WO2018164130A1 - Additif pour électrolyte non aqueux, électrolyte non aqueux, et dispositif accumulateur de puissance - Google Patents
Additif pour électrolyte non aqueux, électrolyte non aqueux, et dispositif accumulateur de puissance Download PDFInfo
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- WO2018164130A1 WO2018164130A1 PCT/JP2018/008603 JP2018008603W WO2018164130A1 WO 2018164130 A1 WO2018164130 A1 WO 2018164130A1 JP 2018008603 W JP2018008603 W JP 2018008603W WO 2018164130 A1 WO2018164130 A1 WO 2018164130A1
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- aqueous electrolyte
- additive
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- compound
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- 239000011255 nonaqueous electrolyte Substances 0.000 title claims abstract description 107
- 239000000654 additive Substances 0.000 title claims abstract description 53
- 230000000996 additive effect Effects 0.000 title claims abstract description 49
- 150000001875 compounds Chemical class 0.000 claims abstract description 80
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 10
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 6
- 125000004430 oxygen atom Chemical group O* 0.000 claims abstract description 5
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims abstract description 4
- 125000001183 hydrocarbyl group Chemical group 0.000 claims abstract 6
- 239000008151 electrolyte solution Substances 0.000 claims description 41
- 125000004432 carbon atom Chemical group C* 0.000 claims description 39
- 125000005843 halogen group Chemical group 0.000 claims description 33
- 125000003118 aryl group Chemical group 0.000 claims description 28
- 125000000217 alkyl group Chemical group 0.000 claims description 24
- 230000005611 electricity Effects 0.000 claims description 20
- 239000003792 electrolyte Substances 0.000 claims description 20
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 15
- 229910001416 lithium ion Inorganic materials 0.000 claims description 15
- 229910003002 lithium salt Inorganic materials 0.000 claims description 13
- 159000000002 lithium salts Chemical class 0.000 claims description 13
- 125000003342 alkenyl group Chemical group 0.000 claims description 9
- 125000000304 alkynyl group Chemical group 0.000 claims description 8
- 239000003125 aqueous solvent Substances 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 7
- 150000005676 cyclic carbonates Chemical class 0.000 claims description 7
- 150000005678 chain carbonates Chemical class 0.000 claims description 6
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 claims description 6
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 125000001153 fluoro group Chemical group F* 0.000 claims description 3
- 125000000547 substituted alkyl group Chemical group 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 2
- 125000005017 substituted alkenyl group Chemical group 0.000 claims 1
- -1 sulphonyl group Chemical group 0.000 abstract description 126
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 abstract description 2
- 229940021013 electrolyte solution Drugs 0.000 description 28
- 229910052744 lithium Inorganic materials 0.000 description 21
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 21
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 20
- 239000010410 layer Substances 0.000 description 20
- QFLWZFQWSBQYPS-AWRAUJHKSA-N (3S)-3-[[(2S)-2-[[(2S)-2-[5-[(3aS,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoylamino]-3-methylbutanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-4-[1-bis(4-chlorophenoxy)phosphorylbutylamino]-4-oxobutanoic acid Chemical compound CCCC(NC(=O)[C@H](CC(O)=O)NC(=O)[C@H](Cc1ccc(O)cc1)NC(=O)[C@@H](NC(=O)CCCCC1SC[C@@H]2NC(=O)N[C@H]12)C(C)C)P(=O)(Oc1ccc(Cl)cc1)Oc1ccc(Cl)cc1 QFLWZFQWSBQYPS-AWRAUJHKSA-N 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 15
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 description 13
- 239000007773 negative electrode material Substances 0.000 description 12
- 239000007774 positive electrode material Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 239000007789 gas Substances 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 7
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 7
- 150000002430 hydrocarbons Chemical group 0.000 description 7
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 6
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 150000008065 acid anhydrides Chemical class 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- 239000012948 isocyanate Substances 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 125000001494 2-propynyl group Chemical group [H]C#CC([H])([H])* 0.000 description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 5
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 5
- 239000002033 PVDF binder Substances 0.000 description 5
- 229910052796 boron Inorganic materials 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 5
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 5
- 239000010452 phosphate Substances 0.000 description 5
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 5
- 230000001629 suppression Effects 0.000 description 5
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 4
- 229940122361 Bisphosphonate Drugs 0.000 description 4
- 229910013063 LiBF 4 Inorganic materials 0.000 description 4
- 229910013870 LiPF 6 Inorganic materials 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 125000003545 alkoxy group Chemical group 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 238000000425 proton nuclear magnetic resonance spectrum Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000002409 silicon-based active material Substances 0.000 description 4
- 239000002210 silicon-based material Substances 0.000 description 4
- BJWMSGRKJIOCNR-UHFFFAOYSA-N 4-ethenyl-1,3-dioxolan-2-one Chemical compound C=CC1COC(=O)O1 BJWMSGRKJIOCNR-UHFFFAOYSA-N 0.000 description 3
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 229910013716 LiNi Inorganic materials 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000000010 aprotic solvent Substances 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- AMXKVIWWXBYXRS-UHFFFAOYSA-N 1,1-dioxothiolan-3-ol Chemical compound OC1CCS(=O)(=O)C1 AMXKVIWWXBYXRS-UHFFFAOYSA-N 0.000 description 2
- FSSPGSAQUIYDCN-UHFFFAOYSA-N 1,3-Propane sultone Chemical compound O=S1(=O)CCCO1 FSSPGSAQUIYDCN-UHFFFAOYSA-N 0.000 description 2
- 125000004206 2,2,2-trifluoroethyl group Chemical group [H]C([H])(*)C(F)(F)F 0.000 description 2
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical class 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 2
- 125000004198 2-fluorophenyl group Chemical group [H]C1=C([H])C(F)=C(*)C([H])=C1[H] 0.000 description 2
- 125000004180 3-fluorophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C(F)=C1[H] 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- 125000001255 4-fluorophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C([H])=C1F 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- BTGRAWJCKBQKAO-UHFFFAOYSA-N adiponitrile Chemical compound N#CCCCCC#N BTGRAWJCKBQKAO-UHFFFAOYSA-N 0.000 description 2
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 2
- 125000002521 alkyl halide group Chemical group 0.000 description 2
- 125000002947 alkylene group Chemical group 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 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 2
