WO2022203402A1 - 화합물, 이를 포함하는 비수 전해액 및 리튬 이차전지 - Google Patents
화합물, 이를 포함하는 비수 전해액 및 리튬 이차전지 Download PDFInfo
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- WO2022203402A1 WO2022203402A1 PCT/KR2022/004089 KR2022004089W WO2022203402A1 WO 2022203402 A1 WO2022203402 A1 WO 2022203402A1 KR 2022004089 W KR2022004089 W KR 2022004089W WO 2022203402 A1 WO2022203402 A1 WO 2022203402A1
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- LWLOKSXSAUHTJO-UHFFFAOYSA-N 4,5-dimethyl-1,3-dioxolan-2-one Chemical compound CC1OC(=O)OC1C LWLOKSXSAUHTJO-UHFFFAOYSA-N 0.000 description 1
- LSUWCXHZPFTZSF-UHFFFAOYSA-N 4-ethyl-5-methyl-1,3-dioxolan-2-one Chemical compound CCC1OC(=O)OC1C LSUWCXHZPFTZSF-UHFFFAOYSA-N 0.000 description 1
- AUXJVUDWWLIGRU-UHFFFAOYSA-N 4-propyl-1,3-dioxolan-2-one Chemical compound CCCC1COC(=O)O1 AUXJVUDWWLIGRU-UHFFFAOYSA-N 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- BNTHVUMCVCSLSQ-UHFFFAOYSA-N C#CCOS(OCC(CC1)OS1(=O)=O)(=O)=O Chemical compound C#CCOS(OCC(CC1)OS1(=O)=O)(=O)=O BNTHVUMCVCSLSQ-UHFFFAOYSA-N 0.000 description 1
- 229910000925 Cd alloy Inorganic materials 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910018068 Li 2 O Inorganic materials 0.000 description 1
- 229910004406 Li(Ni0.6Mn0.2CO0.2)O2 Inorganic materials 0.000 description 1
- 229910004424 Li(Ni0.8Co0.15Al0.05)O2 Inorganic materials 0.000 description 1
- 229910004499 Li(Ni1/3Mn1/3Co1/3)O2 Inorganic materials 0.000 description 1
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 1
- 229910013188 LiBOB Inorganic materials 0.000 description 1
- 229910013372 LiC 4 Inorganic materials 0.000 description 1
- 229910013733 LiCo Inorganic materials 0.000 description 1
- 229910010941 LiFSI Inorganic materials 0.000 description 1
- 229910015645 LiMn Inorganic materials 0.000 description 1
- 229910015644 LiMn 2 - z Ni Inorganic materials 0.000 description 1
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 1
- 229910015872 LiNi0.8Co0.1Mn0.1O2 Inorganic materials 0.000 description 1
- 229910012258 LiPO Inorganic materials 0.000 description 1
- 229910012513 LiSbF 6 Inorganic materials 0.000 description 1
- XOBKSJJDNFUZPF-UHFFFAOYSA-N Methoxyethane Chemical compound CCOC XOBKSJJDNFUZPF-UHFFFAOYSA-N 0.000 description 1
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical compound CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 description 1
- ILMNIEGCMHQCSH-UHFFFAOYSA-N N#CCCOS(OCC(CC1)OS1(=O)=O)(=O)=O Chemical compound N#CCCOS(OCC(CC1)OS1(=O)=O)(=O)=O ILMNIEGCMHQCSH-UHFFFAOYSA-N 0.000 description 1
- NQTADLQHYWFPDB-UHFFFAOYSA-N N-Hydroxysuccinimide Chemical compound ON1C(=O)CCC1=O NQTADLQHYWFPDB-UHFFFAOYSA-N 0.000 description 1
- RFFFKMOABOFIDF-UHFFFAOYSA-N Pentanenitrile Chemical compound CCCCC#N RFFFKMOABOFIDF-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- NXPZICSHDHGMGT-UHFFFAOYSA-N [Co].[Mn].[Li] Chemical compound [Co].[Mn].[Li] NXPZICSHDHGMGT-UHFFFAOYSA-N 0.000 description 1
- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 description 1
- SOXUFMZTHZXOGC-UHFFFAOYSA-N [Li].[Mn].[Co].[Ni] Chemical compound [Li].[Mn].[Co].[Ni] SOXUFMZTHZXOGC-UHFFFAOYSA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- BTGRAWJCKBQKAO-UHFFFAOYSA-N adiponitrile Chemical compound N#CCCCCC#N BTGRAWJCKBQKAO-UHFFFAOYSA-N 0.000 description 1
- NDPGDHBNXZOBJS-UHFFFAOYSA-N aluminum lithium cobalt(2+) nickel(2+) oxygen(2-) Chemical compound [Li+].[O--].[O--].[O--].[O--].[Al+3].[Co++].[Ni++] NDPGDHBNXZOBJS-UHFFFAOYSA-N 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- SGLGUTWNGVJXPP-UHFFFAOYSA-N benzene-1,3,5-tricarbonitrile Chemical compound N#CC1=CC(C#N)=CC(C#N)=C1 SGLGUTWNGVJXPP-UHFFFAOYSA-N 0.000 description 1
- SKKCDEKRCCKEGO-UHFFFAOYSA-N benzyl (2,5-dioxopyrrolidin-1-yl) carbonate Chemical compound O=C(OCc1ccccc1)ON1C(=O)CCC1=O.O=C(OCc1ccccc1)ON1C(=O)CCC1=O SKKCDEKRCCKEGO-UHFFFAOYSA-N 0.000 description 1
- UORVGPXVDQYIDP-UHFFFAOYSA-N borane Chemical class B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 description 1
- 229910000085 borane Inorganic materials 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000006257 cathode slurry Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- CCRCUPLGCSFEDV-UHFFFAOYSA-N cinnamic acid methyl ester Natural products COC(=O)C=CC1=CC=CC=C1 CCRCUPLGCSFEDV-UHFFFAOYSA-N 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- VBWIZSYFQSOUFQ-UHFFFAOYSA-N cyclohexanecarbonitrile Chemical compound N#CC1CCCCC1 VBWIZSYFQSOUFQ-UHFFFAOYSA-N 0.000 description 1
- HHNHBFLGXIUXCM-GFCCVEGCSA-N cyclohexylbenzene Chemical compound [CH]1CCCC[C@@H]1C1=CC=CC=C1 HHNHBFLGXIUXCM-GFCCVEGCSA-N 0.000 description 1
- SVPZJHKVRMRREG-UHFFFAOYSA-N cyclopentanecarbonitrile Chemical compound N#CC1CCCC1 SVPZJHKVRMRREG-UHFFFAOYSA-N 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 229910052805 deuterium Inorganic materials 0.000 description 1
- ZFTFAPZRGNKQPU-UHFFFAOYSA-N dicarbonic acid Chemical compound OC(=O)OC(O)=O ZFTFAPZRGNKQPU-UHFFFAOYSA-N 0.000 description 1
