KR102522025B1 - 리튬 이차전지 - Google Patents
리튬 이차전지 Download PDFInfo
- Publication number
- KR102522025B1 KR102522025B1 KR1020200055448A KR20200055448A KR102522025B1 KR 102522025 B1 KR102522025 B1 KR 102522025B1 KR 1020200055448 A KR1020200055448 A KR 1020200055448A KR 20200055448 A KR20200055448 A KR 20200055448A KR 102522025 B1 KR102522025 B1 KR 102522025B1
- Authority
- KR
- South Korea
- Prior art keywords
- lithium
- secondary battery
- protective layer
- lithium secondary
- porous polyolefin
- 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.)
- Active
Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 87
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 239000011241 protective layer Substances 0.000 claims description 69
- 229920000098 polyolefin Polymers 0.000 claims description 53
- -1 ethylene, propylene, 1-butene Chemical class 0.000 claims description 31
- 239000008151 electrolyte solution Substances 0.000 claims description 30
- 239000000178 monomer Substances 0.000 claims description 24
- 239000010410 layer Substances 0.000 claims description 22
- 229910003002 lithium salt Inorganic materials 0.000 claims description 22
- 159000000002 lithium salts Chemical class 0.000 claims description 22
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 14
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 13
- VDVLPSWVDYJFRW-UHFFFAOYSA-N lithium;bis(fluorosulfonyl)azanide Chemical compound [Li+].FS(=O)(=O)[N-]S(F)(=O)=O VDVLPSWVDYJFRW-UHFFFAOYSA-N 0.000 claims description 12
- 238000009832 plasma treatment Methods 0.000 claims description 12
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 11
- 239000003960 organic solvent Substances 0.000 claims description 11
- 230000035699 permeability Effects 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 8
- 239000003660 carbonate based solvent Substances 0.000 claims description 8
- 239000004210 ether based solvent Substances 0.000 claims description 7
- 239000012046 mixed solvent Substances 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- ZGEGCLOFRBLKSE-UHFFFAOYSA-N 1-Heptene Chemical compound CCCCCC=C ZGEGCLOFRBLKSE-UHFFFAOYSA-N 0.000 claims description 6
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical compound CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 claims description 6
- GQEZCXVZFLOKMC-UHFFFAOYSA-N 1-hexadecene Chemical compound CCCCCCCCCCCCCCC=C GQEZCXVZFLOKMC-UHFFFAOYSA-N 0.000 claims description 6
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 claims description 6
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 claims description 6
- HFDVRLIODXPAHB-UHFFFAOYSA-N 1-tetradecene Chemical compound CCCCCCCCCCCCC=C HFDVRLIODXPAHB-UHFFFAOYSA-N 0.000 claims description 6
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 claims description 6
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 6
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims description 6
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 6
- 229910019142 PO4 Inorganic materials 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 6
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 6
- VAMFXQBUQXONLZ-UHFFFAOYSA-N n-alpha-eicosene Natural products CCCCCCCCCCCCCCCCCCC=C VAMFXQBUQXONLZ-UHFFFAOYSA-N 0.000 claims description 6
- CCCMONHAUSKTEQ-UHFFFAOYSA-N octadec-1-ene Chemical compound CCCCCCCCCCCCCCCCC=C CCCMONHAUSKTEQ-UHFFFAOYSA-N 0.000 claims description 6
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 6
- 239000010452 phosphate Substances 0.000 claims description 6
