JP6770295B2 - 非水電解液及びこれを備えた蓄電デバイス - Google Patents
非水電解液及びこれを備えた蓄電デバイス Download PDFInfo
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- JP6770295B2 JP6770295B2 JP2015008105A JP2015008105A JP6770295B2 JP 6770295 B2 JP6770295 B2 JP 6770295B2 JP 2015008105 A JP2015008105 A JP 2015008105A JP 2015008105 A JP2015008105 A JP 2015008105A JP 6770295 B2 JP6770295 B2 JP 6770295B2
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- Prior art keywords
- aqueous electrolyte
- phosphate
- carbonate
- electrolytic solution
- aqueous
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- 239000011255 nonaqueous electrolyte Substances 0.000 title claims description 68
- 238000003860 storage Methods 0.000 title description 13
- -1 Thioether sulfide Chemical class 0.000 claims description 103
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 45
- 229910001416 lithium ion Inorganic materials 0.000 claims description 29
- 239000008151 electrolyte solution Substances 0.000 claims description 28
- 239000002904 solvent Substances 0.000 claims description 28
- 150000001450 anions Chemical class 0.000 claims description 26
- 229940006487 lithium cation Drugs 0.000 claims description 16
- 239000003963 antioxidant agent Substances 0.000 claims description 13
- 125000004432 carbon atom Chemical group C* 0.000 claims description 13
- 230000003078 antioxidant effect Effects 0.000 claims description 11
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims description 11
- 125000000217 alkyl group Chemical group 0.000 claims description 10
- 239000003125 aqueous solvent Substances 0.000 claims description 10
- 239000002516 radical scavenger Substances 0.000 claims description 9
- 239000003063 flame retardant Substances 0.000 claims description 8
- 229910052731 fluorine Inorganic materials 0.000 claims description 8
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims description 8
- 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 claims description 7
- 125000001153 fluoro group Chemical group F* 0.000 claims description 6
- 125000003709 fluoroalkyl group Chemical group 0.000 claims description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 4
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 3
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052794 bromium Inorganic materials 0.000 claims description 3
- 239000002530 phenolic antioxidant Substances 0.000 claims description 3
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 claims description 2
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 claims description 2
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 claims description 2
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 claims description 2
- YAOMHRRYSRRRKP-UHFFFAOYSA-N 1,2-dichloropropyl 2,3-dichloropropyl 3,3-dichloropropyl phosphate Chemical compound ClC(Cl)CCOP(=O)(OC(Cl)C(Cl)C)OCC(Cl)CCl YAOMHRRYSRRRKP-UHFFFAOYSA-N 0.000 claims 1
- CGSLYBDCEGBZCG-UHFFFAOYSA-N Octicizer Chemical compound C=1C=CC=CC=1OP(=O)(OCC(CC)CCCC)OC1=CC=CC=C1 CGSLYBDCEGBZCG-UHFFFAOYSA-N 0.000 claims 1
- CMPQUABWPXYYSH-UHFFFAOYSA-N phenyl phosphate Chemical compound OP(O)(=O)OC1=CC=CC=C1 CMPQUABWPXYYSH-UHFFFAOYSA-N 0.000 claims 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims 1
