CN110808414A - Non-aqueous electrolyte of lithium ion battery and lithium ion battery using same - Google Patents
Non-aqueous electrolyte of lithium ion battery and lithium ion battery using same Download PDFInfo
- Publication number
- CN110808414A CN110808414A CN201911040483.7A CN201911040483A CN110808414A CN 110808414 A CN110808414 A CN 110808414A CN 201911040483 A CN201911040483 A CN 201911040483A CN 110808414 A CN110808414 A CN 110808414A
- Authority
- CN
- China
- Prior art keywords
- lithium
- lithium ion
- ion battery
- carbonate
- electrolytic solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 40
- 239000011255 nonaqueous electrolyte Substances 0.000 title claims abstract description 15
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 claims abstract description 30
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 claims abstract description 29
- 150000001875 compounds Chemical class 0.000 claims abstract description 22
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 13
- -1 trimethylsiloxy Chemical group 0.000 claims description 15
- 229910052736 halogen Inorganic materials 0.000 claims description 12
- 150000002367 halogens Chemical class 0.000 claims description 12
- 125000003545 alkoxy group Chemical group 0.000 claims description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229910003002 lithium salt Inorganic materials 0.000 claims description 8
- 159000000002 lithium salts Chemical class 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 150000002431 hydrogen Chemical class 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000007773 negative electrode material Substances 0.000 claims description 6
- 239000007774 positive electrode material Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 5
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 5
- 239000011356 non-aqueous organic solvent Substances 0.000 claims description 5
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000003575 carbonaceous material Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- OBNCKNCVKJNDBV-UHFFFAOYSA-N ethyl butyrate Chemical compound CCCC(=O)OCC OBNCKNCVKJNDBV-UHFFFAOYSA-N 0.000 claims description 4
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- MLFHJEHSLIIPHL-UHFFFAOYSA-N isoamyl acetate Chemical compound CC(C)CCOC(C)=O MLFHJEHSLIIPHL-UHFFFAOYSA-N 0.000 claims description 4
- QSZMZKBZAYQGRS-UHFFFAOYSA-N lithium;bis(trifluoromethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F QSZMZKBZAYQGRS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- PGMYKACGEOXYJE-UHFFFAOYSA-N pentyl acetate Chemical compound CCCCCOC(C)=O PGMYKACGEOXYJE-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000002210 silicon-based material Substances 0.000 claims description 4
- 239000011366 tin-based material Substances 0.000 claims description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 3
- 229910013872 LiPF Inorganic materials 0.000 claims description 3
- 101150058243 Lipf gene Proteins 0.000 claims description 3
- 150000001733 carboxylic acid esters Chemical class 0.000 claims description 3
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 3
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- JGFBQFKZKSSODQ-UHFFFAOYSA-N Isothiocyanatocyclopropane Chemical compound S=C=NC1CC1 JGFBQFKZKSSODQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910015013 LiAsF Inorganic materials 0.000 claims description 2
- 229910013075 LiBF Inorganic materials 0.000 claims description 2
- 229910012097 LiSbF Inorganic materials 0.000 claims description 2
- 239000007983 Tris buffer Substances 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- PWLNAUNEAKQYLH-UHFFFAOYSA-N butyric acid octyl ester Natural products CCCCCCCCOC(=O)CCC PWLNAUNEAKQYLH-UHFFFAOYSA-N 0.000 claims description 2
- 125000005587 carbonate group Chemical group 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 claims description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 2
- 125000001153 fluoro group Chemical group F* 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- GJRQTCIYDGXPES-UHFFFAOYSA-N iso-butyl acetate Natural products CC(C)COC(C)=O GJRQTCIYDGXPES-UHFFFAOYSA-N 0.000 claims description 2
- 229940117955 isoamyl acetate Drugs 0.000 claims description 2
- FGKJLKRYENPLQH-UHFFFAOYSA-M isocaproate Chemical compound CC(C)CCC([O-])=O FGKJLKRYENPLQH-UHFFFAOYSA-M 0.000 claims description 2
- OQAGVSWESNCJJT-UHFFFAOYSA-N isovaleric acid methyl ester Natural products COC(=O)CC(C)C OQAGVSWESNCJJT-UHFFFAOYSA-N 0.000 claims description 2
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 claims description 2
- 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 claims description 2
- IHLVCKWPAMTVTG-UHFFFAOYSA-N lithium;carbanide Chemical compound [Li+].[CH3-] IHLVCKWPAMTVTG-UHFFFAOYSA-N 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 claims description 2
- UUIQMZJEGPQKFD-UHFFFAOYSA-N n-butyric acid methyl ester Natural products CCCC(=O)OC UUIQMZJEGPQKFD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 229940090181 propyl acetate Drugs 0.000 claims description 2
- MCSINKKTEDDPNK-UHFFFAOYSA-N propyl propionate Chemical compound CCCOC(=O)CC MCSINKKTEDDPNK-UHFFFAOYSA-N 0.000 claims description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims description 2
- 229910052706 scandium Inorganic materials 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 229910052718 tin Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 2
- 125000001889 triflyl group Chemical group FC(F)(F)S(*)(=O)=O 0.000 claims description 2
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 claims description 2
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 239000008151 electrolyte solution Substances 0.000 claims 10