- 238000004364 calculation method Methods 0.000 description 2
- 150000001721 carbon Chemical group 0.000 description 2
- 125000005708 carbonyloxy group Chemical group [*:2]OC([*:1])=O 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000004292 cyclic ethers Chemical class 0.000 description 2
- PFURGBBHAOXLIO-UHFFFAOYSA-N cyclohexane-1,2-diol Chemical compound OC1CCCCC1O PFURGBBHAOXLIO-UHFFFAOYSA-N 0.000 description 2
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 description 2
- 229910052736 halogen Chemical class 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 150000003951 lactams Chemical class 0.000 description 2
- 150000002596 lactones Chemical class 0.000 description 2
- IGILRSKEFZLPKG-UHFFFAOYSA-M lithium;difluorophosphinate Chemical compound [Li+].[O-]P(F)(F)=O IGILRSKEFZLPKG-UHFFFAOYSA-M 0.000 description 2
- DCWYVUZDHJMHRQ-UHFFFAOYSA-M lithium;ethyl sulfate Chemical compound [Li+].CCOS([O-])(=O)=O DCWYVUZDHJMHRQ-UHFFFAOYSA-M 0.000 description 2
- ALYPSPRNEZQACK-UHFFFAOYSA-M lithium;methyl sulfate Chemical compound [Li+].COS([O-])(=O)=O ALYPSPRNEZQACK-UHFFFAOYSA-M 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- BHIWKHZACMWKOJ-UHFFFAOYSA-N methyl isobutyrate Chemical compound COC(=O)C(C)C BHIWKHZACMWKOJ-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004776 molecular orbital Methods 0.000 description 2
- 125000001624 naphthyl group Chemical group 0.000 description 2
- 150000002825 nitriles Chemical class 0.000 description 2
- 125000005702 oxyalkylene group Chemical group 0.000 description 2
- 125000005062 perfluorophenyl group Chemical group FC1=C(C(=C(C(=C1F)F)F)F)* 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000003223 protective agent Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 125000001424 substituent group Chemical group 0.000 description 2
- 125000004426 substituted alkynyl group Chemical group 0.000 description 2
- 125000003107 substituted aryl group Chemical group 0.000 description 2
- IAHFWCOBPZCAEA-UHFFFAOYSA-N succinonitrile Chemical compound N#CCCC#N IAHFWCOBPZCAEA-UHFFFAOYSA-N 0.000 description 2
- QAHVHSLSRLSVGS-UHFFFAOYSA-N sulfamoyl chloride Chemical compound NS(Cl)(=O)=O QAHVHSLSRLSVGS-UHFFFAOYSA-N 0.000 description 2
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 2
- 150000003457 sulfones Chemical class 0.000 description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
- 125000003944 tolyl group Chemical group 0.000 description 2
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 2
- 125000005023 xylyl group Chemical group 0.000 description 2
- AOSZTAHDEDLTLQ-AZKQZHLXSA-N (1S,2S,4R,8S,9S,11S,12R,13S,19S)-6-[(3-chlorophenyl)methyl]-12,19-difluoro-11-hydroxy-8-(2-hydroxyacetyl)-9,13-dimethyl-6-azapentacyclo[10.8.0.02,9.04,8.013,18]icosa-14,17-dien-16-one Chemical compound C([C@@H]1C[C@H]2[C@H]3[C@]([C@]4(C=CC(=O)C=C4[C@@H](F)C3)C)(F)[C@@H](O)C[C@@]2([C@@]1(C1)C(=O)CO)C)N1CC1=CC=CC(Cl)=C1 AOSZTAHDEDLTLQ-AZKQZHLXSA-N 0.000 description 1
- SZUVGFMDDVSKSI-WIFOCOSTSA-N (1s,2s,3s,5r)-1-(carboxymethyl)-3,5-bis[(4-phenoxyphenyl)methyl-propylcarbamoyl]cyclopentane-1,2-dicarboxylic acid Chemical compound O=C([C@@H]1[C@@H]([C@](CC(O)=O)([C@H](C(=O)N(CCC)CC=2C=CC(OC=3C=CC=CC=3)=CC=2)C1)C(O)=O)C(O)=O)N(CCC)CC(C=C1)=CC=C1OC1=CC=CC=C1 SZUVGFMDDVSKSI-WIFOCOSTSA-N 0.000 description 1
- IWZSHWBGHQBIML-ZGGLMWTQSA-N (3S,8S,10R,13S,14S,17S)-17-isoquinolin-7-yl-N,N,10,13-tetramethyl-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-amine Chemical compound CN(C)[C@H]1CC[C@]2(C)C3CC[C@@]4(C)[C@@H](CC[C@@H]4c4ccc5ccncc5c4)[C@@H]3CC=C2C1 IWZSHWBGHQBIML-ZGGLMWTQSA-N 0.000 description 1
- 125000006002 1,1-difluoroethyl group Chemical group 0.000 description 1
- AVPYLKIIPLFMHQ-UHFFFAOYSA-N 1,2,6-oxadithiane 2,2,6,6-tetraoxide Chemical compound O=S1(=O)CCCS(=O)(=O)O1 AVPYLKIIPLFMHQ-UHFFFAOYSA-N 0.000 description 1
- ZKGIQGUWLGYKMA-UHFFFAOYSA-N 1,2-bis(ethenylsulfonyl)ethane Chemical compound C=CS(=O)(=O)CCS(=O)(=O)C=C ZKGIQGUWLGYKMA-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
- ZPFAVCIQZKRBGF-UHFFFAOYSA-N 1,3,2-dioxathiolane 2,2-dioxide Chemical compound O=S1(=O)OCCO1 ZPFAVCIQZKRBGF-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
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 1
- ALQLPWJFHRMHIU-UHFFFAOYSA-N 1,4-diisocyanatobenzene Chemical compound O=C=NC1=CC=C(N=C=O)C=C1 ALQLPWJFHRMHIU-UHFFFAOYSA-N 0.000 description 1
- OVBFMUAFNIIQAL-UHFFFAOYSA-N 1,4-diisocyanatobutane Chemical compound O=C=NCCCCN=C=O OVBFMUAFNIIQAL-UHFFFAOYSA-N 0.000 description 1
- GWAOOGWHPITOEY-UHFFFAOYSA-N 1,5,2,4-dioxadithiane 2,2,4,4-tetraoxide Chemical compound O=S1(=O)CS(=O)(=O)OCO1 GWAOOGWHPITOEY-UHFFFAOYSA-N 0.000 description 1
- QUPKOUOXSNGVLB-UHFFFAOYSA-N 1,8-diisocyanatooctane Chemical compound O=C=NCCCCCCCCN=C=O QUPKOUOXSNGVLB-UHFFFAOYSA-N 0.000 description 1
- ONBQEOIKXPHGMB-VBSBHUPXSA-N 1-[2-[(2s,3r,4s,5r)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]oxy-4,6-dihydroxyphenyl]-3-(4-hydroxyphenyl)propan-1-one Chemical compound O[C@@H]1[C@H](O)[C@@H](CO)O[C@H]1OC1=CC(O)=CC(O)=C1C(=O)CCC1=CC=C(O)C=C1 ONBQEOIKXPHGMB-VBSBHUPXSA-N 0.000 description 1
- UNILWMWFPHPYOR-KXEYIPSPSA-M 1-[6-[2-[3-[3-[3-[2-[2-[3-[[2-[2-[[(2r)-1-[[2-[[(2r)-1-[3-[2-[2-[3-[[2-(2-amino-2-oxoethoxy)acetyl]amino]propoxy]ethoxy]ethoxy]propylamino]-3-hydroxy-1-oxopropan-2-yl]amino]-2-oxoethyl]amino]-3-[(2r)-2,3-di(hexadecanoyloxy)propyl]sulfanyl-1-oxopropan-2-yl Chemical compound O=C1C(SCCC(=O)NCCCOCCOCCOCCCNC(=O)COCC(=O)N[C@@H](CSC[C@@H](COC(=O)CCCCCCCCCCCCCCC)OC(=O)CCCCCCCCCCCCCCC)C(=O)NCC(=O)N[C@H](CO)C(=O)NCCCOCCOCCOCCCNC(=O)COCC(N)=O)CC(=O)N1CCNC(=O)CCCCCN\1C2=CC=C(S([O-])(=O)=O)C=C2CC/1=C/C=C/C=C/C1=[N+](CC)C2=CC=C(S([O-])(=O)=O)C=C2C1 UNILWMWFPHPYOR-KXEYIPSPSA-M 0.000 description 1
- 125000004973 1-butenyl group Chemical group C(=CCC)* 0.000 description 1
- 125000004972 1-butynyl group Chemical group [H]C([H])([H])C([H])([H])C#C* 0.000 description 1
- OYTMCDCWKVWQET-UHFFFAOYSA-N 1-ethenylsulfonyl-2-(2-ethenylsulfonylethoxy)ethane Chemical compound C=CS(=O)(=O)CCOCCS(=O)(=O)C=C OYTMCDCWKVWQET-UHFFFAOYSA-N 0.000 description 1
- 125000004776 1-fluoroethyl group Chemical group [H]C([H])([H])C([H])(F)* 0.000 description 1
- 125000000530 1-propynyl group Chemical group [H]C([H])([H])C#C* 0.000 description 1
- 238000005160 1H NMR spectroscopy Methods 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
- KMPBCFZCRNKXSA-UHFFFAOYSA-N 2,2,4,4,6,6-hexaethyl-1,3,5,2,4,6-trioxatrisilinane Chemical compound CC[Si]1(CC)O[Si](CC)(CC)O[Si](CC)(CC)O1 KMPBCFZCRNKXSA-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- 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
- H01G11/04—Hybrid capacitors
- H01G11/06—Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
-
- 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
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- 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
- H01G11/62—Liquid electrolytes characterised by the solute, e.g. salts, anions or cations therein
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- 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
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—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
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- 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
Definitions
- the present invention relates to an additive for non-aqueous electrolyte, a non-aqueous electrolyte, and an electricity storage device.