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims 1
- KOWVWXQNQNCRRS-UHFFFAOYSA-N tris(2,4-dimethylphenyl) phosphate Chemical compound CC1=CC(C)=CC=C1OP(=O)(OC=1C(=CC(C)=CC=1)C)OC1=CC=C(C)C=C1C KOWVWXQNQNCRRS-UHFFFAOYSA-N 0.000 claims 1
- 150000005676 cyclic carbonates Chemical class 0.000 description 33
- 239000003792 electrolyte Substances 0.000 description 22
- 150000003839 salts Chemical class 0.000 description 21
- 238000000034 method Methods 0.000 description 17
- 239000000203 mixture Substances 0.000 description 16
- 229910052744 lithium Inorganic materials 0.000 description 15
- 239000000463 material Substances 0.000 description 13
- 229920000642 polymer Polymers 0.000 description 13
- 150000001875 compounds Chemical class 0.000 description 12
- 238000000354 decomposition reaction Methods 0.000 description 12
- 239000003381 stabilizer Substances 0.000 description 12
- 239000007774 positive electrode material Substances 0.000 description 11
- 239000000654 additive Substances 0.000 description 10
- 230000006866 deterioration Effects 0.000 description 10
- 239000012752 auxiliary agent Substances 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 9
- 150000003254 radicals Chemical class 0.000 description 8
- 239000007983 Tris buffer Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 6
- 150000001768 cations Chemical class 0.000 description 6
- GAEKPEKOJKCEMS-UHFFFAOYSA-N gamma-valerolactone Chemical compound CC1CCC(=O)O1 GAEKPEKOJKCEMS-UHFFFAOYSA-N 0.000 description 6
- VDVLPSWVDYJFRW-UHFFFAOYSA-N lithium;bis(fluorosulfonyl)azanide Chemical compound [Li+].FS(=O)(=O)[N-]S(F)(=O)=O VDVLPSWVDYJFRW-UHFFFAOYSA-N 0.000 description 6
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 5
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 150000001767 cationic compounds Chemical class 0.000 description 5
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 5
- 229910001411 inorganic cation Inorganic materials 0.000 description 5
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 4
- 108010000020 Platelet Factor 3 Proteins 0.000 description 4
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007773 negative electrode material Substances 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 230000033116 oxidation-reduction process Effects 0.000 description 4
- HHVIBTZHLRERCL-UHFFFAOYSA-N sulfonyldimethane Chemical compound CS(C)(=O)=O HHVIBTZHLRERCL-UHFFFAOYSA-N 0.000 description 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 3
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- JFDZBHWFFUWGJE-UHFFFAOYSA-N benzonitrile Chemical compound N#CC1=CC=CC=C1 JFDZBHWFFUWGJE-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 150000002170 ethers Chemical class 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 150000002596 lactones Chemical class 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 125000001889 triflyl group Chemical group FC(F)(F)S(*)(=O)=O 0.000 description 3
- ZQMPWXFHAUDENN-UHFFFAOYSA-N 1,2-bis[(2-methylphenyl)amino]ethane Natural products CC1=CC=CC=C1NCCNC1=CC=CC=C1C ZQMPWXFHAUDENN-UHFFFAOYSA-N 0.000 description 2
- WJFKNYWRSNBZNX-UHFFFAOYSA-N 10H-phenothiazine Chemical compound C1=CC=C2NC3=CC=CC=C3SC2=C1 WJFKNYWRSNBZNX-UHFFFAOYSA-N 0.000 description 2