- 150000007942 carboxylates Chemical class 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 abstract description 11
- 229910001428 transition metal ion Inorganic materials 0.000 abstract description 11
- 239000000654 additive Substances 0.000 abstract description 10
- 238000003860 storage Methods 0.000 abstract description 10
- 230000000996 additive effect Effects 0.000 abstract description 6
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 238000004090 dissolution Methods 0.000 abstract description 2
- 125000002560 nitrile group Chemical group 0.000 abstract description 2
- 238000007086 side reaction Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 22
- 238000002360 preparation method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000011267 electrode slurry Substances 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 230000001351 cycling effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 2
- 239000006230 acetylene black Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910052794 bromium Inorganic materials 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
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- 238000000576 coating method Methods 0.000 description 2
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- 238000001035 drying Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 150000002825 nitriles Chemical class 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 238000003756 stirring Methods 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
- 125000005918 1,2-dimethylbutyl group Chemical group 0.000 description 1
- OHVLMTFVQDZYHP-UHFFFAOYSA-N 1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-2-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound N1N=NC=2CN(CCC=21)C(CN1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)=O OHVLMTFVQDZYHP-UHFFFAOYSA-N 0.000 description 1
- 125000006218 1-ethylbutyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C([H])([H])[H] 0.000 description 1
- LDXJRKWFNNFDSA-UHFFFAOYSA-N 2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound C1CN(CC2=NNN=C21)CC(=O)N3CCN(CC3)C4=CN=C(N=C4)NCC5=CC(=CC=C5)OC(F)(F)F LDXJRKWFNNFDSA-UHFFFAOYSA-N 0.000 description 1
- SXAMGRAIZSSWIH-UHFFFAOYSA-N 2-[3-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,2,4-oxadiazol-5-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NOC(=N1)CC(=O)N1CC2=C(CC1)NN=N2 SXAMGRAIZSSWIH-UHFFFAOYSA-N 0.000 description 1
- WZFUQSJFWNHZHM-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC(=O)N1CC2=C(CC1)NN=N2 WZFUQSJFWNHZHM-UHFFFAOYSA-N 0.000 description 1
- JQMFQLVAJGZSQS-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-N-(2-oxo-3H-1,3-benzoxazol-6-yl)acetamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC(=O)NC1=CC2=C(NC(O2)=O)C=C1 JQMFQLVAJGZSQS-UHFFFAOYSA-N 0.000 description 1
- YJLUBHOZZTYQIP-UHFFFAOYSA-N 2-[5-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NN=C(O1)CC(=O)N1CC2=C(CC1)NN=N2 YJLUBHOZZTYQIP-UHFFFAOYSA-N 0.000 description 1
- 125000006176 2-ethylbutyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(C([H])([H])*)C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004493 2-methylbut-1-yl group Chemical group CC(C*)CC 0.000 description 1
- 125000003542 3-methylbutan-2-yl group Chemical group [H]C([H])([H])C([H])(*)C([H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000005917 3-methylpentyl group Chemical group 0.000 description 1
- CONKBQPVFMXDOV-QHCPKHFHSA-N 6-[(5S)-5-[[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]methyl]-2-oxo-1,3-oxazolidin-3-yl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C[C@H]1CN(C(O1)=O)C1=CC2=C(NC(O2)=O)C=C1 CONKBQPVFMXDOV-QHCPKHFHSA-N 0.000 description 1
- 239000002000 Electrolyte additive Substances 0.000 description 1
- 229910000668 LiMnPO4 Inorganic materials 0.000 description 1
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- 229910018434 Mn0.5O2 Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
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- 229910052786 argon Inorganic materials 0.000 description 1
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- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
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- 125000004491 isohexyl group Chemical group C(CCC(C)C)* 0.000 description 1
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
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- 125000003538 pentan-3-yl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])C([H])([H])[H] 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
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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
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Abstract
The invention provides a lithium ion battery non-aqueous electrolyte and a lithium ion battery using the same. The compound shown in the formula 1, Vinylene Carbonate (VC) and/or fluoroethylene carbonate (FEC) are/is adopted as the additive, the compound shown in the formula 1 contains a nitrile group, and can be well complexed with transition metal ions on the surface of lithium cobaltate or a ternary anode, so that the surface of the anode is stabilized, side reactions of the transition metal ions in a high oxidation state and electrolyte under high voltage are inhibited, and the dissolution of the transition metal ions is inhibited, so that the anode is stabilized, the additive VC or FEC can be well formed into a film on the cathode, so that the cathode is stabilized, and the cycle performance and the high-temperature storage performance of the battery can be improved through the synergistic effect of the two.