- Lithium ion batteries have high working voltage and energy density, and are therefore used as power sources for notebook computers and mobile phones. Since lithium ion batteries have a higher energy density than lead batteries and nickel cadmium batteries, realization of higher capacity of the batteries is expected.
- the lithium ion battery has a problem that the capacity of the battery decreases as the charge / discharge cycle progresses.
- the cause of the decrease in capacity is, for example, the decomposition of the electrolyte solution due to the electrode reaction, the decrease in the impregnation property of the electrolyte into the electrode active material layer, and the decrease in the lithium ion intercalation efficiency with a long charge / discharge cycle. It is thought that this is caused by
- a method of adding various additives to an electrolytic solution has been studied as a method for suppressing a decrease in battery capacity associated with a charge / discharge cycle.
- Additives are generally decomposed during the first charge and discharge to form a film called a solid electrolyte interface (SEI) on the electrode surface. Since the SEI is formed in the first charge / discharge cycle, lithium ions can move back and forth through the SEI while suppressing the consumption of electricity for the decomposition of the electrolyte during the subsequent charge / discharge. That is, it is considered that the formation of SEI plays a major role in suppressing the deterioration of the secondary battery when the charge / discharge cycle is repeated and improving the battery characteristics, storage characteristics, load characteristics, and the like.
- SEI solid electrolyte interface
- Patent Documents 1 to 3 examples of the additive for the electrolyte include cyclic monosulfonic acid esters in Patent Documents 1 to 3, sulfur-containing aromatic compounds in Patent Document 4, disulfide compounds in Patent Document 5, and disulfonic acid in Patent Documents 6 to 9. Each ester is disclosed.
- Patent Documents 10 to 15 disclose electrolytic solutions containing cyclic carbonates or cyclic sulfones.
- a compound having a low lowest unoccupied molecular orbital (LUMO) energy is an excellent electron acceptor and is considered to be able to form a stable SEI on the surface of an electrode such as a nonaqueous electrolyte secondary battery (for example, non Patent Document 1).
- LUMO lowest unoccupied molecular orbital
- Patent Documents 1 to 9 Although some of the conventional additives disclosed in Patent Documents 1 to 9 exhibit low LUMO energy, they have a problem that they are chemically unstable and easily deteriorate due to the influence of moisture and temperature. For example, although disulfonic acid ester shows low LUMO energy, it has low stability to moisture and easily deteriorates. Therefore, when it is stored for a long period of time, strict moisture content and temperature management are required. In general, the lithium ion battery is required to have a heat resistant temperature of about 60 ° C. and the lithium ion capacitor is about 80 ° C. Therefore, the improvement of the non-aqueous electrolyte additive used in the electricity storage device at high temperature is It was one of the important issues.
- the electrolyte solutions described in Patent Documents 10 to 14 can suppress irreversible capacity reduction to some extent by SEI generated on the negative electrode surface by electrochemical reductive decomposition.
- SEI formed by the additive in these electrolytes is excellent in the performance of protecting the electrode, it is not sufficient in terms of strength to withstand long-term use. Therefore, there is a problem that SEI is decomposed during use of the electricity storage device or a crack is generated in the SEI to expose the negative electrode surface, resulting in decomposition of the electrolytic solution and deterioration of battery characteristics.
- the electrolyte solution using an ethylene carbonate compound described in Patent Document 15 as an additive generates a gas such as carbon dioxide when ethylene carbonate is decomposed on the electrode, leading to a decrease in battery performance. Had a problem.
- the gas generation is particularly remarkable when a charge / discharge cycle is repeated at a high temperature or for a long time.
- the present invention provides a non-aqueous electrolyte additive that has high storage stability and enables improvement of cycle characteristics and suppression of gas generation with respect to an electricity storage device.
- the present inventors have found that a compound containing a specific structure exhibits low LUMO energy and is chemically stable. Furthermore, the present inventors can obtain excellent cycle characteristics and suppress gas generation when the compound is used as an additive for a non-aqueous electrolyte in an electricity storage device such as a non-aqueous electrolyte secondary battery. As a result, the present invention has been completed.
- this invention provides the additive for non-aqueous electrolyte containing the compound represented by following formula (1).
- X represents a sulfonyl group or a carbonyl group
- R 1 and R 2 each independently represents a hydrogen atom, an optionally substituted alkyl group having 1 to 4 carbon atoms, or an optionally substituted group.
- the compound represented by the formula (1) is a cyclic sulfone compound. Since the cyclic sulfone compound can cause ring-opening polymerization, it is considered to form strong SEI. Furthermore, the compound of the formula (1) containing a carbonyloxy group or a sulfonyloxy group bonded to the ring is considered to exhibit low LUMO energy and exhibit excellent ionic conductivity. Therefore, it is considered that the compound of the formula (1) can form a stable SEI that can withstand long-term use.
- an additive for non-aqueous electrolyte that has high storage stability and enables improvement of cycle characteristics and suppression of gas generation with respect to an electricity storage device.
- the additive for non-aqueous electrolyte according to the present invention forms a stable SEI (solid electrolyte interface) on the electrode surface when used in an electricity storage device such as a non-aqueous electrolyte secondary battery or an electric double layer capacitor.
- SEI solid electrolyte interface
- the additive for nonaqueous electrolysis according to the present embodiment contains one or more compounds represented by the following formula (1).
- X represents a sulfonyl group or a carbonyl group
- R 1 and R 2 each independently represents a hydrogen atom, an optionally substituted alkyl group having 1 to 4 carbon atoms, or an optionally substituted group.
- a in the formula (1) may be an alkylene group having 1 to 3 carbon atoms substituted with a halogen atom, or an oxyalkylene group having 1 to 3 carbon atoms which may be substituted with a halogen atom.
- the oxygen atom in the oxyalkylene group may be bonded to the sulfonyl group in the formula (1).
