WO2023245639A1 - 快充型负极活性材料及其制备方法、负极极片、二次电池及用电装置 - Google Patents
快充型负极活性材料及其制备方法、负极极片、二次电池及用电装置 Download PDFInfo
- Publication number
- WO2023245639A1 WO2023245639A1 PCT/CN2022/101194 CN2022101194W WO2023245639A1 WO 2023245639 A1 WO2023245639 A1 WO 2023245639A1 CN 2022101194 W CN2022101194 W CN 2022101194W WO 2023245639 A1 WO2023245639 A1 WO 2023245639A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carbon
- active material
- fast
- negative active
- negative electrode
- Prior art date
Links
- 239000007773 negative electrode material Substances 0.000 title claims abstract description 150
- 238000002360 preparation method Methods 0.000 title abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 181
- 239000000463 material Substances 0.000 claims abstract description 115
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 110
- 239000011247 coating layer Substances 0.000 claims abstract description 58
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 110
- 238000000034 method Methods 0.000 claims description 90
- 239000010410 layer Substances 0.000 claims description 67
- 229910002804 graphite Inorganic materials 0.000 claims description 41
- 239000010439 graphite Substances 0.000 claims description 41
- 238000005087 graphitization Methods 0.000 claims description 41
- 229910052799 carbon Inorganic materials 0.000 claims description 30
- 238000005253 cladding Methods 0.000 claims description 22
- 238000003763 carbonization Methods 0.000 claims description 18
- 238000005245 sintering Methods 0.000 claims description 17
- 238000005056 compaction Methods 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 15
- 239000011163 secondary particle Substances 0.000 claims description 15
- 229910003481 amorphous carbon Inorganic materials 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 229910021385 hard carbon Inorganic materials 0.000 claims description 8
- 239000011164 primary particle Substances 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052721 tungsten Inorganic materials 0.000 claims description 6
- 239000002028 Biomass Substances 0.000 claims description 5
- 229910021384 soft carbon Inorganic materials 0.000 claims description 5
- 239000010937 tungsten Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- WSMQKESQZFQMFW-UHFFFAOYSA-N 5-methyl-pyrazole-3-carboxylic acid Chemical compound CC1=CC(C(O)=O)=NN1 WSMQKESQZFQMFW-UHFFFAOYSA-N 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 3
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 claims description 3
- 239000004005 microsphere Substances 0.000 claims description 3
- 239000011295 pitch Substances 0.000 claims description 3
- 239000002305 electric material Substances 0.000 claims 1
- 230000008569 process Effects 0.000 description 50
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 37
- 229910001416 lithium ion Inorganic materials 0.000 description 36
- 238000012360 testing method Methods 0.000 description 34
- 239000000571 coke Substances 0.000 description 32
- 229910021383 artificial graphite Inorganic materials 0.000 description 28
- 239000003792 electrolyte Substances 0.000 description 28
- -1 tungsten bronze compound Chemical class 0.000 description 23
- 229910052744 lithium Inorganic materials 0.000 description 21
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 20
- 238000004807 desolvation Methods 0.000 description 20
- 239000003208 petroleum Substances 0.000 description 18
- 230000009286 beneficial effect Effects 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 16
- 239000006258 conductive agent Substances 0.000 description 16
- 230000004888 barrier function Effects 0.000 description 15
- 239000011230 binding agent Substances 0.000 description 15
- 239000011267 electrode slurry Substances 0.000 description 15
- 238000002955 isolation Methods 0.000 description 15
- 238000004939 coking Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 13
- 239000007790 solid phase Substances 0.000 description 13
- 239000002994 raw material Substances 0.000 description 12
- 239000002904 solvent Substances 0.000 description 12
- 238000009792 diffusion process Methods 0.000 description 11
- 239000002131 composite material Substances 0.000 description 10
- 238000007493 shaping process Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 239000004698 Polyethylene Substances 0.000 description 8
- 239000004743 Polypropylene Substances 0.000 description 8
- 239000010426 asphalt Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 239000011888 foil Substances 0.000 description 8
- 239000011331 needle coke Substances 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- 229920000573 polyethylene Polymers 0.000 description 8
- 229920001155 polypropylene Polymers 0.000 description 8
- 239000011734 sodium Substances 0.000 description 8
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 7
- 239000002033 PVDF binder Substances 0.000 description 7
- 239000011300 coal pitch Substances 0.000 description 7
- 239000011883 electrode binding agent Substances 0.000 description 7
- 230000006872 improvement Effects 0.000 description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- 239000006229 carbon black Substances 0.000 description 6
- 239000006182 cathode active material Substances 0.000 description 6
- 238000005469 granulation Methods 0.000 description 6
- 230000003179 granulation Effects 0.000 description 6
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 230000014759 maintenance of location Effects 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 229920001707 polybutylene terephthalate Polymers 0.000 description 6
- 239000002861 polymer material Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 239000003245 coal Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000004806 packaging method and process Methods 0.000 description 5
- 239000003209 petroleum derivative Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 238000000498 ball milling Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 4
- 210000001787 dendrite Anatomy 0.000 description 4
- 239000008151 electrolyte solution Substances 0.000 description 4
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 4
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000007086 side reaction Methods 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 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 3
- 239000000654 additive Substances 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 238000005562 fading Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 230000037427 ion transport Effects 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 229910003002 lithium salt Inorganic materials 0.000 description 3
- 159000000002 lithium salts Chemical class 0.000 description 3
- 229910021437 lithium-transition metal oxide Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 235000021317 phosphate Nutrition 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 3
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002562 thickening agent Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 229910052726 zirconium Inorganic materials 0.000 description 3
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 description 2
- HNAGHMKIPMKKBB-UHFFFAOYSA-N 1-benzylpyrrolidine-3-carboxamide Chemical compound C1C(C(=O)N)CCN1CC1=CC=CC=C1 HNAGHMKIPMKKBB-UHFFFAOYSA-N 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- JGFBQFKZKSSODQ-UHFFFAOYSA-N Isothiocyanatocyclopropane Chemical compound S=C=NC1CC1 JGFBQFKZKSSODQ-UHFFFAOYSA-N 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical compound CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 2