Description
Technical Field
The invention belongs to the technical field of lithium ion battery materials, and particularly relates to a lithium ion battery non-aqueous electrolyte and a lithium ion battery using the same.
Background
Lithium batteries have been widely used in 3C products such as mobile phones and pen-type batteries, power batteries, and the like, and with the wide application of lithium ion batteries, consumers have made higher and stricter requirements on the energy density, cycle life, safety, and other properties of lithium ion batteries.
The ways of improving the energy density mainly include, on one hand, increasing the charging voltage of the battery, adopting a positive electrode with higher charging voltage, increasing the voltage of the existing battery by adopting a process, or adopting a high-capacity high-nickel positive electrode or lithium-rich positive electrode material, such as 4.2V LCO or NMC523 and the like to increase the voltage to 4.25V, 4.35V, 4.4V, 4.45V or even higher, and NMC622, NMC811, NCA, LiMnPO4、LiNiPO4、LiNi1.5Mn0.5O2And the like cathode materials; on the other hand, negative electrode materials such as silicon carbon with high energy density can be adopted; the energy density is also increased by reducing or thinning the thickness of the main material such as aluminum plastic film, diaphragm, aluminum foil, copper foil, etc., and by increasing the compaction and surface density of the positive and negative electrodes. However, the surface of the anode is unstable under high voltage or by adopting a high-nickel anode material, transition metal ions in a high oxidation state are unstable, and the transition metal ions are easy to dissolve out, and the high-nickel anode also has the problems of oxygen evolution, particle breakage and the like; in the negative electrode, the transition metal ions dissolved out and transferred to the negative electrode can damage a negative electrode SEI film, and then the transition metal ions are easily decomposed at high temperature, and in addition, the SEI film on the surface of the silicon-carbon negative electrode is unstable, the volume expansion is large, and the transition metal ions are easily damaged in the charging and discharging processes, so the performances of the battery such as cycle and high-temperature storage are required to be improved. The electrolyte is an important factor for improving the performance of the lithium ion battery, and the electrolyte additive is a key component in the electrolyte, so that the influence of each additive on each performance of the battery is mastered, and then the electrolyte meeting the requirements is developed by combining and optimizing the solvent, the lithium salt, the additive and the like and matching with a corresponding battery system.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a lithium ion battery non-aqueous electrolyte and a lithium ion battery using the same. The electrolyte comprises the compound shown in the formula 1 and Vinylene Carbonate (VC) and/or fluoroethylene carbonate (FEC), and the combination of the compound and the Vinylene Carbonate (VC) and/or the fluoroethylene carbonate (FEC) can generate a synergistic effect to improve the cycle performance and the high-temperature storage performance of the lithium ion battery.
The purpose of the invention is realized by the following technical scheme:
a non-aqueous electrolyte for a lithium ion battery, comprising a lithium salt, a non-aqueous organic solvent, Vinylene Carbonate (VC) and/or fluoroethylene carbonate (FEC), and one or more compounds represented by formula 1:
wherein R is1、R2、R3、R4、R5Identical or different, independently of one another, from hydrogen, halogen, unsubstituted or optionally substituted by one, two or more RaSubstituted of the following groups: c1-6Alkyl radical, C1-6An alkoxy group; r is selected from C or Si; n is an integer between 1 and 5;
each RaIdentical or different, independently of one another, from halogen, C1-6Alkyl radical, C1-6An alkoxy group.