- CRMJLJFDPNJIQA-UHFFFAOYSA-N 2,4-difluoro-1-methoxybenzene Chemical compound COC1=CC=C(F)C=C1F CRMJLJFDPNJIQA-UHFFFAOYSA-N 0.000 description 2
- VWIIJDNADIEEDB-UHFFFAOYSA-N 3-methyl-1,3-oxazolidin-2-one Chemical compound CN1CCOC1=O VWIIJDNADIEEDB-UHFFFAOYSA-N 0.000 description 2
- KBTMGSMZIKLAHN-UHFFFAOYSA-N 4-bromo-1,2-dimethoxybenzene Chemical compound COC1=CC=C(Br)C=C1OC KBTMGSMZIKLAHN-UHFFFAOYSA-N 0.000 description 2
- BJWMSGRKJIOCNR-UHFFFAOYSA-N 4-ethenyl-1,3-dioxolan-2-one Chemical compound C=CC1COC(=O)O1 BJWMSGRKJIOCNR-UHFFFAOYSA-N 0.000 description 2
- OZJPLYNZGCXSJM-UHFFFAOYSA-N 5-valerolactone Chemical compound O=C1CCCCO1 OZJPLYNZGCXSJM-UHFFFAOYSA-N 0.000 description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 description 2
- KEQFTVQCIQJIQW-UHFFFAOYSA-N N-Phenyl-2-naphthylamine Chemical compound C=1C=C2C=CC=CC2=CC=1NC1=CC=CC=C1 KEQFTVQCIQJIQW-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 150000008065 acid anhydrides Chemical class 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
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- 150000001412 amines Chemical class 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- DMEGYFMYUHOHGS-UHFFFAOYSA-N cycloheptane Chemical compound C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 2
- WHHGLZMJPXIBIX-UHFFFAOYSA-N decabromodiphenyl ether Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1OC1=C(Br)C(Br)=C(Br)C(Br)=C1Br WHHGLZMJPXIBIX-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- MTZQAGJQAFMTAQ-UHFFFAOYSA-N ethyl benzoate Chemical compound CCOC(=O)C1=CC=CC=C1 MTZQAGJQAFMTAQ-UHFFFAOYSA-N 0.000 description 2
- 238000000806 fluorine-19 nuclear magnetic resonance spectrum Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 150000003949 imides Chemical class 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910003002 lithium salt Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- QPJVMBTYPHYUOC-UHFFFAOYSA-N methyl benzoate Chemical compound COC(=O)C1=CC=CC=C1 QPJVMBTYPHYUOC-UHFFFAOYSA-N 0.000 description 2
- 150000002825 nitriles Chemical class 0.000 description 2
- 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 2
- 125000006340 pentafluoro ethyl group Chemical group FC(F)(F)C(F)(F)* 0.000 description 2
- 229950000688 phenothiazine Drugs 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
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- 239000004926 polymethyl methacrylate Substances 0.000 description 2
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- 238000003825 pressing Methods 0.000 description 2
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 2
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 description 2
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- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 2
- HVLLSGMXQDNUAL-UHFFFAOYSA-N triphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 HVLLSGMXQDNUAL-UHFFFAOYSA-N 0.000 description 2
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 2
- GPOGLVDBOFRHDV-UHFFFAOYSA-N (2-nonylphenyl) dihydrogen phosphite Chemical compound CCCCCCCCCC1=CC=CC=C1OP(O)O GPOGLVDBOFRHDV-UHFFFAOYSA-N 0.000 description 1
