JP6529290B2 - 非水系ゲル電解質およびそれを用いた非水系ゲル電解質二次電池 - Google Patents
非水系ゲル電解質およびそれを用いた非水系ゲル電解質二次電池 Download PDFInfo
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- JP6529290B2 JP6529290B2 JP2015050200A JP2015050200A JP6529290B2 JP 6529290 B2 JP6529290 B2 JP 6529290B2 JP 2015050200 A JP2015050200 A JP 2015050200A JP 2015050200 A JP2015050200 A JP 2015050200A JP 6529290 B2 JP6529290 B2 JP 6529290B2
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- gel electrolyte
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- alkylene group
- polymer
- aqueous gel
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- 239000011245 gel electrolyte Substances 0.000 title claims description 75
- 229920000642 polymer Polymers 0.000 claims description 55
- 125000002947 alkylene group Chemical group 0.000 claims description 48
- 125000000524 functional group Chemical group 0.000 claims description 24
- 239000003792 electrolyte Substances 0.000 claims description 20
- 125000004450 alkenylene group Chemical group 0.000 claims description 18
- 125000004432 carbon atom Chemical group C* 0.000 claims description 14
- 125000006833 (C1-C5) alkylene group Chemical group 0.000 claims description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims description 10
- 125000003827 glycol group Chemical group 0.000 claims description 10
- 229920001223 polyethylene glycol Polymers 0.000 claims description 10
- 230000000269 nucleophilic effect Effects 0.000 claims description 8
- 150000003014 phosphoric acid esters Chemical class 0.000 claims description 7
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- 239000003125 aqueous solvent Substances 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- 238000004132 cross linking Methods 0.000 claims description 5
- 150000005676 cyclic carbonates Chemical class 0.000 claims description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 239000000376 reactant Substances 0.000 claims description 4
- 239000000499 gel Substances 0.000 description 38
- 150000002500 ions Chemical class 0.000 description 21
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 15
- -1 lithium hexafluorophosphate Chemical compound 0.000 description 15
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 14
- 229910013870 LiPF 6 Inorganic materials 0.000 description 13
- 239000008151 electrolyte solution Substances 0.000 description 12
- 238000005259 measurement Methods 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 150000001875 compounds Chemical class 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 229910052744 lithium Inorganic materials 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 239000011255 nonaqueous electrolyte Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 239000010439 graphite Substances 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 239000000017 hydrogel Substances 0.000 description 4
- 125000005647 linker group Chemical group 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- 239000008055 phosphate buffer solution Substances 0.000 description 4
- 229920002239 polyacrylonitrile Polymers 0.000 description 4