- VUPKGFBOKBGHFZ-UHFFFAOYSA-N dipropyl carbonate Chemical compound CCCOC(=O)OCCC VUPKGFBOKBGHFZ-UHFFFAOYSA-N 0.000 description 1
- POLCUAVZOMRGSN-UHFFFAOYSA-N dipropyl ether Chemical compound CCCOCCC POLCUAVZOMRGSN-UHFFFAOYSA-N 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 125000006575 electron-withdrawing group Chemical group 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000004210 ether based solvent Substances 0.000 description 1
- 229940093499 ethyl acetate Drugs 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- QKBJDEGZZJWPJA-UHFFFAOYSA-N ethyl propyl carbonate Chemical compound [CH2]COC(=O)OCCC QKBJDEGZZJWPJA-UHFFFAOYSA-N 0.000 description 1
- KTWOOEGAPBSYNW-UHFFFAOYSA-N ferrocene Chemical compound [Fe+2].C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 KTWOOEGAPBSYNW-UHFFFAOYSA-N 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- SDAXRHHPNYTELL-UHFFFAOYSA-N heptanenitrile Chemical compound CCCCCCC#N SDAXRHHPNYTELL-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910003473 lithium bis(trifluoromethanesulfonyl)imide Inorganic materials 0.000 description 1
- 229910002102 lithium manganese oxide Inorganic materials 0.000 description 1
- FRMOHNDAXZZWQI-UHFFFAOYSA-N lithium manganese(2+) nickel(2+) oxygen(2-) Chemical compound [O-2].[Mn+2].[Ni+2].[Li+] FRMOHNDAXZZWQI-UHFFFAOYSA-N 0.000 description 1
- ACFSQHQYDZIPRL-UHFFFAOYSA-N lithium;bis(1,1,2,2,2-pentafluoroethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)C(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)C(F)(F)F ACFSQHQYDZIPRL-UHFFFAOYSA-N 0.000 description 1
- VDVLPSWVDYJFRW-UHFFFAOYSA-N lithium;bis(fluorosulfonyl)azanide Chemical compound [Li+].FS(=O)(=O)[N-]S(F)(=O)=O VDVLPSWVDYJFRW-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- VGYDTVNNDKLMHX-UHFFFAOYSA-N lithium;manganese;nickel;oxocobalt Chemical compound [Li].[Mn].[Ni].[Co]=O VGYDTVNNDKLMHX-UHFFFAOYSA-N 0.000 description 1
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- VNKYTQGIUYNRMY-UHFFFAOYSA-N methoxypropane Chemical compound CCCOC VNKYTQGIUYNRMY-UHFFFAOYSA-N 0.000 description 1
- CXHHBNMLPJOKQD-UHFFFAOYSA-M methyl carbonate Chemical compound COC([O-])=O CXHHBNMLPJOKQD-UHFFFAOYSA-M 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 description 1
- CCRCUPLGCSFEDV-BQYQJAHWSA-N methyl trans-cinnamate Chemical compound COC(=O)\C=C\C1=CC=CC=C1 CCRCUPLGCSFEDV-BQYQJAHWSA-N 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- 125000002560 nitrile group Chemical group 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- YSIMAPNUZAVQER-UHFFFAOYSA-N octanenitrile Chemical compound CCCCCCCC#N YSIMAPNUZAVQER-UHFFFAOYSA-N 0.000 description 1
- MHYFEEDKONKGEB-UHFFFAOYSA-N oxathiane 2,2-dioxide Chemical compound O=S1(=O)CCCCO1 MHYFEEDKONKGEB-UHFFFAOYSA-N 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- TVDSBUOJIPERQY-UHFFFAOYSA-N prop-2-yn-1-ol Chemical compound OCC#C TVDSBUOJIPERQY-UHFFFAOYSA-N 0.000 description 1
- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 description 1
- 229940001584 sodium metabisulfite Drugs 0.000 description 1
- 235000010262 sodium metabisulphite Nutrition 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 125000000547 substituted alkyl group Chemical group 0.000 description 1
- 125000005156 substituted alkylene group Chemical group 0.000 description 1
- 229960002317 succinimide Drugs 0.000 description 1
- IAHFWCOBPZCAEA-UHFFFAOYSA-N succinonitrile Chemical compound N#CCCC#N IAHFWCOBPZCAEA-UHFFFAOYSA-N 0.000 description 1
- 238000006277 sulfonation reaction Methods 0.000 description 1
- 125000001273 sulfonato group Chemical group [O-]S(*)(=O)=O 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- PCCVSPMFGIFTHU-UHFFFAOYSA-N tetracyanoquinodimethane Chemical compound N#CC(C#N)=C1C=CC(=C(C#N)C#N)C=C1 PCCVSPMFGIFTHU-UHFFFAOYSA-N 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D327/00—Heterocyclic compounds containing rings having oxygen and sulfur atoms as the only ring hetero atoms
- C07D327/02—Heterocyclic compounds containing rings having oxygen and sulfur atoms as the only ring hetero atoms one oxygen atom and one sulfur atom
- C07D327/04—Five-membered rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a sultone-based compound, a non-aqueous electrolyte containing the same, and a lithium secondary battery.
- Lithium secondary batteries are generally composed of a cathode active material made of lithium-containing transition metal oxide or a carbon material or silicon anode active material capable of occluding and releasing lithium ions, and a material mixed with a binder and a conductive material, respectively, as a cathode current collector, respectively. and a negative electrode current collector to prepare a positive electrode and a negative electrode, stacking them on both sides of a separator to form an electrode current collector of a predetermined shape, and then inserting the electrode current collector and a non-aqueous electrolyte into a battery case.