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 2
- 239000006230 acetylene black Substances 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000006183 anode active material Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910000416 bismuth oxide Inorganic materials 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- OBNCKNCVKJNDBV-UHFFFAOYSA-N butanoic acid ethyl ester Natural products CCCC(=O)OCC OBNCKNCVKJNDBV-UHFFFAOYSA-N 0.000 description 2
- PWLNAUNEAKQYLH-UHFFFAOYSA-N butyric acid octyl ester Natural products CCCCCCCCOC(=O)CCC PWLNAUNEAKQYLH-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000002134 carbon nanofiber Substances 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 2
- VUPKGFBOKBGHFZ-UHFFFAOYSA-N dipropyl carbonate Chemical compound CCCOC(=O)OCCC VUPKGFBOKBGHFZ-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- QKBJDEGZZJWPJA-UHFFFAOYSA-N ethyl propyl carbonate Chemical compound [CH2]COC(=O)OCCC QKBJDEGZZJWPJA-UHFFFAOYSA-N 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 229910021389 graphene Inorganic materials 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 239000003273 ketjen black Substances 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
- DVATZODUVBMYHN-UHFFFAOYSA-K lithium;iron(2+);manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[Fe+2].[O-]P([O-])([O-])=O DVATZODUVBMYHN-UHFFFAOYSA-K 0.000 description 2
- ILXAVRFGLBYNEJ-UHFFFAOYSA-K lithium;manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[O-]P([O-])([O-])=O ILXAVRFGLBYNEJ-UHFFFAOYSA-K 0.000 description 2
- 229940017219 methyl propionate Drugs 0.000 description 2
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 description 2
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 2
- UUIQMZJEGPQKFD-UHFFFAOYSA-N n-butyric acid methyl ester Natural products CCCC(=O)OC UUIQMZJEGPQKFD-UHFFFAOYSA-N 0.000 description 2
- 229910021382 natural graphite Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000011301 petroleum pitch Substances 0.000 description 2
- 239000011310 petroleum-based needle coke Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 229920002961 polybutylene succinate Polymers 0.000 description 2
- 239000004631 polybutylene succinate Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000005036 potential barrier Methods 0.000 description 2
- 229940090181 propyl acetate Drugs 0.000 description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000661 sodium alginate Substances 0.000 description 2
- 235000010413 sodium alginate Nutrition 0.000 description 2
- 229940005550 sodium alginate Drugs 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 2
- HHVIBTZHLRERCL-UHFFFAOYSA-N sulfonyldimethane Chemical compound CS(C)(=O)=O HHVIBTZHLRERCL-UHFFFAOYSA-N 0.000 description 2
- 229920001897 terpolymer Polymers 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 239000011366 tin-based material Substances 0.000 description 2
- 238000009461 vacuum packaging Methods 0.000 description 2
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- MHWAJHABMBTNHS-UHFFFAOYSA-N 1,1-difluoroethene;1,1,2,2-tetrafluoroethene Chemical group FC(F)=C.FC(F)=C(F)F MHWAJHABMBTNHS-UHFFFAOYSA-N 0.000 description 1
- SKVZFDZSXCKKHQ-UHFFFAOYSA-N 1,1-difluoroethene;prop-1-ene Chemical group CC=C.FC(F)=C SKVZFDZSXCKKHQ-UHFFFAOYSA-N 0.000 description 1
- MBDUIEKYVPVZJH-UHFFFAOYSA-N 1-ethylsulfonylethane Chemical compound CCS(=O)(=O)CC MBDUIEKYVPVZJH-UHFFFAOYSA-N 0.000 description 1
- YBJCDTIWNDBNTM-UHFFFAOYSA-N 1-methylsulfonylethane Chemical compound CCS(C)(=O)=O YBJCDTIWNDBNTM-UHFFFAOYSA-N 0.000 description 1
- UHOPWFKONJYLCF-UHFFFAOYSA-N 2-(2-sulfanylethyl)isoindole-1,3-dione Chemical compound C1=CC=C2C(=O)N(CCS)C(=O)C2=C1 UHOPWFKONJYLCF-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229920001661 Chitosan Polymers 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910010941 LiFSI Inorganic materials 0.000 description 1
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 1
- 229910002991 LiNi0.5Co0.2Mn0.3O2 Inorganic materials 0.000 description 1
- 229910012258 LiPO Inorganic materials 0.000 description 1
- 229910000572 Lithium Nickel Cobalt Manganese Oxide (NCM) Inorganic materials 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- AUBNQVSSTJZVMY-UHFFFAOYSA-M P(=O)([O-])(O)O.C(C(=O)O)(=O)F.C(C(=O)O)(=O)F.C(C(=O)O)(=O)F.C(C(=O)O)(=O)F.[Li+] Chemical compound P(=O)([O-])(O)O.C(C(=O)O)(=O)F.C(C(=O)O)(=O)F.C(C(=O)O)(=O)F.C(C(=O)O)(=O)F.[Li+] AUBNQVSSTJZVMY-UHFFFAOYSA-M 0.000 description 1
- 229910020684 PbZr Inorganic materials 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- 229910002367 SrTiO Inorganic materials 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- VIEVWNYBKMKQIH-UHFFFAOYSA-N [Co]=O.[Mn].[Li] Chemical compound [Co]=O.[Mn].[Li] VIEVWNYBKMKQIH-UHFFFAOYSA-N 0.000 description 1
- QTHKJEYUQSLYTH-UHFFFAOYSA-N [Co]=O.[Ni].[Li] Chemical compound [Co]=O.[Ni].[Li] QTHKJEYUQSLYTH-UHFFFAOYSA-N 0.000 description 1
- FBDMTTNVIIVBKI-UHFFFAOYSA-N [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] Chemical compound [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] FBDMTTNVIIVBKI-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- NDPGDHBNXZOBJS-UHFFFAOYSA-N aluminum lithium cobalt(2+) nickel(2+) oxygen(2-) Chemical compound [Li+].[O--].[O--].[O--].[O--].[Al+3].[Co++].[Ni++] NDPGDHBNXZOBJS-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- 239000011329 calcined coke Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 239000003013 cathode binding agent Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 239000011311 coal-based needle coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002010 green coke Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 238000000713 high-energy ball milling Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000007561 laser diffraction method Methods 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 1
- 229910002102 lithium manganese oxide Inorganic materials 0.000 description 1
- FRMOHNDAXZZWQI-UHFFFAOYSA-N lithium manganese(2+) nickel(2+) oxygen(2-) Chemical compound [O-2].[Mn+2].[Ni+2].[Li+] FRMOHNDAXZZWQI-UHFFFAOYSA-N 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- VDVLPSWVDYJFRW-UHFFFAOYSA-N lithium;bis(fluorosulfonyl)azanide Chemical compound [Li+].FS(=O)(=O)[N-]S(F)(=O)=O VDVLPSWVDYJFRW-UHFFFAOYSA-N 0.000 description 1
- IGILRSKEFZLPKG-UHFFFAOYSA-M lithium;difluorophosphinate Chemical compound [Li+].[O-]P(F)(F)=O IGILRSKEFZLPKG-UHFFFAOYSA-M 0.000 description 1
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 description 1
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 description 1
- MCVFFRWZNYZUIJ-UHFFFAOYSA-M lithium;trifluoromethanesulfonate Chemical compound [Li+].[O-]S(=O)(=O)C(F)(F)F MCVFFRWZNYZUIJ-UHFFFAOYSA-M 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011302 mesophase pitch Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002153 silicon-carbon composite material Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 238000007614 solvation Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- ZSDSQXJSNMTJDA-UHFFFAOYSA-N trifluralin Chemical compound CCCN(CCC)C1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1[N+]([O-])=O ZSDSQXJSNMTJDA-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present application belongs to the field of battery technology, and specifically relates to a fast-charging negative active material and its preparation method, negative electrode plates, secondary batteries and electrical devices.