According to the invention, R1、R2、R3Identical or different, independently of one another, from hydrogen, halogen, unsubstituted or optionally substituted by one, two or more RaSubstituted of the following groups: c1-6Alkyl radical, C1-6An alkoxy group; r is selected from C or Si; n is an integer between 1 and 5;
each RaIdentical or different, independently of one another, from halogen, C1-6Alkyl radical, C1-6An alkoxy group.
According to the invention, R4、R5Selected from hydrogen.
According to the invention, n is 1,2, 3, 4 or 5.
According to the invention, R1、R2、R3Are identical or different and are each independently selected from hydrogen, halogen,Methyl, ethyl, trimethylsiloxy, trifluoromethyl.
According to the invention, the compound represented by formula 1 is specifically selected from at least one of the following compounds:
the term "halogen" refers to F, Cl, Br and I. In other words, F, Cl, Br, and I may be described as "halogen" in the present specification.
The term "C1-6Alkyl is understood to preferably mean a straight-chain or branched, saturated monovalent hydrocarbon radical having from 1 to 6 carbon atoms, preferably C1-5An alkyl group. "C1-6Alkyl "is understood to preferably mean a straight-chain or branched, saturated monovalent hydrocarbon radical having 1,2, 3, 4, 5 or 6 carbon atoms. The alkyl group is, for example, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, an isopropyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an isopentyl group, a 2-methylbutyl group, a 1-ethylpropyl group, a 1, 2-dimethylpropyl group, a neopentyl group, a 1, 1-dimethylpropyl group, a 4-methylpentyl group, a 3-methylpentyl group, a 2-ethylbutyl group, a 1-ethylbutyl group, a 3, 3-dimethylbutyl group, a2, 2-dimethylbutyl group, a 1, 1-dimethylbutyl group, a2, 3-dimethylbutyl group, a 1, 3-dimethylbutyl group or a 1, 2-dimethylbutyl group. In particular, such groups are, for example, methyl, ethyl, propyl, butyl, isopropyl, isobutyl, sec-butyl, tert-butyl, more particularly such groups having 1,2 or 3 carbon atoms ("C)1-3Alkyl groups) such as methyl, ethyl, n-propyl or isopropyl.
As used herein, the term "alkyl" in "alkoxy" is as defined above.
According to the invention, the content of the compound represented by the formula 1 is 0.1 to 10 wt%, for example, 0.1 wt%, 0.2 wt%, 0.5 wt%, 1.0 wt%, 1.2 wt%, 1.5 wt%, 2.0 wt%, 2.5 wt%, 3 wt%, 4 wt%, 5 wt%, 6 wt%, 7 wt%, 8 wt%, 9 wt%, 10 wt% based on the total mass of the lithium ion battery nonaqueous electrolyte.
According to the invention, the content of the Vinylene Carbonate (VC) and/or fluoroethylene carbonate (FEC) is 0.1-20 wt%, preferably 0.1-10 wt%, for example 0.1 wt%, 0.2 wt%, 0.5 wt%, 1.0 wt%, 1.2 wt%, 1.5 wt%, 2.0 wt%, 2.5 wt%, 3 wt%, 4 wt%, 5 wt%, 6 wt%, 7 wt%, 8 wt%, 9 wt%, 10 wt%, 11 wt%, 12 wt%, 13 wt%, 14 wt%, 15 wt%, 16 wt%, 17 wt%, 18 wt%, 19 wt%, 20 wt% of the total mass of the lithium ion battery nonaqueous electrolyte.
According to the invention, the lithium salt is selected from lithium hexafluorophosphate (LiPF)6) Lithium tetrafluoroborate (LiBF)4) Lithium bis (oxalato) borate (LiBOB), lithium hexafluoroantimonate (LiSbF)6) Lithium hexafluoroarsenate (LiAsF)6) Lithium bis (trifluoromethylsulfonyl) imide (LiN (SO)2CF3)2) Lithium bis (pentafluoroethylsulfonyl) imide (LiN (SO)2C2F5)2) Tris (trifluoromethylsulfonyl) methyllithium (LiC (SO)2CF3)3) Or lithium bis (trifluoromethylsulfonyl) imide (LiN (CF)3SO2)2) One or more than two of them.