- formation (formation) and aging (aging) processes are almost essential.
- the formation process is a step of activating a secondary battery by repeating charging and discharging after battery assembly.
- lithium ions from a lithium-containing transition metal oxide used as a positive electrode move and insert into a carbon material negative active material used as a negative electrode do.
- the highly reactive lithium ions react with the electrolyte to generate compounds such as Li 2 CO 3 , Li 2 O, and LiOH, and these compounds form a Solid Electrolyte Interface (SEI) layer on the electrode surface.
- SEI Solid Electrolyte Interface
- the SEI layer is an important factor because the SEI layer closely affects the lifetime and capacity maintenance.
- the present invention is to solve the above problems, and when included in the non-aqueous electrolyte, the flammability of the non-aqueous electrolyte can be lowered, and a thin and stable SEI layer is formed to realize a lithium secondary battery having excellent high-temperature stability and lifespan characteristics. , to provide a non-aqueous electrolyte and a lithium secondary battery containing the same.
- the present invention provides a compound, a non-aqueous electrolyte, and a lithium secondary battery.
- the present invention provides a compound represented by the following formula (I).
- n and m are each independently 1 or 2
- Ak is a substituted or unsubstituted C 1 -C 10 alkylene group
- X is a C 1 -C 10 alkyl group substituted with one or more halogen atoms; -Y1-C ⁇ C-Y2 group; Or -Y1-CN group,
- Y1 is a direct bond; or a substituted or unsubstituted C 1 -C 10 alkylene group, wherein Y2 is hydrogen; Or a substituted or unsubstituted C 1 -C 10 alkyl group.
- the present invention provides a compound according to (1), wherein the compound represented by the formula (I) is a compound represented by the following formula (1).
- n and m are each independently 1 or 2
- Ak is a substituted or unsubstituted C 1 -C 10 alkylene group
- X is a C 1 -C 10 alkyl group substituted with one or more halogen atoms; -Y1-C ⁇ C-Y2 group; Or -Y1-CN group,
- Y1 is a direct bond; or a substituted or unsubstituted C 1 -C 10 alkylene group, wherein Y2 is hydrogen; Or a substituted or unsubstituted C 1 -C 10 alkyl group.
- the present invention provides the compound according to (1) or (2), wherein Ak is an unsubstituted C 1 -C 6 alkylene group.
- the present invention provides the compound according to any one of (1) to (3), wherein X is a C 1 -C 6 alkyl group substituted with one or more halogen elements.
- the present invention provides a compound according to any one of (1) to (3), wherein X is a -Y1'-CN group, and Y1' is an unsubstituted C 1 -C 6 alkylene group. do.
- the present invention provides a compound according to any one of (1) to (3), wherein the compound represented by the formula (I) is any one of the compounds represented by the following formulas (a) to (f).
- the present invention is an organic solvent; lithium salt; And it provides a non-aqueous electrolyte comprising the compound according to any one of (1) to (7).
- the present invention provides the non-aqueous electrolyte solution according to (8), wherein the compound is included in an amount of 0.01 wt % to 10 wt % based on the total weight of the non-aqueous electrolyte solution.
- the compound represented by Formula I according to the present invention When the compound represented by Formula I according to the present invention is included in the non-aqueous electrolyte, the flammability of the non-aqueous electrolyte can be reduced, and a thin and stable SEI layer is formed to provide a lithium secondary battery having excellent high-temperature stability and lifespan characteristics.
- 'C 1 to C 10 alkylene group' is an alkylene group containing 1 to 10 carbon atoms, that is, -CH 2 -, -CH 2 CH 2 -, -CH 2 CH 2 CH 2 -, -CH 2 CH(CH 3 )-, -CH(CH 3 )CH 2 -, -CH(CH 3 )CH 2 CH 2 -, and the like.
- the present invention provides a compound represented by the following formula (I).
- n and m are each independently 1 or 2
- Ak is a substituted or unsubstituted C 1 -C 10 alkylene group
- X is a C 1 -C 10 alkyl group substituted with one or more halogen atoms; -Y1-C ⁇ C-Y2 group; Or -Y1-CN group,
- Y1 is a direct bond; or a substituted or unsubstituted C 1 -C 10 alkylene group, wherein Y2 is hydrogen; Or a substituted or unsubstituted C 1 -C 10 alkyl group.
- the substituent in the substituted alkylene group or the substituted alkyl group is deuterium, a halogen group, a hydroxy group, an amino group, a thiol group, a nitro group, a nitrile group, a silyl group, and a straight or branched C 1 -C 6 alkoxy group. It may be one or more selected substituents.
- 1,3-propane sultone which is conventionally used as an electrolyte additive
- its use is limited due to toxicity
- the compound represented by Formula I of the present invention has low toxicity, unlike 1,3-propane sultone, and has a terminal group.
- a functional group that attracts electrons and a sulfite group or a sulfate group it is possible to form a film having a strong lithium salt conductivity and high conductivity on the surfaces of the positive electrode and the negative electrode.
- an electron withdrawing group is positioned at the terminal (X position) to lower the lowest unoccupied molecular orbital (LUMO) energy, thereby increasing reducibility. Therefore, it is possible to more easily form a film (SEI layer) on the electrode surface.
- the compound represented by the formula (I) contains a sultone group with high ionic conductivity in the molecule, thereby minimizing the increase in interfacial resistance and forming a stable film capable of preventing the electrode surface from being exposed, thereby forming a stable film between the electrode and the electrolyte Side reactions can be suppressed, O 2 generation can be suppressed, and transition metal elution from the anode can be effectively controlled.
- the sultone-based compound represented by the formula (I) of the present invention is prepared by sulfonating a diol-containing alkene compound or a diol-containing halogen compound, and condensing one alcohol group of the diol with a sulfonate group to produce a hydroxy group-containing sultone compound to do; preparing a compound containing a chlorosulfite group through a sulfonation reaction with a residual hydroxyl group; preparing a sulfite group-containing compound by reacting the chlorosulfite group-containing compound with an alcohol group; and preparing a sulfate group-containing compound by oxidizing the sulfite group, but is not limited thereto, and may be prepared by a known method.
