WO2018078704A1 - セパレータ、およびセパレータを含む二次電池 - Google Patents
セパレータ、およびセパレータを含む二次電池 Download PDFInfo
- Publication number
- WO2018078704A1 WO2018078704A1 PCT/JP2016/081481 JP2016081481W WO2018078704A1 WO 2018078704 A1 WO2018078704 A1 WO 2018078704A1 JP 2016081481 W JP2016081481 W JP 2016081481W WO 2018078704 A1 WO2018078704 A1 WO 2018078704A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- separator
- secondary battery
- positive electrode
- weight
- Prior art date
Links
- 229920000098 polyolefin Polymers 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 abstract description 11
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 145
- 239000011148 porous material Substances 0.000 description 33
- 239000008151 electrolyte solution Substances 0.000 description 27
- 238000012360 testing method Methods 0.000 description 27
- -1 ethylene, propylene, 1-butene Chemical class 0.000 description 22
- 239000000945 filler Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 21
- 238000005096 rolling process Methods 0.000 description 20
- 239000007774 positive electrode material Substances 0.000 description 19
- 229920001577 copolymer Polymers 0.000 description 18
- 239000007773 negative electrode material Substances 0.000 description 18
- 239000002904 solvent Substances 0.000 description 17
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 14
- 239000000126 substance Substances 0.000 description 13
- 239000004698 Polyethylene Substances 0.000 description 12
- 239000003792 electrolyte Substances 0.000 description 12
- 229910052744 lithium Inorganic materials 0.000 description 11
- 229920000573 polyethylene Polymers 0.000 description 11
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 10
- 150000002500 ions Chemical class 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 239000002131 composite material Substances 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 8
- 238000009998 heat setting Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000003960 organic solvent Substances 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical group [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 239000000654 additive Substances 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000001993 wax Substances 0.000 description 6
- 239000002033 PVDF binder Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- 230000010220 ion permeability Effects 0.000 description 5
- 239000011255 nonaqueous electrolyte Substances 0.000 description 5
- 229920005672 polyolefin resin Polymers 0.000 description 5
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000011342 resin composition Substances 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 4
- 230000003078 antioxidant effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- MHSKRLJMQQNJNC-UHFFFAOYSA-N terephthalamide Chemical compound NC(=O)C1=CC=C(C(N)=O)C=C1 MHSKRLJMQQNJNC-UHFFFAOYSA-N 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000004760 aramid Substances 0.000 description 3
- 229920003235 aromatic polyamide Polymers 0.000 description 3
- 229910021383 artificial graphite Inorganic materials 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000002482 conductive additive Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 229910003002 lithium salt Inorganic materials 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 229910021382 natural graphite Inorganic materials 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000006259 organic additive Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 229910012748 LiNi0.5Mn0.3Co0.2O2 Inorganic materials 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 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 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910001593 boehmite Inorganic materials 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000011086 high cleaning Methods 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 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
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002736 nonionic surfactant Substances 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical group 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 2
- 239000004711 α-olefin Substances 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- FSSPGSAQUIYDCN-UHFFFAOYSA-N 1,3-Propane sultone Chemical compound O=S1(=O)CCCO1 FSSPGSAQUIYDCN-UHFFFAOYSA-N 0.000 description 1
- DOMLQXFMDFZAAL-UHFFFAOYSA-N 2-methoxycarbonyloxyethyl methyl carbonate Chemical compound COC(=O)OCCOC(=O)OC DOMLQXFMDFZAAL-UHFFFAOYSA-N 0.000 description 1
- JWUJQDFVADABEY-UHFFFAOYSA-N 2-methyltetrahydrofuran Chemical compound CC1CCCO1 JWUJQDFVADABEY-UHFFFAOYSA-N 0.000 description 1
- VWIIJDNADIEEDB-UHFFFAOYSA-N 3-methyl-1,3-oxazolidin-2-one Chemical compound CN1CCOC1=O VWIIJDNADIEEDB-UHFFFAOYSA-N 0.000 description 1
- FZXVVMPYCPCKGU-UHFFFAOYSA-N 4-(3-chloro-7-azabicyclo[2.2.1]hepta-1,3,5-triene-7-carbonyl)benzamide Chemical compound C1=CC(C(=O)N)=CC=C1C(=O)N1C2=CC=C1C=C2Cl FZXVVMPYCPCKGU-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229910017115 AlSb Inorganic materials 0.000 description 1
- 229910000873 Beta-alumina solid electrolyte Inorganic materials 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910018122 Li 3-x M Inorganic materials 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910010238 LiAlCl 4 Inorganic materials 0.000 description 1
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910013684 LiClO 4 Inorganic materials 0.000 description 1
- 229910012513 LiSbF 6 Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- 229910021314 NaFeO 2 Inorganic materials 0.000 description 1
- 229910005881 NiSi 2 Inorganic materials 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 229920002614 Polyether block amide Polymers 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 description 1
- GRQJZSJOACLQOV-UHFFFAOYSA-N [Li].[N] Chemical class [Li].[N] GRQJZSJOACLQOV-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- JBDAPRHNHMFGAN-UHFFFAOYSA-N carbamic acid N,N-dimethylacetamide Chemical class NC(O)=O.CN(C)C(C)=O JBDAPRHNHMFGAN-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 1
- 150000001786 chalcogen compounds Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 description 1
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 229920001002 functional polymer Polymers 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 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
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- QZUPTXGVPYNUIT-UHFFFAOYSA-N isophthalamide Chemical compound NC(=O)C1=CC=CC(C(N)=O)=C1 QZUPTXGVPYNUIT-UHFFFAOYSA-N 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229940057995 liquid paraffin Drugs 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001955 polyphenylene ether Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 238000007586 pull-out test Methods 0.000 description 1
- 239000002296 pyrolytic carbon Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000004441 surface measurement Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229920006259 thermoplastic polyimide Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/26—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- 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
- H01M10/052—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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/417—Polyolefins
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/457—Separators, membranes or diaphragms characterised by the material having a layered structure comprising three or more layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/491—Porosity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/06—Coating on the layer surface on metal layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/24—Organic non-macromolecular coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/28—Multiple coating on one surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/104—Oxysalt, e.g. carbonate, sulfate, phosphate or nitrate particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/718—Weight, e.g. weight per square meter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/10—Batteries
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
- C08J2201/044—Elimination of an inorganic solid phase
- C08J2201/0444—Salts
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- One embodiment of the present invention relates to a separator and a secondary battery including the separator.
- one embodiment of the present invention relates to a separator that can be used in a non-aqueous electrolyte secondary battery and a non-aqueous electrolyte secondary battery including the separator.
- a typical example of a non-aqueous electrolyte secondary battery is a lithium ion secondary battery.
- Lithium ion secondary batteries have a high energy density, and are therefore widely used in electronic devices such as personal computers, mobile phones, and portable information terminals.
- the lithium ion secondary battery has a positive electrode, a negative electrode, an electrolytic solution filled between the positive electrode and the negative electrode, and a separator.
- the separator functions as a membrane that separates the positive electrode and the negative electrode and allows the electrolyte and carrier ions to pass therethrough.
- Patent Documents 1 to 3 disclose separators containing polyolefin.
- JP 2015-120835 A Japanese Patent No. 5164296 JP 2012-227066 A
- One of the objects of the present invention is to provide a separator that can be used in a secondary battery such as a non-aqueous electrolyte secondary battery, and a secondary battery including the separator.
- an object of the present invention is to provide a separator that can be manufactured with a high yield and that suppresses deterioration of battery characteristics when repeated charging and discharging, and a secondary battery including the separator. Is to provide.
- One embodiment of the present invention is a separator having a first layer made of porous polyolefin. After impregnating the first layer with N-methylpyrrolidone containing 3% by weight of water, when the first layer is irradiated with microwaves having a frequency of 2455 MHz at an output of 1800 W, the temperature rise convergence time of the first layer is A sphere having a diameter of 14.3 mm and a weight of 11.9 g placed on the first layer is free with respect to the first layer and is 2.9 s ⁇ m 2 / g or more and 5.7 s ⁇ m 2 / g or less. When dropped, the minimum height of the sphere that the first layer tears is 50 cm or more and 150 cm or less.
- a separator that not only has excellent slipperiness and cutting workability but also provides a secondary battery in which deterioration of battery characteristics when charging and discharging are repeated is suppressed.
- a secondary battery including the same can be provided.
- the cross-sectional schematic diagram of the secondary battery of one Embodiment of this invention, and a separator The figure which shows the jig
- the expression “substantially containing only A” includes a substance other than A, a state containing A and impurities, and a substance other than A due to measurement error. This includes situations that are mistaken for When this expression indicates a state containing A and impurities, there is no limitation on the type and concentration of impurities.
- the secondary battery 100 includes a positive electrode 110, a negative electrode 120, and a separator 130 that separates the positive electrode 110 and the negative electrode 120.
- the secondary battery 100 has an electrolytic solution 140.
- the electrolyte solution 140 is present mainly in the gaps between the positive electrode 110, the negative electrode 120, and the separator 130 and in the gaps between the members.
- the positive electrode 110 may include a positive electrode current collector 112 and a positive electrode active material layer 114.
- the negative electrode 120 can include a negative electrode current collector 122 and a negative electrode active material layer 124.
- the secondary battery 100 further includes a housing, and the positive electrode 110, the negative electrode 120, the separator 130, and the electrolytic solution 140 are held by the housing.
- the separator 130 is a film that is provided between the positive electrode 110 and the negative electrode 120, separates the positive electrode 110 and the negative electrode 120, and carries the movement of the electrolyte solution 140 within the secondary battery 100.
- FIG. 1B is a schematic cross-sectional view of the separator 130.