- CRSBERNSMYQZNG-UHFFFAOYSA-N 1 -dodecene Natural products CCCCCCCCCCC=C CRSBERNSMYQZNG-UHFFFAOYSA-N 0.000 claims description 5
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 5
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 5
- 229910003473 lithium bis(trifluoromethanesulfonyl)imide Inorganic materials 0.000 claims description 5
- 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 5
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 claims description 4
- FUSUHKVFWTUUBE-UHFFFAOYSA-N buten-2-one Chemical compound CC(=O)C=C FUSUHKVFWTUUBE-UHFFFAOYSA-N 0.000 claims description 4
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 4
- 150000003949 imides Chemical class 0.000 claims description 4
- 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 4
- 229940106006 1-eicosene Drugs 0.000 claims description 3
- FIKTURVKRGQNQD-UHFFFAOYSA-N 1-eicosene Natural products CCCCCCCCCCCCCCCCCC=CC(O)=O FIKTURVKRGQNQD-UHFFFAOYSA-N 0.000 claims description 3
- 229910010238 LiAlCl 4 Inorganic materials 0.000 claims description 3
- 229910010093 LiAlO Inorganic materials 0.000 claims description 3
- 229910015015 LiAsF 6 Inorganic materials 0.000 claims description 3
- 229910013063 LiBF 4 Inorganic materials 0.000 claims description 3
- 229910013372 LiC 4 Inorganic materials 0.000 claims description 3
- 229910013684 LiClO 4 Inorganic materials 0.000 claims description 3
- 229910013870 LiPF 6 Inorganic materials 0.000 claims description 3
- 229910012513 LiSbF 6 Inorganic materials 0.000 claims description 3
- 150000001336 alkenes Chemical class 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 150000001735 carboxylic acids Chemical class 0.000 claims description 3
- 229940069096 dodecene Drugs 0.000 claims description 3
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 claims description 3
- 229910002102 lithium manganese oxide Inorganic materials 0.000 claims description 3
- FRMOHNDAXZZWQI-UHFFFAOYSA-N lithium manganese(2+) nickel(2+) oxygen(2-) Chemical compound [O-2].[Mn+2].[Ni+2].[Li+] FRMOHNDAXZZWQI-UHFFFAOYSA-N 0.000 claims description 3
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 claims description 3
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 claims description 3
- 125000005151 nonafluorobutanesulfonyl group Chemical group FC(C(C(S(=O)(=O)*)(F)F)(F)F)(C(F)(F)F)F 0.000 claims description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 3
- 239000007774 positive electrode material Substances 0.000 claims description 3
- 150000003440 styrenes Chemical class 0.000 claims description 3
- VIEVWNYBKMKQIH-UHFFFAOYSA-N [Co]=O.[Mn].[Li] Chemical compound [Co]=O.[Mn].[Li] VIEVWNYBKMKQIH-UHFFFAOYSA-N 0.000 claims description 2
- QTHKJEYUQSLYTH-UHFFFAOYSA-N [Co]=O.[Ni].[Li] Chemical compound [Co]=O.[Ni].[Li] QTHKJEYUQSLYTH-UHFFFAOYSA-N 0.000 claims description 2
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 claims description 2
- MZZUATUOLXMCEY-UHFFFAOYSA-N cobalt manganese Chemical compound [Mn].[Co] MZZUATUOLXMCEY-UHFFFAOYSA-N 0.000 claims description 2
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 claims description 2
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910010941 LiFSI Inorganic materials 0.000 claims 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 claims 1
- 125000001889 triflyl group Chemical group FC(F)(F)S(*)(=O)=O 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 abstract description 18
- 210000001787 dendrite Anatomy 0.000 abstract description 13
- 238000007086 side reaction Methods 0.000 abstract description 8