- SSYDTHANSGMJTP-ZXZARUISSA-N (3s,4r)-oxolane-3,4-diol Chemical compound O[C@H]1COC[C@H]1O SSYDTHANSGMJTP-ZXZARUISSA-N 0.000 description 1
- GETTZEONDQJALK-UHFFFAOYSA-N (trifluoromethyl)benzene Chemical compound FC(F)(F)C1=CC=CC=C1 GETTZEONDQJALK-UHFFFAOYSA-N 0.000 description 1
- UTVSTXBMSHWVAR-UHFFFAOYSA-N 1,1-bis(2,5-ditert-butylphenyl)-2,2-bis(hydroxymethyl)propane-1,3-diol dihydroxyphosphanyl dihydrogen phosphite Chemical compound OP(O)OP(O)O.C(C)(C)(C)C1=C(C=C(C=C1)C(C)(C)C)C(O)(C(CO)(CO)CO)C1=C(C=CC(=C1)C(C)(C)C)C(C)(C)C UTVSTXBMSHWVAR-UHFFFAOYSA-N 0.000 description 1
- BZQKBFHEWDPQHD-UHFFFAOYSA-N 1,2,3,4,5-pentabromo-6-[2-(2,3,4,5,6-pentabromophenyl)ethyl]benzene Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1CCC1=C(Br)C(Br)=C(Br)C(Br)=C1Br BZQKBFHEWDPQHD-UHFFFAOYSA-N 0.000 description 1
- DEIGXXQKDWULML-UHFFFAOYSA-N 1,2,5,6,9,10-hexabromocyclododecane Chemical compound BrC1CCC(Br)C(Br)CCC(Br)C(Br)CCC1Br DEIGXXQKDWULML-UHFFFAOYSA-N 0.000 description 1
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 description 1
- LZDKZFUFMNSQCJ-UHFFFAOYSA-N 1,2-diethoxyethane Chemical compound CCOCCOCC LZDKZFUFMNSQCJ-UHFFFAOYSA-N 0.000 description 1
- WDXYVJKNSMILOQ-UHFFFAOYSA-N 1,3,2-dioxathiolane 2-oxide Chemical compound O=S1OCCO1 WDXYVJKNSMILOQ-UHFFFAOYSA-N 0.000 description 1
- VNQNXQYZMPJLQX-UHFFFAOYSA-N 1,3,5-tris[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]-1,3,5-triazinane-2,4,6-trione Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CN2C(N(CC=3C=C(C(O)=C(C=3)C(C)(C)C)C(C)(C)C)C(=O)N(CC=3C=C(C(O)=C(C=3)C(C)(C)C)C(C)(C)C)C2=O)=O)=C1 VNQNXQYZMPJLQX-UHFFFAOYSA-N 0.000 description 1
- CYSGHNMQYZDMIA-UHFFFAOYSA-N 1,3-Dimethyl-2-imidazolidinon Chemical compound CN1CCN(C)C1=O CYSGHNMQYZDMIA-UHFFFAOYSA-N 0.000 description 1
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 1
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- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- PIYNUZCGMLCXKJ-UHFFFAOYSA-N 1,4-dioxane-2,6-dione Chemical compound O=C1COCC(=O)O1 PIYNUZCGMLCXKJ-UHFFFAOYSA-N 0.000 description 1
- MBDUIEKYVPVZJH-UHFFFAOYSA-N 1-ethylsulfonylethane Chemical compound CCS(=O)(=O)CC MBDUIEKYVPVZJH-UHFFFAOYSA-N 0.000 description 1
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- KYEACNNYFNZCST-UHFFFAOYSA-N 1-methylpyrrolidine-2,5-dione Chemical compound CN1C(=O)CCC1=O KYEACNNYFNZCST-UHFFFAOYSA-N 0.000 description 1
- YBJCDTIWNDBNTM-UHFFFAOYSA-N 1-methylsulfonylethane Chemical compound CCS(C)(=O)=O YBJCDTIWNDBNTM-UHFFFAOYSA-N 0.000 description 1
- BBRHQNMMUUMVDE-UHFFFAOYSA-N 1-n,2-n-diphenylpropane-1,2-diamine Chemical compound C=1C=CC=CC=1NC(C)CNC1=CC=CC=C1 BBRHQNMMUUMVDE-UHFFFAOYSA-N 0.000 description 1
- QXBUYALKJGBACG-UHFFFAOYSA-N 10-methylphenothiazine Chemical compound C1=CC=C2N(C)C3=CC=CC=C3SC2=C1 QXBUYALKJGBACG-UHFFFAOYSA-N 0.000 description 1
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 description 1
- NOGFHTGYPKWWRX-UHFFFAOYSA-N 2,2,6,6-tetramethyloxan-4-one Chemical compound CC1(C)CC(=O)CC(C)(C)O1 NOGFHTGYPKWWRX-UHFFFAOYSA-N 0.000 description 1
- GXURZKWLMYOCDX-UHFFFAOYSA-N 2,2-bis(hydroxymethyl)propane-1,3-diol;dihydroxyphosphanyl dihydrogen phosphite Chemical compound OP(O)OP(O)O.OCC(CO)(CO)CO GXURZKWLMYOCDX-UHFFFAOYSA-N 0.000 description 1