- 125000004206 2,2,2-trifluoroethyl group Chemical group [H]C([H])(*)C(F)(F)F 0.000 description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- JFDZBHWFFUWGJE-UHFFFAOYSA-N benzonitrile Chemical compound N#CC1=CC=CC=C1 JFDZBHWFFUWGJE-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010908 decantation Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 125000004185 ester group Chemical group 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000007983 Tris buffer Substances 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 239000007853 buffer solution Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- GAEKPEKOJKCEMS-UHFFFAOYSA-N gamma-valerolactone Chemical compound CC1CCC(=O)O1 GAEKPEKOJKCEMS-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000002608 ionic liquid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- ZMQDTYVODWKHNT-UHFFFAOYSA-N tris(2,2,2-trifluoroethyl) phosphate Chemical compound FC(F)(F)COP(=O)(OCC(F)(F)F)OCC(F)(F)F ZMQDTYVODWKHNT-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-BJUDXGSMSA-N (6Li)Lithium Chemical compound [6Li] WHXSMMKQMYFTQS-BJUDXGSMSA-N 0.000 description 1
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 description 1
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 1
- CAQYAZNFWDDMIT-UHFFFAOYSA-N 1-ethoxy-2-methoxyethane Chemical compound CCOCCOC CAQYAZNFWDDMIT-UHFFFAOYSA-N 0.000 description 1
- DRVMZMGCPWFDBI-UHFFFAOYSA-N 2,2,2-trifluoroethyl dihydrogen phosphate Chemical compound OP(O)(=O)OCC(F)(F)F DRVMZMGCPWFDBI-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- XXADTADLEPUVRJ-UHFFFAOYSA-N 2,2-difluoroethyl bis(2,2,2-trifluoroethyl) phosphate Chemical compound FC(F)COP(=O)(OCC(F)(F)F)OCC(F)(F)F XXADTADLEPUVRJ-UHFFFAOYSA-N 0.000 description 1
- OYOKPDLAMOMTEE-UHFFFAOYSA-N 4-chloro-1,3-dioxolan-2-one Chemical compound ClC1COC(=O)O1 OYOKPDLAMOMTEE-UHFFFAOYSA-N 0.000 description 1
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 1
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- JGFBQFKZKSSODQ-UHFFFAOYSA-N Isothiocyanatocyclopropane Chemical compound S=C=NC1CC1 JGFBQFKZKSSODQ-UHFFFAOYSA-N 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910013684 LiClO 4 Inorganic materials 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910010586 LiFeO 2 Inorganic materials 0.000 description 1
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 1
- 229910014689 LiMnO Inorganic materials 0.000 description 1
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- STSCVKRWJPWALQ-UHFFFAOYSA-N TRIFLUOROACETIC ACID ETHYL ESTER Chemical compound CCOC(=O)C(F)(F)F STSCVKRWJPWALQ-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
- 125000002252 acyl group Chemical group 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- VEZXCJBBBCKRPI-UHFFFAOYSA-N beta-propiolactone Chemical compound O=C1CCO1 VEZXCJBBBCKRPI-UHFFFAOYSA-N 0.000 description 1
- WLLOZRDOFANZMZ-UHFFFAOYSA-N bis(2,2,2-trifluoroethyl) carbonate Chemical compound FC(F)(F)COC(=O)OCC(F)(F)F WLLOZRDOFANZMZ-UHFFFAOYSA-N 0.000 description 1
- XBUGKDHALPQOTH-UHFFFAOYSA-N bis(2,2,2-trifluoroethyl) hydrogen phosphate Chemical compound FC(F)(F)COP(=O)(O)OCC(F)(F)F XBUGKDHALPQOTH-UHFFFAOYSA-N 0.000 description 1
