテルの不純物である、下記(I’)、(II’)で示される化合物を、上記含フッ素エーテルに対して合計で5000ppm以下含有することが好ましい。
(I’)含フッ素不飽和化合物(以下、化合物(I’)ということもある)
(II’)一般式(9):
Rf1OH (9)
(式中、Rf1は前記同様)
で示される水酸基含有化合物(以下、化合物(II’)ということもある)。
Rf1OH (9)
で示されるものである。ここで、Rf1としては、一般式(8)と同様のものを挙げることができ、具体的には、(II’-1)HCF2CF2CH2OHを挙げることができる。
含フッ素不飽和化合物(I’)が、
(I’-1)CF2=CFCH2OCF2CF2H、及び、
(I’-2)HCF2CF=CHOCF2CF2H
であり、
水酸基含有化合物(II’)が、
(II’-1)HCF2CF2CH2OH
である組み合わせ、又は、
一般式(8)で示される含フッ素エーテルが、HCF2CF2CH2OCF2CFHCF3であり、
含フッ素不飽和化合物(I’)が、
(I’-3)CF2=CFCH2OCF2CFHCF3、
(I’-4)HCF2CF2CH2OCF=CFCF3、
(I’-5)HCF2CF2CH2OCF2CF=CF2、及び、
(I’-6)HCF2CF=CHOCF2CFHCF3
であり、
水酸基含有化合物(II’)が、
(II’-1)HCF2CF2CH2OH
である組み合わせが好ましい。
このため、本発明の非水電解液を用いた電気化学デバイスは、高温での保存特性及び高電圧サイクル特性に優れる。そのような本発明の非水電解液を備えることを特徴とする電気化学デバイスもまた本発明の一つである。
本発明の非水電解液を用いた電気化学デバイスとしては、リチウムイオン二次電池や電気二重層キャパシタを挙げることができる。以下、リチウムイオン二次電池の構成について説明する。
負極、正極、及び、上述した本発明の非水電解液を備えたリチウムイオン二次電池もまた、本発明の一つである。
本発明の非水電解液を用いたリチウムイオン二次電池を備えることを特徴とするモジュールもまた本発明の一つである。
10Lの四つ口フラスコに還流管と滴下ロートを設置して反応装置を準備した。その後、氷浴下でCF3CH2OH(750g;7.5モル)とクロロギ酸メチル(708.8g;7.5モル)と溶媒としてジグライム(700mL)を加え攪拌した。その後滴下ロートを用いて、発熱に注意しながらトリエチルアミン(758.3g;7.5モル)を加えた。次第にトリエチルアミン塩酸塩が析出し反応溶液が乳白色へと変化した。
反応終了後、反応溶液を1N HCl水溶液で洗浄した。
10Lの四つ口フラスコに還流管と滴下ロートを設置して反応装置を準備した。その後、氷浴下でCF3CH2OH(750g;7.5モル)とクロロギ酸エチル(813.3g;7.5モル)と溶媒としてジグライム(1250mL)を加え攪拌した。その後滴下ロートを用いて、発熱に注意しながらトリエチルアミン(758.3g;7.5モル)を加えた。次第にトリエチルアミン塩酸塩が析出し反応溶液が乳白色へと変化した。反応終了後、反応溶液を1N HCl水溶液で洗浄した。
10Lの四つ口フラスコに還流管と滴下ロートを設置して反応装置を準備した。その後、氷浴下でCF3CH2OH(750g;7.5モル)とクロロギ酸メチル(708.8g;7.5モル)と溶媒としてジグライム(700mL)を加え攪拌した。その後滴下ロートを用いて、発熱に注意しながらトリエチルアミン(758.3g;7.5モル)を加えた。次第にトリエチルアミン塩酸塩が析出し反応溶液が乳白色へと変化した。
反応終了後、反応溶液を1N HCl水溶液で洗浄した。
乾燥アルゴン雰囲気下、20ppmのHOCH2CH2OHを含むエチレンカーボネートとエチルメチルカーボネートとの混合物(容量比3:7)97重量部に、精留CのCF3CH2OCO2CH3 3重量部を添加し、次いで十分に乾燥したLiPF6を1モル/リットルの割合となるように溶解して電解液とした。
LiNi1/3Mn1/3Co1/3O2とカーボンブラックとポリフッ化ビニリデン((株)クレハ製、商品名KF-7200)を92/3/5(質量%比)で混合した正極活物質をN-メチル-2-ピロリドンに分散してスラリー状とした正極合剤スラリーを準備した。アルミ集電体上に、得られた正極合剤スラリーを均一に塗布し、乾燥して正極合剤層(厚さ50μm)を形成し、その後、ローラプレス機により圧縮成形して、正極積層体を製造した。正極積層体を打ち抜き機で直径1.6mmの大きさに打ち抜き、円状の正極を作製した。
コイン型リチウムイオン二次電池について、つぎの要領で高電圧でのサイクル特性と高温保存特性を調べた。
充電:0.5C、4.3Vにて充電電流が1/10Cになるまでを保持(CC・CV充電)
放電:0.5C、3.0Vcut(CC放電)
サイクル特性については、上記の充放電条件(1.0Cで所定の電圧にて充電電流が1/10Cになるまで充電し1C相当の電流で3.0Vまで放電する)で行う充放電サイクルを1サイクルとし、5サイクル後の放電容量と100サイクル後の放電容量を測定する。サイクル特性は、つぎの計算式で求められた値を容量維持率の値とする。その結果を表4に示す。