- the hydrocarbon group (particularly an alkylene group) contained in A may have 1 or 2 carbon atoms. Specific examples of A, -CH 2 -, - CH 2 CH 2 -, - CH 2 CH 2 CH 2 -, - CFHCH 2 -, - CF 2 CH 2 -, - OCH 2 -, and -OCH 2 CH 2- .
- a carbonyloxy group or a sulfonyloxy group may be bonded to the 3-position of the cyclic sulfone. This compound tends to exhibit particularly low LUMO energy and better ionic conductivity.
- the compound of the formula (1) may be a compound represented by the following formula (1a) or (1b).
- X in the formulas (1), (1) ′, (1a) and (1b) may be a sulfonyl group from the viewpoint of lower battery resistance and further suppression of gas generation. That is, the compound of the formula (1) may be a compound represented by the following formula (2a) or (2b).
- R 1 and R 2 in formulas (1), (1) ′, (1a), (1b), (2a) and (2b), an alkyl group having 1 to 4 carbon atoms and an alkenyl group having 2 to 4 carbon atoms Group when the alkynyl group having 2 to 4 carbon atoms is substituted, the substituent is, for example, a halogen atom, an aryl group, a halogenated aryl group (for example, 2-fluorophenyl group, 3-fluorophenyl group, 4 A fluorinated aryl group such as a fluorophenyl group or a perfluorophenyl group), an alkoxy group, a halogenated alkoxy group, or a combination thereof.
- a halogen atom for example, 2-fluorophenyl group, 3-fluorophenyl group, 4 A fluorinated aryl group such as a fluorophenyl group or a perfluorophenyl group
- R 1 and R 2 when the aryl group is substituted, the substituent is, for example, a halogen atom, an alkyl group, a halogenated alkyl group (for example, a trifluoromethyl group, 2,2,2-trifluoroethyl) A fluorinated alkyl group such as a group), an alkoxy group, a halogenated alkoxy group, or a combination thereof.
- R 1 and R 2 are each independently a C 1-4 alkyl group optionally substituted with a halogen atom, an aryl group or a halogenated aryl group, or a carbon optionally substituted with a halogen atom.
- R 1 and R 2 in the formulas (1), (1) ′, (1a), (1b), (2a) and (2b) are each independently a hydrogen atom from the viewpoint of lowering battery resistance.
- An alkyl group having 1 to 4 carbon atoms which may be substituted with a halogen atom, an aryl group or a halogenated aryl group, an alkynyl group having 2 to 4 carbon atoms which may be substituted with a halogen atom, or a halogen atom It may be an aryl group which may be substituted with an alkyl group or an alkyl halide group.
- R 1 and R 2 in formulas (1), (1) ′, (1a), (1b), (2a) and (2b) contain groups in which the compounds represented by these formulas have an unsaturated bond
- each independently a hydrogen atom, an alkenyl group having 2 to 4 carbon atoms that may be substituted with a halogen atom, or 2 to 2 carbon atoms that may be substituted with a halogen atom. It may be an alkynyl group of 4 or an aryl group optionally substituted with a halogen atom, an alkyl group or a halogenated alkyl group.
- the alkyl group having 1 to 4 carbon atoms may be, for example, a methyl group , Ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, and t-butyl group.
- a methyl group or an isopropyl group can be selected. These may be substituted with a halogen atom, an aryl group or a halogenated aryl group.
- Examples of the aryl group bonded to the alkyl group having 1 to 4 carbon atoms include a phenyl group, a tolyl group, a xylyl group, and a naphthyl group.
- Examples of the alkyl group having 1 to 4 carbon atoms substituted with a halogen atom, an aryl group or a halogenated aryl group include benzyl group, trifluoromethyl group, 1-fluoroethyl group, 2-fluoroethyl group, 1,1 -Difluoroethyl group, 1,2-difluoroethyl group, 2,2-difluoroethyl group, 2,2,2-trifluoroethyl group, perfluoroethyl group, 1-fluoro-n-propyl group, 2-fluoro- n-propyl group, 3-fluoro-n-propyl group, 1,1-difluoro-n-propyl group, 1,
- R 1 and R 2 in formulas (1), (1) ′, (1a), (1b), (2a) and (2b) have 2 to 4 carbon atoms which may be substituted with the halogen atom
- alkenyl group examples include vinyl group, allyl group, 2-propenyl group, isopropenyl group, 1-butenyl group, 2-butenyl group, 3-butenyl group, isobutenyl group, 1-fluorovinyl group, 2-fluorovinyl.
- alkenyl group having 2 to 4 carbon atoms an allyl group or a 2-propenyl group can be selected.
- R 1 and R 2 in formulas (1), (1) ′, (1a), (1b), (2a) and (2b) have 2 to 4 carbon atoms which may be substituted with the halogen atom
- alkynyl group examples include 1-propynyl group, 2-propynyl group, 1-butynyl group, 2-butynyl group, 3-butynyl group, 3-fluoro-1-propynyl group, and 3,3-difluoro-1-propynyl.
- R 1 and R 2 in formulas (1), (1) ′, (1a), (1b), (2a) and (2b) are substituted with the halogen atom, alkyl group or halogenated alkyl group.
- the aryl group that may be used include phenyl group, tolyl group, xylyl group, naphthyl group, 2-fluorophenyl group, 3-fluorophenyl group, 4-fluorophenyl group, 2,3-difluorophenyl group, 2,4 -Difluorophenyl group, 3,5-difluorophenyl group, 2,4,6-trifluorophenyl group, perfluorophenyl group, 3-fluoro-2-methylphenyl group, 4-fluoro-2-methylphenyl group, 5 -Fluoro-2-methylphenyl group, 6-fluoro-2-methylphenyl group, 2-fluoro-3-methylphenyl group, 4-fluoro-3-methylphenyl Group, 5-
- the halogen atom include an iodine atom, a bromine atom, and a fluorine atom. From the viewpoint that battery resistance tends to be lower, a fluorine atom can be selected as the halogen atom.
- R 1 and R 2 in the formulas (1), (1) ′, (1a), (1b), (2a) and (2b) are more excellent in ionic conductivity of the compounds represented by these formulas.
- each independently may be a hydrogen atom or an alkyl group having 1 to 4 carbon atoms which may be substituted with a halogen atom, an aryl group or a halogenated aryl group.
- R 1 and R 2 in the formulas (1), (1) ′, (1a), (1b), (2a) and (2b) are each independently from the viewpoint of improving cycle characteristics and suppressing gas generation.
- An alkyl group having 1 to 4 carbon atoms which may be substituted with a halogen atom, an aryl group or a halogenated aryl group, an alkenyl group having 2 to 4 carbon atoms which may be substituted with a halogen atom, or a halogen atom It may be an aryl group which may be substituted with an alkyl group or an alkyl halide group.
- Examples of the compound represented by the formula (1) include the following formulas (11), (12), (13), (14), (15), (16), (17), (18), (19 ), (20), (21), (22), (23) or (24).
- Ph represents a phenyl group
- n represents an integer of 1 to 5.
- the compound of formula (1) exhibits low LUMO energy and is susceptible to electrochemical reduction. Therefore, non-aqueous electrolytes containing these as additives for non-aqueous electrolytes form stable SEI on the electrode surface when used in power storage devices such as non-aqueous electrolyte secondary batteries and cycle. Battery characteristics such as characteristics, charge / discharge capacity, and internal resistance can be improved. Moreover, since the compound of Formula (1) is stable with respect to moisture and temperature changes, the additive for nonaqueous electrolyte and nonaqueous electrolyte containing them can be stored at room temperature for a long time. is there.