- WOGKKRTZDXJOPJ-UHFFFAOYSA-N bis(2,2,3,3-tetrafluoropropyl) hydrogen phosphate Chemical compound FC(COP(OCC(C(F)F)(F)F)(O)=O)(C(F)F)F WOGKKRTZDXJOPJ-UHFFFAOYSA-N 0.000 description 1
- PWLNAUNEAKQYLH-UHFFFAOYSA-N butyric acid octyl ester Natural products CCCCCCCCOC(=O)CCC PWLNAUNEAKQYLH-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001244 carboxylic acid anhydrides Chemical group 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 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
- 239000006185 dispersion Substances 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- JDVCDTVFGALNDG-UHFFFAOYSA-N ethyl bis(2,2,2-trifluoroethyl) phosphate Chemical compound FC(F)(F)COP(=O)(OCC)OCC(F)(F)F JDVCDTVFGALNDG-UHFFFAOYSA-N 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- ACFSQHQYDZIPRL-UHFFFAOYSA-N lithium;bis(1,1,2,2,2-pentafluoroethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)C(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)C(F)(F)F ACFSQHQYDZIPRL-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 125000005439 maleimidyl group Chemical group C1(C=CC(N1*)=O)=O 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- QPXDTULTYTZDQM-UHFFFAOYSA-N methyl bis(2,2,2-trifluoroethyl) phosphate Chemical compound FC(F)(F)COP(=O)(OC)OCC(F)(F)F QPXDTULTYTZDQM-UHFFFAOYSA-N 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- UUIQMZJEGPQKFD-UHFFFAOYSA-N n-butyric acid methyl ester Natural products CCCC(=O)OC UUIQMZJEGPQKFD-UHFFFAOYSA-N 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 125000006501 nitrophenyl group Chemical group 0.000 description 1
- 125000005545 phthalimidyl group Chemical group 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920000131 polyvinylidene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- OOFFWYIDWYZSHA-UHFFFAOYSA-N propan-2-yl bis(2,2,2-trifluoroethyl) phosphate Chemical compound P(=O)(OCC(F)(F)F)(OCC(F)(F)F)OC(C)C OOFFWYIDWYZSHA-UHFFFAOYSA-N 0.000 description 1
- 229960000380 propiolactone Drugs 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
- 125000004205 trifluoroethyl group Chemical group [H]C([H])(*)C(F)(F)F 0.000 description 1
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- 239000001226 triphosphate Substances 0.000 description 1
- 235000011178 triphosphate Nutrition 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-N triphosphoric acid Chemical compound OP(O)(=O)OP(O)(=O)OP(O)(O)=O UNXRWKVEANCORM-UHFFFAOYSA-N 0.000 description 1
- OXFUXNFMHFCELM-UHFFFAOYSA-N tripropan-2-yl phosphate Chemical compound CC(C)OP(=O)(OC(C)C)OC(C)C OXFUXNFMHFCELM-UHFFFAOYSA-N 0.000 description 1
- RXPQRKFMDQNODS-UHFFFAOYSA-N tripropyl phosphate Chemical compound CCCOP(=O)(OCCC)OCCC RXPQRKFMDQNODS-UHFFFAOYSA-N 0.000 description 1
- ZDOOXJCSVYVMQL-UHFFFAOYSA-N tris(2,2,3,3,3-pentafluoropropyl) phosphate Chemical compound FC(F)(F)C(F)(F)COP(=O)(OCC(F)(F)C(F)(F)F)OCC(F)(F)C(F)(F)F ZDOOXJCSVYVMQL-UHFFFAOYSA-N 0.000 description 1
- YZQXAGZTJRSUJT-UHFFFAOYSA-N tris(2,2,3,3-tetrafluoropropyl) phosphate Chemical compound FC(F)C(F)(F)COP(=O)(OCC(F)(F)C(F)F)OCC(F)(F)C(F)F YZQXAGZTJRSUJT-UHFFFAOYSA-N 0.000 description 1
- BWKQKTMHHAZKLV-UHFFFAOYSA-N tris(2,2-difluoroethyl) phosphate Chemical compound FC(F)COP(=O)(OCC(F)F)OCC(F)F BWKQKTMHHAZKLV-UHFFFAOYSA-N 0.000 description 1