- the purpose of this application is to provide a fast-charging negative active material and a preparation method thereof, a negative electrode sheet, a secondary battery and an electrical device, which can significantly improve the secondary battery's energy density on the premise of having high energy density. of fast charging capabilities.
- a first aspect of the present application provides a fast-charging negative active material, wherein the fast-charging negative active material includes carbon-based material particles, a coating layer located on at least part of the surface of the carbon-based material particles, and a coating layer dispersed in the carbon-based material particles.
- the ferroelectric material in the cladding layer includes conductive carbon material, and at least part of the ferroelectric material protrudes from the surface of the cladding layer.
- the average thickness of the coating layer is H nm
- the volume average particle size Dv50 of the ferroelectric material is d 1 nm
- the fast-charge negative active material satisfies: 0.25 ⁇ H/d 1 ⁇ 1.1, optionally, 0.25 ⁇ ? H/d 1 ⁇ ? 0.5. This is beneficial to the secondary battery having high fast charging capability, high energy density and good cycle performance at the same time.
- the volume average particle size Dv50 of the ferroelectric material is d 1 nm, 0 ⁇ d 1 ⁇ ? 200, optionally, 0 ⁇ d 1 ⁇ ? 100. Therefore, less ferroelectric materials can be used for the same specific surface area, thereby reducing the energy density loss of the secondary battery.
- the mass ratio of the ferroelectric material to the carbon-based material particles is ⁇ 1 , and ⁇ 1 is (0.5-10):100, optionally (1-3):100 . This is advantageous for the secondary battery to have both high fast charging capability and high energy density.
- the mass ratio of the coating layer to the carbon-based material particles is ⁇ 2 , and ⁇ 2 is (2-10):100, optionally (2-5):100 . This is beneficial to the negative active material having high fast charging capability while also having high gram capacity, high first Coulombic efficiency and high compaction density.
- the mass ratio of the ferroelectric material to the carbon-based material particles is ⁇ 1
- the mass ratio of the coating layer to the carbon-based material particles is ⁇ 2
- ⁇ 1 : ⁇ 2 is 1:6 to 4:1, optionally 1:4 to 2:1. This is beneficial to the secondary battery that can simultaneously have high fast charging capability, high energy density and high cycle capacity retention rate.
- the graphitization degree of the coating layer is 45% to 80%.
- the conductive carbon material in the cladding layer includes amorphous carbon, optionally including hard carbon. This can further improve the rapid charging capability of the secondary battery.
- the carbon-based material particles have a graphitization degree of 88% to 96%.
- the volume average particle diameter Dv50 of the carbon-based material particles is d 2 ⁇ m, 5 ⁇ ? d 2 ⁇ ? 20, optionally, 8 ⁇ ? d 2 ⁇ ? 15. This enables the secondary battery to have higher rapid charging capability.
- the ferroelectric material includes one selected from the group consisting of perovskite structure oxides, tungsten bronze-type compounds, bismuth oxide-type layered structure compounds, lithium niobate and lithium tantalate, or Various combinations.
- the second aspect of this application provides a method for preparing a fast-charging negative active material, including the step of: S10, providing carbon-based material particles, a carbon source and a ferroelectric material.
- the carbon source includes selected from pitch, resin , one or more combinations of biomass materials; S20, uniformly mix the carbon-based material particles, the carbon source and the ferroelectric material, and perform a carbonization and sintering treatment on at least a part of the carbon-based material particles.
- the surface forms a cladding layer including conductive carbon material, wherein the ferroelectric material is dispersed in the cladding layer and at least part of the ferroelectric material protrudes from the surface of the cladding layer.
- the carbonization sintering temperature in S20 is 700°C to 1800°C, optionally 1000°C to 1300°C.
- the carbonization and sintering time in S20 is 1h to 15h, optionally 6h to 14h.
- the carbon-based material particles are prepared by the following method: S101, provide coke powder, and put the coke powder into a reaction vessel; S102, perform graphitization treatment on the coke powder to obtain Carbon-based material particles.
- a third aspect of the present application provides a negative electrode sheet, including a negative electrode current collector and a negative electrode film layer disposed on at least one surface of the negative electrode current collector, wherein the negative electrode film layer includes the fast-charging type of the first aspect of the application.
- Negative active material or fast-charging negative active material prepared by the method of the second aspect of the present application.
- a fifth aspect of the present application provides an electrical device, including the secondary battery of the fourth aspect of the present application.
- FIG. 2 is a schematic diagram of an embodiment of the secondary battery of the present application.
- FIG. 3 is an exploded schematic view of the embodiment of the secondary battery of FIG. 2 .
- FIG. 5 is a schematic diagram of an embodiment of the battery pack of the present application.
- FIG. 6 is an exploded schematic view of the embodiment of the battery pack shown in FIG. 5 .
- FIG. 7 is a schematic diagram of an embodiment of a power consumption device including the secondary battery of the present application as a power source.