- the separator 130 has the 1st layer 132 containing porous polyolefin, and can further have the porous layer 134 as arbitrary structures. As shown in FIG. 1B, the separator 130 may have a structure in which two porous layers 134 sandwich the first layer 132. However, the separator 130 is porous only on one surface of the first layer 132.
- the layer 134 may be provided, or the porous layer 134 may not be provided.
- the first layer 132 may have a single-layer structure or may include a plurality of layers.
- the first layer 132 has pores connected to the inside. Due to this structure, the electrolyte solution 140 can pass through the first layer 132, and carrier ions such as lithium ions can move through the electrolyte solution 140. At the same time, physical contact between the positive electrode 110 and the negative electrode 120 is prohibited. On the other hand, when the secondary battery 100 reaches a high temperature, the first layer 132 melts and becomes nonporous, thereby stopping the movement of carrier ions. This operation is called shutdown. By this operation, heat generation and ignition due to a short circuit between the positive electrode 110 and the negative electrode 120 are prevented, and high safety can be ensured.
- the first layer 132 includes porous polyolefin.
- the first layer 132 may be made of porous polyolefin. That is, the first layer 132 may be configured to include only porous polyolefin or substantially only porous polyolefin.
- the porous polyolefin can contain an additive.
- the first layer 132 may be composed of only a polyolefin and an additive, or substantially only a polyolefin and an additive.
- the porous polyolefin contains an additive, the polyolefin can be contained in the porous polyolefin with a composition of 95% by weight or more, or 97% by weight or more.
- the polyolefin may be included in the first layer 132 with a composition of 95% by weight or more, or 97% by weight or more.
- the additive include an organic compound (organic additive), and the organic compound may be an antioxidant (organic antioxidant) or a lubricant.
- Examples of the polyolefin constituting the porous polyolefin include homopolymers obtained by polymerizing ⁇ -olefins such as ethylene, propylene, 1-butene, 4-methyl-1-pentene and 1-hexene, and copolymers thereof. be able to.
- the first layer 132 may contain a mixture of these homopolymers and copolymers.
- the organic additive can have a function of preventing oxidation of the polyolefin.
- phenols and phosphates can be used as the organic additive.
- Phenols having a bulky substituent at the ⁇ -position and / or ⁇ -position of the phenolic hydroxyl group may be used.
- Typical examples of the polyolefin include a polyethylene polymer.
- a polyethylene polymer either low density polyethylene or high density polyethylene may be used.
- a copolymer of ethylene and ⁇ -olefin may be used.
- These polymers or copolymers may be a high molecular weight body having a weight average molecular weight of 100,000 or more, or an ultrahigh molecular weight body having a weight average molecular weight of 1,000,000 or more.
- the shutdown function can be expressed at a lower temperature, and high safety can be imparted to the secondary battery 100.
- the thickness of the first layer 132 can be 4 ⁇ m or more and 40 ⁇ m or less, 5 ⁇ m or more and 30 ⁇ m or less, or 6 ⁇ m or more and 15 ⁇ m or less.
- the basis weight of the first layer 132 may be appropriately determined in consideration of strength, film thickness, weight, and handleability. For example, 4 g / m 2 or more and 20 g / m 2 or less, 4 g / m 2 or more and 12 g / m 2 or less, or 5 g / m 2 or more so that the weight energy density and volume energy density of the secondary battery 100 can be increased. It can be 10 g / m 2 or less.
- the basis weight is the weight per unit area.
- the air permeability of the first layer 132 can be selected from the range of 30 s / 100 mL to 500 s / 100 mL, or 50 s / 100 mL to 300 s / 100 mL in terms of Gurley value. Thereby, sufficient ion permeability can be obtained.
- the porosity of the first layer 132 is 20 volume% or more and 80 volume% or less, 20 volume% or more and 75 volume% or less, 20 volume so that the retention amount of the electrolytic solution 140 is increased and the shutdown function can be expressed more reliably. % To 55% by volume, 30% to 55% by volume, or 40% to 55% by volume. Further, the pore diameter (average pore diameter) of the first layer 132 is 0.01 ⁇ m or more and 0.3 ⁇ m or less, or 0.01 ⁇ m or more and 0 or more so that sufficient ion permeability and a high shutdown function can be obtained. It can be selected from the range of 14 ⁇ m or less.
- the first layer 132 is impregnated with N-methylpyrrolidone containing 3% by weight of water, and then the time per unit area until the temperature rises when the microwave with a frequency of 2455 MHz is irradiated at an output of 1800 W (hereinafter referred to as the basis weight).
- the temperature rise convergence time is 2.9 s ⁇ m 2 / g or more and 5.7 s ⁇ m 2 / g or less, or 2.9 s ⁇ m 2 / g or more and 5.3 s ⁇ m 2 / g or less.
- the minimum height of the sphere in the falling ball test is not less than 50 cm and not more than 150 cm.
- the inventors used the separator 130 including the first layer 132 that satisfies the above characteristics, thereby suppressing a decrease in battery characteristics when charging and discharging were repeated. It has been found that can be manufactured with good yield.
- the structure of the pores of the first layer 132 (capillary force in the pores and the area of the walls of the pores), and the ability to supply the electrolytic solution 140 from the first layer 132 to the electrodes (the positive electrode 110 and the negative electrode 120) Is related to the deterioration of battery characteristics when the battery is repeatedly charged and discharged or operated with a large current.
- the electrode expands.
- the negative electrode 120 expands during charging
- the positive electrode 110 expands during discharging. Therefore, the electrolytic solution 140 contained in the first layer 132 is pushed out from the expanding electrode side to the opposing electrode side. With such a mechanism, the electrolytic solution 140 moves in the pores of the first layer 132 during the charge / discharge cycle.
- the wall surfaces of the pores are subjected to pressure by the electrolytic solution 140.
- the strength of the pressure is related to the pore structure. Specifically, it is considered that the pressure applied to the wall surface of the pore increases as the capillary force increases, and increases as the area of the wall surface of the pore increases. Further, the strength of the pressure is also related to the amount of the electrolytic solution 140 that moves in the pores, and is considered to increase when the amount of the moving electrolytic solution 140 is large, that is, when the secondary battery 100 is operated with a large current. .
- the pressure increases, the wall surface is deformed so as to close the pores by the pressure, and as a result, the battery output characteristics are deteriorated. For this reason, battery characteristics are gradually deteriorated by repeatedly charging / discharging the secondary battery 100 or operating it with a large current.
- N-methylpyrrolidone containing water when N-methylpyrrolidone containing water is irradiated with microwaves, heat is generated by vibration energy of water. The generated heat is transferred to the first layer 132 in contact with N-methylpyrrolidone.
- the temperature rise of N-methylpyrrolidone converges when the heat release rate and the heat release rate due to heat transfer to the first layer 132 reach equilibrium. Therefore, the time until the temperature rise converges (temperature rise convergence time) is related to the degree of contact between the solvent contained in the first layer 132 (here, N-methylpyrrolidone containing water) and the first layer 132. To do.
- the degree of this contact is closely related to the capillary force in the pores of the first layer 132 and the area of the pore walls
- the structure of the pores of the first layer 132 depends on the temperature rise convergence time. Can be evaluated. Specifically, as the temperature rise convergence time is shorter, the capillary force in the pore is larger and the area of the pore wall is larger.
- the degree of this contact increases as the electrolyte easily moves in the pores of the first layer 132. Therefore, the ability to supply the electrolytic solution 140 from the first layer 132 to the positive electrode 110 or the negative electrode 120 can be evaluated based on the temperature rise convergence time. Specifically, the supply capability of the electrolytic solution 140 is higher as the temperature rise convergence time is shorter.
- the capillary force in the pores of the first layer 132 and the area of the pore walls are too large.
- the pressure applied to the walls of the pores by the electrolytic solution 140 that moves in the pores increases and the pores are blocked.
- the temperature rise convergence time exceeds 5.7 s ⁇ m 2 / g
- the solvent becomes difficult to move in the pores of the first layer 132 and the moving speed of the electrolytic solution 140 is reduced in the vicinity of the electrode.
- the battery characteristics of the battery are degraded.
- the internal resistance of the secondary battery 100 increases, the battery characteristics after repeated charging and discharging are deteriorated, and the output characteristics are deteriorated.
- the temperature rise convergence time is 2.9 s ⁇ m 2 / g or more and 5.7 s ⁇ m 2 / g or less, or 2.9 s ⁇ m 2 / g or more and 5.3 s ⁇ m 2 / g or less.
- the separator 130 that can suppress deterioration in battery characteristics when charging and discharging are repeated.
- the separator 130 is cut into a predetermined size. If tearing occurs in an unintended direction during cutting, the yield of the secondary battery is reduced. Further, when a wound type secondary battery is manufactured using the separator 130, the separator 130 and the electrode (the positive electrode 110 and the negative electrode 120) are wound around a cylindrical member (hereinafter, referred to as a pin), and then the pin is removed. At this time, if the friction between the separator 130 and the pin is large, the pin cannot be easily pulled out, and the separator 130, the electrode, or the pin is destroyed. As a result, the manufacturing process is adversely affected and the yield of the secondary battery is reduced. To do.
- the separator 130 can be selectively cut only in the intended direction by configuring the first layer 132 so that the minimum height of the ball in the falling ball test is 50 cm or more and 150 cm or less. And it was found that the friction with the pin can be reduced.
- the falling ball test is an evaluation test performed as follows.
- a sphere having a diameter of 14.3 mm, a weight of 11.9 g, and a mirror surface is freely dropped from the height h onto the first layer 132.
- the height h is the distance between the first layer 132 and the sphere immediately before starting free fall.