- BSYJHYLAMMJNRC-UHFFFAOYSA-N 2,4,4-trimethylpentan-2-ol Chemical compound CC(C)(C)CC(C)(C)O BSYJHYLAMMJNRC-UHFFFAOYSA-N 0.000 description 1
- BSWWXRFVMJHFBN-UHFFFAOYSA-N 2,4,6-tribromophenol Chemical compound OC1=C(Br)C=C(Br)C=C1Br BSWWXRFVMJHFBN-UHFFFAOYSA-N 0.000 description 1
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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 1
- 238000005266 casting Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000003983 crown ethers Chemical class 0.000 description 1
- QYQADNCHXSEGJT-UHFFFAOYSA-N cyclohexane-1,1-dicarboxylate;hydron Chemical compound OC(=O)C1(C(O)=O)CCCCC1 QYQADNCHXSEGJT-UHFFFAOYSA-N 0.000 description 1
- GLOQRSIADGSLRX-UHFFFAOYSA-N decyl diphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OCCCCCCCCCC)OC1=CC=CC=C1 GLOQRSIADGSLRX-UHFFFAOYSA-N 0.000 description 1
- UAEWCWCMYQAIDR-UHFFFAOYSA-N diethyl methyl phosphate Chemical compound CCOP(=O)(OC)OCC UAEWCWCMYQAIDR-UHFFFAOYSA-N 0.000 description 1
- 125000006001 difluoroethyl group Chemical group 0.000 description 1
- 125000001028 difluoromethyl group Chemical group [H]C(F)(F)* 0.000 description 1
- DGTVXEHQMSJRPE-UHFFFAOYSA-M difluorophosphinate Chemical class [O-]P(F)(F)=O DGTVXEHQMSJRPE-UHFFFAOYSA-M 0.000 description 1
- ROORDVPLFPIABK-UHFFFAOYSA-N diphenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC1=CC=CC=C1 ROORDVPLFPIABK-UHFFFAOYSA-N 0.000 description 1
- GUVUOGQBMYCBQP-UHFFFAOYSA-N dmpu Chemical compound CN1CCCN(C)C1=O GUVUOGQBMYCBQP-UHFFFAOYSA-N 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- JQVXMIPNQMYRPE-UHFFFAOYSA-N ethyl dimethyl phosphate Chemical compound CCOP(=O)(OC)OC JQVXMIPNQMYRPE-UHFFFAOYSA-N 0.000 description 1
- 125000003784 fluoroethyl group Chemical group [H]C([H])(F)C([H])([H])* 0.000 description 1
- 125000004216 fluoromethyl group Chemical group [H]C([H])(F)* 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011245 gel electrolyte Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- VANNPISTIUFMLH-UHFFFAOYSA-N glutaric anhydride Chemical compound O=C1CCCC(=O)O1 VANNPISTIUFMLH-UHFFFAOYSA-N 0.000 description 1
- ZTOMUSMDRMJOTH-UHFFFAOYSA-N glutaronitrile Chemical compound N#CCCCC#N ZTOMUSMDRMJOTH-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- CAYGQBVSOZLICD-UHFFFAOYSA-N hexabromobenzene Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1Br CAYGQBVSOZLICD-UHFFFAOYSA-N 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 125000006289 hydroxybenzyl group Chemical group 0.000 description 1
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Substances C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- LRDFRRGEGBBSRN-UHFFFAOYSA-N isobutyronitrile Chemical compound CC(C)C#N LRDFRRGEGBBSRN-UHFFFAOYSA-N 0.000 description 1
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 229940095102 methyl benzoate Drugs 0.000 description 1
- 125000006178 methyl benzyl group Chemical group 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- MBABOKRGFJTBAE-UHFFFAOYSA-N methyl methanesulfonate Chemical compound COS(C)(=O)=O MBABOKRGFJTBAE-UHFFFAOYSA-N 0.000 description 1
- XTBFPVLHGVYOQH-UHFFFAOYSA-N methyl phenyl carbonate Chemical compound COC(=O)OC1=CC=CC=C1 XTBFPVLHGVYOQH-UHFFFAOYSA-N 0.000 description 1