- Ranges disclosed herein are defined in terms of lower and upper limits. A given range is defined by selecting a lower limit and an upper limit that define the boundaries of the particular range. Ranges defined in this manner may be inclusive or exclusive of the endpoints, and may be arbitrarily combined, that is, any lower limit may be combined with any upper limit to form a range. For example, if ranges of 60-120 and 80-110 are listed for a particular parameter, understand that ranges of 60-110 and 80-120 are also expected. Furthermore, if the minimum range values 1 and 2 are listed, and if the maximum range values 3, 4, and 5 are listed, then the following ranges are all expected: 1-3, 1-4, 1-5, 2- 3, 2-4 and 2-5.
- the numerical range “a-b” represents an abbreviated representation of any combination of real numbers between a and b, where a and b are both real numbers.
- the numerical range “0-5" means that all real numbers between "0-5" have been listed in this article, and "0-5" is just an abbreviation of these numerical combinations.
- a certain parameter is an integer ⁇ 2
- the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially.
- step (c) means that step (c) may be added to the method in any order.
- the method may include steps (a), (b) and (c). , may also include steps (a), (c) and (b), may also include steps (c), (a) and (b), etc.
- condition "A or B” is satisfied by any of the following conditions: A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists) ; Or both A and B are true (or exist).
- the electrode kinetics process usually includes the following steps. (1) Liquid phase mass transfer step in the electrolyte phase: solvated lithium ions in the electrolyte diffuse and transfer to the surface of the graphite particles; (2) Surface conversion step: During the first charge, the solvated lithium ions are adsorbed on the surface of the graphite particles and react and A solid electrolyte interface (SEI) film is formed. During the subsequent charging process, the solvated lithium ions are adsorbed on the surface of the SEI film.
- SEI solid electrolyte interface
- the lithium ions reach the surface of the graphite particles; (3) Charge exchange step: Lithium ions are obtained from the surface of the graphite particles. The electrons and form the lithium-embedded product; (4) The solid-phase mass transfer step of the lithium-intercalated product: the lithium-intercalated product diffuses from the surface of the graphite particles to the interior in a solid phase to complete the charging process.
- the inventor of this application conducted a detailed study on the electrode dynamics process during charging of secondary batteries, and found that an important factor affecting the improvement of graphite's fast charging capability is the influence of electrolyte solvation.
- the electrolyte is usually obtained by uniformly mixing lithium salts and solvent molecules. Therefore, the electrolyte usually includes three components: solvent molecules, anions, and solvated lithium ions. Before the lithium ions reach the surface of the graphite particles and are embedded in the graphite particles during the charging process, the solvated lithium ions need to undergo a desolvation process to remove the solvent molecules, but this process has a high kinetic energy barrier, for example, about 50kJ/mol to 70kJ/mol.
- lithium dendrites and “dead lithium” is another important factor affecting the improvement of the fast charging capability of secondary batteries.
- the lithium ions that cannot be inserted into the negative electrode can only be Electrons are obtained on the surface of the negative electrode, forming silvery white metallic lithium elements, namely "lithium dendrites".
- lithium dendrites not only reduces the performance of the secondary battery, such as shortening the cycle life, but also in severe cases can form sharp shapes that pierce the isolation film and cause a short circuit within the battery, which may cause catastrophic consequences such as combustion and explosion.
- the continuously deposited metallic lithium element will also fall off the surface of the negative electrode, thus forming "dead lithium" that cannot continue to participate in the reaction, resulting in a reduction in the energy density of the secondary battery.
- the fast-charge negative active material includes carbon-based material particles, a coating layer located on at least a portion of the surface of the carbon-based material particles, and a ferroelectric material dispersed in the coating layer.
- the coating layer includes conductive carbon Material, at least part of the ferroelectric material protrudes from the surface of the cladding layer.
- the negative active material of the present application has good dynamic properties and can improve the fast charging capability of the secondary battery without sacrificing the high energy density of the secondary battery. Although the mechanism is not clear yet, the inventor speculates that the possible reasons include the following points.
- the coating layer includes a conductive carbon material with good electrical conductivity, which can increase the solid phase diffusion rate of the lithium-embedded product from the surface of the particle to the interior, so that the negative active material has good dynamic properties.
- the conductive carbon material and carbon-based material particles in the coating layer are active components and can contribute to the capacity, while the ferroelectric material is an inactive component and cannot contribute to the capacity.
- It can reduce the kinetic energy barrier of the desolvation process, accelerate the speed of lithium ions reaching the surface of carbon-based material particles, and reduce the resistance of lithium ions to be embedded in the negative electrode.
- the negative active material of the present application disperses the ferroelectric material in the coating layer, and also makes at least part of the ferroelectric material protrude from the surface of the coating layer.
- the ferroelectric material has a larger exposed surface area and a greater contact area with the electrolyte. More, so that the kinetic energy barrier of the desolvation process can be reduced when the amount is small. Therefore, the secondary battery using the negative active material of the present application can have high fast charging capability without sacrificing high energy density.
- the negative active material of the present application can reduce the kinetic energy barrier of the desolvation process, accelerate the speed of lithium ions reaching the surface of carbon-based material particles, and reduce the resistance of lithium ions to be embedded in the negative electrode on the premise of containing less inactive components;
- the applied negative active material can also increase the rate of solid-phase diffusion of lithium-intercalated products from the particle surface to the interior. Therefore, the negative active material of the present application has good dynamic properties, can withstand high-rate charging, and improves the fast charging capability of the secondary battery without sacrificing the high energy density of the secondary battery.
- the dielectric constant of the ferroelectric material is above 100.
- the ferroelectric material has a high dielectric constant, its surface can provide a new path for the desolvation process of solvated lithium ions, and the higher the dielectric constant of the ferroelectric material, the lower the desolvation process. The better the kinetic energy barrier is, but its effect will not continue to increase.
- the higher the dielectric constant the higher the requirements for the preparation process of ferroelectric materials, which also increases the production cost.
- the dielectric constant of the ferroelectric material may be 100 to 100,000, for example, 100 to 50,000, 100 to 25,000, 100 to 10,000, 100 to 5,000, 100 to 4,000, 100 to 3000, 100 to 2000, 100 to 1000, 100 to 500, 150 to 50000, 150 to 25000, 150 to 10000, 150 to 5000, 150 to 4000, 150 to 3000, 150 to 2000, 150 to 1000, 150 to 500, 200 to 50000, 200 to 25000, 200 to 10000, 200 to 5000, 200 to 4000, 200 to 3000, 200 to 2000 or 200 to 1000.