- the compound represented by the formula (I) has a higher reduction potential than the non-aqueous solvent, so that it can be decomposed first under the cell driving condition to form a strong film, and the reduction potential is the Gaussian 09 program package (Gaussian 09 Revision C. 01, Gaussian Inc., Wallingford, CT, 2009) can be used for measurement by the following method.
- Gaussian 09 program package Gaussian 09 Revision C. 01, Gaussian Inc., Wallingford, CT, 2009
- E neut the stable structural energy of the compound in the state before reduction
- E red the stable structural energy of the compound in the reduced state
- E neut -E red -1.45 eV the reduction stability value.
- the structural stabilization calculation is performed in the state that the PCM (Polarizable Continuum Model) method is applied.
- Ak in the formula (I) may be an unsubstituted C 1 -C 6 alkylene group, more specifically, an unsubstituted C 1 -C 5 alkylene group.
- the compound can be easily synthesized, and when used as an additive for a non-aqueous electrolyte, the resistance of the SEI layer can be prevented from increasing, and consequently, the resistance of the battery can be prevented from being increased.
- X may be a C 1 -C 6 alkyl group substituted with one or more halogen elements, more specifically, a C 1 -C 5 alkyl group substituted with one or more halogen elements.
- the electron-attracting force is more excellent, the reducibility is high, and the SEI layer can be more easily formed on the electrode surface.
- the halogen element may specifically be a fluorine element.
- X is a -Y1'-C ⁇ C-Y2' group
- Y1' is an unsubstituted C 1 -C 6 alkylene group
- Y2' is hydrogen; Or it may be an unsubstituted C 1 -C 6 alkyl group.
- a C ⁇ C triple bond in one molecule may be polymerized with a C ⁇ C triple bond in another molecule to form a stronger SEI layer.
- the Y1′ may be specifically an unsubstituted C 1 -C 5 alkylene group
- Y2′ may be hydrogen; Or it may be an unsubstituted C 1 -C 5 alkyl group.
- X may be a -Y1'-CN group
- Y1' may be an unsubstituted C 1 -C 6 alkylene group
- Y1′ may be an unsubstituted C 1 -C 5 alkylene group.
- the electron-attracting force is more excellent, the reducibility is high, and the SEI layer can be more easily formed on the electrode surface.
- the compound represented by the formula (I) may be a compound represented by the following formula (1).
- n and m are each independently 1 or 2
- Ak is a substituted or unsubstituted C 1 -C 10 alkylene group
- X is a C 1 -C 10 alkyl group substituted with one or more halogen atoms; -Y1-C ⁇ C-Y2 group; Or -Y1-CN group,
- Y1 is a direct bond; or a substituted or unsubstituted C 1 -C 10 alkylene group, wherein Y2 is hydrogen; Or a substituted or unsubstituted C 1 -C 10 alkyl group.
- n, m, Ak, X, Y1, and Y2 may be the same as n, m, Ak, X, Y1, and Y2 in Formula I.
- Ak in Formula 1 may be an unsubstituted C 1 -C 6 alkylene group, wherein X is a C 1 -C 6 alkyl group substituted with one or more halogen atoms; a -Y1'-C ⁇ C-Y2' group (wherein Y1' is an unsubstituted C 1 -C 6 alkylene group, and Y2' is hydrogen; or an unsubstituted C 1 -C 6 alkyl group); Or -Y1'-CN group (Y1' is an unsubstituted C 1 -C 6 alkylene group) may be.
- the compound represented by Formula I may be a compound represented by the following Formulas a to f.
- the present invention relates to an organic solvent; lithium salt; And it provides a non-aqueous electrolyte comprising the compound represented by the formula (I).
- the non-aqueous electrolyte according to the present invention includes the compound represented by the above formula (I) as an additive.
- the compound is 0.01 wt% to 10 wt%, specifically, 0.01 wt% to 5 wt%, 0.01 wt% to 1 wt%, or 0.1 wt% to 1 wt% based on the total weight of the non-aqueous electrolyte % may be included.
- a solid SEI layer is formed, which can contribute to improving long-term lifespan characteristics and gas generation.
- the organic solvent is a non-aqueous solvent commonly used in lithium secondary batteries, and is not limited as long as it can minimize decomposition due to oxidation reaction during charging and discharging of the secondary battery, and exhibit desired properties together with additives.
- the organic solvent may be, for example, a linear carbonate or a cyclic carbonate, a linear ester or a cyclic ester, an ether, a glyme, a nitrile (acetonitrile, SN, etc.), but is not limited thereto.
- a carbonate-based electrolyte solvent including a carbonate compound that is typically a cyclic carbonate, a linear carbonate, or a mixture thereof may be used.
- cyclic carbonate compound examples include ethylene carbonate (EC), propylene carbonate (PC), 1,2-butylene carbonate, 2,3-butylene carbonate, 1,2-pentylene carbonate, 2,3-pentylene carbonate, vinylene carbonate, and fluoroethylene carbonate (FEC), but are not limited thereto.
- EC ethylene carbonate
- PC propylene carbonate
- 1,2-butylene carbonate 2,3-butylene carbonate
- 1,2-pentylene carbonate 2,3-pentylene carbonate
- vinylene carbonate vinylene carbonate
- FEC fluoroethylene carbonate
- linear carbonate compound examples include dimethyl carbonate (DMC), diethyl carbonate (DEC), dipropyl carbonate, ethylmethyl carbonate (EMC), methylpropyl carbonate and ethylpropyl carbonate, but in this It is not limited.
- linear ester compound examples include, but are not limited to, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, and butyl propionate.
- cyclic ester compound examples include, but are not limited to, ⁇ -butyrolactone, ⁇ -valerolactone, ⁇ -caprolactone, ⁇ -valerolactone, ⁇ -caprolactone, and the like.
- ether-based solvent examples include dimethyl ether, diethyl ether, dipropyl ether, methyl ethyl ether, methylpropyl ether, ethylpropyl ether, 1,3-dioxolane (DOL) and 2,2-bis(trifluoro). romethyl)-1,3-dioxolane (TFDOL), and the like, but are not limited thereto.