- ITHOCLGVILQYTN-UHFFFAOYSA-N tris(2-fluoroethyl) phosphate Chemical compound FCCOP(=O)(OCCF)OCCF ITHOCLGVILQYTN-UHFFFAOYSA-N 0.000 description 1
- CQXYINNETWHZTR-UHFFFAOYSA-N tritert-butyl phosphate Chemical compound CC(C)(C)OP(=O)(OC(C)(C)C)OC(C)(C)C CQXYINNETWHZTR-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
Description
及び下記一般式(2)
及び下記一般式(4)
作製したゲル電解質について、イオン伝導度の測定を行った。測定には交流インピーダンス法を用いた。装置にはエレクトロケミカルインターフェイス(東洋テクニカ; Solartron SI 1287)、周波数応答アナライザー(東洋テクニカ; Solartron SI 1260)を用いて、周波数100kHz〜0.1Hzまで、10mVの交流振幅、恒温槽を用いて5℃〜65℃の温度範囲で行った。測定セルには、対向したステンレス製円盤電極の間に内径10mm、厚さ1mmのポリテトラフルオロエチレン製スペーサーを挟んだ構造の2極式セルを使用し、スペーサーの大きさに合わせて整形したゲルをセル内に封入した。また、セルはグローブボックス中で構築した。セル定数はセル寸法から求めた理論値を用いた。
分子量20,000のTetraPEG−NH2とTetraPEG−NHSを50mg/mlの濃度で100mMのリン酸緩衝溶液(pH7.4)、クエン酸・リン酸緩衝溶液(pH5.8)を1/4に薄めた低濃度緩衝溶液にそれぞれ溶解した。なお、TetraPEG−NH2、TetraPEG−NHSのnの値は、モノマーの分子量換算で、n=114と算出することができる。また、TetraPEG−NHSが100mg/ml以上の場合は薄めずに使用した。得られた溶液を混合し、シリコンセパレーター(厚さ1mm)を貼ったガラスプレート平面上に展開し1日静地することでハイドロゲルを作製した。
電解液に1mol/LのLiPF6を溶解した、EC:DEC:トリス(2,2,2-トリフルオロエチル)フォスフェート(以下、TFEP)=53:27:20(v/v/v)を用いた以外は、実施例1と同様の方法でゲル電解質を作製した。得られたゲル電解質の高分子含量(wt%)は6.2wt%であった。
分子量20,000のTetraPEG−NH2とTetraPEG−NHSを50mg/mlの濃度で100mMのリン酸緩衝溶液(pH7.4)、クエン酸・リン酸緩衝溶液(pH5.8)を1/4に薄めた低濃度緩衝溶液にそれぞれ溶解した。なお、TetraPEG−NHSが100mg/ml以上の場合は薄めずに使用した。得られた溶液を混合し、シリコンセパレーター(厚さ1mm)を貼ったガラスプレート平面上に展開し1日静地することでハイドロゲルを作製した。
電解液に1mol/LのLiPF6を溶解した、EC:DEC:TFEP=53:27:20(v:v:v)を用いた以外は、実施例3と同様の方法でゲル電解質を作製した。得られたゲル電解質の高分子含量(wt%)は1.9wt%であった。
得られたゲル電解質のイオン伝導度の測定結果を表1に記す。
ポリフッ化ビニリデン−ヘキサフルオロプロピル共重合体(PVdF−HFP)パウダー5gに、1mol/LのLiPF6 EC:DEC=2:1(v:v)を溶解させて調製した電解液20gを50mlのビーカーに入れ、1時間攪拌した後、溶液をシャーレに移して400mmHgの減圧下、70℃で4 時間加熱することにより、厚さ1mmのゲル電解質を得た。
1mol/LのLiPF6を溶解したEC:DEC=2:1の電解液20gを65℃に加熱し、ポリアクリロニトリル(PAN)5gを添加した後、溶液をシャーレに移して10℃まで冷却し、厚さ1mmのゲル電解質を得た。
PVdF−HFPパウダー1gに、1mol/LのLiPF6 EC:DEC=2:1(v:v)を溶解させて調製した電解液20gを50mlのビーカーに入れ、比較例1と同様の方法で、ゲル電解質の作製を試みたが、自立性ゲルを調製することはできなかった。
1mol/LのLiPF6を溶解したEC:DEC=2:1の電解液20gを65℃に加熱し、ポリアクリロニトリル(PAN)1gを添加した後、溶液をシャーレに移して10℃まで冷却することでゲル電解質の作製を試みたが、自立性ゲルを調製することはできなかった。
実施例1、2に対して、比較例1〜4では公知の固体ポリマーゲルを用いて比較を行った例である。公知の固体ポリマーゲルの場合、少ないゲル濃度では自立性のゲルを作製することは難しいが、本発明の固体ポリマーゲルを用いると、少ないゲル濃度でも自立性のゲルを作製することができる。この効果はこれまでのポリマーゲルでは予想できない効果であり、当業者が容易に類推できるものではないと考えられる。
実施例1と実施例3では、異なる方法(乾燥法とデカンテーション法)で電解液を含浸させた例である。実施例3の方が実施例1に比べ明らかにゲル濃度が低下した。これは、乾燥工程を経ることで、高分子の網目構造が変性し、可逆性を失った結果、網目構造に含まれる電解液量が減少し、ゲル濃度が増加したものと考えている。
実施例1で作製したゲル電解質における黒鉛(KS6)負極の電池特性を、定電流充放電試験により評価した。測定には、セル別充放電電池試験システム(ナガノ(株)、BTS−2003W)を使用した。セルには2極式コイン型セル(2032型)を使用した。試験極には黒鉛電極(φ10mm)、対極にステンレスメッシュに張り付けたリチウム金属(φ15mm)を使用した。試験条件は、1/10Cレートに相当する電流密度を適用し、カットオフ電位は0V〜1.5Vで試験した。結果を図2に示す。
電解液に実施例2で作製したゲル電解質(1mol/LのLiPF6を溶解した、EC:DEC:TFEP=53:27:20(v:v:v))を用いた以外は、実施例5と同様の方法で充放電試験を行った。その結果を図3に示す。
2 銅箔製集電体
3 黒鉛電極ステンレス製キャップ
4 金属リチウム極ステンレス製キャップ
5 金属リチウム
6 ステンレスメッシュ製集電体
7 ステンレス製板バネ
8 ゲル電解質
9 ガスケット
Claims (5)
- 電解質塩、非水溶媒及びポリエチレングリコール骨格を有するポリマーを含み、当該ポリマーが、ポリエチレングリコール鎖の架橋により網目構造を有する非水系ゲル電解質であって、
前記ポリマーが、下記一般式(1)
及び下記一般式(2)
非水系ゲル電解質中の前記ポリマーの重量分率が0.1〜30%である、非水系ゲル電解質。 - 前記ポリマーが、下記一般式(3)
及び下記一般式(4)
- 非水溶媒が、鎖状カーボネートおよび/または環状カーボネートである請求項1または2に記載の非水系ゲル電解質。
- 非水溶媒が、下記一般式(5)
- 請求項1〜4のいずれか1項に記載の非水系ゲル電解質を含有する非水系ゲル電解質二次電池。
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