- the dielectric constant of a ferroelectric material refers to the dielectric constant at room temperature (25 ⁇ 5°C), which has a well-known meaning in the art and can be tested using instruments and methods known in the art.
- C represents the capacitance, in Farad (F);
- d represents the sample thickness, in cm;
- A represents the sample area, in cm 2 ;
- the test conditions can be 1KHz, 1.0V, 25 ⁇ 5°C.
- the test standard can be based on GB/T 11297.11-2015.
- the ferroelectric material is insoluble in water and has a high Curie temperature, for example, usually above 80°C. As a result, the effect of ferroelectric materials can be better exerted during the use of secondary batteries.
- the perovskite structure oxide may include BaTiO 3 , Ba 1-x1 Sr x1 TiO 3 (0 ⁇ x1 ⁇ ?1), SrTiO 3 , PbTiO 3 , PbZr y1 Ti 1-y1 O 3 (0 ⁇ y1 ⁇ 1), one or a combination of BaZr y2 Ti 1-y2 O 3 (0 ⁇ y2 ⁇ 1), KNbO 3 and NaNbO 3 .
- the tungsten bronze-type compound may have a molecular formula M z WO 3 .
- M includes one or more combinations selected from Na, K, Rb and Cs, 0 ⁇ z ⁇ 1.
- the tungsten bronze compound may include one or a combination of more selected from Na z1 WO 3 (0 ⁇ z1 ⁇ 1), K z2 WO 3 (0 ⁇ z2 ⁇ 1).
- the bismuth oxide type layered structure compound has a molecular formula (Bi 2 O 2 ) (C n-1 D n O 3n+1 ).
- C includes one or more combinations selected from Na, K, Ba, Sr, Pb, Ca, Ln and Bi
- D includes selected from Zr, Cr, Nb, Ta, Mo, W, Fe, Ti and V One or a combination of more of them, 2 ⁇ n ⁇ ? 5.
- the bismuth oxide layered structure compound may be one or a combination of more of SrBi 2 Nb 2 O 9 , SrBi 2 Ta 2 O 9 , SrBi 2 Nb 2 O 9 , and Bi 4 Ti 3 O 12 .
- the mass ratio of the ferroelectric material to the carbon-based material particles is ⁇ 1 , and ⁇ 1 is (0.5 ⁇ 10):100.
- ⁇ 1 is (0.5 ⁇ 9):100, (0.5 ⁇ 8):100, (0.5 ⁇ 7):100, (0.5 ⁇ 6):100, (0.5 ⁇ 5):100, (0.5 ⁇ 4):100, (0.5 ⁇ 3):100, (1 ⁇ 9):100, (1 ⁇ 8):100, (1 ⁇ 7):100, (1 ⁇ 6):100, (1 ⁇ 5) :100, (1 ⁇ 4):100 or (1 ⁇ 3):100.
- ⁇ 1 When ⁇ 1 is within a suitable range, it is beneficial for the secondary battery to have both high fast charging capability and high energy density. And it can also effectively avoid the following situations: when ⁇ 1 is larger, the content of inactive components in the negative active material particles increases and the content of active components decreases, which may cause the secondary battery to lose more energy density; ⁇ 1 is larger When ⁇ 1 is large, the ferroelectric material may also cover more of the surface of the negative active material, thereby reducing the surface active sites of the negative active material, which may also lead to poor fast charging capability and cycle performance of the secondary battery; when ⁇ 1 is small, iron The content of the electrical material is small, and its effect in reducing the kinetic energy barrier of the desolvation process may not be obvious, which may not be conducive to improving the fast charging capability of the secondary battery.
- ⁇ 2 When ⁇ 2 is within a suitable range, it is beneficial for the negative active material to have high fast charging capability as well as high gram capacity, high first Coulombic efficiency and high compaction density, so that the secondary battery can simultaneously have high fast charging capability, high Energy density and high cycle capacity retention. And it can also effectively avoid the following situations: when ⁇ 2 is large, the coating layer is thicker and the conductive carbon material content is high. Since the conductive carbon material has more pores and a larger specific surface area, the negative active material and the electrolyte will be separated. There are many interface side reactions between them; at the same time, when ⁇ 2 is large, the surface morphology of the conductive carbon material is rough and there are many surface defects, which makes the negative active material difficult to compact.
- ⁇ 1 : ⁇ 2 When ⁇ 1 : ⁇ 2 is within a suitable range, it is beneficial for the negative active material to have high fast charging capability as well as high gram capacity, high first Coulombic efficiency and high compaction density, so that the secondary battery can have high fast charging at the same time. capacity, high energy density and high cycle capacity retention. And it can also effectively avoid the following situation: when ⁇ 1 : ⁇ 2 is larger, the content of inactive components in the negative active material particles increases and the content of active components decreases, which may cause the secondary battery to lose more energy density.
- the cladding layer includes conductive carbon material.
- the conductive carbon material includes amorphous carbon.
- Amorphous carbon refers to a transition-state carbon material with a low degree of graphitization and crystallization, which is approximately amorphous (or has no fixed shape and periodic structure). It can be processed by carbon sources (such as asphalt, resin, biomass materials, etc.) Obtained by carbonization and sintering treatment.
- the interlayer spacing of amorphous carbon is large, and it does not cause volume shrinkage and expansion effects during the extraction and insertion of lithium ions. Therefore, its crystal structure is more stable, allowing the negative electrode active material to have good dynamic properties and withstand large loads. Rate charging can improve the rapid charging capability of secondary batteries.
- the amorphous carbon includes soft carbon, hard carbon or combinations thereof.
- the conductive carbon material includes hard carbon, thereby further improving the fast charging capability of the secondary battery.
- the carbon-based material particles include one or a combination of one or more selected from graphite (eg, artificial graphite, natural graphite, oxidized graphite, etc.), mesocarbon microspheres, hard carbon, and soft carbon. , optionally selected from graphite.
- graphite eg, artificial graphite, natural graphite, oxidized graphite, etc.
- mesocarbon microspheres hard carbon
- soft carbon optionally selected from graphite.
- graphite has the advantages of stable cycle performance and high gram capacity, which can also enable secondary batteries to have high energy density and high cycle stability.
- the coating layer has a graphitization degree of 45% to 80%.
- the carbon-based material particles have a degree of graphitization of 88% to 96%.