高温保存特性については上記の充放電条件(1.0Cで所定の電圧にて充電電流が1/10Cになるまで充電し1C相当の電流で3.0Vまで放電する)により充放電を行い、放電容量を調べた。その後、再度上記の充電条件で充電をし、85℃の恒温槽の中に1日保存した。保存後の電池を25℃において、上記の放電条件で放電終止電圧3Vまで放電させて残存容量を測定し、さらに上記の充電条件で充電した後、上記の放電条件での定電流で、放電終止電圧3Vまで放電を行って回復容量を測定した。保存前の放電容量を100とした場合の回復容量を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留BのCF3CH2OCO2CH3を使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留FのCF3CH2OCO2C2H5を使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留EのCF3CH2OCO2C2H5を使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留IのCF3CH2OCO2CH3を使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留JのCF3CH2OCO2CH3を使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留KのCF3CH2OCO2CH3を使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留LのCF3CH2OCO2CH3を使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留MのCF3CH2OCO2CH3を使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留AのCF3CH2OCO2CH3を使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留CのCF3CH2OCO2CH3に化合物(I-1)を10000ppmの割合で添加したものを使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留CのCF3CH2OCO2CH3に化合物(II-1)を10000ppmの割合で添加したものを使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留CのCF3CH2OCO2CH3に化合物(III-1)を10000ppmの割合で添加したものを使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留DのCF3CH2OCO2C2H5にした以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留GのCF3CH2OCO2C2H5にした以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留HのCF3CH2OCO2C2H5にした以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留FのCF3CH2OCO2C2H5に化合物(I-1)を10000ppmの割合で添加したものを使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留FのCF3CH2OCO2C2H5に化合物(II-2)を10000ppmの割合で添加したものを使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
実施例1において精留CのCF3CH2OCO2CH3の代わりに、精留FのCF3CH2OCO2C2H5に化合物(III-2)を10000ppmの割合で添加したものを使用した以外は実施例1と同様にして電池を作製し試験を行った。結果を表4に示す。
乾燥アルゴン雰囲気下、20ppmのHOCHCH3CH2OHを含むプロピレンカーボネートと10ppmのHOCH2CH2OHを含むエチレンカーボネートとエチルメチルカーボネートとの混合物(容量比1:2:7)97重量部に、HCF2CF2CH2OCF2CF2Hの精留液C 3重量部を添加し、次いで十分に乾燥したLiPF6を1モル/リットルの割合となるように溶解して電解液とし、実施例1と同様にして電池を作成し試験を行った。結果を表5に示す。
乾燥アルゴン雰囲気下、10ppmのHOCHFCH2OHを含むフルオロエチレンカーボネートと10ppmのHOCH2CH2OHを含むエチレンカーボネートとエチルメチルカーボネートとの混合物(容量比1:2:7)97重量部に、HCF2CF2CH2OCF2CF2Hの精留液C 3重量部を添加し、次いで十分に乾燥したLiPF6を1モル/リットルの割合となるように溶解して電解液とし、実施例1と同様にして電池を作成し試験を行った。結果を表5に示す。
乾燥アルゴン雰囲気下、70ppmのHOCH2CH2OHを含むエチレンカーボネートとエチルメチルカーボネートとの混合物(容量比3:7)97重量部に、CF3CH2OCO2CH3の精留液C 3重量部を添加し、次いで十分に乾燥したLiPF6を1モル/リットルの割合となるように溶解して電解液とし、実施例1と同様にして電池を作成し試験を行った。結果を表5に示す。
実施例10の20ppmのHOCHCH3CH2OHを含むプロピレンカーボネートの代わりに、50ppmのHOCHCH3CH2OHを含むプロピレンカーボネートを使用した以外は実施例10と同様にして電解液を調製し、電池を作製し試験を行った。結果を表5に示す。
実施例11の10ppmのHOCHFCH2OHを含むフルオロエチレンカーボネートの代わりに、50ppmのHOCHFCH2OHを含むフルオロエチレンカーボネートを使用した以外は実施例11と同様にして電池を作製し試験を行った。結果を表5に示す。
Claims (9)
- 非水溶媒及び電解質塩を含む非水電解液であって、
前記非水溶媒が、一般式(1):
RfOCOOR (1)
(式中、Rfは炭素数1~4のフッ素化アルキル基であり、Rは炭素数1~4のアルキル基である)で示される含フッ素鎖状カーボネート(A)、並びに、
エチレンカーボネート、プロピレンカーボネート及びフルオロエチレンカーボネートからなる群より選択される少なくとも1種の環状カーボネート(B)を含有し、かつ、
(I)一般式(2):
RfOH (2)
(式中、Rfは前記同様である)で示される化合物、
(II)一般式(3):
ROH (3)
(式中、Rは前記同様である)で示される化合物、及び、
(III)一般式(4):