- the glyme-based solvent has a higher dielectric constant and a lower surface tension than the linear carbonate-based organic solvent, and is a solvent with less reactivity with metal, dimethoxyethane (glyme, DME), diethoxyethane, digylme, Tri-glyme (Triglyme), and tetra-glyme (TEGDME), and the like, but are not limited thereto.
- nitrile-based solvent examples include acetonitrile, propionitrile, butyronitrile, valeronitrile, caprylonitrile, heptanenitrile, cyclopentane carbonitrile, cyclohexane carbonitrile, 2-fluorobenzonitrile, 4-fluoro robenzonitrile, difluorobenzonitrile, trifluorobenzonitrile, phenylacetonitrile, 2-fluorophenylacetonitrile, 4-fluorophenylacetonitrile, and the like.
- ethylene carbonate and propylene carbonate which are the cyclic carbonate-based organic solvents, are high-viscosity organic solvents and have a high dielectric constant, so they can be used preferably because they dissociate lithium salts in the electrolyte well.
- These cyclic carbonates and dimethyl carbonate, diethyl carbonate, ethyl When a low-viscosity, low-dielectric constant linear carbonate such as methyl carbonate is mixed in an appropriate ratio, an electrolyte having high electrical conductivity can be prepared, and thus it can be used more preferably.
- the cyclic carbonate and the linear carbonate may be mixed and used in a volume ratio of 2:8 to 4:6.
- the lithium salt is used as an electrolyte salt in a lithium secondary battery, and is used as a medium for transferring ions.
- the lithium salt is LiPF 6 , LiBF 4 , LiSbF 6 , LiAsF 6 , LiClO 4 , LiN(C 2 F 5 SO 2 ) 2 , LiN(CF 3 SO 2 ) 2 , CF 3 SO 3 Li, LiC(CF) 3 SO 2 ) 3 , LiC 4 BO 8 , LiTFSI, LiFSI, and LiClO 4 may include at least one compound selected from the group consisting of, preferably LiPF 6 , but is not limited thereto.
- the lithium salt may be used alone or as a mixture of two or more as needed.
- the lithium salt may be included in the non-aqueous electrolyte at a concentration of 0.5M to 5M, preferably at a concentration of 0.5M to 4M.
- concentration of the lithium salt is within the above range, so that charging and discharging of the battery can be performed properly, and the viscosity of the electrolyte is appropriate so that the wetting in the battery is excellent, so that the battery performance can be improved.
- the non-aqueous electrolyte may further include other electrolyte additives.
- the other electrolyte additives are known electrolyte additives that can be additionally added to the non-aqueous electrolyte of the present invention, for example, vinylene carbonate (Vinylene Carbonate), vinyl ethylene carbonate (vinyl ethylene carbonate), catechol carbonate (catechol carbonate) ), ⁇ -bromo- ⁇ -butyrolactone ( ⁇ -bromo- ⁇ -butyrolactone), methyl chloroformate (methyl chloroformate), succinimide, N-benzyloxycarbonyloxysuccinimide (N -benzyloxycarbonyloxysuccinimide), N-hydroxysuccinimide, N-chlorosuccinimide, methyl cinnamate, 1,3,5-tricyanobenzene (1,3) ,5-tricyanobenzene), tetracyanoquinodimethane, pyrocarbonate, cyclohexylbenzene, propane sultone, succinonitrile, a
- the other electrolyte additives may be included in an amount of 0.01 wt% to 10 wt%, preferably 0.05 wt% to 7.0 wt%, more preferably 0.05 wt% to 5.0 wt%, based on the total weight of the non-aqueous electrolyte. .
- the present invention provides a lithium secondary battery comprising the non-aqueous electrolyte.
- the lithium secondary battery includes a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte according to the present invention.
- the lithium secondary battery of the present invention may be manufactured according to a conventional method known in the art. For example, after forming an electrode assembly in which a separator is disposed between a positive electrode and a negative electrode, the electrode assembly is inserted into a battery case, and the non-aqueous electrolyte according to the present invention may be injected.
- the positive electrode may be prepared by coating a positive electrode slurry including a positive electrode active material, a binder, a conductive material and a solvent on a positive electrode current collector.
- the positive electrode current collector is not particularly limited as long as it has conductivity without causing a chemical change in the battery.
- nickel, titanium, silver or the like surface-treated may be used.
- the bonding strength of the positive electrode active material may be strengthened by forming fine irregularities on the surface, and may be used in various forms such as films, sheets, foils, nets, porous bodies, foams, nonwovens, and the like.
- the positive active material is a compound capable of reversible intercalation and deintercalation of lithium, and specifically, may include one or more metals such as cobalt, manganese, nickel, or aluminum and lithium metal oxide including lithium.
- the lithium metal oxide is a lithium-manganese oxide (eg, LiMnO 2 , LiMn 2 O 4 , etc.), a lithium-cobalt-based oxide (eg, LiCoO 2 , etc.), a lithium-nickel-based oxide ( For example, LiNiO 2 etc.), lithium-nickel-manganese oxide (for example, LiNi 1-Y Mn Y O 2 (here, 0 ⁇ Y ⁇ 1), LiMn 2-z Ni z O 4 (here , 0 ⁇ Z ⁇ 2, etc.), lithium-nickel-cobalt-based oxides (eg, LiNi 1-Y1 Co Y1 O 2 (here, 0 ⁇ Y1 ⁇ 1), etc.), lithium-manganese-co
- the lithium metal oxide is LiCoO 2 , LiMnO 2 , LiNiO 2 , lithium nickel manganese cobalt oxide (for example, Li(Ni 1/3 Mn 1/3 Co 1 / 3 )O 2 , Li(Ni 0.6 Mn 0.2 Co 0.2 )O 2 , Li(Ni 0.5 Mn 0.3 Co 0.2 )O 2 , Li(Ni 0.7 Mn 0.15 Co 0.15 )O 2 and Li(Ni 0.8 Mn 0.1 Co 0.1 )O 2 , etc.), or lithium nickel cobalt aluminum oxide (eg, Li (Ni 0.8 Co 0.15 Al 0.05 )O 2 etc.) and the like, and considering the significant improvement effect by controlling the type and content ratio of the element forming the lithium composite metal oxide, the lithium composite metal oxide is Li(Ni).