- the minimum value of the height h at which the first layer 132 is torn is the minimum height of the sphere.
- the first layer 132 is obtained by a rolling process as will be described later.
- a hard and brittle skin layer is formed on the surface during the rolling process.
- a difference in orientation occurs in the rolling direction. Specifically, there is a difference in orientation in the flow direction in the rolling process (Machine Direction, also referred to as a machine direction; hereinafter referred to as MD) and in the width direction (also referred to as a Transverse Direction, also referred to as lateral direction, hereinafter referred to as TD).
- MD Machine Direction
- TD Transverse Direction
- Arise Rolling only to TD strengthens the orientation of TD
- rolling only to MD strengthens the orientation of MD.
- the ratio of the skin layer and the MD-TD orientation balance are related to the tearing of the first layer 132.
- the orientation is biased to either MD or TD, tearing is likely to occur along the direction of stronger orientation, and friction in the direction perpendicular to the direction of stronger orientation is large. Become. Therefore, the ratio of the skin layer and the orientation balance of MD and TD affect the cutting processability and frictional force of the first layer 132.
- the present inventors have found that the larger the minimum height of the ball in the falling ball test, the smaller the ratio of the skin layer and the smaller the orientation difference between MD and TD. And it turned out that generation
- the minimum height In order to make the minimum height larger than 150 cm, it is necessary to increase the thickness of the first layer 132 or lower the porosity. However, increasing the thickness decreases the energy density of the secondary battery, and decreasing the porosity decreases the battery characteristics. For this reason, the minimum height is preferably 150 cm or less.
- the temperature rise convergence time is 2.9 s ⁇ m 2 / g or more and 5.7 s ⁇ m 2 / g or less, or 2.9 s ⁇ m 2 / g or more and 5.3 s ⁇ m 2 / g or less, and
- the separator 130 including the first layer 132 in which the minimum height of the drop test sphere is 50 cm or more and 150 cm or less the secondary battery 100 with a small deterioration in battery characteristics can be provided at low cost.
- the positive electrode 110 may include the positive electrode current collector 112 and the positive electrode active material layer 114.
- the negative electrode 120 can include a negative electrode current collector 122 and a negative electrode active material layer 124 (see FIG. 1A).
- the positive electrode current collector 112 and the negative electrode current collector 122 have a function of holding the positive electrode active material layer 114 and the negative electrode active material layer 124 and supplying current to the positive electrode active material layer 114 and the negative electrode active material layer 124, respectively.
- the positive electrode current collector 112 and the negative electrode current collector 122 for example, a metal such as nickel, stainless steel, copper, titanium, tantalum, zinc, iron, cobalt, or an alloy containing these metals such as stainless steel can be used. .
- the positive electrode current collector 112 and the negative electrode current collector 122 may have a structure in which a plurality of films containing these metals are stacked.
- the positive electrode active material layer 114 and the negative electrode active material layer 124 each include a positive electrode active material and a negative electrode active material.
- the positive electrode active material and the negative electrode active material are materials responsible for the release and absorption of carrier ions such as lithium ions.
- the positive electrode active material examples include materials that can be doped / undoped with carrier ions.
- a lithium composite oxide containing at least one transition metal such as vanadium, manganese, iron, cobalt, or nickel can be given.
- such composite oxides include lithium composite oxides having an ⁇ -NaFeO 2 type structure such as lithium nickelate and lithium cobaltate, and lithium composite oxides having a spinel type structure such as lithium manganese spinel. These composite oxides have a high average discharge potential.
- the lithium composite oxide may contain other metal elements, for example, titanium, zirconium, cerium, yttrium, vanadium, chromium, manganese, iron, cobalt, copper, silver, magnesium, aluminum, gallium, indium, tin, etc.
- composite lithium nickelate containing aluminum or manganese and having nickel of 85 mol% or more, or 90 mol% or more can be used as the positive electrode active material.
- a material that can be doped / undoped with carrier ions can be used as the negative electrode active material.
- lithium metal or a lithium alloy can be used.
- carbonaceous materials such as graphite such as natural graphite and artificial graphite, coke, carbon black, and burned polymer compound such as carbon fiber; oxide that performs doping and dedoping of lithium ions at a lower potential than the positive electrode, Chalcogen compounds such as sulfides; elements such as aluminum, lead, tin, bismuth and silicon that are alloyed or combined with alkali metals; cubic intermetallic compounds (AlSb, Mg that can insert alkali metals between lattices) 2 Si, NiSi 2); lithium nitrogen compounds (Li 3-x M x N (M: transition metal)) and the like can be used.
- carbonaceous materials mainly composed of graphite such as natural graphite and artificial graphite have high potential flatness and low average discharge potential, and therefore give a large energy density when combined with the positive electrode 110.
- carbonaceous materials mainly composed of graphite such as natural graphite and artificial graphite have high potential flatness and low average discharge potential, and therefore give a large energy density when combined with the positive electrode 110.
- a mixture of graphite and silicon having a silicon to carbon ratio of 5 mol% or more or 10 mol% or more can be used as the negative electrode active material.
- the positive electrode active material layer 114 and the negative electrode active material layer 124 may each include a conductive additive, a binder, and the like in addition to the positive electrode active material and the negative electrode active material.
- Examples of conductive aids include carbonaceous materials. Specific examples include graphite such as natural graphite and artificial graphite, coke, carbon black, pyrolytic carbon, and fired organic polymer compound such as carbon fiber. A plurality of the above materials may be mixed and used as a conductive aid.
- PVDF polyvinylidene fluoride
- vinylidene fluoride-hexafluoropropylene copolymer tetrafluoroethylene-hexafluoropropylene copolymer
- tetrafluoroethylene-perfluoroalkyl vinyl ether Copolymer ethylene-tetrafluoroethylene copolymer, vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene copolymer, etc.
- copolymers using vinylidene fluoride as one of the monomers thermoplastic polyimide
- thermoplastic resins such as polyethylene and polypropylene, acrylic resins, and styrene-butadiene rubber. Note that the binder also has a function as a thickener.
- the positive electrode 110 can be formed, for example, by applying a mixture of a positive electrode active material, a conductive additive, and a binder onto the positive electrode current collector 112. In this case, a solvent may be used to create or apply the mixture. Alternatively, the positive electrode 110 may be formed by pressurizing and molding a mixture of the positive electrode active material, the conductive additive, and the binder, and placing the mixture on the positive electrode 110.
- the negative electrode 120 can also be formed by a similar method.
- the electrolytic solution 140 includes a solvent and an electrolyte, and at least a part of the electrolyte is dissolved in the solvent and ionized.
- the solvent water or an organic solvent can be used.
- an organic solvent is used.
- Organic solvents include carbonates such as ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, 1,2-di (methoxycarbonyloxy) ethane; 1,2-dimethoxyethane, 1,3-dimethoxypropane Ethers such as tetrahydrofuran, 2-methyltetrahydrofuran; esters such as methyl formate, methyl acetate and ⁇ -butyrolactone; nitriles such as acetonitrile and butyronitrile; amides such as N, N-dimethylformamide and N, N-dimethylacetamide Carbamates such as 3-methyl-2-oxazolidone; sulfur-containing compounds such as sulfolane, dimethyl sulfoxide and 1,3-propane sultone; and fluorine is introduced into the organic solvent. Such as fluorine-containing organic solvent and the like. A mixed solvent of these organic solvents may be used
- a typical electrolyte includes a lithium salt.
- a lithium salt For example, LiClO 4 , LiPF 6 , LiAsF 6 , LiSbF 6 , LiBF 4 , LiCF 3 SO 3 , LiN (CF 3 SO 2 ) 2 , LiC (CF 3 SO 2 ) 3 , Li 2 B 10 Cl 10 , carbon number 2 To 6 carboxylic acid lithium salts, LiAlCl 4 and the like. Only one type of lithium salt may be used, or two or more types may be combined.
- the electrolyte sometimes refers to a solution in which the electrolyte is dissolved in a broad sense, but the narrow meaning is adopted in the present specification and claims. That is, the electrolyte is a solid, is ionized by being dissolved in a solvent, and is treated as giving ion conductivity to the resulting solution.
- a negative electrode 120, a separator 130, and a positive electrode 110 are arranged to form a stacked body.
- the laminate is installed in a housing (not shown), and the housing is filled with the electrolyte, and the housing is sealed while reducing the pressure, or the housing is sealed and then the housing is filled with the electrolyte and then sealed.
- the secondary battery 100 can be manufactured.
- the shape of the secondary battery 100 is not particularly limited, and may be a thin plate (paper) type, a disk type, a cylindrical type, a rectangular column type such as a rectangular parallelepiped, or the like.
- One of the methods for producing the first layer 132 is (1) a step of kneading an ultrahigh molecular weight polyethylene, a low molecular weight polyolefin having a weight average molecular weight of 10,000 or less, and a pore-forming agent to obtain a polyolefin composition, (2 ) A step of rolling a polyolefin composition with a rolling roll to form a sheet (rolling step), (3) a step of removing a hole forming agent from the sheet obtained in step (2), (4) step (3) The process of extending
- the pore-forming agent used in step (1) may contain an organic substance or an inorganic substance.
- the organic substance include a plasticizer.
- the plasticizer include low molecular weight hydrocarbons such as liquid paraffin.
- inorganic substances include inorganic materials that are soluble in neutral, acidic, or alkaline solvents, and examples include calcium carbonate, magnesium carbonate, and barium carbonate.
- inorganic compounds such as calcium chloride, sodium chloride, and magnesium sulfate can be used.
- water or a solution obtained by adding an acid or a base to an organic solvent can be used as the cleaning liquid.
- a surfactant may be added to the cleaning liquid.