According to the invention, the content of the lithium salt is 8-18 wt%, for example 8 wt%, 9 wt%, 10 wt%, 11 wt%, 12 wt%, 13 wt%, 14 wt%, 15 wt%, 16 wt%, 17 wt%, 18 wt% of the total mass of the lithium ion battery nonaqueous electrolyte.
According to the invention, the non-aqueous organic solvent is selected from carbonate and/or carboxylic ester, and the carbonate is selected from one or more of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate and ethyl methyl carbonate; the carboxylic ester is selected from one or more of propyl acetate, n-butyl acetate, isobutyl acetate, n-amyl acetate, isoamyl acetate, ethyl propionate, n-propyl propionate, methyl butyrate, ethyl n-butyrate or fluoro solvents of the above solvents.
The invention also provides a preparation method of the non-aqueous electrolyte of the lithium ion battery, which comprises the following steps:
and mixing a nonaqueous organic solvent, a lithium salt, Vinylene Carbonate (VC) and/or fluoroethylene carbonate (FEC) and one or more compounds shown in formula 1 to prepare the nonaqueous electrolyte of the lithium ion battery.
The invention also provides a lithium ion battery, which comprises the lithium ion battery non-aqueous electrolyte.
According to the present invention, the lithium ion battery further includes a positive electrode sheet containing a positive electrode active material, a negative electrode sheet containing a negative electrode active material, and a lithium ion separator.
According to the invention, the positive active material is selected from one or more of layered lithium composite oxide, lithium manganate and lithium cobaltate mixed ternary materials; the chemical formula of the layered lithium composite oxide is Li1+xNiyCozM(1-y-z)Y2Wherein x is more than or equal to-0.1 and less than or equal to 1; y is more than or equal to 0 and less than or equal to 1, z is more than or equal to 0 and less than or equal to 1, and y + z is more than or equal to 0 and less than or equal to 1; wherein M is one or more of Mg, Zn, Ga, Ba, Al, Fe, Cr, Sn, V, Mn, Sc, Ti, Nb, Mo and Zr; y is one or more of O, F, P.
According to the invention, the negative active material is selected from one or more of carbon materials, silicon-based materials, tin-based materials or alloy materials corresponding to the carbon materials, the silicon-based materials and the tin-based materials.
According to the invention, the working voltage range of the lithium ion battery is 4.2V and above.
The invention has the beneficial effects that:
the invention provides a lithium ion battery non-aqueous electrolyte and a lithium ion battery using the same. The compound shown in the formula 1, Vinylene Carbonate (VC) and/or fluoroethylene carbonate (FEC) are/is adopted as additives, the compound shown in the formula 1 contains a nitrile group, and can be well complexed with transition metal ions on the surface of lithium cobaltate or a ternary positive electrode, so that the positive electrode is stabilized, side reactions of the transition metal ions in a high oxidation state under high voltage and an electrolyte are inhibited, and the dissolution of the transition metal ions is inhibited, so that the positive electrode is stabilized, the high temperature and the cycle performance of the battery are improved, meanwhile, SEI can be formed on the negative electrode by the negative electrode film forming additives VC and/or FEC, the negative electrode is stabilized, and the effects of improving the cycle performance of the battery and the electric performance of high temperature storage can be achieved through the synergistic effect of the SEI and the FEC.
Detailed Description
The preparation method of the present invention will be described in further detail with reference to specific examples. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
Comparative example 1
(1) Preparation of positive plate
Mixing a positive electrode active material 4.25V Lithium Cobaltate (LCO), a binder polyvinylidene fluoride (PVDF) and a conductive agent acetylene black according to a weight ratio of 97:1.5:1.5, adding N-methyl pyrrolidone (NMP), and stirring under the action of a vacuum stirrer until a mixed system becomes a uniform and fluid positive electrode slurry; uniformly coating the positive electrode slurry on an aluminum foil with the thickness of 10 mu m; baking the coated aluminum foil in 5 sections of baking ovens with different temperature gradients, drying the aluminum foil in a baking oven at 120 ℃ for 10 hours, and rolling and cutting to obtain the required positive plate.