- the lowest unoccupied molecular orbital (LUMO) energy of the compound represented by the formula (1) may be ⁇ 3.0 eV or more, or 0.0 eV or less.
- LUMO energy When the LUMO energy is ⁇ 3.0 eV or more, SEI showing high resistance is hardly formed on the negative electrode due to excessive decomposition of the compound.
- the LUMO energy When the LUMO energy is 0.0 eV or less, more stable SEI can be more easily formed on the negative electrode surface.
- the LUMO energy may be ⁇ 2.0 eV or more, or ⁇ 0.1 eV or less.
- lowest unoccupied molecular orbital (LUMO) energy is a value calculated by combining the semi-empirical molecular orbital calculation method PM3 and the density functional method B3LYP method. Specifically, LUMO energy can be calculated using Gaussian 03 (Revision B.03, software manufactured by Gaussian, USA).
- the compound of formula (1) can be synthesized by combining the usual reactions using available raw materials.
- the compound of formula (1a) which is one of the specific examples, can be synthesized by a method of reacting 3-hydroxysulfolane with a halide such as sulfamoyl chloride.
- the additive for non-aqueous electrolyte according to this embodiment may contain the compound represented by the formula (1) alone or may contain two or more kinds.
- the compound represented by the formula (1) may be used in combination with other general components as long as the effect of the present invention is not significantly inhibited.
- Examples of other general components include a negative electrode protective agent, a positive electrode protective agent, a flame retardant, and an overcharge preventing agent.
- the non-aqueous electrolyte according to the present embodiment contains the additive for non-aqueous electrolyte, a non-aqueous solvent, and an electrolyte.
- the content of the additive for nonaqueous electrolyte (or the compound represented by formula (1)) in this nonaqueous electrolyte is 0.005% by mass or more based on the total mass of the nonaqueous electrolyte. Or 10% by mass or less. When the content is 0.005% by mass or more, stable SEI is easily formed by an electrochemical reaction on the electrode surface. When the content is 10% by mass or less, the non-aqueous electrolyte additive can be easily dissolved in the non-aqueous solvent.
- the content of the non-aqueous electrolyte additive may be 0.01% by mass or more, or 0.1% by mass or more. It may be 0.5% by mass or more. From the same viewpoint, the content of the additive for non-aqueous electrolyte (or the compound represented by the formula (1)) may be 5% by mass or less, or 2.0% by mass or less.
- the additive for non-aqueous electrolyte (the compound represented by the formula (1)) according to this embodiment may be used in combination with another compound that forms SEI.
- Other compounds that form SEI include cyclic carbonate compounds, nitrile compounds, isocyanate compounds, C ⁇ C group-containing compounds, SO group-containing compounds, phosphorus-containing compounds, acid anhydrides, cyclic phosphazene compounds, boron-containing compounds, and silicon. Examples thereof include compounds.
- cyclic carbonate compound examples include 4-fluoro-1,3-dioxolan-2-one (FEC), trans or cis-4,5-difluoro-1,3-dioxolan-2-one (DFEC), vinylene carbonate ( VC), vinyl ethylene carbonate (VEC), 4-ethynyl-1,3-dioxolan-2-one (EEC), and the like.
- FEC 4-fluoro-1,3-dioxolan-2-one
- DFEC trans or cis-4,5-difluoro-1,3-dioxolan-2-one
- VC vinylene carbonate
- VEC vinyl ethylene carbonate
- EEC 4-ethynyl-1,3-dioxolan-2-one
- nitrile compound examples include acetonitrile, propionitrile, succinonitrile, glutaronitrile, adiponitrile, pimelonitrile, suberonitrile, and sebaconitrile.
- succinonitrile, adiponitrile, or a combination thereof may be used.
- isocyanate compound examples include methyl isocyanate, ethyl isocyanate, butyl isocyanate, phenyl isocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate, octamethylene diisocyanate, 1,4-phenylene diisocyanate, 2-isocyanatoethyl acrylate, and 2-isocyanatoethyl. And methacrylate.
- Examples of the C ⁇ C group-containing compound include 2-propynyl methyl carbonate, 2-propynyl acetate, 2-propynyl formate, 2-propynyl methacrylate, 2-propynyl methanesulfonate, and 2-propynyl vinyl sulfonate.
- Examples include 2-butyne-1,4-diyldimethanesulfonate, 2-butyne-1,4-diyldiformate, and 2,4-hexadiyne-1,6-diyldimethanesulfonate.
- SO group-containing compound examples include 1,3-propane sultone (PS), 1,3-butane sultone, 2,4-butane sultone, 1,4-butane sultone, 1,3-propene sultone, 2,2-dioxide-1 , 2-oxathiolan-4-yl acetate, 5,5-dimethyl-1,2-oxathiolan-4-one 2,2-dioxide, etc., sultone, ethylene sulfite, ethylene sulfate, hexahydrobenzo [1,3 , 2] dioxathiolane-2-oxide (also referred to as 1,2-cyclohexanediol cyclic sulfite) and cyclic sulfites such as 5-vinyl-hexahydro-1,3,2-benzodioxathiol-2-oxide, Butane-2,3-diyldimethanesulfonate, butan
- Examples of the phosphorus-containing compound include trimethyl phosphate, tributyl phosphate, and trioctyl phosphate, tris (2,2,2-trifluoroethyl) phosphate, bis (2,2,2-trifluoroethyl) methyl phosphate, Bis (2,2,2-trifluoroethyl) phosphate, bis (2,2,2-trifluoroethyl) phosphate, 2,2-difluoroethyl phosphate, bis (2,2,2-trifluoroethyl phosphate) ) 2,2,3,3-tetrafluoropropyl, bis (2,2-difluoroethyl) phosphate 2,2,2-trifluoroethyl, bis (2,2,3,3-tetrafluoropropyl) phosphate 2,2,2-trifluoroethyl and phosphoric acid (2,2,2-trifluoroethyl) (2,2,3,3-tetrafluoropropyl)
- acid anhydride examples include acetic anhydride, propionic anhydride, succinic anhydride, maleic anhydride, 3-allyl succinic anhydride, glutaric anhydride, itaconic anhydride, and 3-sulfo-propionic anhydride.
- Examples of the cyclic phosphazene compound include methoxypentafluorocyclotriphosphazene, ethoxypentafluorocyclotriphosphazene, phenoxypentafluorocyclotriphosphazene, and ethoxyheptafluorocyclotetraphosphazene.
- Examples of the compound having a silicon atom include hexamethylcyclotrisiloxane, hexaethylcyclotrisiloxane, hexaphenylcyclotrisiloxane, 1,3,5-trimethyl-1,3,5-trivinylcyclotrisiloxane, octamethylcyclotrisiloxane.
- Tetrasiloxane decamethylcyclopentasiloxane, trimethylfluorosilane, triethylfluorosilane, tripropylfluorosilane, phenyldimethylfluorosilane, triphenylfluorosilane, vinyldimethylfluorosilane, vinyldiethylfluorosilane, vinyldiphenylfluorosilane, trimethoxyfluoro Silane, triethoxyfluorosilane, dimethyldifluorosilane, diethyldifluorosilane, divinyldifluorosilane, ethylvinyldifluor Silane, methyl trifluorosilane, ethyl trifluorosilane, hexamethyldisiloxane, 1,3-diethyltetramethyldisiloxane, hexaethyldisiloxane, octamethyltrisiloxane, methoxytri
- Examples of the compound having a boron atom include boroxine, trimethylboroxine, trimethoxyboroxine, triethylboroxine, triethoxyboroxine, triisopropylboroxine, triisopropoxyboroxine, tri-n-propylboroxine, tri-n- Examples include propoxyboroxine, tri-n-butylboroxine, tri-n-butyloxyboroxine, triphenylboroxine, triphenoxyboroxine, tricyclohexylboroxine, and tricyclohexoxyboroxine.