- the inventor's research has found that when the coating layer and the carbon-based material particles also satisfy the graphitization degree within the above range, it will help the crystal structure of the coating layer and the carbon-based material particles to be reasonably matched, thereby effectively improving the lithium
- the solid-phase diffusion rate of ions improves the rapid charging capability and cycle performance of secondary batteries.
- the morphology of the carbon-based material particles is primary particles, secondary particles, or a combination thereof. Secondary particles are usually obtained by agglomeration of primary particles.
- the ratio of the volume average particle diameter Dv50 of the primary particle to the volume average particle diameter Dv50 of the secondary particles it consists of is 0.2 to 0.5.
- the volume average particle diameter Dv50 of the carbon-based material particles is d 2 ⁇ m, 5 ⁇ ? d 2 ⁇ 20, optionally, 8 ⁇ ? d 2 ⁇ 15.
- the volume average particle size Dv50 of the carbon-based material particles is within a suitable range, it is beneficial for the negative active material of the present application to have higher electrochemical activity, thereby enabling the secondary battery to have higher rapid charging capability.
- the capacity and energy density of the secondary battery may become worse; when the volume average particle size Dv50 of the carbon-based material particles is larger, the number of active sites on the particle surface decreases, and the path for the lithium-embedded product to diffuse from the solid phase on the particle surface to the interior is longer. This may be detrimental to the improvement of the fast charging capability of the secondary battery.
- the powder compaction density of the fast-charge negative active material under a force of 20,000N is 1.5g/cm 3 to 1.9g/cm 3 , optionally 1.5g/cm 3 to 1.7g /cm 3 .
- the negative electrode film layer can have a higher compaction density, and the secondary battery can have a higher energy density.
- the negative electrode film layer can also have a strong ability to maintain the pore structure during the cycle, thereby making the electrolyte wettability of the negative electrode sheet better. Good, it can better improve the cycle performance of secondary batteries.
- the graphitization degree of a material has a well-known meaning in the art, and can be tested using instruments and methods known in the art.
- an X-ray diffractometer such as Bruker D8Discover
- the degree of graphitization of the material is calculated as 0.3354) ⁇ 100%.
- d 002 is the interlayer spacing of the (002) crystal plane in the crystal structure of the material expressed in nanometers (nm).
- the specific surface area of a material has a well-known meaning in the art, and can be tested using instruments and methods known in the art.
- the nitrogen adsorption specific surface area analysis test can pass the Tri-Star3020 specific surface area pore size of the American Micromeritics company. Analytical tester is performed.
- the powder compaction density of the material is a meaning known in the art, and can be tested using instruments and methods known in the art.
- An exemplary test method is as follows: weigh 1g of material, add it to a mold with a base area of 1.327cm2 , pressurize it to 2000kg (equivalent to 20000N), maintain the pressure for 30s, then release the pressure, maintain it for 10s, then record and calculate the material's Powder compaction density under 20000N force.
- the above-mentioned various parameter tests for the negative electrode active material can be done by sampling and testing before coating, or by sampling and testing from the negative electrode film layer after cold pressing.
- the sampling can be carried out as follows: arbitrarily select a cold-pressed negative electrode film layer, and sample the negative active material (for example, you can choose Blade scraping powder sampling); place the collected negative active material powder in deionized water, then filter and dry it, and then sinter the dried negative active material at a certain temperature and time (for example, 400°C, 2h), remove the binder and conductive agent to obtain the negative active material test sample.
- the second aspect of the embodiment of the present application provides a method for preparing the fast-charging negative active material of the first aspect of the present application, which includes the steps: S10, providing carbon-based material particles, a carbon source and a ferroelectric material; S20, preparing the said Carbon-based material particles, the carbon source and the ferroelectric material are uniformly mixed, and a coating layer including conductive carbon material is formed on at least part of the surface of the carbon-based material particles through carbonization and sintering, wherein the ferroelectric material is dispersed The ferroelectric material is in the cladding layer and at least part of the ferroelectric material protrudes from the surface of the cladding layer.
- carbon source refers to a compound capable of forming conductive carbon materials.
- the carbon source includes one or a combination of more selected from organic carbon sources and inorganic carbon sources.
- the carbon source is an organic carbon source.
- the carbon source includes one or a combination of one or more selected from pitch, resin, and biomass materials.
- the asphalt includes one or a combination of one or more selected from coal asphalt and petroleum asphalt, optionally petroleum asphalt.
- the resin includes one or a combination of more selected from phenolic resin and epoxy resin.
- the biomass material refers to a material derived from living organisms such as animals, plants, and microorganisms. It is mainly composed of organic polymer substances. Its chemical composition is mainly composed of three elements: carbon, hydrogen and oxygen. For example, it can It is polysaccharide (such as starch, sucrose polymer, glucose polymer, cellulose, etc.).
- the carbonization sintering temperature in S20 is 700°C to 1800°C, more optionally 1000°C to 1300°C.
- the carbonization and sintering time in S20 is 1h to 15h, optionally 6h to 14h.
- the carbon source can be carbonized, and a coating layer containing a conductive carbon material can be formed on at least part of the surface of the carbon-based material particles, and at the same time, the coating layer
- the layers can also have suitable thickness and degree of graphitization.
- the carbon-based material particles can be commercially available products, or alternatively, are prepared by the following method: S101, provide coke powder, and put the coke powder into a reaction vessel; S102, add the coke powder to the reaction vessel.
- the coke powder is graphitized to obtain carbon-based material particles.
- the coke powder can be a commercially available product, or alternatively, is prepared by the following method: S1011, coking the coke raw material to obtain coke; S1012, crushing, shaping, and classifying the obtained coke, Obtain coke powder.
- coke raw material refers to the component that can be processed to obtain “coke”, that is, the raw material used to prepare coke;
- coke refers to the product obtained by coking the coke raw material;
- coke powder and coke powder are the same as “coke powder”.
- Coke is completely the same in composition, the difference is that “coke powder” refers to “coke” in the form of powder with a certain particle size, that is, “coke” is obtained after "coke” is crushed and processed.
- the coke obtained in S1011 includes one or a combination of more selected from the group consisting of petroleum-based non-needle coke, petroleum-based needle coke, coal-based non-needle coke, and coal-based needle coke. More optionally, the coke obtained in S1011 includes one or more combinations of petroleum-based non-needle coke (such as petroleum-based calcined coke, petroleum-based green coke), petroleum-based needle coke. In particular, the coke obtained in S1011 is petroleum-based coke.