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 229940021013 electrolyte solution Drugs 0.000 description 24
- 238000002360 preparation method Methods 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 16
- 239000004743 Polypropylene Substances 0.000 description 16
- 229920001155 polypropylene Polymers 0.000 description 16
- 239000007772 electrode material Substances 0.000 description 13
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 11
- 208000028659 discharge Diseases 0.000 description 11
- 239000002033 PVDF binder Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 10
- 239000006182 cathode active material Substances 0.000 description 9
- 239000004698 Polyethylene Substances 0.000 description 8
- 229920000573 polyethylene Polymers 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 239000005038 ethylene vinyl acetate Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910052759 nickel Inorganic materials 0.000 description 7
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 6
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 6
- 229910000733 Li alloy Inorganic materials 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 239000001989 lithium alloy Substances 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 229910052719 titanium Inorganic materials 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- 229910052582 BN Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 5
- 239000011572 manganese Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 description 4
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 239000011149 active material Substances 0.000 description 4
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- VUPKGFBOKBGHFZ-UHFFFAOYSA-N dipropyl carbonate Chemical compound CCCOC(=O)OCCC VUPKGFBOKBGHFZ-UHFFFAOYSA-N 0.000 description 4
- QKBJDEGZZJWPJA-UHFFFAOYSA-N ethyl propyl carbonate Chemical compound [CH2]COC(=O)OCCC QKBJDEGZZJWPJA-UHFFFAOYSA-N 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 3
- 229910004406 Li(Ni0.6Mn0.2CO0.2)O2 Inorganic materials 0.000 description 3
- SOXUFMZTHZXOGC-UHFFFAOYSA-N [Li].[Mn].[Co].[Ni] Chemical compound [Li].[Mn].[Co].[Ni] SOXUFMZTHZXOGC-UHFFFAOYSA-N 0.000 description 3
- 239000006183 anode active material Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 238000003851 corona treatment Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- QLZJUIZVJLSNDD-UHFFFAOYSA-N 2-(2-methylidenebutanoyloxy)ethyl 2-methylidenebutanoate Chemical compound CCC(=C)C(=O)OCCOC(=O)C(=C)CC QLZJUIZVJLSNDD-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- JWUJQDFVADABEY-UHFFFAOYSA-N 2-methyltetrahydrofuran Chemical compound CC1CCCO1 JWUJQDFVADABEY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- 229910003936 Li(Ni0.5Mn0.3Co0.2)O2 Inorganic materials 0.000 description 2
- 229910004437 Li(Ni0.8Mn0.1Co0.1)O2 Inorganic materials 0.000 description 2
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 2
- 229910014689 LiMnO Inorganic materials 0.000 description 2
- 229910013716 LiNi Inorganic materials 0.000 description 2
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920006226 ethylene-acrylic acid Polymers 0.000 description 2
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 2
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- ZIRAMZRKLHPLPK-UHFFFAOYSA-N lithium fluorosulfonyl(trifluoromethylsulfonyl)azanide Chemical compound FS(=O)(=O)[N-]S(=O)(=O)C(F)(F)F.[Li+] ZIRAMZRKLHPLPK-UHFFFAOYSA-N 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 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 2