ROCOCl (4)
(式中、Rは前記同様である)で示される化合物からなる群より選択される少なくとも1種の化合物(α);並びに、
(IV)一般式(5):
HO(CH2CH2)nOH (5)
(式中、nは1~5の整数である)で示される化合物、
(V)一般式(6):
HO(CHCH3CH2)nOH (6)
(式中、nは1~5の整数である)で示される化合物、及び、
(VI)一般式(7):
HO(CHFCH2)nOH (7)
(式中、nは1~5の整数である)で示される化合物からなる群より選択される少なくとも1種の化合物(β)を含有し、
前記化合物(α)の含有量が含フッ素鎖状カーボネート(A)に対して5000ppm以下であり、前記化合物(β)の含有量が環状カーボネート(B)に対して50ppm以下であることを特徴とする非水電解液。 - 含フッ素鎖状カーボネート(A)が、CF3CH2OCOOCH3、又は、CF3CH2OCOOCH2CH3である請求項1記載の非水電解液。
- 含フッ素鎖状カーボネート(A)の含有量が、非水溶媒中0.5~90重量%である請求項1又は2記載の非水電解液。
- 環状カーボネート(B)が、エチレンカーボネートであり、化合物(β)が、一般式(5)で示される化合物である請求項1、2又は3記載の非水電解液。
- 環状カーボネート(B)が、プロピレンカーボネートであり、化合物(β)が、一般式(6)で示される化合物である請求項1、2、3又は4記載の非水電解液。
- 環状カーボネート(B)が、フルオロエチレンカーボネートであり、化合物(β)が、一般式(7)で示される化合物である請求項1、2、3、4又は5記載の非水電解液。
- 請求項1、2、3、4、5又は6記載の非水電解液を備えることを特徴とする電気化学デバイス。
- 正極、負極、及び、請求項1、2、3、4、5又は6記載の非水電解液を備えることを特徴とするリチウムイオン二次電池。
- 請求項8記載のリチウムイオン二次電池を備えることを特徴とするモジュール。
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JP2014538524A JPWO2014050877A1 (ja) | 2012-09-28 | 2013-09-25 | 非水電解液、電気化学デバイス、リチウムイオン二次電池、及び、モジュール |
CN201380050258.6A CN104685700A (zh) | 2012-09-28 | 2013-09-25 | 非水电解液、电化学器件、锂离子二次电池以及组件 |
US14/429,285 US20150235772A1 (en) | 2012-09-28 | 2013-09-25 | Nonaqueous electrolyte solution, electrochemical device, lithium ion secondary cell, and module |
KR1020157009134A KR20150054951A (ko) | 2012-09-28 | 2013-09-25 | 비수 전해액, 전기 화학 디바이스, 리튬 이온 이차 전지 및 모듈 |
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Cited By (4)
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WO2014136648A1 (ja) * | 2013-03-04 | 2014-09-12 | ダイキン工業株式会社 | 電解液、電気化学デバイス、リチウムイオン二次電池、及び、モジュール |
JP2020518110A (ja) * | 2017-05-27 | 2020-06-18 | シェンズェン カプチェム テクノロジー カンパニー リミテッドShenzhen Capchem Technology Co., Ltd. | リチウムイオン電池非水電解液およびリチウムイオン電池 |
US10889537B2 (en) | 2016-11-28 | 2021-01-12 | Samhwa Paints Industries Co., Ltd. | Method for producing fluorine-containing dialkyl carbonate compounds |
WO2022138705A1 (ja) * | 2020-12-24 | 2022-06-30 | 積水化学工業株式会社 | 電解液、及び非水電解液二次電池 |
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US11929461B2 (en) * | 2016-04-12 | 2024-03-12 | Daikin Industries, Ltd. | Electrolytic solution, electrochemical device, lithium-ion secondary cell and module |
US10099994B2 (en) | 2016-09-12 | 2018-10-16 | Uchicago Argonne, Llc | Process for the production of high voltage electrolyte solvents for Li-ion batteries |
US10294189B2 (en) * | 2016-09-20 | 2019-05-21 | Uchicago Argonne, Llc | Process for producing fluorinated electrolyte solvent |
CN111656595B (zh) * | 2018-01-30 | 2024-01-05 | 大金工业株式会社 | 电解液、电化学器件、锂离子二次电池及组件 |
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