- the addition amount of the surfactant can be arbitrarily selected in the range of 0.1 wt% to 15 wt%, or 0.1 wt% to 10 wt%. By selecting the addition amount from this range, it is possible to ensure high cleaning efficiency and prevent the surfactant from remaining.
- the washing temperature may be selected from a temperature range of 25 ° C. to 60 ° C., 30 ° C. to 55 ° C., or 35 ° C. to 50 ° C. Thereby, high cleaning efficiency can be obtained and evaporation of the cleaning liquid can be suppressed.
- the pore-forming agent may be removed using a cleaning solution, and then further washing with water may be performed.
- the temperature at the time of washing with water can be selected from a temperature range of 25 ° C. to 60 ° C., 30 ° C. to 55 ° C., or 35 ° C. to 50 ° C.
- the pore structure of the first layer 132 further includes the strain rate during stretching in the step (4) and the temperature of the heat setting treatment (annealing treatment) after stretching per unit thickness of the stretched film (after stretching). This is also affected by the heat setting temperature per unit thickness of the film (hereinafter referred to as heat setting temperature). Therefore, by adjusting the strain rate and the heat setting temperature, the pore structure of the first layer 132 can be controlled to satisfy the range of the temperature rise convergence time described in the first embodiment.
- the first layer 132 can be obtained by adjusting the strain rate and the heat setting temperature in the range inside the triangle with the three points as vertices.
- the porous layer 134 can be provided on one side or both sides of the first layer 132 (see FIG. 1B). When the porous layer 134 is stacked on one surface of the first layer 132, the porous layer 134 may be provided on the positive electrode 110 side or the negative electrode 120 side of the first layer 132.
- the porous layer 134 is preferably insoluble in the electrolytic solution 140 and contains an electrochemically stable material in the usage range of the secondary battery 100.
- materials include polyolefins such as polyethylene, polypropylene, polybutene, and ethylene-propylene copolymer; polyvinylidene fluoride (PVDF), polytetrafluoroethylene, vinylidene fluoride-hexafluoropropylene copolymer, tetrafluoroethylene, and the like.
- -Fluoropolymer such as hexafluoropropylene copolymer; aromatic polyamide (aramid); styrene-butadiene copolymer and its hydride, methacrylate ester copolymer, acrylonitrile-acrylate copolymer, styrene- Rubbers such as acrylate copolymer, ethylene propylene rubber, and polyvinyl acetate; polyphenylene ether, polysulfone, polyethersulfone, polyphenylene sulfide, polyether Polymers having a melting point or glass transition temperature of 180 ° C. or higher, such as polyvinylids, polyamideimides, polyether amides, and polyesters; A functional polymer.
- aromatic polyamide aromatic polyamide (aramid); styrene-butadiene copolymer and its hydride, methacrylate ester copolymer, acrylonitrile-acrylate copolymer, st
- Aromatic polyamides include, for example, poly (paraphenylene terephthalamide), poly (metaphenylene isophthalamide), poly (parabenzamide), poly (metabenzamide), poly (4,4′-benzanilide terephthalamide), poly (Paraphenylene-4,4′-biphenylenedicarboxylic acid amide), poly (metaphenylene-4,4′-biphenylenedicarboxylic acid amide), poly (paraphenylene-2,6-naphthalenedicarboxylic acid amide), poly (metaphenylene) -2,6-naphthalenedicarboxylic acid amide), poly (2-chloroparaphenylene terephthalamide), paraphenylene terephthalamide / 2,6-dichloroparaphenylene terephthalamide copolymer, metaphenylene terephthalamide / 2,6-dichloroparaphth Such as two-terephthalamide copolymer.
- the porous layer 134 may contain a filler.
- the filler include fillers made of organic or inorganic substances, but fillers made of inorganic substances called fillers are suitable, and silica, calcium oxide, magnesium oxide, titanium oxide, alumina, mica, zeolite, hydroxylated More preferred are fillers made of inorganic oxides such as aluminum and boehmite, at least one filler selected from the group consisting of silica, magnesium oxide, titanium oxide, aluminum hydroxide, boehmite and alumina is more preferred, and alumina is particularly preferred. .
- Alumina has many crystal forms such as ⁇ -alumina, ⁇ -alumina, ⁇ -alumina, and ⁇ -alumina, and any of them can be suitably used. Among these, ⁇ -alumina is most preferred because of its particularly high thermal stability and chemical stability. Only one type of filler may be used for the porous layer 134, or two or more types of fillers may be used in combination.
- the shape of the filler is not limited, and the filler can take a spherical shape, a cylindrical shape, an elliptical shape, a bowl shape, or the like. Alternatively, a filler in which these shapes are mixed may be used.
- the filler content can be 1% by volume or more and 99% by volume or less, or 5% by volume or more and 95% by volume or less of the porous layer 134.
- the thickness of the porous layer 134 can be selected in the range of 0.5 ⁇ m to 15 ⁇ m, or 2 ⁇ m to 10 ⁇ m. Therefore, when the porous layer 134 is formed on both surfaces of the first layer 132, the total film thickness of the porous layer 134 can be selected from a range of 1.0 ⁇ m to 30 ⁇ m, or 4 ⁇ m to 20 ⁇ m.
- the total film thickness of the porous layer 134 By setting the total film thickness of the porous layer 134 to 1.0 ⁇ m or more, an internal short circuit due to damage of the secondary battery 100 can be more effectively suppressed.
- the total film thickness of the porous layer 134 30 ⁇ m or less, it is possible to prevent an increase in the transmission resistance of carrier ions, and a deterioration of the positive electrode 110 due to an increase in the transmission resistance of carrier ions and a decrease in battery characteristics and cycle characteristics. Can be suppressed. Furthermore, an increase in the distance between the positive electrode 110 and the negative electrode 120 can be avoided, and the secondary battery 100 can be reduced in size.
- the basis weight of the porous layer 134 can be selected from a range of 1 g / m 2 to 20 g / m 2 , or 2 g / m 2 to 10 g / m 2 . Thereby, the weight energy density and volume energy density of the secondary battery 100 can be made high.
- the porosity of the porous layer 134 can be 20% to 90% by volume, or 30% to 80% by volume. Thereby, the porous layer 134 can have sufficient ion permeability.
- the average pore diameter of the pores of the porous layer 134 can be selected from the range of 0.01 ⁇ m or more and 1 ⁇ m or less, or 0.01 ⁇ m or more and 0.5 ⁇ m or less, whereby sufficient ions for the secondary battery 100 can be obtained. Transparency can be imparted and the shutdown function can be improved.
- the air permeability of the separator 130 including the first layer 132 and the porous layer 134 described above can be a Gurley value of 30 s / 100 mL to 1000 s / 100 mL, or 50 s / 100 mL to 800 s / 100 mL.
- the separator 130 can ensure sufficient strength and shape stability at high temperature, and at the same time have sufficient ion permeability.
- the temperature rise convergence time of the separator 130 including the first layer 132 and the porous layer 134 is 2.9 s ⁇ m 2 / g or more and 5.7 s ⁇ m 2 / g or less, or 2.9 s ⁇ m 2 / g. g or more and 5.3 s ⁇ m 2 / g or less, and the minimum height of the sphere in the falling ball test for the separator 130 may be 50 cm or more and 150 cm or less.
- a coating solution In the case of forming the porous layer 134 containing a filler, the above-described polymer or resin is dissolved or dispersed in a solvent, and then the filler is dispersed in the mixed solution (hereinafter referred to as a coating solution).
- Create Solvents include water; alcohols such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, and t-butyl alcohol; acetone, toluene, xylene, hexane, N-methylpyrrolidone, N, N-dimethylacetamide, N, And N-dimethylformamide. Only one type of solvent may be used, or two or more types of solvents may be used.
- a mechanical stirring method for example, a mechanical stirring method, an ultrasonic dispersion method, a high-pressure dispersion method, a media dispersion method, or the like may be applied.
- the filler after the filler is dispersed in the mixed solution, the filler may be wet pulverized using a wet pulverizer.
- additives such as a dispersing agent, a plasticizer, surfactant, and a pH adjuster
- the coating solution is applied onto the first layer 132.
- the coating liquid is directly applied to the first layer 132 by using a dip coating method, a spin coating method, a printing method, a spray method, or the like, and then the porous layer 134 is formed by removing the solvent. 132 can be formed.
- the coating liquid may not be directly formed on the first layer 132 but may be transferred onto the first layer 132 after being formed on another support.
- a resin film, a metal belt, a drum, or the like can be used as the support.
- any of natural drying, air drying, heat drying, and vacuum drying may be used.
- the solvent may be replaced with another solvent (for example, a low boiling point solvent) before drying.
- heating it can be carried out at 10 ° C. or higher and 120 ° C. or lower, or 20 ° C. or higher and 80 ° C. or lower. Thereby, it can avoid that the pore of the 1st layer 132 shrinks and air permeability falls.
- the thickness of the porous layer 134 can be controlled by the thickness of the coating film in a wet state after coating, the filler content, the concentration of polymer or resin, and the like.
- Example 1 > 68% by weight of ultra high molecular weight polyethylene powder (GUR2024, manufactured by Ticona), 32% by weight of polyethylene wax (FNP-0115, manufactured by Nippon Seiki Co., Ltd.) having a weight average molecular weight of 1000, and the total of the ultra high molecular weight polyethylene and polyethylene wax.
- GUR2024 manufactured by Ticona
- FNP-0115 polyethylene wax having a weight average molecular weight of 1000
- antioxidant As 100 parts by weight, antioxidant (Irg1010, manufactured by Ciba Specialty Chemicals) 0.4% by weight, (P168, manufactured by Ciba Specialty Chemicals) 0.1% by weight, sodium stearate 1.3% by weight
- calcium carbonate manufactured by Maruo Calcium Co., Ltd.