- the cathode active material may be included in an amount of 60 wt% to 99 wt%, preferably 70 wt% to 99 wt%, more preferably 80 wt% to 98 wt%, based on the total weight of the solids excluding the solvent in the cathode slurry. have.
- the binder is a component that assists in bonding of the active material and the conductive material and the like to the current collector.
- binders examples include polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene (PE), polypropylene , ethylene-propylene-diene monomer, sulfonated ethylene-propylene-diene monomer, styrene-butadiene rubber, fluororubber, and various copolymers.
- the binder is included in an amount of 1 wt% to 20 wt%, preferably 1 wt% to 15 wt%, more preferably 1 wt% to 10 wt%, based on the total weight of the solids excluding the solvent in the positive electrode slurry.
- the conductive material is a component for further improving the conductivity of the positive electrode active material.
- the conductive material is not particularly limited as long as it has conductivity without causing a chemical change in the battery.
- graphite carbon-based materials such as carbon black, acetylene black, ketjen black, channel black, furnace black, lamp black, and thermal black
- conductive fibers such as carbon fibers and metal fibers
- metal powders such as carbon fluoride, aluminum, and nickel powder
- conductive whiskers such as zinc oxide and potassium titanate
- conductive metal oxides such as titanium oxide
- Conductive materials such as polyphenylene derivatives may be used.
- the conductive material is used in an amount of 1 wt% to 20 wt%, preferably 1 wt% to 15 wt%, more preferably 1 wt% to 10 wt%, based on the total weight of the solid material excluding the solvent in the slurry for the positive electrode. may be included.
- the solvent may include an organic solvent such as NMP (N-methyl-2-pyrrolidone), and may be used in an amount having a desirable viscosity when the positive active material and, optionally, a binder and a conductive material are included.
- NMP N-methyl-2-pyrrolidone
- the concentration of the solid content including the positive electrode active material, and optionally the binder and the conductive material is 50 wt% to 95 wt%, preferably 70 wt% to 95 wt%, more preferably 70 wt% to 90 wt% % may be included.
- the negative electrode may be prepared by, for example, coating a negative electrode slurry containing a negative electrode active material, a binder, a conductive material and a solvent on the negative electrode current collector, or using a graphite electrode made of carbon (C) or a metal itself as the negative electrode. have.
- the negative electrode current collector when a negative electrode is manufactured by coating a slurry for a negative electrode on the negative electrode current collector, the negative electrode current collector generally has a thickness of 3 to 500 ⁇ m.
- a negative current collector is not particularly limited as long as it has high conductivity without causing a chemical change in the battery, and for example, copper, stainless steel, aluminum, nickel, titanium, calcined carbon, copper or stainless steel.
- the surface treated with carbon, nickel, titanium, silver, etc., an aluminum-cadmium alloy, etc. may be used.
- the bonding strength of the negative electrode active material may be strengthened by forming fine irregularities on the surface, and may be used in various forms such as a film, sheet, foil, net, porous body, foam, non-woven body, and the like.
- the negative active material examples include natural graphite, artificial graphite, carbonaceous material; lithium-containing titanium composite oxide (LTO), Si, SiO x , Sn, Li, Zn, Mg, Cd, Ce, Ni or Fe metals (Me); alloys composed of the metals (Me); oxides of the metals (Me) (MeO x ); and one or more negative active materials selected from the group consisting of a composite of the metal (Me) and carbon.
- the negative active material may be a silicon-based negative active material including silicon (Si), silicon oxide (SiO x ), or a silicon alloy. In this case, a thin and stable SEI layer including a siloxane bond is formed, thereby further improving high-temperature stability and lifespan characteristics of the battery.
- the anode active material may be included in an amount of 60 wt% to 99 wt%, preferably 70 wt% to 99 wt%, more preferably 80 wt% to 98 wt%, based on the total weight of the solids excluding the solvent in the negative electrode slurry. have.
- the binder is a component that assists in bonding between the conductive material, the active material, and the current collector.
- binders include polyvinylidene fluoride (PVDF), polyvinyl alcohol, carboxymethylcellulose (CMC), starch, hydroxypropylcellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoro and roethylene, polyethylene, polypropylene, ethylene-propylene-diene monomer, sulfonated ethylene-propylene-diene monomer, styrene-butadiene rubber, fluororubber, and various copolymers thereof.
- the binder is 1 wt% to 20 wt%, preferably 1 wt% to 15 wt%, more preferably 1 wt% to 10 wt%, based on the total weight of the solids excluding the solvent in the negative electrode slurry may be included.
- the conductive material is a component for further improving the conductivity of the anode active material.
- a conductive material is not particularly limited as long as it has conductivity without causing a chemical change in the battery.
- graphite such as natural graphite or artificial graphite
- carbon black such as acetylene black, Ketjen black, channel black, furnace black, lamp black, and thermal black
- conductive fibers such as carbon fibers and metal fibers
- metal powders such as carbon fluoride, aluminum, and nickel powder
- conductive whiskers such as zinc oxide and potassium titanate
- conductive metal oxides such as titanium oxide
- Conductive materials such as polyphenylene derivatives may be used.
- the conductive material may be included in an amount of 1 wt% to 20 wt%, preferably 1 wt% to 15 wt%, more preferably 1 wt% to 10 wt%, based on the total weight of the solids excluding the solvent in the negative electrode slurry .
- the solvent may include water or an organic solvent such as NMP (N-methyl-2-pyrrolidone), and may be used in an amount to achieve a desirable viscosity when the negative active material and, optionally, a binder and a conductive material are included.
- NMP N-methyl-2-pyrrolidone
- the concentration of the solids including the negative active material, and optionally the binder and the conductive material is 50 wt% to 95 wt%, preferably 70 wt% to 90 wt%.
- a metal itself When a metal itself is used as the negative electrode, it may be manufactured by physically bonding, rolling, or depositing a metal on the metal thin film itself or the negative electrode current collector.
- a metal As the deposition method, an electrical deposition method or a chemical vapor deposition method may be used for metal.