- the content of the cyclic carbonate compound is 0.001 to 10% by mass based on the total mass of the non-aqueous electrolyte. May be. When the content of the cyclic carbonate compound is within this range, the SEI does not become too thick, and the stability of the SEI at a higher temperature increases.
- the content of the cyclic carbonate compound may be 0.01% by mass or more, or 0.5% by mass or more based on the total mass of the nonaqueous electrolytic solution.
- the content of the nitrile compound may be 0.001 to 10% by mass based on the total mass of the non-aqueous electrolyte. Good. When the content of the nitrile compound is within this range, the SEI does not become too thick, and the stability of the SEI at a higher temperature increases.
- the content of the nitrile compound may be 0.01% by mass or more, or 0.5% by mass or more based on the total mass of the nonaqueous electrolytic solution.
- the content of the isocyanate compound may be 0.01 to 5% by mass based on the total mass of the non-aqueous electrolyte. Good. When the content of the isocyanate compound is within this range, the SEI does not become too thick, and the stability of the SEI at higher temperatures increases.
- the content of the isocyanate compound may be 0.5% by mass or more or 3% by mass or less based on the total mass of the nonaqueous electrolytic solution.
- the content of the C ⁇ C group-containing compound is 0.01 based on the total mass of the non-aqueous electrolyte. It may be up to 5% by weight. When the content of the C ⁇ C group-containing compound is within this range, the SEI does not become too thick, and the stability of the SEI at higher temperatures increases.
- the content of the C ⁇ C group-containing compound may be 0.1% by mass or more based on the total mass of the nonaqueous electrolytic solution.
- the content of the SO group-containing compound is 0.001 to 5% by mass based on the total mass of the non-aqueous electrolyte. It may be. When the content of the SO group-containing compound is within this range, the SEI does not become too thick, and the stability of the SEI at higher temperatures increases.
- the content of the SO group-containing compound may be 0.01% by mass or more, or 0.1% by mass or more based on the total mass of the non-aqueous electrolyte.
- the content of the phosphorus-containing compound is 0.001 to 5% by mass based on the total mass of the nonaqueous electrolytic solution. May be. When the content of the phosphorus-containing compound is within this range, the SEI does not become too thick, and the stability of the SEI at higher temperatures increases.
- the content of the phosphorus-containing compound may be 0.01% by mass or more, or 0.1% by mass or more based on the total mass of the nonaqueous electrolytic solution.
- the content of the cyclic phosphazene compound is 0.001 to 5% by mass based on the total mass of the non-aqueous electrolyte. May be.
- the content of the cyclic phosphazene compound is within this range, the SEI does not become too thick, and the stability of the SEI at a higher temperature increases.
- the content of the cyclic phosphazene compound may be 0.01% by mass or more, or 0.1% by mass or more based on the total mass of the nonaqueous electrolytic solution.
- the content of the acid anhydride is 0.001 to 5% by mass based on the total mass of the non-aqueous electrolyte. May be. When the content of the acid anhydride is within this range, the SEI does not become too thick, and the stability of the SEI at higher temperatures increases.
- the content of the acid anhydride may be 0.01% by mass or more, or 0.5% by mass or more based on the total mass of the nonaqueous electrolytic solution.
- the content of the boron-containing compound is 0.001 to 5% by mass based on the total mass of the non-aqueous electrolyte. May be. In this range, the SEI does not become too thick and the stability of the SEI at higher temperatures is increased.
- the content of the boron-containing compound may be 0.01% by mass or more, or 0.1% by mass or more based on the total mass of the nonaqueous electrolytic solution.
- the content of the silicon-containing compound is 0.01 to 5% by mass based on the total mass of the non-aqueous electrolyte. May be. When the content of the silicon-containing compound is within this range, the SEI does not become too thick, and the stability of the SEI at higher temperatures increases.
- the content of the silicon-containing compound may be 0.1% by mass or more, or 0.5% by mass or more based on the total mass of the nonaqueous electrolytic solution.
- an aprotic solvent can be selected from the viewpoint of keeping the viscosity of the obtained non-aqueous electrolyte low.
- the aprotic solvent is at least one selected from the group consisting of cyclic carbonate, chain carbonate, aliphatic carboxylic acid ester, lactone, lactam, cyclic ether, chain ether, sulfone, nitrile, and halogen derivatives thereof. May be.
- a cyclic carbonate or a chain carbonate can be selected, and a combination of a cyclic carbonate and a chain carbonate can also be selected.
- Examples of the cyclic carbonate include ethylene carbonate, propylene carbonate, butylene carbonate, and FEC.
- Examples of the chain carbonate include dimethyl carbonate, diethyl carbonate, and ethyl methyl carbonate.
- Examples of the aliphatic carboxylic acid ester include methyl acetate, ethyl acetate, methyl propionate, ethyl propionate, methyl butyrate, methyl isobutyrate, and methyl trimethyl acetate.
- Examples of the lactone include ⁇ -butyrolactone.
- Examples of the lactam include ⁇ -caprolactam and N-methylpyrrolidone.
- Examples of the cyclic ether include tetrahydrofuran, 2-methyltetrahydrofuran, tetrahydropyran, 1,3-dioxolane and the like.
- Examples of the chain ether include 1,2-diethoxyethane, ethoxymethoxyethane, and the like.
- Examples of the sulfone include sulfolane.
- Examples of the nitrile include acetonitrile.
- Examples of the halogen derivative include 4-fluoro-1,3-dioxolane-2-one, 4-chloro-1,3-dioxolan-2-one, 4,5-difluoro-1,3-dioxolane-2- ON etc. are mentioned. These non-aqueous solvents may be used alone or in combination of two or more.
- the electrolyte may be a lithium salt that serves as a source of lithium ions.
- Electrolyte LiAlCl 4, LiBF 4, LiPF 6, LiClO 4, LiAsF 6 and may be at least one selected from the group consisting of LiSbF 6. From the viewpoint of having a high degree of dissociation and an ability to increase the ionic conductivity of the electrolytic solution and further suppressing the performance deterioration of the electricity storage device due to long-term use due to the oxidation-reduction characteristics, LiBF 4 and / or LiPF are used as the electrolyte. 6 may be selected. These electrolytes may be used alone or in combination of two or more.
- LiBF 4 and / or LiPF 6 When the electrolyte is LiBF 4 and / or LiPF 6 , one or more cyclic carbonates and chain carbonates may be combined as the non-aqueous solvent. In particular, LiBF 4 and / or LiPF 6 may be combined with ethylene carbonate and diethyl carbonate.
- the concentration of the electrolyte in the non-aqueous electrolyte may be 0.1 to 2.0 mol / L based on the volume of the non-aqueous electrolyte.
- concentration of the electrolyte is 0.1 mol / L or more, more excellent discharge characteristics or charge characteristics can be obtained.
- concentration of the electrolyte is 2.0 mol / L or less, the viscosity of the nonaqueous electrolytic solution is difficult to increase, and thus sufficient ion mobility can be secured.