- 125000004170 methylsulfonyl group Chemical group [H]C([H])([H])S(*)(=O)=O 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229940074371 monofluorophosphate Drugs 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- KESXDDATSRRGAH-UHFFFAOYSA-N n-(4-hydroxyphenyl)butanamide Chemical compound CCCC(=O)NC1=CC=C(O)C=C1 KESXDDATSRRGAH-UHFFFAOYSA-N 0.000 description 1
- VQLURHRLTDWRLX-UHFFFAOYSA-N n-(4-hydroxyphenyl)nonanamide Chemical compound CCCCCCCCC(=O)NC1=CC=C(O)C=C1 VQLURHRLTDWRLX-UHFFFAOYSA-N 0.000 description 1
- YASWBJXTHOXPGK-UHFFFAOYSA-N n-(4-hydroxyphenyl)octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NC1=CC=C(O)C=C1 YASWBJXTHOXPGK-UHFFFAOYSA-N 0.000 description 1
- LVZUNTGFCXNQAF-UHFFFAOYSA-N n-nonyl-n-phenylaniline Chemical compound C=1C=CC=CC=1N(CCCCCCCCC)C1=CC=CC=C1 LVZUNTGFCXNQAF-UHFFFAOYSA-N 0.000 description 1
- RQVGZVZFVNMBGS-UHFFFAOYSA-N n-octyl-n-phenylaniline Chemical compound C=1C=CC=CC=1N(CCCCCCCC)C1=CC=CC=C1 RQVGZVZFVNMBGS-UHFFFAOYSA-N 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- LYGJENNIWJXYER-UHFFFAOYSA-N nitromethane Chemical compound C[N+]([O-])=O LYGJENNIWJXYER-UHFFFAOYSA-N 0.000 description 1
- 125000003261 o-tolyl group Chemical group [H]C1=C([H])C(*)=C(C([H])=C1[H])C([H])([H])[H] 0.000 description 1
- CYCBIVGDSMISKD-UHFFFAOYSA-N o-tridecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanethioate Chemical compound CCCCCCCCCCCCCOC(=S)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 CYCBIVGDSMISKD-UHFFFAOYSA-N 0.000 description 1
- NOUWNNABOUGTDQ-UHFFFAOYSA-N octane Chemical compound CCCCCCC[CH2+] NOUWNNABOUGTDQ-UHFFFAOYSA-N 0.000 description 1
- CDXVUROVRIFQMV-UHFFFAOYSA-N oxo(diphenoxy)phosphanium Chemical compound C=1C=CC=CC=1O[P+](=O)OC1=CC=CC=C1 CDXVUROVRIFQMV-UHFFFAOYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Chemical compound [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- XRBCRPZXSCBRTK-UHFFFAOYSA-N phosphonous acid Chemical compound OPO XRBCRPZXSCBRTK-UHFFFAOYSA-N 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229920005569 poly(vinylidene fluoride-co-hexafluoropropylene) Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- WYVAMUWZEOHJOQ-UHFFFAOYSA-N propionic anhydride Chemical compound CCC(=O)OC(=O)CC WYVAMUWZEOHJOQ-UHFFFAOYSA-N 0.000 description 1
- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 229930195734 saturated hydrocarbon Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 125000004079 stearyl 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])C([H])([H])C([H])([H])C([H])([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
- 239000000126 substance Substances 0.000 description 1
- 229940014800 succinic anhydride Drugs 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
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- PCCVSPMFGIFTHU-UHFFFAOYSA-N tetracyanoquinodimethane Chemical compound N#CC(C#N)=C1C=CC(=C(C#N)C#N)C=C1 PCCVSPMFGIFTHU-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 235000019303 thiodipropionic acid Nutrition 0.000 description 1
- VJDDQSBNUHLBTD-UHFFFAOYSA-N trans-crotonic acid-anhydride Natural products CC=CC(=O)OC(=O)C=CC VJDDQSBNUHLBTD-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- XTTGYFREQJCEML-UHFFFAOYSA-N tributyl phosphite Chemical compound CCCCOP(OCCCC)OCCCC XTTGYFREQJCEML-UHFFFAOYSA-N 0.000 description 1