- the use of appropriate coke energy allows the prepared carbon-based material particles to have an appropriate number of end faces and defects, thereby having better ion transmission and electron transmission properties and higher structural stability, thereby improving the rapid charging of secondary batteries. capacity and cycle performance.
- the coking process of the coke raw material in S1011 is performed in a delayed coking device.
- the delayed coking device includes a heating furnace and a coke tower.
- the delayed coking process means that the coke raw material is quickly heated to the required coking treatment temperature in the heating furnace, and then enters the coke tower, where it undergoes preheating, cold coking and other processes. Generate focus.
- the obtained coke can be crushed using equipment and methods known in the art, such as air flow mill, mechanical mill, roller mill or other crushing equipment.
- S101 also includes: adding a binder to the reaction vessel, uniformly mixing the binder and the coke powder and then granulating. Adding a binder can make the obtained carbon-based material particles have a better degree of secondary particles, which is beneficial to improving the ion transmission and electron transmission properties of the negative active material while also making it have higher structural stability.
- the mass percentage of the binder is 3% to 12%, more optionally 5% to 8%, based on the total mass of the coke powder.
- the content of the binder is within an appropriate range to avoid excessive agglomeration of particles.
- the binder includes one or a combination of more selected from coal pitch, petroleum pitch, mesophase pitch, phenolic resin, epoxy resin, and petroleum resin.
- the granulation process can be carried out using equipment and methods known in the art, such as granulators.
- the granulator usually includes a stirred reactor and a module for temperature control of the reactor. By regulating the stirring speed, heating rate, granulation temperature, cooling rate, etc. during the granulation process, the degree of granulation and the structural strength of the particles can be controlled, so that the volume average particle size Dv50 of the finally prepared carbon-based material particles can be at a certain value. within the required range.
- the graphitization treatment time in S102 may be 20h to 48h.
- Graphitization treatment can make the carbon-based material particles have a suitable degree of graphitization to increase the gram capacity of the negative active material; graphitization treatment can also make the carbon-based material particles have a smaller lattice expansion rate to improve structural stability; Graphitization treatment can also effectively eliminate bulk structural defects in carbon-based material particles to improve the cycle stability of secondary batteries.
- Graphitization treatment can be carried out using equipment and methods known in the art, such as a graphitization furnace, in particular an Acheson graphitization furnace. After the graphitization process is completed, a small amount of oversized particles formed by agglomeration during the graphitization process can also be removed by screening. This can prevent oversized particles from affecting the processing performance of the obtained negative electrode active material, such as the stability of the negative electrode slurry. , coating performance, etc.
- the preparation method of the fast-charging negative active material includes the steps of: placing coke powder and a binder into a reaction vessel and uniformly mixing them before granulating; and subjecting the obtained granulated product to graphitization. , obtain carbon-based material particles; uniformly mix the obtained carbon-based material particles with a carbon source and a ferroelectric material, and form a coating layer including a conductive carbon material on at least part of the surface of the carbon-based material particles through carbonization and sintering, wherein , the ferroelectric material is dispersed in the cladding layer and at least part of the ferroelectric material protrudes from the surface of the cladding layer.
- the negative electrode film layer may also include other negative electrode active materials known in the art for secondary batteries.
- the other negative active materials include one or a combination of one or more selected from natural graphite, artificial graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate.
- the silicon-based material may include one or a combination of more selected from the group consisting of elemental silicon, silicon oxide, silicon-carbon composite, silicon-nitride composite and silicon alloy material.
- the tin-based material may include one or a combination of more selected from the group consisting of elemental tin, tin oxide and tin alloy materials.
- the negative electrode film layer optionally further includes a negative electrode binder.
- the negative electrode binder may include styrene-butadiene rubber (SBR), water-soluble unsaturated resin SR-1B, water-based acrylic resin ( For example, polyacrylic acid (PAA), polymethacrylic acid (PMAA), polyacrylic acid sodium (PAAS), polyacrylamide (PAM), polyvinyl alcohol (PVA), sodium alginate (SA) and carboxymethyl chitosan (CMCS).
- SBR styrene-butadiene rubber
- SR-1B water-soluble unsaturated resin
- PAA polyacrylic acid
- PMAA polymethacrylic acid
- PAAS polyacrylic acid sodium
- PAM polyacrylamide
- PVA polyvinyl alcohol
- SA sodium alginate
- CMCS carboxymethyl chitosan
- the mass percentage of the negative electrode binder is less than 5%.
- the negative electrode film layer optionally includes other additives.
- other auxiliaries may include thickeners, such as sodium carboxymethylcellulose (CMC-Na), PTC thermistor materials, and the like.
- CMC-Na sodium carboxymethylcellulose
- PTC thermistor materials such as sodium carboxymethylcellulose (CMC-Na), PTC thermistor materials, and the like.
- the mass percentage of the other additives is less than 2%.
- the negative electrode current collector may be a metal foil or a composite current collector.
- the metal foil copper foil or copper alloy foil can be used.
- the composite current collector may include a polymer material base layer and a metal material layer formed on at least one surface of the polymer material base layer.
- the metal material may include copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver. and a combination of one or more silver alloys.
- the polymer material base layer may include polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate ( One or a combination of one or more of PBT), polystyrene (PS) and polyethylene (PE).
- the negative electrode film layer is usually formed by coating the negative electrode slurry on the negative electrode current collector, drying, and cold pressing.
- the negative electrode slurry is usually formed by dispersing the negative electrode active material, optional conductive agent, optional binder, and other optional additives in a solvent and stirring evenly.
- the solvent may be N-methylpyrrolidone (NMP) or deionized water, but is not limited thereto.
- the negative electrode plate does not exclude other additional functional layers in addition to the negative electrode film layer.
- the negative electrode sheet described in the present application further includes a conductive undercoat layer (for example, made of Conductive agent and adhesive).
- the negative electrode sheet described in this application further includes a protective layer covering the surface of the negative electrode film layer.
- the fourth aspect of the embodiment of the present application provides a secondary battery, which includes the negative electrode plate of the third aspect of the present application.
- Secondary batteries also known as rechargeable batteries or storage batteries, refer to batteries that can be recharged to activate active materials and continue to be used after the battery is discharged.
- a secondary battery includes an electrode assembly and an electrolyte.
- the electrode assembly usually includes a positive electrode plate, a negative electrode plate and a separator.