- the electrolyte concentration may be 0.5 to 1.5 mol / L.
- the electrolyte (first lithium salt) and a second lithium salt different from the electrolyte may be used in combination.
- the second lithium salt include lithium difluorophosphate, lithium bisoxalatoborate (LiBOB), lithium tetrafluoro (oxalato) phosphate (LiTFOP), lithium difluorooxalatoborate (LiDFOB), and lithium difluorobisoxalatophosphate.
- LiDFOP lithium tetrafluoroborate
- lithium bisfluorosulfonylimide lithium bisfluorosulfonylimide
- lithium tetrafluoro (oxalato) phosphate lithium salt having a phosphate skeleton such as Li 2 PO 3 F
- the second lithium salt is lithium difluorophosphate, lithium bisoxalatoborate, lithium tetrafluoro (oxalato) phosphate, lithium difluorooxalatoborate, lithium difluorobisoxalate phosphate, lithium methyl sulfate, lithium ethyl sulfate, and fluorosulfone
- One or more lithium salts selected from the group consisting of lithium acid may be included.
- the concentration of the second lithium salt in the non-aqueous electrolyte may be 0.001 to 1.0 mol / L based on the volume of the non-aqueous electrolyte.
- concentration of the second lithium salt is 0.001 mol / L or more, more excellent charge / discharge characteristics can be obtained under high temperature conditions.
- concentration of the second lithium salt is 1.0 mol / L or less, the viscosity of the non-aqueous electrolyte is difficult to increase, and thus ion mobility can be sufficiently ensured.
- the concentration of the second lithium salt may be 0.01 to 0.8 mol / L or 0.01 to 0.5 mol / L.
- the electricity storage device is composed of the non-aqueous electrolyte and mainly a positive electrode and a negative electrode.
- Specific examples of the electricity storage device include a non-aqueous electrolyte secondary battery (such as a lithium ion battery) and an electric double layer capacitor (such as a lithium ion capacitor).
- the nonaqueous electrolytic solution according to the present embodiment is particularly useful in applications of lithium ion batteries and lithium ion capacitors.
- FIG. 1 is a cross-sectional view schematically showing an embodiment of an electricity storage device.
- An electricity storage device 1 shown in FIG. 1 is a non-aqueous electrolyte secondary battery.
- the electricity storage device 1 includes a positive electrode plate 4 (positive electrode), a negative electrode plate 7 (negative electrode) facing the positive electrode plate 4, a nonaqueous electrolytic solution 8 disposed between the positive electrode plate 4 and the negative electrode plate 7, and nonaqueous And a separator 9 provided in the electrolytic solution 8.
- the positive electrode plate 4 includes a positive electrode current collector 2 and a positive electrode active material layer 3 provided on the nonaqueous electrolyte solution 8 side.
- the negative electrode plate 7 includes a negative electrode current collector 5 and a negative electrode active material layer 6 provided on the nonaqueous electrolyte solution 8 side.
- the nonaqueous electrolytic solution 8 the nonaqueous electrolytic solution according to the above-described embodiment can be used.
- FIG. 1 a non-aqueous electrolyte secondary battery is shown as the electricity storage device, but the electricity storage device to which the non-aqueous electrolyte can be applied is not limited to this, and other electricity storage devices such as an electric double layer capacitor. It may be.
- the positive electrode current collector 2 and the negative electrode current collector 5 may be metal foils made of a metal such as aluminum, copper, nickel, and stainless steel, for example.
- the positive electrode active material layer 3 contains a positive electrode active material.
- the negative electrode active material layer 6 contains a negative electrode active material.
- the negative electrode active material may be a material that can occlude and release lithium, for example.
- Specific examples of such materials include crystalline carbon (such as natural graphite and artificial graphite), amorphous carbon, carbon materials such as carbon-coated graphite and resin-coated graphite, indium oxide, silicon oxide, tin oxide, zinc oxide and Metal materials such as an oxide material such as lithium oxide, lithium metal, and a metal that can form an alloy with lithium can be given.
- Specific examples of the metal capable of forming an alloy with lithium include Cu, Sn, Si, Co, Mn, Fe, Sb, and Ag. A binary or ternary alloy containing these metals and lithium can also be used as the negative electrode active material.
- These negative electrode active materials may be used alone or in combination of two or more.
- a carbon material such as graphite and a Si-based active material such as Si, Si alloy, or Si oxide may be combined as the negative electrode active material.
- graphite and a Si-based active material may be combined as the negative electrode active material.
- the ratio of the mass of the Si-based active material to the total mass of the carbon material and the Si-based active material is 0.5% by mass to 95% by mass, 1% by mass to 50% by mass, or 2 It may be not less than 40% by mass.
- the positive electrode active material layer 3 and the negative electrode active material layer 6 may further contain a binder.
- the binder include polyvinylidene fluoride (PVdF), vinylidene fluoride-hexafluoropropylene copolymer, vinylidene fluoride-tetrafluoroethylene copolymer, styrene-butadiene copolymer rubber, carboxymethyl cellulose, polytetrafluoro Examples thereof include ethylene, polypropylene, polyethylene, polyimide, polyamideimide, polyacrylic acid, polyvinyl alcohol, acrylic acid-polyacrylonitrile, polyacrylamide, polymethacrylic acid, and copolymers thereof.
- the binder may be the same or different between the positive electrode active material layer and the negative electrode active material layer.
- the positive electrode active material layer 3 and the negative electrode active material layer 6 may further include a conductive auxiliary material for the purpose of reducing resistance.
- a conductive auxiliary material include carbonaceous fine particles such as graphite, carbon black, acetylene black, and ketjen black, and carbon fibers.
- the separator 9 may be, for example, a single-layer or laminated microporous film, woven fabric, or non-woven porous film made of polyethylene, polypropylene, fluororesin, or the like.
- each member constituting the electricity storage device can be appropriately set by those skilled in the art.
- the configuration of the power storage device is not limited to the embodiment of FIG. 1 and can be changed as appropriate.
- LiPF 6 as an electrolyte was dissolved in the obtained mixed non-aqueous solvent so as to have a concentration of 1.0 mol / L.
- the compound 11 shown in Table 1 was added as an additive for a non-aqueous electrolyte to prepare a non-aqueous electrolyte.
- the content ratio of the additive for non-aqueous electrolyte (compound 11) was 0.5% by mass based on the total mass of the non-aqueous electrolyte.
- Example 2 A nonaqueous electrolytic solution was prepared in the same manner as in Example 1 except that the content ratio of Compound 11 was 1.0% by mass.
- Example 3 The nonaqueous electrolyte solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolyte solution was changed from compound 11 to compound 13 shown in Table 1 and the content ratio was 1.0% by mass. did.
- Example 4 A nonaqueous electrolyte solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolyte solution was changed from compound 11 to compound 14 shown in Table 1 and the content ratio was 1.0% by mass. did.
- Example 5 A nonaqueous electrolyte solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolyte solution was changed from compound 11 to compound 15 shown in Table 1 and the content ratio was 1.0% by mass. did.
- Example 6 A nonaqueous electrolyte solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolyte solution was changed from compound 11 to compound 16 shown in Table 1 and the content ratio was 1.0% by mass. did.
- Example 7 A nonaqueous electrolyte solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolyte solution was changed from compound 11 to compound 17 shown in Table 1 and the content ratio was 1.0% by mass. did.