- the polyolefin resin composition was obtained by melt-kneading with a shaft kneader.
- the obtained polyolefin resin composition was subjected to the first rolling with R1, R2 and the second rolling with R2, R3 using three rolling rolls R1, R2, R3 having a surface temperature of 150 ° C., and the speed ratio was determined.
- the sheet was cooled stepwise (draw ratio (winding roll speed / rolling roll speed) 1.4 times) to prepare a sheet having a film thickness of about 64 ⁇ m.
- This sheet was immersed in hydrochloric acid (4 mol / L) containing 0.5% by weight of a nonionic surfactant to remove calcium carbonate, followed by 6 to 100-105 ° C. at a strain rate of 1250% / min.
- the film was obtained by stretching 2 times. Further, heat setting was performed at 126 ° C. to obtain the first layer 132. This first layer 132 was used as the separator 130.
- Example 2 A pair of rolling rolls having 70% by weight of GUR4032 made by Ticona as ultra high molecular weight polyethylene powder, 30% by weight of polyethylene wax, 36% by volume of calcium carbonate, and a surface temperature of 150 ° C. The sheet was cooled in stages while being pulled with a roll having a different speed ratio (draw ratio (winding roll speed / rolling roll speed) 1.4 times), and a sheet having a film thickness of about 41 ⁇ m was created. A separator 130 was obtained by the same method as in Example 1 except that the fixing process was performed at 120 ° C.
- Example 3 Three rolling rolls R1 having 71.5% by weight of ultrahigh molecular weight polyethylene powder, 28.5% by weight of polyethylene wax, 37% by volume of calcium carbonate, and a surface temperature of 150 ° C. , R2 and R3 were used to create a sheet having a film thickness of about 70 ⁇ m, the polyolefin resin composition was stretched 7.0 times at a strain rate of 2100% / min, and heat setting was performed at 123 ° C. A separator 130 was obtained in the same manner as in Example 2 except for the above.
- Ultra high molecular weight polyethylene powder (GUR4032, manufactured by Ticona) is 70% by weight, polyethylene wax having a weight average molecular weight of 1000 (FNP-0115, manufactured by Nippon Seiki Co., Ltd.), 30% by weight, and the total of the ultra high molecular weight polyethylene and polyethylene wax is As 100 parts by weight, antioxidant (Irg1010, manufactured by Ciba Specialty Chemicals) 0.4% by weight, (P168, manufactured by Ciba Specialty Chemicals) 0.1% by weight, sodium stearate 1.3% by weight In addition, calcium carbonate having an average pore diameter of 0.1 ⁇ m (manufactured by Maruo Calcium Co., Ltd.) was added as a pore-forming agent so as to be 36% by volume with respect to the total volume.
- antioxidant Irg1010, manufactured by Ciba Specialty Chemicals
- P168 manufactured by Ciba Specialty Chemicals
- the polyolefin resin composition was obtained by melt-kneading with a shaft kneader.
- the obtained polyolefin resin composition was rolled using a pair of rolling rolls having a surface temperature of 150 ° C., and cooled stepwise while being pulled by a winding roll with a different speed ratio (draw ratio (winding roll speed / A sheet having a rolling roll speed of 1.4 times) and a film thickness of about 29 ⁇ m was prepared.
- This sheet was immersed in hydrochloric acid (4 mol / L) containing 0.5% by weight of a nonionic surfactant to remove calcium carbonate, followed by 6 to 100-105 ° C. at a strain rate of 750% / min.
- the film was stretched 2 times to obtain a film having a thickness of 16.3 ⁇ m. Furthermore, this film was heat-set at 115 ° C. to obtain a separator.
- Comparative Example 2 A commercially available polyolefin porous film (polyolefin separator) was used as the separator of the comparative example.
- Positive electrode> A commercially available positive electrode manufactured by applying a laminate of LiNi 0.5 Mn 0.3 Co 0.2 O 2 / conductive material / PVDF (weight ratio 92/5/3) to an aluminum foil was processed.
- LiNi 0.5 Mn 0.3 Co 0.2 O 2 is an active material layer.
- the aluminum foil is cut out so that the size of the positive electrode active material layer is 45 mm ⁇ 30 mm and the outer periphery thereof has a width of 13 mm and no positive electrode active material layer is formed. Used as a positive electrode in the process.
- the thickness of the positive electrode active material layer was 58 ⁇ m, the density was 2.50 g / cm 3 , and the positive electrode capacity was 174 mAh / g.
- Negative electrode> A commercial negative electrode manufactured by applying graphite / styrene-1,3-butadiene copolymer / sodium carboxymethylcellulose (weight ratio 98/1/1) to a copper foil was processed.
- graphite functions as a negative electrode active material layer.
- the copper foil is cut out so that the size of the negative electrode active material layer is 50 mm ⁇ 35 mm, the width is 13 mm, and the negative electrode active material layer is not formed, and the assembly described below is performed. Used as a negative electrode in the process.
- the thickness of the negative electrode active material layer was 49 ⁇ m, the density was 1.40 g / cm 3 , and the negative electrode capacity was 372 mAh / g.
- the positive electrode, the separator, and the negative electrode were laminated in this order to obtain a laminate.
- the positive electrode and the negative electrode were arranged so that the entire upper surface of the positive electrode active material layer overlapped with the main surface of the negative electrode active material layer.
- the laminated body was arrange
- electrolytic solution a mixed solution in which LiPF 6 having a concentration of 1.0 mol / L was dissolved in a mixed solvent having a volume ratio of ethyl methyl carbonate, diethyl carbonate, and ethylene carbonate of 50:20:30 was used.
- the secondary battery was produced by heat-sealing a housing
- the design capacity of the secondary battery was 20.5 mAh.
- the film thickness D was measured using a high-precision digital length measuring machine manufactured by Mitutoyo Corporation.
- the specific gravity is the specific gravity of the ultra high molecular weight polyethylene powder.
- microwave irradiation was performed at 1800 W for 2 minutes.
- the temperature change of the separator after the start of microwave irradiation was measured every 0.2 seconds with the optical fiber thermometer.
- the temperature when no temperature increase was observed for 1 second or more was defined as the temperature rising convergence temperature
- the time from the start of microwave irradiation until the temperature rising convergence temperature was reached was defined as the convergence time.
- the temperature rise convergence time was calculated by dividing the obtained convergence time by the separator basis weight.
- FIG. 2A is a top view of the frame 200 on which the separator 130 is placed.
- FIGS. 2B and 2C show a state in which the separator 130 and the SUS plate 204 are installed on the frame 200, respectively. They are a top view and a side view.
- the frame 200 has a 47 mm ⁇ 35 mm hole 202 and has a rectangular shape of 85 mm ⁇ 65 mm.
- a separator 130 cut to a size of 85 mm ⁇ 65 mm was placed on the frame 200 (FIG. 2C). At this time, the separator 130 was placed so that the MD of the separator 130 was parallel to the long side of the hole 202.
- an SUS plate 204 having the same shape as the frame 200 is placed on the separator 130, and the frame 200 and the SUS are placed near the center of each side.
- the plate 204 was fixed with a clamp (non-twist clamp) 206.
- the separator 130 is sandwiched between the frame 200 and the SUS plate 204.
- the height of the sphere to be freely dropped in the first falling ball test that is, the distance between the separator 130 and the sphere immediately before the sphere was freely dropped was h1.
- the height h2 of the ball in the second falling ball test is set to (h1-5 cm), and when the separator 130 is not broken, the second time
- the height h2 of the sphere in the falling ball test was set to (h1 + 5 cm). In this way, the falling ball test was repeated while changing the height of the sphere.
- the separator 130 when the separator 130 is confirmed to be broken as a result of evaluation at the distance hk between the separator 130 and the sphere in the k-th (k is an integer equal to or greater than 1) falling ball test, the height of the sphere in the (k + 1) th falling ball test.
- the height hk + 1 of the sphere in the (k + 1) th falling ball test was set to (hk + 5 cm). Repeat the falling ball test until the number of falling ball tests with confirmed destruction and the number of falling ball tests with no confirmed destruction reached 5 or more. Was the minimum height.
- Cutting workability> 3A and 3B show a method for evaluating cutting workability.
- one side of the long side of the separator 130 cut into MD 10 cm and TD 5 cm was fixed with a tape 210.
- the cutter knife 212 is moved in parallel with TD at a speed of about 8 cm / s while being held at an angle of 80 ° with respect to the horizontal direction, and the separator 130 is cut by 3 cm, The cutting state was confirmed (see dotted arrow in the figure). Evaluation was made with a case where tearing in the unintended direction (MD) was confirmed at the cut site as-, and a case where tearing was not confirmed as +.
- MD unintended direction
- a product number A300 manufactured by NT Cutter was used, and as a cutter table, a product number Mar 44N manufactured by KOKUYO was used.
- the blade was exchanged for each test, and a product number BA-160 manufactured by NT Cutter was used as a replacement blade.
- the separator 130 was cut into a strip of TD 62 mm ⁇ MD 30 cm, and with one end of the MD attached with a 300 g weight, the other end was wound around a stainless ruler (Shinwa Co., Ltd., product number 13131) five times. .
- the stainless ruler has a bending knob at one end in the longitudinal direction, and the separator 130 is wound so that the TD of the separator and the longitudinal direction of the stainless ruler are parallel to each other. Thereafter, the stainless ruler was pulled out to the side where the bending knob was formed at a speed of about 8 cm / s, and the sensitivity (extraction sensitivity) of the ease of removal was evaluated.