(2) Preparation of negative plate
Mixing a negative electrode active material graphite, a thickening agent sodium carboxymethyl cellulose (CMC-Na), a binder styrene butadiene rubber and a conductive agent acetylene black according to a weight ratio of 97:1:1:1, adding deionized water, and obtaining negative electrode slurry under the action of a vacuum stirrer; uniformly coating the negative electrode slurry on a copper foil with the thickness of 8 mu m; and (3) airing the copper foil at room temperature, transferring the copper foil to an oven at 80 ℃ for drying for 11h, and then carrying out cold pressing and slitting to obtain the negative plate.
(3) Preparation of electrolyte
Uniformly mixing ethylene carbonate, diethyl carbonate and ethyl methyl carbonate according to the mass ratio of 35:40:25 in a glove box filled with argon and qualified in water oxygen content (the solvent and the additive need to be normalized together), and then quickly adding 13 wt% of fully dried lithium hexafluorophosphate (LiPF)6) Dissolving the materials in an organic solvent, adding the materials, stirring uniformly, and obtaining an electrolyte after the water and free acid are detected to be qualified, and the electrolysis of the embodiment and the comparative exampleThe additives and additive contents of the liquid are shown in table 1.
(4) Preparation of the separator
A polyethylene barrier film having a thickness of 8 μm (available from Asahi chemical Co., Ltd.) was used.
(5) Preparation of lithium ion battery
Stacking the prepared positive plate, the prepared isolating membrane and the prepared negative plate in sequence to ensure that the isolating membrane is positioned between the positive plate and the negative plate to play an isolating role, and then winding to obtain a naked battery cell without liquid injection; placing the bare cell in an outer packaging foil, injecting the prepared electrolyte into the dried bare cell, and performing vacuum packaging, standing, formation, shaping, sorting and other processes to obtain the required lithium ion battery.
(6) Normal temperature cycling experiment at 25 ℃:
thickness D of full-electricity cell before test0Placing the battery in an environment of (25 +/-3) DEG C, standing for 3 hours, charging the battery to 4.1V according to 1C when the battery core body reaches (25 +/-3) DEG C, then charging to 4.25V at 0.7C, then charging to cut-off current at constant voltage of 4.25V to 0.05C, then discharging to 3V at 1C, and recording initial capacity Q0When the circulation reaches the required times or the capacity decay rate is lower than 70 percent or the thickness exceeds the thickness required by the test, the previous discharge capacity is taken as the capacity Q of the battery1Calculating capacity retention rate (%), taking out the battery full, standing for 3 hours at normal temperature, and testing full thickness D1The thickness change rate (%) was calculated, and the results are shown in Table 2. The calculation formula used therein is as follows:
thickness change rate (%) - (D)1-D0)/D0100% of the total weight; capacity retention (%) ═ Q1/Q0*100％。
(7) High temperature cycling experiment at 45 ℃:
thickness D of full-electricity cell before test0Placing the battery in an environment of (45 +/-3) DEG C, standing for 3 hours, when the battery core body reaches (45 +/-3) DEG C, charging the battery to 4.25V at a constant current of 0.7C and a constant voltage of 4.25V until a cut-off current of 0.05C, discharging at 0.5C, and recording the initial capacity Q0Cycling through the number or capacity of cyclesWhen the attenuation rate is lower than 70% or the thickness exceeds the required thickness, the previous discharge capacity is taken as the capacity Q of the battery1Calculating capacity retention rate (%), taking out the battery full charge and core, standing for 3 hr at normal temperature, and testing full charge thickness D1The thickness change rate (%) was calculated, and the results are shown in Table 2. The calculation formula used therein is as follows:
thickness change rate (%) - (D)1-D0)/D0100% of the total weight; capacity retention (%) ═ Q1/Q0*100％。
(8) High temperature storage experiment at 60 ℃:
the thickness D of the fully charged cell was measured at 25 deg.C0Charging the formed battery to 4.1V according to 1C, then charging to 4.25V by 0.7C, then charging to 0.05C by 4.25V constant voltage, then discharging to 3.0V by 0.5C constant current, then charging to 4.1V by 1C, then charging to 4.25V by 0.7C, then charging to 0.05C by 4.25V constant voltage, placing in 60 ℃ environment for 14 days, and testing the full charge thickness D1The thickness change rate (%) was calculated, and the results are shown in Table 2.