- Example 8 The nonaqueous electrolyte solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolyte solution was changed from compound 11 to compound 18 shown in Table 1 and the content ratio was 1.0% by mass. did.
- Example 9 A nonaqueous electrolyte solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolyte solution was changed from compound 11 to compound 19 shown in Table 1 and the content ratio was 1.0% by mass. did.
- Example 10 A nonaqueous electrolyte solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolyte solution was changed from compound 11 to compound 20 shown in Table 1 and the content ratio was 1.0% by mass. did.
- Example 11 The nonaqueous electrolyte solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolyte solution was changed from compound 11 to compound 21 shown in Table 1 and the content ratio was 1.0% by mass. did.
- Example 12 A nonaqueous electrolyte solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolyte solution was changed from compound 11 to compound 23a shown in Table 1 and the content ratio was 1.0% by mass. did.
- Example 2 A nonaqueous electrolytic solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolytic solution was changed from Compound 11 to 1,3-propane sultone and the content ratio was 1.0% by mass. .
- Example 3 A nonaqueous electrolytic solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolytic solution was changed from compound 11 to vinylene carbonate (VC) and the content ratio was 1.0% by mass.
- Comparative Example 4 A nonaqueous electrolytic solution was prepared in the same manner as in Comparative Example 3 except that the content of vinylene carbonate (VC) was 2.0% by mass.
- Example 5 A nonaqueous electrolytic solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolytic solution was changed from Compound 11 to fluoroethylene carbonate (FEC) and the content ratio was 1.0% by mass. .
- FEC fluoroethylene carbonate
- Comparative Example 6 A nonaqueous electrolytic solution was prepared in the same manner as in Comparative Example 5 except that the content ratio of fluoroethylene carbonate (FEC) was 2.0% by mass.
- FEC fluoroethylene carbonate
- Example 7 A nonaqueous electrolyte solution was prepared in the same manner as in Example 1 except that the additive for nonaqueous electrolyte solution was changed from Compound 11 to sulfolane and the content ratio was 1.0% by mass.
- the fluoroethylene carbonate (FEC) used in Comparative Examples 5 and 6 was considered to be partially hydrolyzed and had poor stability.
- the compounds used in the examples were excellent in stability with almost no change in the peak of 1 H-NMR spectrum.
- LiNi 1/3 Co 1/3 Mn 1/3 O 2 as a positive electrode active material and carbon black as a conductivity imparting agent were dry mixed.
- the obtained mixture was uniformly dispersed in N-methyl-2-pyrrolidone (NMP) in which polyvinylidene fluoride (PVDF) was dissolved as a binder to prepare a slurry.
- NMP N-methyl-2-pyrrolidone
- PVDF polyvinylidene fluoride
- the obtained slurry was applied to both surfaces of an aluminum metal foil (square shape, thickness 20 ⁇ m). After removing NMP and drying the coating film, the whole was pressed to obtain a positive electrode sheet having an aluminum metal foil as a positive electrode current collector and a positive electrode active material layer formed on both surfaces thereof.
- As the negative electrode sheet a commercially available graphite-coated electrode sheet (manufactured by Hosen Co., Ltd., trade name: electrode sheet negative electrode single layer) was used.
- a negative electrode sheet, a polyethylene separator, a positive electrode sheet, a polyethylene separator, and a negative electrode sheet were laminated in this order to produce a battery element.
- This battery element was inserted into a bag formed of a laminate film having aluminum (thickness: 40 ⁇ m) and a resin layer covering both sides of the battery element so that the ends of the positive electrode sheet and the negative electrode sheet protrude from the bag. Subsequently, each nonaqueous electrolyte solution obtained in the Examples and Comparative Examples was injected into the bag. The bag was vacuum-sealed to obtain a sheet-like nonaqueous electrolyte secondary battery. Furthermore, in order to improve the adhesiveness between electrodes, the sheet-like nonaqueous electrolyte secondary battery was sandwiched between glass plates and pressurized.
- non-aqueous electrolyte secondary batteries having the same configuration including the electrolytes of the examples and comparative examples were prepared.
- This battery was charged to 4.2 V at 25 ° C. with a current corresponding to 0.2 C, and then discharged to 3 V with a current corresponding to 0.2 C for 3 cycles to stabilize the battery.
- the battery was stored at a high temperature of 60 ° C. and 168 hours. Then, it cooled to room temperature, measured the volume of the battery by Archimedes method, and calculated
- the non-aqueous electrolyte secondary battery using the non-aqueous electrolyte of each example containing the compound 11, 13 to 21 or 23a which is the compound of the formula (1) is the non-aqueous electrolyte of the comparative example.
- both the discharge capacity maintenance rate during the cycle test and the suppression of gas generation accompanying charging are superior.
- the compound of Formula (1) is excellent also in the point that there is little increase in internal resistance by a charging / discharging cycle.
- SYMBOLS 1 Power storage device (nonaqueous electrolyte secondary battery), 2 ... Positive electrode current collector, 3 ... Positive electrode active material layer, 4 ... Positive electrode plate, 5 ... Negative electrode current collector, 6 ... Negative electrode active material layer, 7 ... Negative electrode Plate, 8 ... non-aqueous electrolyte, 9 ... separator.
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Abstract
L'invention concerne un additif pour un électrolyte non aqueux, ledit additif contenant un composé représenté par la formule (1) ci-dessous. Dans la formule (1), X représente un groupe sulfonyle ou un groupe carbonyle ; R1 et R2 représentent un atome d'hydrogène, un groupe alkyle en C1 à C4 éventuellement substitué, etc. ; et A représente un groupe hydrocarbure divalent en C1 à C3 éventuellement substitué, ou un groupe divalent comprenant un groupe hydrocarbure divalent éventuellement substitué en C1 à C3 et un atome d'oxygène constituant une partie d'une structure cyclique conjointement avec le groupe hydrocarbure.
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CN112216867A (zh) * | 2020-09-29 | 2021-01-12 | 中国科学院成都有机化学有限公司 | 电解液添加剂、锂离子高压电解液、锂离子电池 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2013183655A1 (fr) * | 2012-06-05 | 2013-12-12 | 日本電気株式会社 | Cellule secondaire au lithium |
WO2014021272A1 (fr) * | 2012-07-31 | 2014-02-06 | 宇部興産株式会社 | Électrolyte non aqueux et dispositif de stockage d'énergie utilisant celui-ci |
KR20170108589A (ko) * | 2016-03-18 | 2017-09-27 | 삼성에스디아이 주식회사 | 유기전해액 및 상기 전해액을 채용한 리튬 전지 |
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- 2018-03-06 WO PCT/JP2018/008603 patent/WO2018164130A1/fr active Application Filing
- 2018-03-07 TW TW107107643A patent/TW201840548A/zh unknown
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WO2013183655A1 (fr) * | 2012-06-05 | 2013-12-12 | 日本電気株式会社 | Cellule secondaire au lithium |
WO2014021272A1 (fr) * | 2012-07-31 | 2014-02-06 | 宇部興産株式会社 | Électrolyte non aqueux et dispositif de stockage d'énergie utilisant celui-ci |
KR20170108589A (ko) * | 2016-03-18 | 2017-09-27 | 삼성에스디아이 주식회사 | 유기전해액 및 상기 전해액을 채용한 리튬 전지 |
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CN112216867A (zh) * | 2020-09-29 | 2021-01-12 | 中国科学院成都有机化学有限公司 | 电解液添加剂、锂离子高压电解液、锂离子电池 |
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