- 239000000463 material Substances 0.000 description 2
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- UCUUFSAXZMGPGH-UHFFFAOYSA-N penta-1,4-dien-3-one Chemical class C=CC(=O)C=C UCUUFSAXZMGPGH-UHFFFAOYSA-N 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 1
- YEVQZPWSVWZAOB-UHFFFAOYSA-N 2-(bromomethyl)-1-iodo-4-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=CC=C(I)C(CBr)=C1 YEVQZPWSVWZAOB-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
두께 (㎛) | 기공크기 (nm) | 기공도(%) | 통기도 (s/100cc) |
접촉각 | |
제조에 1 | 10 | 41 | 53 | 120 | 87 |
제조예 2 | 10 | 43 | 50 | 135 | 81 |
제조예 4 | 10 | 35 | 40 | 150 | 7 |
제조예 5 | 10 | 37 | 35 | 201 | 0 |
보호층 | |
실시예 1 | 제조예 4 |
실시예 2 | 제조예 5 |
비교예 1 | 없음 |
비교예 2 | BN/PVDF |
비교예 3 | 제조예 1 |
비교예 4 | 제조예 2 |
초기 방전 용량(mAh) | 방전용량유지율 80%에서의 사이클 수 | |
실시예 1 | 125 | 92 |
실시예 2 | 126 | 110 |
비교예 1 | 128 | 30 |
비교예 2 | 126 | 54 |
비교예 3 | 122 | 82 |
비교예 4 | 121 | 71 |
Claims (14)
- 양극, 음극, 상기 양극과 음극 사이에 개재되는 분리막, 및 전해액을 포함하는 리튬 이차전지로서,
상기 음극은, 집전체, 친수성으로 표면 개질된 다공성 폴리올레핀 필름 보호층, 및 선택적으로 상기 집전체와 보호층 사이에 개재되는 리튬 금속층을 포함하고,
상기 다공성 폴리올레핀 필름 보호층은, 그 표면에 플라즈마 처리에 의해 친수성을 갖는 층을 포함하고, 프로필렌카보네이트와 디메틸카보네이트가 3:7 부피비로 혼합된 혼합 용매에 LiFSI를 3.5 M 농도로 녹여 제조된 전해액에 대한 접촉각이 40°이하이며,
상기 전해액은 유기용매 및 리튬염을 포함하되, 상기 리튬염을 2 M 내지 7 M 농도로 포함하는 것인, 리튬 이차전지. - 양극, 음극, 상기 양극과 음극 사이에 개재되는 분리막, 및 전해액을 포함하는 리튬 이차전지로서,
상기 음극은, 집전체, 친수성으로 표면 개질된 다공성 폴리올레핀 필름 보호층, 및 선택적으로 상기 집전체와 보호층 사이에 개재되는 리튬 금속층을 포함하고,
상기 다공성 폴리올레핀은 올레핀계 단량체와 극성 단량체가 공중합된 공중합체이고,
상기 다공성 폴리올레핀 필름 보호층은, 프로필렌카보네이트와 디메틸카보네이트가 3:7 부피비로 혼합된 혼합 용매에 LiFSI를 3.5 M 농도로 녹여 제조된 전해액에 대한 접촉각이 40°이하이며,
상기 전해액은 유기용매 및 리튬염을 포함하되, 상기 리튬염을 2 M 내지 7 M 농도로 포함하는 것인, 리튬 이차전지. - 제2항에 있어서,
상기 다공성 폴리올레핀 필름 보호층은 그 표면에 플라즈마 처리에 의해 친수성을 갖는 층을 포함하는, 리튬 이차전지. - 제1항에 있어서,
상기 다공성 폴리올레핀은 올레핀계 단량체로부터 중합된 중합체인, 리튬 이차전지. - 제2항 또는 제4항에 있어서,
상기 올레핀계 단량체는, 에틸렌, 프로필렌, 1-부텐, 1,3-부타디엔, 1-펜텐, 4-메틸-1-펜텐, 1-헥센, 1-헵텐, 1-옥텐, 1-데센, 1-도데센, 1-테트라데센, 1-헥사데센, 1-옥타데센, 및 1-에이코센으로 이루어지는 군에서 선택되는 1종 이상인, 리튬 이차전지. - 제2항에 있어서,
상기 극성 단량체는, 불포화 카르복실산 및 이들의 유도체; 스티렌 유도체; (메트)아크릴아미드 및 이들의 유도체; 아크릴로니트릴 및 이들의 유도체; 및 탄소수 1 내지 6의 알킬비닐케톤으로 이루어지는 군에서 선택되는 1종 이상인, 리튬 이차전지. - 제2항에 있어서,
상기 극성 단량체는 (메트)아크릴산, 비닐 아세테이트, 메틸(메트)아크릴레이트, 에틸(메트)아크릴레이트, 부틸(메트)아크릴레이트, 스티렌, 알파-메틸스티렌, 아크릴로니트릴, 및 메틸비닐케톤으로 이루어지는 군에서 선택되는 1종 이상인, 리튬 이차전지. - 제1항 또는 제2항에 있어서,
상기 다공성 폴리올레핀 필름의 통기도는 300 sec/100cc 이하인, 리튬 이차전지. - 제1항 또는 제2항에 있어서,
상기 다공성 폴리올레핀 필름 보호층의 두께는 1 내지 30 ㎛인, 리튬 이차전지. - 제1항 또는 제2항에 있어서,
상기 다공성 폴리올레핀 필름 보호층의 기공 크기는 10 내지 1000 nm 이고, 기공도는 20 내지 80 %인, 리튬 이차전지. - 제1항 또는 제2항에 있어서,
상기 유기용매는 카보네이트계 용매, 에테르계 용매, 포스페이트계 용매, 또는 이들의 조합인, 리튬 이차전지. - 제1항 또는 제2항에 있어서,
상기 리튬염은 LiPF6, LiBF4, LiSbF6, LiAsF6, LiC4F9SO3, LiClO4, LiAlO2, LiAlCl4, LiN(CxF2x+1SO2)(CyF2y+1SO2)(여기서, x 및 y는 자연수임), LiCl, LiI, LiB(C2O4)2, 리튬비스(플루오로술포닐)이미드, 리튬비스(트리플루오로메탄술포닐)이미드, 리튬비스(퍼플루오로에틸설포닐)이미드, 리튬(플루오로설포닐)(노나플루오로부탄설포닐)이미드, 리튬(플루오로설포닐)트리플루오로메탄설포닐)이미드, 또는 이들의 조합인, 리튬 이차전지. - 제1항 또는 제2항에 있어서,
상기 양극은 리튬-망간계 산화물, 리튬-코발트계 산화물, 리튬-니켈계 산화물, 리튬-니켈-망간계 산화물, 리튬-니켈-코발트계 산화물, 리튬-망간-코발트계 산화물, 및 리튬-니켈-망간-코발트계 산화물로 이루어지는 군에서 선택되는 1종 이상의 양극 활물질을 포함하는 것인, 리튬 이차전지. - 제1항 또는 제2항에 있어서,
상기 양극은 니켈-코발트-망간계 양극 활물질을 포함하는 것인, 리튬 이차전지.
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ES3008021T3 (en) | 2025-03-21 |
EP3806198A4 (en) | 2021-09-29 |
CN112368860A (zh) | 2021-02-12 |
CN112368860B (zh) | 2024-10-18 |
KR20200131751A (ko) | 2020-11-24 |
HUE070088T2 (hu) | 2025-05-28 |
US20210273292A1 (en) | 2021-09-02 |
US11984616B2 (en) | 2024-05-14 |
EP3806198B1 (en) | 2025-01-01 |
EP3806198A1 (en) | 2021-04-14 |
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