- “+” indicates a case where the resistance is smoothly pulled out without feeling resistance
- “ ⁇ ” indicates a case where a slight resistance is felt
- “ ⁇ ” indicates a case where the resistance is felt and it is difficult to pull out.
- the width of TD of the separator 130 at the portion wound five times before and after the stainless ruler was pulled out was measured with a caliper, and the amount of change (mm) was calculated.
- This amount of change is the amount of elongation in the pulling direction when the separator starts to move in the pulling direction of the stainless ruler due to the friction between the stainless ruler and the separator 130 and the separator is deformed in a spiral shape.
- FIGS. 4A and 4B are diagrams showing a sled member 220 for measuring pin pull-out resistance, showing the magnitude of friction between the surface of the separator 130 and other members.
- FIGS. 4A and 4B are a bottom view and a side view of the sled member, respectively.
- the sled member 220 has two protrusions 222 having a tip of 3 mm in curvature on the bottom surface.
- the protrusions 222 are arranged so as to be parallel to each other with an interval of 28 mm.
- the separator 130 was cut into TD 6 cm and MD 5 cm, and the separator 130 was attached to the ridge 222 with tape so that the TD of the separator 130 and the direction of the ridge 222 coincided.
- the sled member 220 having the separator 130 attached to the lower surface was placed on a plate (silverstone (registered trademark) processed plate) 224 processed with a fluororesin.
- a weight 226 was installed on the sled member 220.
- the total weight of the weight 226 and the sled member 220 was 1800 g.
- the separator 130 was disposed between the sled member 220 and the plate 224.
- Silverstone processing was carried out by Hakusui Sangyo Co., Ltd. on a plate of high-speed tool steel SKH51.
- the thickness of the processed silver stone was 20 to 30 ⁇ m, and the surface roughness Ra measured with a handy surf was 0.8 ⁇ m.
- the secondary battery 100 manufactured by the above-described method was subjected to initial charge and discharge for 4 cycles at 25 ° C. with a voltage range of 4.1 V to 2.7 V and a current value of 0.2 C as one cycle.
- the secondary battery 100 that was initially charged / discharged was charged / discharged at 55 ° C. with a constant current of a charge current value of 1 C and discharge current values of 0.2 C and 20 C for 3 cycles each. Thereafter, the secondary battery 100 was charged and discharged for 100 cycles at 55 ° C., with a constant current having a voltage range of 4.2 V to 2.7 V, a charging current value of 1 C, and a discharging current value of 10 C as one cycle. Thereafter, charging and discharging were performed for 3 cycles each at a constant current of 55C and a charging current value of 1C and discharging current values of 0.2C and 10C.
- the discharge current value is 0.2 C and 10 C
- the ratio of the discharge capacity at the third cycle (10 C discharge capacity / 0.2 C discharge capacity) is defined as the battery characteristics after 100 cycles of charge and discharge (battery characteristics after 100 cycles). Calculated.
- Table 1 summarizes the separators of Examples 1 to 3 and Comparative Examples 1 and 2 and the characteristics of the secondary batteries produced using these separators.
- the temperature rise convergence time is 2.9 s ⁇ m 2 / g or more and 5.7 s ⁇ m 2 / g or less, and the minimum height of the falling ball test is 50 cm or more and 150 cm or less. It was confirmed that there was.
- the separator of Comparative Example 1 has a temperature rise convergence time of 2.9 s ⁇ m 2 / g or more and 5.7 s ⁇ m 2 / g or less, but the minimum height remains as low as 35 cm.
- it is considered that the ratio of the skin layer is smaller than that of Comparative Example 1 because the thickness of the first layer 132 during rolling is large.
- the rate characteristics after 100 cycles are high. That is, it was found that by using the separator 130 of Examples 1 to 3, a secondary battery in which deterioration of battery characteristics due to repeated charge and discharge was suppressed was provided. In contrast, although the temperature rise convergence time is 2.9 s ⁇ m 2 / g or more and 5.7 s ⁇ m 2 / g or less, the minimum height is 35 cm and the separator 130 of Comparative Example 1 is used. When it was, it turned out that a battery characteristic maintenance factor is low.
- the separator 130 of Comparative Example 2 that does not satisfy the range of the temperature rise convergence time of 2.9 s ⁇ m 2 / g to 5.7 s ⁇ m 2 / g and that has a minimum height of less than 35 cm was used.
- Battery characteristics maintainability is an index that indicates the resistance of a secondary battery to discharge with a large current, and the discharge capacity when a secondary battery is discharged with a large current relative to the discharge capacity when the secondary battery is discharged with a small current. Expressed as a percentage of capacity. It can be said that the higher the battery property maintenance ratio, the better the battery property maintenance property and the better the battery output property.
- 100 secondary battery, 110: positive electrode, 112: positive electrode current collector, 114: positive electrode active material layer, 120: negative electrode, 122: negative electrode current collector, 124: negative electrode active material layer, 130: separator, 132: first , 134: porous layer, 140: electrolyte, 200: frame, 202: hole, 204: plate, 206: clamp, 210: tape, 212: cutter knife, 220: sled member, 222: protrusion, 224 : Board, 228: Pulley
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Secondary Cells (AREA)
- Cell Separators (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Laminated Bodies (AREA)
Abstract
Description