- TUQOTMZNTHZOKS-UHFFFAOYSA-N tributylphosphine Chemical compound CCCCP(CCCC)CCCC TUQOTMZNTHZOKS-UHFFFAOYSA-N 0.000 description 1
- IVIIAEVMQHEPAY-UHFFFAOYSA-N tridodecyl phosphite Chemical compound CCCCCCCCCCCCOP(OCCCCCCCCCCCC)OCCCCCCCCCCCC IVIIAEVMQHEPAY-UHFFFAOYSA-N 0.000 description 1
- RXJKFRMDXUJTEX-UHFFFAOYSA-N triethylphosphine Chemical compound CCP(CC)CC RXJKFRMDXUJTEX-UHFFFAOYSA-N 0.000 description 1
- 125000004205 trifluoroethyl group Chemical group [H]C([H])(*)C(F)(F)F 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- YFNKIDBQEZZDLK-UHFFFAOYSA-N triglyme Chemical compound COCCOCCOCCOC YFNKIDBQEZZDLK-UHFFFAOYSA-N 0.000 description 1
- SUXIKHBBPQWLHO-UHFFFAOYSA-N trihydroxy-(8-methylnonyl)-(8-methyl-1-phenylnonyl)-lambda5-phosphane Chemical compound CC(C)CCCCCCCP(O)(O)(O)C(CCCCCCC(C)C)C1=CC=CC=C1 SUXIKHBBPQWLHO-UHFFFAOYSA-N 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- AUPYNGCJRYOPQY-UHFFFAOYSA-N tris(2,5-ditert-butylphenyl) phosphite Chemical compound CC(C)(C)C1=CC=C(C(C)(C)C)C(OP(OC=2C(=CC=C(C=2)C(C)(C)C)C(C)(C)C)OC=2C(=CC=C(C=2)C(C)(C)C)C(C)(C)C)=C1 AUPYNGCJRYOPQY-UHFFFAOYSA-N 0.000 description 1
- ILLOBGFGKYTZRO-UHFFFAOYSA-N tris(2-ethylhexyl) phosphite Chemical compound CCCCC(CC)COP(OCC(CC)CCCC)OCC(CC)CCCC ILLOBGFGKYTZRO-UHFFFAOYSA-N 0.000 description 1
- JZNDMMGBXUYFNQ-UHFFFAOYSA-N tris(dodecylsulfanyl)phosphane Chemical compound CCCCCCCCCCCCSP(SCCCCCCCCCCCC)SCCCCCCCCCCCC JZNDMMGBXUYFNQ-UHFFFAOYSA-N 0.000 description 1
- QQBLOZGVRHAYGT-UHFFFAOYSA-N tris-decyl phosphite Chemical compound CCCCCCCCCCOP(OCCCCCCCCCC)OCCCCCCCCCC QQBLOZGVRHAYGT-UHFFFAOYSA-N 0.000 description 1
- WRSPWQHUHVRNFV-UHFFFAOYSA-N tris[3,5-di(nonyl)phenyl] phosphite Chemical compound CCCCCCCCCC1=CC(CCCCCCCCC)=CC(OP(OC=2C=C(CCCCCCCCC)C=C(CCCCCCCCC)C=2)OC=2C=C(CCCCCCCCC)C=C(CCCCCCCCC)C=2)=C1 WRSPWQHUHVRNFV-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
- Primary Cells (AREA)
- Secondary Cells (AREA)
Description
[N(XSO2)(FSO2)]- (1)
(一般式(1)中、Xは、フッ素原子、炭素数1〜6のアルキル基又は炭素数1〜6のフルオロアルキル基を表す。)
[PFl(CmF2m+1)6-l]- (0≦l≦6、1≦m≦4) (7)
[BFn(CoF2o+1)4-n]- (0≦n≦4、1≦o≦4) (8)
本発明の非水電解液とは、一般式(1):[N(XSO2)(FSO2)]-(一般式(1)中、Xは、フッ素原子、炭素数1〜6のアルキル基又は炭素数1〜6のフルオロアルキル基を表す。)で表されるアニオン(以下、スルホニルイミドアニオン(1)と称する。)と、リチウムカチオンと、ラジカル捕捉剤及び/又は酸化還元型安定化剤を含むところに特徴を有している。
本発明に係るスルホニルイミドアニオン(1)は、一般式(1):[N(XSO2)(FSO2)]-で表される。一般式(1)中、Xはフッ素原子、炭素数1〜6のアルキル基、又は炭素数1〜6のフルオロアルキル基を表す。炭素数1〜6のアルキル基は、直鎖状又は分枝鎖状のアルキル基であるのが好ましく、直鎖状のアルキル基がより好ましい。炭素数1〜6のアルキル基としては、例えば、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基、ペンチル基、ヘキシル基が挙げられる。炭素数1〜6のフルオロアルキル基としては、炭素数1〜6のアルキル基が有する水素原子の一部又は全部がフッ素原子で置換されたものが挙げられる。具体的には、フルオロメチル基、ジフルオロメチル基、トリフルオロメチル基、フルオロエチル基、ジフルオロエチル基、トリフルオロエチル基、ペンタフルオロエチル基等が挙げられる。これらの中でも、フッ素原子、トリフルオロメチル基及びペンタフルオロエチル基がXとして好ましい。
本発明の非水電解液は、さらに、下記一般式(7)及び一般式(8)で表されるアニオンよりなる群から選択される少なくとも1種のアニオンを含んでいてもよい。
[PFl(CmF2m+1)6-l]- (0≦l≦6、1≦m≦4) (7)
[BFn(CoF2o+1)4-n]- (0≦n≦4、1≦o≦4) (8)
本発明の非水電解液はリチウムカチオンを含む。リチウムカチオンは、スルホニルイミド化合物に由来するものであってもよく、また上述の電解質塩に由来するものであってもよい。本発明の非水電解液に含まれるリチウムカチオンの濃度は0.5mol/L以上であるのが好ましい。本発明の非水電解液のリチウムカチオン濃度は0.6mol/L以上であるのがより好ましく、さらに好ましくは0.8mol/L以上である。リチウムカチオン濃度が高すぎると電解液の粘度が上昇し、イオン伝導度が低下する虞があるので、好ましくは飽和濃度以下で使用するのが好ましい。より好ましくは5.0mol/L以下であり、さらに好ましくは2.5mol/L以下であり、特に好ましくは1.5mol/L以下である。