The calculation formula used therein is as follows: thickness change rate (%) - (D)1-D0)/D0*100％。
Comparative examples 2 to 7 and examples 1 to 9 were prepared in the same manner as in comparative example 1 except that the components and contents of the electrolyte were different, and the specific differences are shown in table 1 below.
TABLE 1 compositions and contents of electrolytes of examples 1 to 9 and comparative examples 1 to 7
| VC | FEC | A2 | A4 | A7 | A8 | |
| Comparative example 1 | ||||||
| Comparative example 2 | 0.3 | |||||
| Comparative example 3 | 2 | |||||
| Comparative example 4 | 1 | |||||
| Comparative example 5 | 1 | |||||
| Comparative example 6 | 1 | |||||
| Comparative example 7 | 1 | |||||
| Example 1 | 0.3 | 1 | ||||
| Example 2 | 0.3 | 1 | ||||
| Example 3 | 0.3 | 1 | ||||
| Example 4 | 2 | 1 | ||||
| Example 5 | 2 | 1 | ||||
| Example 6 | 0.3 | 2 | 1 | |||
| Example 7 | 0.3 | 2 | 1 | |||
| Example 8 | 0.3 | 2 | 1 | 0.5 | ||
| Example 9 | 0.3 | 2 | 1 | 0.5 |
Remarking: wherein the content of each component is in wt%.
TABLE 2 examples 1-9 and comparative examples 1-7 are experimental results of comparison of cells
As can be seen from table 2, the batteries prepared in the examples of the present application all achieve better electrical properties, and the specific analysis is as follows:
the comparison between the comparative example 1 and the comparative examples 2 and 3 shows that the VC and the FEC can obviously improve the cycle performance, and have little influence on the cycle and the storage thickness;
it can be found from comparative example 1 and comparative examples 4 to 7 that the additives of the compounds of formula 1, a2, a4, a7 and A8, can significantly improve the cycle and storage properties;
by comparing comparative examples 1-3 with comparative example 2, it was found that the cycle performance and storage performance can be further improved compared to the single addition of VC, the combination of VC and the compound of formula 1;
by comparing comparative examples 4-5 with comparative example 3, it was found that the cycle performance and storage performance can be further improved compared to FEC alone, FEC in combination with the compound of formula 1;
it can be found from examples 1 to 5 and comparative examples 2 to 7 that the combination of VC or FEC and the compound of formula 1 can further improve the cycle performance of the battery compared to the compound of formula 1 alone;
it can be seen by comparing examples 1-5 with examples 6-9 that the combination of VC + FEC and the compound of formula 1 can further improve the cycling performance compared to VC or FEC alone and the combination of the compounds of formula 1;
it can be seen by comparing examples 6-7 with examples 8-9 that the combination of VC + FEC and two nitriles of formula 1 can further improve the cycle thickness swell and high temperature storage performance compared to the combination of VC + FEC and a single nitrile of formula 1.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A non-aqueous electrolyte for a lithium ion battery, comprising a lithium salt, a non-aqueous organic solvent, Vinylene Carbonate (VC) and/or fluoroethylene carbonate (FEC), and one or more compounds represented by formula 1:
wherein R is1、R2、R3、R4、R5Identical or different, independently of one another, from hydrogen, halogen, unsubstituted or optionally substituted by one, two or more RaSubstituted of the following groups: c1-6Alkyl radical, C1-6An alkoxy group; r is selected from C or Si; n is an integer between 1 and 5;
each RaIdentical or different, independently of one another, from halogen, C1-6Alkyl radical, C1-6An alkoxy group.
2. The nonaqueous electrolytic solution of claim 1, wherein R is1、R2、R3Identical or different, independently of one another, from hydrogen, halogen, unsubstituted or optionally substituted by one, two or more RaSubstituted of the following groups: c1-6Alkyl radical, C1-6An alkoxy group; r is selected from C or Si; n is an integer between 1 and 5;
each RaIdentical or different, independently of one another, from halogen, C1-6Alkyl radical, C1-6An alkoxy group.
3. The nonaqueous electrolytic solution of claim 1 or 2, wherein R is4、R5Selected from hydrogen;
and/or n is 1,2, 3, 4 or 5;
and/or, R1、R2、R3Identical or different, independently of one another, from the group consisting of hydrogen, halogen, methyl, ethyl, trimethylsiloxy, trifluoromethyl.