本発明の実施形態の一つである二次電池100の断面模式図を図1(A)に示す。二次電池100は、正極110、負極120、正極110と負極120を分離するセパレータ130を有する。図示していないが、二次電池100は電解液140を有する。電解液140は主に正極110、負極120、セパレータ130の空隙や各部材間の隙間に存在する。正極110は正極集電体112と正極活物質層114を含むことができる。同様に、負極120は負極集電体122と負極活物質層124を含むことができる。図1(A)では図示していないが、二次電池100はさらに筐体を有し、筐体によって正極110、負極120、セパレータ130、および電解液140が保持される。
<1-1.構成>
セパレータ130は、正極110と負極120の間に設けられ、正極110と負極120を分離するとともに、二次電池100内で電解液140の移動を担うフィルムである。図1(B)にセパレータ130の断面模式図を示す。セパレータ130は多孔質ポリオレフィンを含む第1の層132を有し、さらに任意の構成として、多孔質層134を有することができる。セパレータ130は、図1(B)に示すように、2つの多孔質層134が第1の層132を挟持する構造を有することもできるが、第1の層132の一方の面のみに多孔質層134を設けてもよく、あるいは多孔質層134を設けない構成とすることもできる。第1の層132は単層の構造を有していてもよく、複数の層から構成されていてもよい。
第1の層132は、3重量%の水を含むN-メチルピロリドンに含浸させた後、周波数2455MHzのマイクロ波を出力1800Wで照射したときの昇温が収束するまでの目付当たりの時間(以下、温度上昇収束時間と記す)が、2.9s・m2/g以上5.7s・m2/g以下、あるいは2.9s・m2/g以上5.3s・m2/g以下である。また、第1の層132は、落球試験における球の最低高さが50cm以上150cm以下である。実施例に記したように発明者らは、このような特性を満たす第1の層132を含むセパレータ130を用いることで、充放電を繰り返したときの電池特性の低下が抑制された二次電池を歩留まり良く製造できることを見出した。
上述したように、正極110は正極集電体112と正極活物質層114を含むことができる。同様に、負極120は負極集電体122と負極活物質層124を含むことができる(図1(A)参照)。正極集電体112、負極集電体122はそれぞれ、正極活物質層114、負極活物質層124を保持し、電流を正極活物質層114、負極活物質層124へ供給する機能を有する。
電解液140は溶媒と電解質を含み、電解質のうち少なくとも一部は溶媒に溶解し、電離している。溶媒としては水や有機溶媒を用いることができる。二次電池100を非水電解液二次電池として用いる場合には、有機溶媒が用いられる。有機溶媒としては、エチレンカーボネート、プロピレンカーボネート、ジメチルカーボネート、ジエチルカーボネート、エチルメチルカーボネート、1,2-ジ(メトキシカルボニルオキシ)エタンなどのカーボネート類;1,2-ジメトキシエタン、1,3-ジメトキシプロパン、テトラヒドロフラン、2-メチルテトラヒドロフランなどのエーテル類;ギ酸メチル、酢酸メチル、γ-ブチロラクトンなどのエステル類;アセトニトリル、ブチロニトリルなどのニトリル類;N,N-ジメチルホルムアミド、N,N-ジメチルアセトアミドなどのアミド類;3-メチル-2-オキサゾリドンなどのカルバメート類;スルホラン、ジメチルスルホキシド、1,3-プロパンサルトンなどの含硫黄化合物;および上記有機溶媒にフッ素が導入された含フッ素有機溶媒などが挙げられる。これらの有機溶媒の混合溶媒を用いてもよい。
図1(A)に示すように、負極120、セパレータ130、正極110を配置し、積層体を形成する。その後図示しない筐体へ積層体を設置し、筐体内を電解液で満たし、減圧しつつ筐体を密閉することにより、または筐体内を減圧しつつ共体内を電解液で満たしたのちに密閉することにより、二次電池100を作製することができる。二次電池100の形状は特に限定されず、薄板(ペーパー)型、円盤型、円筒型、直方体などの角柱型などであってもよい。
本実施形態では、第1実施形態で述べた第1の層132の作成方法について述べる。第1実施形態と同様の構成に関しては説明を割愛することがある。
本実施形態では、セパレータ130が第1の層132とともに多孔質層134を有する態様を説明する。
第1実施形態で述べたように、多孔質層134は、第1の層132の片面、または両面に設けることができる(図1(B)参照)。第1の層132の片面に多孔質層134が積層される場合には、多孔質層134は、第1の層132の正極110側に設けてもよく、負極120側に設けてもよい。
フィラーを含む多孔質層134を形成する場合、上述した高分子や樹脂を溶媒中に溶解、あるいは分散させたのち、この混合液にフィラーを分散させて分散液(以下、塗工液と記す)を作成する。溶媒としては、水;メチルアルコール、エチルアルコール、n-プロピルアルコール、イソプロピルアルコール、t-ブチルアルコールなどのアルコール;アセトン、トルエン、キシレン、ヘキサン、N-メチルピロリドン、N,N-ジメチルアセトアミド、N,N-ジメチルホルムアミドなどが挙げられる。1種類の溶媒のみを用いてもよく、2種類以上の溶媒を用いてもよい。
セパレータ130の作成例を以下に述べる。実施例1から3では、作成した第1の層132をセパレータ130として用いた。
超高分子量ポリエチレン粉末(GUR2024、ティコナ社製)を68重量%、重量平均分子量1000のポリエチレンワックス(FNP-0115、日本精鑞社製)32重量%、この超高分子量ポリエチレンとポリエチレンワックスの合計を100重量部として、酸化防止剤(Irg1010、チバ・スペシャリティ・ケミカルズ社製)0.4重量%、(P168、チバ・スペシャリティ・ケミカルズ社製)0.1重量%、ステアリン酸ナトリウム1.3重量%を加え、さらに全体積に対して38体積%となるように平均孔径0.1μmの炭酸カルシウム(丸尾カルシウム社製)を孔形成剤として加え、これらを粉末のままヘンシェルミキサーで混合した後、二軸混練機で溶融混練してポリオレフィン樹脂組成物を得た。得られたポリオレフィン樹脂組成物を表面温度が150℃の3本の圧延ロールR1、R2、R3を用い、R1、R2で1回目の圧延、R2、R3で2回目の圧延を行い、速度比を変えた巻取りロールで引張りながら段階的に冷却し(ドロー比(巻取りロール速度/圧延ロール速度)1.4倍)、膜厚約64μmのシートを作成した。このシートを非イオン系界面活性剤0.5重量%を含む塩酸(4mol/L)に浸漬させることで炭酸カルシウムを除去し、続いて100~105℃、歪速度1250%/分の速度で6.2倍に延伸してフィルムを得た。さらに126℃で熱固定処理を行い、第1の層132を得た。この第1の層132をセパレータ130として用いた。
超高分子量ポリエチレン粉末としてティコナ社製GUR4032を70重量%用いた点、ポリエチレンワックスを30重量%用いた点、炭酸カルシウムを36体積%で用いた点、表面温度が150℃の一対の圧延ロールを用いて圧延し、速度比を変えたロールで引張りながら段階的に冷却し(ドロー比(巻取りロール速度/圧延ロール速度)1.4倍)、膜厚約41μmのシートを作成した点、熱固定処理を120℃で行った点を除き、実施例1と同様の手法によりセパレータ130を得た
超高分子量ポリエチレン粉末を71.5重量%用いた点、ポリエチレンワックスを28.5重量%用いた点、炭酸カルシウムを37体積%で用いた点、表面温度が150℃の3本の圧延ロールR1、R2、R3を用いて膜厚約70μmのシートを作成した点、歪速度2100%/分の速度でポリオレフィン樹脂組成物を7.0倍に延伸した点、熱固定処理を123℃で行った点を除き、実施例2と同様の手法によりセパレータ130を得た。
超高分子量ポリエチレン粉末(GUR4032、ティコナ社製)を70重量%、重量平均分子量1000のポリエチレンワックス(FNP-0115、日本精鑞社製)30重量%、この超高分子量ポリエチレンとポリエチレンワックスの合計を100重量部として、酸化防止剤(Irg1010、チバ・スペシャリティ・ケミカルズ社製)0.4重量%、(P168、チバ・スペシャリティ・ケミカルズ社製)0.1重量%、ステアリン酸ナトリウム1.3重量%を加え、さらに全体積に対して36体積%となるように平均孔径0.1μmの炭酸カルシウム(丸尾カルシウム社製)を孔形成剤として加え、これらを粉末のままヘンシェルミキサーで混合した後、二軸混練機で溶融混練してポリオレフィン樹脂組成物を得た。得られたポリオレフィン樹脂組成物を表面温度が150℃の一対の圧延ロールを用いて圧延を行い、速度比を変えた巻取りロールで引張りながら段階的に冷却し(ドロー比(巻取りロール速度/圧延ロール速度)1.4倍)、膜厚約29μmのシートを作成した。このシートを非イオン系界面活性剤0.5重量%を含む塩酸(4mol/L)に浸漬させることで炭酸カルシウムを除去し、続いて100~105℃、歪速度750%/分の速度で6.2倍に延伸し、膜厚16.3μmのフィルムを得た。さらにこのフィルムを115℃で熱固定を行い、セパレータを得た。
比較例のセパレータとして、市販品のポリオレフィン多孔質フィルム(ポリオレフィンセパレータ)を用いた。
実施例1から3、および比較例1、2のセパレータを含む二次電池の作製方法を以下に記す。
LiNi0.5Mn0.3Co0.2O2/導電材/PVDF(重量比92/5/3)の積層をアルミニウム箔に塗布することにより製造された市販の正極を加工した。ここで、LiNi0.5Mn0.3Co0.2O2は活物質層である。具体的には、正極活物質層の大きさが45mm×30mmであり、かつその外周に幅13mmで正極活物質層が形成されていない部分が残るように、アルミニウム箔を切り取り、以下に述べる組立工程において正極として用いた。正極活物質層の厚さは58μm、密度は2.50g/cm3、正極容量は174mAh/gであった。
黒鉛/スチレン-1,3-ブタジエン共重合体/カルボキシメチルセルロースナトリウム(重量比98/1/1)を銅箔に塗布することにより製造された市販の負極を加工した。ここで、黒鉛が負極活物質層として機能する。具体的には、負極活物質層の大きさが50mm×35mmであり、かつその外周に幅13mmで負極活物質層が形成されていない部分が残るように、銅箔を切り取り、以下に述べる組立工程において負極として用いた。負極活物質層の厚さは49μm、の密度は1.40g/cm3、負極容量は372mAh/gであった。
ラミネートパウチ内で、正極、セパレータ、および負極をこの順で積層し、積層体を得た。この時、正極活物質層の上面の全てが負極活物質層の主面と重なるように、正極および負極を配置した。
実施例1から3、および比較例1、2のセパレータの各種物性、およびこれらのセパレータを含む二次電池の特性の評価結果を以下に述べる。
膜厚Dは、株式会社ミツトヨ製の高精度デジタル測長機を用いて測定した。
第1の層132を一辺の長さ10cmの正方形に切り取り、重量W(g)を測定した。以下の式に従い、膜厚D(μm)と重量W(g)から空隙率(体積%)を算出した。
空隙率(体積%)=(1-(W/比重)/(10×10×D/10000))×100
ここで、比重は超高分子量ポリエチレン粉末の比重である。
8cm×8cmの大きさのセパレータを3wt%の水を添加したN-メチルピロリドンに含浸させた後、テフロン(登録商標)シート(サイズ:12cm×10cm)の上に広げ、ポリテトラフルオロエチレンで被覆された光ファイバー式温度計(アステック株式会社製、Neoptix Reflex 温度計)を挟むように半分に折り曲げた。
図2(A)から図2(C)に落球試験で用いる治具を示す。図2(A)は、セパレータ130が載置される枠200の上面図であり、図2(B)と図2(C)はそれぞれ、枠200上にセパレータ130とSUSプレート204を設置した状態の上面図と側面図である。枠200は47mm×35mmの穴202を有し、85mm×65mmの矩形状である。枠200の上に85mm×65mmのサイズに切り取られたセパレータ130を載置した(図2(C))。このとき、セパレータ130のMDが穴202の長辺と平行になるようにセパレータ130を載置した。次に、図2(B)、図2(C)に示されるように、枠200と同形状のSUSプレート204をセパレータ130の上に載置し、各辺の中央付近において、枠200とSUSプレート204とをクランプ(ノンツイストクランプ)206で固定した。図2(C)に示されるように、セパレータ130が枠200とSUSプレート204とで挟持される。
対物レンズ:5倍(マイケルソン型)、中間レンズ:1倍、波長フィルター:530nm、CCDカメラ:1/3インチ、測定モード:Wave、データの補正:半径 7.15mmの球面近似。
図3(A)、図3(B)に切断加工性の評価方法を示す。図3(A)に示すように、MD10cm、TD5cmに切断したセパレータ130の長辺の一辺をテープ210で固定した。そして、図3(B)に示すように、カッターナイフ212を水平方向に対して80°の角度で保持した状態で約8cm/sの速度でTDに平行に動かし、セパレータ130を3cm切断し、切断状態を確認した(図中、点線矢印参照)。切断箇所において意図しない方向(MD)への裂けが確認されたものを-、裂けが確認されなかったものを+として評価を行った。カッターナイフ212はNTカッター製の品番A300を、カッター台はコクヨ製の品番マ-44Nを用いた。刃は試験ごとに交換し、替刃としてNTカッター製の品番BA-160を使用した。
セパレータ130をTD62mm×MD30cmの短冊状に切断し、MDの一方の端部に300gの重りを付けた状態で、他方の端部をステンレス定規(シンワ株式会社製 品番13131)に5回巻きつけた。ステンレス定規は長手方向の一端に曲げつまみを有しており、セパレータのTDとステンレス定規の長手方向とが平行となるようにセパレータ130を巻いた。その後、ステンレス定規を約8cm/sの速度で曲げつまみが形成されている側に引き抜き、抜けやすさの感度(抜け感度)を評価した。具体的には、抵抗を感じることなくスムーズに引き抜けた場合を+、わずかな抵抗を感じた場合を±、抵抗があり、引き抜きにくい感覚があった場合を-とした。