本発明の非水電解液は、ラジカル捕捉剤及び/又は酸化還元型安定化剤を4質量%以下の範囲で含む。これらの化合物の添加によって、高温保管時や高圧印加時に、溶媒やスルホニルイミドアニオン化合物の分解によって生成するラジカルを捕捉及び/又は安定化させ、それ以上スルホニルイミドアニオン化合物が分解するのを抑制し、電池特性の低下を抑制する。しかし、ラジカルの捕捉及び/又は安定化には、ラジカル捕捉剤及び/又は酸化還元型安定化剤は4質量%以下で充分であり、それ以上添加すると、電池特性そのものが低下するため、本発明では4質量%以下とする。
ラジカル捕捉剤は、ラジカルを捕捉できるものとして知られているものであればいずれも使用できる。例えば、酸化防止剤や難燃剤等が挙げられる。
酸化還元型安定化剤としては、例えば、特開2012−256502号公報に過充電制御剤として記載された化合物がいずれも使用できる。酸化還元型安定化剤としては、特に、1,2−ジメトキシ−4−ブロモベンゼン、2,4−ジフルオロアニソールが好ましい。なお、この特開2012−256502号公報に示された化合物は、非水電解液100質量%中、5質量%の使用で、過充電防止剤としての効果を発現することが開示されているが、高温保存時にラジカルを安定化させることについては記載がない。また、5質量%も添加すると、電池特性そのものが低下してしまう。
本発明の非水電解液は溶媒を含んでいてもよい。本発明の非水電解液に用いることのできる溶媒としては、電解質塩(スルホニルイミド化合物及び上述のリチウム塩等)を溶解、分散させられるものであれば特に限定されず、例えば、後述する環状カーボネートや環状カーボネート以外の溶媒といった非水系溶媒、溶媒に代えて用いられるポリマー及びポリマーゲル等の媒体等、電池に用いられる従来公知の溶媒はいずれも使用できる。
本発明に係る非水電解液は、リチウムイオン二次電池の各種特性の向上を目的とする添加剤を含んでいてもよい。
添加剤としては、無水酢酸、無水プロピオン酸、無水酪酸、無水クロトン酸、無水コハク酸、無水グルタル酸、無水マレイン酸、無水シトラコン酸、無水グルタコン酸、無水イタコン酸、無水ジグリコール酸、シクロヘキサンジカルボン酸無水物、シクロペンタンテトラカルボン酸二無水物等のカルボン酸無水物;エチレンサルファイト、1,3−プロパンスルトン、1,4−ブタンスルトン、メタンスルホン酸メチル、ブサルファン、スルホラン、スルホレン、ジメチルスルホン、テトラメチルチウラムモノスルフィド、トリメチレングリコール硫酸エステル等の含硫黄化合物;1−メチル−2−ピロリジノン、1−メチル−2−ピペリドン、3−メチル−2−オキサゾリジノン、1,3−ジメチル−2−イミダゾリジノン、N−メチルスクシンイミド等の含窒素化合物;モノフルオロリン酸塩、ジフルオロリン酸塩等のリン酸塩;ヘプタン、オクタン、シクロヘプタン等の飽和炭化水素化合物;等が挙げられる。
なお、非水電解液100質量%とは、上述したスルホニルイミド化合物、電解質塩、溶媒及び適宜用いられる添加剤等、非水電解液に含まれる全ての成分の合計を意味する。
本発明の非水電解液は、一次電池、リチウムイオン二次電池、リチウムイオンキャパシタ、充電及び放電機構を有する電池等の各種蓄電デバイスや、燃料電池に備えられるイオン伝導材料として使用することができる。以下では、これらを代表して、リチウムイオン二次電池について説明する。
リチウムイオン二次電池とは、リチウムイオンの吸蔵及び放出が可能な正極活物質を含有する正極、リチウムイオンの吸蔵及び放出が可能な負極活物質を含有する負極、及び非水電解液を有する。より詳細には、正極と負極との間にはセパレーターが設けられており、非水電解液は上記セパレーターに含浸された状態で、正極、負極等と共に外装ケースに収容されている。本発明のリチウムイオン二次電池は、上述した本発明の非水電解液を備えている。
正極は、正極活物質、導電助剤及び結着剤等を含む正極合剤が正極集電体に担持されてなるものであり、通常、シート状に成形されている。
導電助剤及び結着剤の配合量は、電池の使用目的(出力重視、エネルギー重視等)、イオン伝導性等を考慮して適宜調整することができる。
負極は、負極活物質、結着剤及び必要に応じて導電助剤等を含む負極合剤が負極集電体に担持されてなるものであり、通常、シート状に成形されている。
負極の製造方法としては、正極の製造方法と同様の方法を採用することができる。また、負極の製造時に使用する導電助剤、結着剤、材料分散用の溶媒も、正極で用いられるものと同様のものが用いられる。
セパレーターは正極と負極とを隔てるように配置されるものである。セパレーターには特に制限がなく、本発明では、従来公知のセパレーターはいずれも使用でき、例えば、特開2014−13704号公報に記載の各材料を用いることができる。
正極、負極、セパレーター及び非水電解液等を備えた電池素子は、リチウムイオン二次電池使用時の外部からの衝撃、環境劣化等から電池素子を保護するため電池外装材に収容される。本発明では、電池外装材の素材は特に限定されず従来公知の外装材はいずれも使用することができる。
プロピレンカーボネート(PC)に、非水電解液中でスルホニルイミドアニオン(1)を生成する化合物として、リチウムビス(フルオロスルホニル)イミド(LiFSI)が1.0mol/Lとなるように溶解させた。
Claims (5)
- 下記一般式(1)で表されるアニオンと、リチウムカチオンと、非水系溶媒とを含む非水電解液であって、
この非水電解液が、さらに、ラジカル捕捉剤を4質量%以下含み、
上記ラジカル捕捉剤が、
フェノール系酸化防止剤、
ジフェニルアミン系酸化防止剤、
ホスファイト系酸化防止剤、
チオエーテル系酸化防止剤、
臭素系難燃剤、
トリメチルフォスフェート、トリエチルフォスフェート、トリブチルフォスフェート、トリフェニルフォスフェート、トリクレジルフォスフェート、トリキシレニルフォスフェート、クレジルフェニルフォスフェート、2−エチルヘキシルジフェニルフォスフェート、及びトリス(ジクロロプロピル)フォスフェートよりなる群から選択される少なくとも一種であり、
上記非水系溶媒が、エチレンカーボネート、及びプロピレンカーボネートよりなる群から選択される少なくとも一種以上を含むことを特徴とする非水電解液。
[N(XSO2)(FSO2)]- (1)
(一般式(1)中、Xは、フッ素原子、炭素数1〜6のアルキル基又は炭素数1〜6のフルオロアルキル基を表す。) - 上記非水電解液が、さらに、下記一般式(7)及び一般式(8)で表されるアニオンよりなる群から選択される少なくとも1種のアニオンを含む請求項1に記載の非水電解液。
[PFl(CmF2m+1)6-l]- (0≦l≦6、1≦m≦4) (7)
[BFn(CoF2o+1)4-n]- (0≦n≦4、1≦o≦4) (8) - 上記非水電解液中の一般式(1)で表されるアニオンの含有量が、一般式(1)で表されるアニオン、上記一般式(7)及び一般式(8)で表されるアニオンの合計100mol%中、20mol%以上である請求項2に記載の非水電解液。
- 請求項1〜3のいずれかに記載の非水電解液を備えたことを特徴とするリチウムイオン二次電池。
- 定格充電電圧が4.2V超である請求項4に記載のリチウムイオン二次電池。
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