4. The nonaqueous electrolytic solution of any one of claims 1 to 3, wherein the compound represented by formula 1 is specifically selected from at least one of the following compounds:
5. the nonaqueous electrolytic solution of any one of claims 1 to 4, wherein the content of the compound represented by formula 1 is 0.1 to 10 wt% based on the total mass of the nonaqueous electrolytic solution for lithium ion batteries.
6. The nonaqueous electrolytic solution of any one of claims 1 to 5, wherein the Vinylene Carbonate (VC) and/or fluoroethylene carbonate (FEC) is contained in an amount of 0.1 to 20 wt%, preferably 0.1 to 10 wt%, based on the total mass of the nonaqueous electrolytic solution for lithium ion batteries.
7. The nonaqueous electrolytic solution of any one of claims 1 to 6, wherein the lithium salt is selected from lithium hexafluorophosphate (LiPF)6) Lithium tetrafluoroborate (LiBF)4) Lithium bis (oxalato) borate (LiBOB), lithium hexafluoroantimonate (LiSbF)6) Lithium hexafluoroarsenate (LiAsF)6) Lithium bis (trifluoromethylsulfonyl) imide (LiN (SO)2CF3)2) Lithium bis (pentafluoroethylsulfonyl) imide (LiN (SO)2C2F5)2) Tris (trifluoromethylsulfonyl) methyllithium (LiC (SO)2CF3)3) Or lithium bis (trifluoromethylsulfonyl) imide (LiN (CF)3SO2)2) One or more than two of the above; the content of the lithium salt accounts for 8-18 wt% of the total mass of the lithium ion battery non-aqueous electrolyte.
8. The nonaqueous electrolytic solution of any one of claims 1 to 7, wherein the nonaqueous organic solvent is selected from carbonate and/or carboxylate, and the carbonate is selected from one or more of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate and ethyl methyl carbonate; the carboxylic ester is selected from one or more of propyl acetate, n-butyl acetate, isobutyl acetate, n-amyl acetate, isoamyl acetate, ethyl propionate, n-propyl propionate, methyl butyrate, ethyl n-butyrate or fluoro solvents of the above solvents.
9. A lithium ion battery comprising the lithium ion battery nonaqueous electrolytic solution of any one of claims 1 to 8.
10. The lithium ion battery of claim 9, wherein the lithium ion battery further comprises a positive electrode sheet containing a positive electrode active material, a negative electrode sheet containing a negative electrode active material, and a lithium ion separator;
preferably, the positive active material is selected from one or more of layered lithium composite oxide, lithium manganate and lithium cobaltate mixed ternary materials; the chemical formula of the layered lithium composite oxide is Li1+xNiyCozM(1-y-z)Y2Wherein x is more than or equal to-0.1 and less than or equal to 1; y is more than or equal to 0 and less than or equal to 1, z is more than or equal to 0 and less than or equal to 1, and y + z is more than or equal to 0 and less than or equal to 1; wherein M is one or more of Mg, Zn, Ga, Ba, Al, Fe, Cr, Sn, V, Mn, Sc, Ti, Nb, Mo and Zr; y is one or more of O, F, P;
preferably, the negative active material is selected from one or more of carbon materials, silicon-based materials, tin-based materials or alloy materials corresponding to the carbon materials, the silicon-based materials and the tin-based materials;
preferably, the working voltage range of the lithium ion battery is 4.2V and above.
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| WO2022223678A3 (en) * | 2021-04-22 | 2022-12-01 | Mexichem Fluor S.A. De C.V. | Composition |
| CN113299972A (en) * | 2021-05-20 | 2021-08-24 | 珠海冠宇电池股份有限公司 | Lithium ion battery and application thereof |
| WO2024169403A1 (en) * | 2023-02-14 | 2024-08-22 | 珠海冠宇电池股份有限公司 | Battery |
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Address after: 519180 No. 209 Pearl Peak Avenue, Jingan Town, Doumen District, Zhuhai City, Guangdong Province Applicant after: Zhuhai CosMX Battery Co.,Ltd. Address before: 519180 No. 209 Pearl Peak Avenue, Jingan Town, Doumen District, Zhuhai City, Guangdong Province Applicant before: ZHUHAI COSLIGHT BATTERY Co.,Ltd. |
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Application publication date: 20200218 |