図4(A)、図4(B)は、セパレータ130の表面と他の部材との摩擦の大きさを示す、ピン抜け抵抗を測定するためのそり部材220を示す図である。図4(A)、図4(B)はそれぞれ、そり部材の底面図、側面図である。図4(A)に示すように、そり部材220は、先端が曲率3mmの2つの突条222を底面に有している。突条222は、28mmの間隔を空けて互いに平行になるように配置されている。
ピン抜け抵抗=F×1000/(9.80665/1800)
上述した方法で作製された二次電池100を、25℃で電圧範囲4.1Vから2.7V、電流値0.2Cを1サイクルとして、4サイクルの初期充放電を行った。
Claims (7)
- 多孔質ポリオレフィンからなる第1の層を有し、
3重量%の水を含むN-メチルピロリドンに前記第1の層を含浸させた後、周波数2455MHzのマイクロ波を出力1800Wで前記第1の層に照射したときの前記第1の層の温度上昇収束時間が2.9s・m2/g以上5.7s・m2/g以下であり、
前記第1の層上に設置した直径14.3mm、重さ11.9gの球を前記第1の層に対して自由落下させた場合に、前記第1の層が裂ける球の最低高さが50cm以上150cm以下であるセパレータ。 - 前記セパレータの厚さが4μm以上20μm以下である、請求項1に記載のセパレータ。
- 前記セパレータの空隙率が20%以上55%以下である、請求項1に記載のセパレータ。
- 前記温度上昇収束時間が2.9s・m2/g以上5.3s・m2/g以下である、請求項1に記載のセパレータ。
- 前記第1の層上に多孔質層をさらに含む、請求項1に記載のセパレータ。
- 前記第1の層を挟持する一対の多孔質層をさらに含む、請求項1に記載のセパレータ。
- 請求項1に記載の前記セパレータを有する二次電池。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020197013298A KR102073226B1 (ko) | 2016-10-24 | 2016-10-24 | 세퍼레이터 및 세퍼레이터를 포함하는 이차 전지 |
PCT/JP2016/081481 WO2018078704A1 (ja) | 2016-10-24 | 2016-10-24 | セパレータ、およびセパレータを含む二次電池 |
US16/344,149 US10661528B2 (en) | 2016-10-24 | 2016-10-24 | Separator and secondary battery including the separator |
JP2018546955A JP6580798B2 (ja) | 2016-10-24 | 2016-10-24 | セパレータ、およびセパレータを含む二次電池 |
CN201680090383.3A CN109891631B (zh) | 2016-10-24 | 2016-10-24 | 间隔件和包含间隔件的二次电池 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2016/081481 WO2018078704A1 (ja) | 2016-10-24 | 2016-10-24 | セパレータ、およびセパレータを含む二次電池 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018078704A1 true WO2018078704A1 (ja) | 2018-05-03 |
Family
ID=62024150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2016/081481 WO2018078704A1 (ja) | 2016-10-24 | 2016-10-24 | セパレータ、およびセパレータを含む二次電池 |
Country Status (5)
Country | Link |
---|---|
US (1) | US10661528B2 (ja) |
JP (1) | JP6580798B2 (ja) |
KR (1) | KR102073226B1 (ja) |
CN (1) | CN109891631B (ja) |
WO (1) | WO2018078704A1 (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11094997B2 (en) | 2017-05-29 | 2021-08-17 | Sumitomo Chemical Company, Limited | Nonaqueous electrolyte secondary battery |
JP6430618B1 (ja) | 2017-12-19 | 2018-11-28 | 住友化学株式会社 | 非水電解液二次電池 |
US11205799B2 (en) * | 2017-12-19 | 2021-12-21 | Sumitomo Chemical Company, Limited | Nonaqueous electrolyte secondary battery |
JP6507220B1 (ja) * | 2017-12-19 | 2019-04-24 | 住友化学株式会社 | 非水電解液二次電池 |
JP6430617B1 (ja) | 2017-12-19 | 2018-11-28 | 住友化学株式会社 | 非水電解液二次電池 |
US11158907B2 (en) | 2017-12-19 | 2021-10-26 | Sumitomo Chemical Company, Limited | Nonaqueous electrolyte secondary battery |
JP6430623B1 (ja) | 2017-12-19 | 2018-11-28 | 住友化学株式会社 | 非水電解液二次電池 |
JP6430621B1 (ja) | 2017-12-19 | 2018-11-28 | 住友化学株式会社 | 非水電解液二次電池 |
JP7298246B2 (ja) * | 2019-03-29 | 2023-06-27 | Ube株式会社 | ポリオレフィン多孔質フィルム、蓄電デバイス用セパレータ、および蓄電デバイス |
KR102348955B1 (ko) * | 2020-06-26 | 2022-01-11 | 재단법인대구경북과학기술원 | 함침상태 복합전극의 결착력 측정 방법 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012090632A1 (ja) * | 2010-12-28 | 2012-07-05 | 旭化成イーマテリアルズ株式会社 | ポリオレフィン系多孔質膜及びその製造方法 |
JP2012227066A (ja) * | 2011-04-21 | 2012-11-15 | Sony Corp | セパレータおよび非水電解質電池、ならびに電池パック、電子機器、電動車両、蓄電装置および電力システム |
JP2015120835A (ja) * | 2013-12-24 | 2015-07-02 | 東レバッテリーセパレータフィルム株式会社 | ポリオレフィン微多孔膜、二次電池用セパレータおよび二次電池 |
JP6012838B1 (ja) * | 2015-11-30 | 2016-10-25 | 住友化学株式会社 | 非水電解液二次電池用セパレータの製造方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO136831C (no) | 1974-10-28 | 1977-11-16 | Stroemmen Staal A S | Rordreieanordning med hydraulisk vingemotor. |
JP6324655B2 (ja) * | 2012-06-20 | 2018-05-16 | 住友化学株式会社 | セパレータの製造方法及び非水電解液二次電池 |
JP6053904B1 (ja) * | 2015-11-30 | 2016-12-27 | 住友化学株式会社 | 非水電解液二次電池用セパレータ、非水電解液二次電池用積層セパレータ、非水電解液二次電池用部材および非水電解液二次電池 |
-
2016
- 2016-10-24 WO PCT/JP2016/081481 patent/WO2018078704A1/ja active Application Filing
- 2016-10-24 US US16/344,149 patent/US10661528B2/en active Active
- 2016-10-24 CN CN201680090383.3A patent/CN109891631B/zh active Active
- 2016-10-24 KR KR1020197013298A patent/KR102073226B1/ko active IP Right Grant
- 2016-10-24 JP JP2018546955A patent/JP6580798B2/ja active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012090632A1 (ja) * | 2010-12-28 | 2012-07-05 | 旭化成イーマテリアルズ株式会社 | ポリオレフィン系多孔質膜及びその製造方法 |
JP2012227066A (ja) * | 2011-04-21 | 2012-11-15 | Sony Corp | セパレータおよび非水電解質電池、ならびに電池パック、電子機器、電動車両、蓄電装置および電力システム |
JP2015120835A (ja) * | 2013-12-24 | 2015-07-02 | 東レバッテリーセパレータフィルム株式会社 | ポリオレフィン微多孔膜、二次電池用セパレータおよび二次電池 |
JP6012838B1 (ja) * | 2015-11-30 | 2016-10-25 | 住友化学株式会社 | 非水電解液二次電池用セパレータの製造方法 |
Also Published As
Publication number | Publication date |
---|---|
KR102073226B1 (ko) | 2020-02-05 |
CN109891631B (zh) | 2020-03-10 |
US20200070470A1 (en) | 2020-03-05 |
KR20190070339A (ko) | 2019-06-20 |
US10661528B2 (en) | 2020-05-26 |
JP6580798B2 (ja) | 2019-09-25 |
JPWO2018078704A1 (ja) | 2019-06-27 |
CN109891631A (zh) | 2019-06-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6580798B2 (ja) | セパレータ、およびセパレータを含む二次電池 | |
JP6012838B1 (ja) | 非水電解液二次電池用セパレータの製造方法 | |
KR101745283B1 (ko) | 비수 전해액 이차 전지용 세퍼레이터, 비수 전해액 이차 전지용 적층 세퍼레이터, 비수 전해액 이차 전지용 부재 및 비수 전해액 이차 전지 | |
JP2017103204A (ja) | 非水電解液二次電池用セパレータ、非水電解液二次電池用積層セパレータ、非水電解液二次電池用部材および非水電解液二次電池 | |
JP6605753B2 (ja) | セパレータ、およびセパレータを含む二次電池 | |
JP6595725B2 (ja) | セパレータ、およびセパレータを含む二次電池 | |
JP6647418B2 (ja) | セパレータ、およびセパレータを含む二次電池 | |
WO2018078710A1 (ja) | セパレータ、およびセパレータを含む二次電池 | |
JP6588170B2 (ja) | セパレータ、およびセパレータを含む二次電池 | |
JP6588171B2 (ja) | セパレータ、およびセパレータを含む二次電池 | |
JP6569013B2 (ja) | セパレータ、およびセパレータを含む二次電池 | |
JP6634364B2 (ja) | 非水電解液二次電池用セパレータ、非水電解液二次電池用積層セパレータ、非水電解液二次電池用部材および非水電解液二次電池 | |
JP2017103199A (ja) | 非水電解液二次電池用セパレータ、非水電解液二次電池用積層セパレータ、非水電解液二次電池用部材および非水電解液二次電池 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16920225 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2018546955 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20197013298 Country of ref document: KR Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 16920225 Country of ref document: EP Kind code of ref document: A1 |