- the metal to be bonded/rolled/deposited on the metal thin film itself or the negative electrode current collector is lithium (Li), nickel (Ni), tin (Sn), copper (Cu), and indium (In). It may include one type of metal or an alloy of two types of metals selected from
- a conventional porous polymer film conventionally used as a separator for example, an ethylene homocopolymer, a propylene homocopolymer, an ethylene/butene copolymer, an ethylene/hexene copolymer, and an ethylene/methacrylate copolymer, etc.
- a porous polymer film made of the same polyolefin-based polymer may be used alone or by laminating them, or a conventional porous nonwoven fabric, for example, a nonwoven fabric made of high-melting glass fiber, polyethylene terephthalate fiber, etc. may be used, but this It is not limited.
- a coated separator containing a ceramic component or a polymer material may be used, and may optionally be used in a single-layer or multi-layer structure.
- the external shape of the lithium secondary battery of the present invention is not particularly limited, but may be a cylindrical shape using a can, a prismatic shape, a pouch type, or a coin type.
- the present invention it is possible to provide a battery module including the lithium secondary battery as a unit cell and a battery pack including the same. Since the battery module and the battery pack include the lithium secondary battery having high capacity, high rate rate characteristics and cycle characteristics, mid-to-large selected from the group consisting of electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, and power storage systems It can be used as a power source for the device.
- the flask containing the intermediate (2,2-dioxido-1,2-oxathiolan-5-yl)methyl (2,2,2-trifluroethyl) sulfite was placed in an ice bath, followed by water and acetonitrile.
- 1.3eq of sodium periodate (sodium periodate, Aldrich) and 0.01eq of ruthenium (III) chloride (Aldrich) were added to a mixed solvent in which nitrile was mixed in a 1:1 weight ratio, and placed in an ice bath for 1 hour stirred for a while.
- Positive active material LiNi 0.8 Co 0.1 Mn 0.1 O 2
- conductive material carbon black
- binder polyvinylidene fluoride
- NMP N-methyl- 2 -pyrrolidone
- a negative electrode active material (graphite):conductive material (carbon black):binder (polyvinylidene fluoride) was added to distilled water in a weight ratio of 96:0.5:3.5 to prepare a slurry for a negative electrode (solid content: 50% by weight).
- the negative electrode slurry was applied to one surface of a positive electrode current collector (Cu thin film) having a thickness of 8 ⁇ m, dried and rolled to prepare a negative electrode.
- a secondary battery was prepared (see Table 1 below).
- a lithium secondary battery was prepared in the same manner as in Example 1 except that (see Table 1 below).
- a secondary battery was prepared (see Table 1 below).
- a secondary battery was prepared (see Table 1 below).
- a secondary battery was prepared (see Table 1 below).
- a secondary battery was prepared (see Table 1 below).
- EC ethylene carbonate
- EMC ethylmethyl carbonate
- a lithium secondary battery was prepared by the method (see Table 1 below).
- the volume change rate and resistance increase rate after high-temperature storage were calculated in the following way.
- Each of the secondary batteries prepared in Examples 1 to 7 and Comparative Examples 1 and 2 was activated with a 0.1C constant current (CC). Then, using a PESC05-0.5 charger/discharger (manufacturer: PNE Solution, 5V, 500mA) at 25°C, it was charged with a constant current of 0.33C to 4.2V under constant current-constant voltage (CC-CV) charging conditions and then with a current of 0.05C The cut was carried out, and it was discharged at 0.33C up to 2.5V under CC conditions. The charging/discharging was performed as 1 cycle, and 2 cycles were performed.
- CC-CV constant current-constant voltage
- the volume change rate (%) after high temperature storage was calculated by substituting the initial volume measured as described above and the volume after high temperature storage into the following formula (1), and the results are shown in Table 2 below.
- Each of the secondary batteries prepared in Examples 1 to 7 and Comparative Examples 1 and 2 was activated with a 0.1C constant current (CC). Then, using a PESC05-0.5 charger/discharger (manufacturer: PNE Solution, 5V, 500mA) at 25°C, it was charged with a constant current of 0.33C to 4.2V under constant current-constant voltage (CC-CV) charging conditions and then with a current of 0.05C The cut was carried out, and it was discharged at 0.33C up to 2.5V under CC conditions. The charging/discharging was performed as 1 cycle, and 2 cycles were performed.
- CC-CV constant current-constant voltage
- Each of the secondary batteries prepared in Examples 1 to 7 and Comparative Examples 1 and 2 was activated with a 0.1C constant current (CC). Then, using a PESC05-0.5 charger/discharger (manufacturer: PNE Solution, 5V, 500mA) at 25°C, it was charged with a constant current of 0.33C up to 4.2V under constant current-constant voltage (CC-CV) charging conditions and then with a current of 0.05C The cut was carried out, and it was discharged at 0.33C up to 2.5V under CC conditions. The charging/discharging was performed as 1 cycle, and 2 cycles were performed.
- CC-CV constant current-constant voltage
- Example 1 Discharge capacity retention rate after 100 cycles (%) Resistance increase rate after 100 cycles (%)
- Example 1 93 10
- Example 2 91 12
- Example 3 88 15
- Example 4 89 17
- Example 5 91 16
- Example 6 94 9.5
- Example 7 92 14 Comparative Example 1 78 40 Comparative Example 2 85 24
- the secondary batteries prepared in Examples 1 to 7 had significantly lower volume change rate and resistance increase rate during high temperature storage compared to the secondary batteries prepared in Comparative Examples 1 and 2.
- the secondary batteries prepared in Examples 1 to 7 had high discharge capacity retention rate after 100 cycles and low resistance increase rate, so that the lifespan characteristics of the secondary batteries prepared in Comparative Examples 1 and 2 were higher than those of the secondary batteries prepared in Comparative Examples 1 and 2 It can be seen that it is remarkably excellent. This property is because the sultone-based compound (compound represented by Formula I of the present invention) contained in the non-aqueous electrolytes of Examples 1 to 7 efficiently generates an SEI layer with high stability and low resistance.
- the compound represented by Formula I when included in the non-aqueous electrolyte as an additive, the flammability of the non-aqueous electrolyte can be lowered, and a strong SEI layer with low resistance is formed, resulting in excellent high-temperature stability and lifespan characteristics. It can be seen that a battery can be provided.
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Abstract
Description
리튬염 | 유기용매 | 첨가제 | |||
구성 | 첨가량 (g) | 종류 | 첨가량 (g) | ||
실시예 1 | 1.0 LiPF6 | EC:EMC = 3:7 부피비 | 99 | 화학식 a로 표시되는 화합물 | 1 |
실시예 2 | 99 | 화학식 b로 표시되는 화합물 | 1 | ||
실시예 3 | 99.5 | 화학식 a로 표시되는 화합물 | 0.5 | ||
실시예 4 | 99 | 화학식 c로 표시되는 화합물 | 1 | ||
실시예 5 | 99 | 화학식 d로 표시되는 화합물 | 1 | ||
실시예 6 | 99 | 화학식 e로 표시되는 화합물 | 1 | ||
실시예 7 | 99 | 화학식 f로 표시되는 화합물 | 1 | ||
비교예 1 | 100 | - | 0 | ||
비교예 2 | 99 | 1,3-프로판 설톤 | 1 |
고온 저장 후의 부피 변화율 (%) | 고온 저장 후의 저항 증가율 (%) | |
실시예 1 | 9 | 8 |
실시예 2 | 12 | 10 |
실시예 3 | 11 | 9 |
실시예 4 | 17 | 15 |
실시예 5 | 12 | 14 |
실시예 6 | 8 | 7 |
실시예 7 | 13 | 10 |
비교예 1 | 37 | 45 |
비교예 2 | 25 | 40 |
100 사이클 후의 방전 용량 유지율 (%) | 100 사이클 후의 저항 증가율 (%) | |
실시예 1 | 93 | 10 |
실시예 2 | 91 | 12 |
실시예 3 | 88 | 15 |
실시예 4 | 89 | 17 |
실시예 5 | 91 | 16 |
실시예 6 | 94 | 9.5 |
실시예 7 | 92 | 14 |
비교예 1 | 78 | 40 |
비교예 2 | 85 | 24 |
Claims (10)
- 청구항 1에 있어서,상기 Ak는 비치환된 C1-C6의 알킬렌기인 화합물.
- 청구항 1에 있어서,상기 X는 하나 이상의 할로겐 원소로 치환된 C1-C6의 알킬기인 화합물.
- 청구항 1에 있어서,상기 X는 -Y1'-C≡C-Y2'기이고,상기 Y1'은 비치환된 C1-C6의 알킬렌기이며, 상기 Y2'는 수소; 또는 비치환된 C1-C6의 알킬기인 화합물.
- 청구항 1에 있어서,상기 X는 -Y1'-CN기이고,상기 Y1'은 비치환된 C1-C6의 알킬렌기인 화합물.
- 유기 용매; 리튬염; 및 청구항 1 내지 7 중 어느 한 항에 따른 화합물을 포함하는 비수 전해액.
- 청구항 8에 있어서,상기 화합물은 상기 비수 전해액 전체 중량을 기준으로 0.01중량% 내지 10중량%로 포함되는 것인 비수 전해액.
- 청구항 8에 따른 비수 전해액을 포함하는 리튬 이차전지.
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US18/274,594 US20240109858A1 (en) | 2021-03-23 | 2022-03-23 | Compound, Non-Aqueous Electrolyte Solution Including the Same, and Lithium Secondary Battery |
CN202280010344.3A CN116685579A (zh) | 2021-03-23 | 2022-03-23 | 化合物、包含该化合物的非水电解液和锂二次电池 |
JP2023547129A JP2024505979A (ja) | 2021-03-23 | 2022-03-23 | 化合物、これを含む非水電解液およびリチウム二次電池 |
EP22776102.0A EP4269398A1 (en) | 2021-03-23 | 2022-03-23 | Compound, nonaqueous electrolytic solution comprising same, and lithium secondary battery |
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KR1020220035958A KR20220132467A (ko) | 2021-03-23 | 2022-03-23 | 화합물, 이를 포함하는 비수 전해액 및 리튬 이차전지 |
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KR20140031233A (ko) * | 2011-04-26 | 2014-03-12 | 우베 고산 가부시키가이샤 | 비수 전해액, 그것을 이용한 축전 디바이스, 및 환상 설폰산 에스터 화합물 |
KR101941401B1 (ko) * | 2018-02-07 | 2019-01-22 | 동우 화인켐 주식회사 | 전해액 조성물 및 이를 이용한 이차전지 |
CN110676511A (zh) * | 2019-09-02 | 2020-01-10 | 孚能科技(赣州)股份有限公司 | 一种锂离子电池电解液和锂离子二次电池 |
CN111276746A (zh) * | 2020-03-27 | 2020-06-12 | 宁德新能源科技有限公司 | 电化学装置及包含其的电子装置 |
KR20200090223A (ko) * | 2017-12-12 | 2020-07-28 | 샌트랄 글래스 컴퍼니 리미티드 | 비수전해액 전지용 전해액 및 그것을 이용한 비수전해액 전지 |
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- 2022-03-23 JP JP2023547129A patent/JP2024505979A/ja active Pending
- 2022-03-23 US US18/274,594 patent/US20240109858A1/en active Pending
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KR20140031233A (ko) * | 2011-04-26 | 2014-03-12 | 우베 고산 가부시키가이샤 | 비수 전해액, 그것을 이용한 축전 디바이스, 및 환상 설폰산 에스터 화합물 |
WO2013184881A1 (en) * | 2012-06-06 | 2013-12-12 | Johnson Controls Technology Corporation | Electrolyte formulation for high voltage and wide temperature lithium-ion cells |
KR20200090223A (ko) * | 2017-12-12 | 2020-07-28 | 샌트랄 글래스 컴퍼니 리미티드 | 비수전해액 전지용 전해액 및 그것을 이용한 비수전해액 전지 |
KR101941401B1 (ko) * | 2018-02-07 | 2019-01-22 | 동우 화인켐 주식회사 | 전해액 조성물 및 이를 이용한 이차전지 |
CN110676511A (zh) * | 2019-09-02 | 2020-01-10 | 孚能科技(赣州)股份有限公司 | 一种锂离子电池电解液和锂离子二次电池 |
CN111276746A (zh) * | 2020-03-27 | 2020-06-12 | 宁德新能源科技有限公司 | 电化学装置及包含其的电子装置 |
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