- the isolation film is placed between the positive electrode piece and the negative electrode piece. It mainly prevents short circuit between the positive electrode and the negative electrode and allows lithium ions to pass through.
- the electrolyte plays a role in conducting lithium ions between the positive electrode piece and the negative electrode piece.
- the secondary battery of the present application may be a lithium-containing secondary battery, and in particular, may be a lithium-ion secondary battery.
- the negative electrode sheet used in the secondary battery of the present application is the negative electrode sheet of any embodiment of the third aspect of the present application.
- Examples of the lithium-containing phosphate with an olivine structure may include lithium iron phosphate, a composite material of lithium iron phosphate and carbon, a lithium manganese phosphate, a composite material of lithium manganese phosphate and carbon, a lithium manganese iron phosphate, a lithium manganese iron phosphate and A composite material of carbon and a combination of one or more of its respective modifying compounds.
- the cathode active material may include a combination of one or more of the lithium transition metal oxide shown in Formula 1 and its modified compounds.
- the modified compounds of each of the above-mentioned positive electrode active materials may be doping modifications and/or surface coating modifications of the positive electrode active materials.
- the positive electrode film layer optionally further includes a positive electrode conductive agent.
- a positive electrode conductive agent includes selected from the group consisting of superconducting carbon, conductive graphite, acetylene black, carbon black, Ketjen black, carbon dots, carbon nanotubes, A combination of one or more of graphene and carbon nanofibers.
- the mass percentage of the cathode conductive agent is less than 5%.
- the positive electrode film layer optionally further includes a positive electrode binder.
- the positive electrode binder may include polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), vinylidene fluoride-tetrafluoroethylene, etc.
- PVDF polyvinylidene fluoride
- PTFE polytetrafluoroethylene
- vinylidene fluoride-tetrafluoroethylene etc.
- the mass percentage of the cathode binder is less than 5% based on the total mass of the cathode film layer.
- the positive electrode current collector may be a metal foil or a composite current collector.
- the metal foil aluminum foil or aluminum alloy foil can be used.
- the composite current collector may include a polymer material base layer and a metal material layer formed on at least one surface of the polymer material base layer.
- the metal material may include aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver. and a combination of one or more silver alloys.
- the polymer material base layer may include polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate ( One or a combination of one or more of PBT), polystyrene (PS) and polyethylene (PE).
- the positive electrode film layer is usually formed by coating the positive electrode slurry on the positive electrode current collector, drying, and cold pressing.
- the positive electrode slurry is usually formed by dispersing the positive electrode active material, optional conductive agent, optional binder and any other components in a solvent and stirring evenly.
- the solvent may be N-methylpyrrolidone (NMP), but is not limited thereto.
- the electrolyte solution of the present application can be an electrolyte solution known in the art and used for secondary batteries.
- the electrolyte solution includes lithium salt and organic solvent.
- isolation membrane there is no particular restriction on the type of isolation membrane in this application, and any well-known porous structure isolation membrane with good chemical stability and mechanical stability can be used.
- the material of the isolation membrane may include one or a combination of more selected from the group consisting of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride.
- the isolation film may be a single-layer film or a multi-layer composite film. When the isolation film is a multi-layer composite film, the materials of each layer may be the same or different.
- the positive electrode piece, the isolation film and the negative electrode piece can be made into an electrode assembly through a winding process or a lamination process.
- the secondary battery may include an outer packaging.
- the outer packaging can be used to package the above-mentioned electrode assembly and electrolyte.
- the outer packaging of the secondary battery may be a hard shell, such as a hard plastic shell, an aluminum shell, a steel shell, etc.
- the outer packaging of the secondary battery may also be a soft bag, such as a bag-type soft bag.
- the soft bag may be made of plastic, such as one or a combination of polypropylene (PP), polybutylene terephthalate (PBT) and polybutylene succinate (PBS). .
- the outer package may include a housing 51 and a cover 53 .
- the housing 51 may include a bottom plate and side plates connected to the bottom plate, and the bottom plate and the side plates enclose to form a receiving cavity.
- the housing 51 has an opening communicating with the accommodation cavity, and the cover plate 53 is used to cover the opening to close the accommodation cavity.
- the positive electrode piece, the negative electrode piece and the isolation film can be formed into the electrode assembly 52 through a winding process or a lamination process.
- the electrode assembly 52 is packaged in the containing cavity.
- the electrolyte soaks into the electrode assembly 52 .
- the number of electrode assemblies 52 contained in the secondary battery 5 can be one or more, and can be adjusted according to needs.
- the positive electrode sheet, the separator, the negative electrode sheet, and the electrolyte may be assembled to form a secondary battery.
- the positive electrode sheet, isolation film, and negative electrode sheet can be formed into an electrode assembly through a winding process or a lamination process.
- the electrode assembly is placed in an outer package, dried, and then injected with electrolyte. After vacuum packaging, standing, and Through processes such as formation and shaping, secondary batteries are obtained.
- the secondary batteries according to the present application can be assembled into battery modules.
- the number of secondary batteries contained in the battery module can be multiple, and the specific number can be adjusted according to the application and capacity of the battery module.
- FIG. 4 is a schematic diagram of the battery module 4 as an example.
- a plurality of secondary batteries 5 may be arranged in sequence along the length direction of the battery module 4 .
- the plurality of secondary batteries 5 can be fixed by fasteners.
- the battery module 4 may further include a housing having a receiving space in which a plurality of secondary batteries 5 are received.
- the above-mentioned battery modules can also be assembled into a battery pack, and the number of battery modules contained in the battery pack can be adjusted according to the application and capacity of the battery pack.
- the battery pack 1 may include a battery box and a plurality of battery modules 4 arranged in the battery box.
- the battery box includes an upper box 2 and a lower box 3 .
- the upper box 2 is used to cover the lower box 3 and form a closed space for accommodating the battery module 4 .
- Multiple battery modules 4 can be arranged in the battery box in any manner.
- a fifth aspect of the embodiment of the present application provides an electrical device, which includes at least one of a secondary battery, a battery module and a battery pack of the present application.
- the secondary battery, battery module and battery pack may be used as a power source for the electrical device or as an energy storage unit for the electrical device.
- the electrical device may be, but is not limited to, mobile devices (such as mobile phones, laptops, etc.), electric vehicles (such as pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric Golf carts, electric trucks, etc.), electric trains, ships and satellites, energy storage systems, etc.
- the power-consuming device can select a secondary battery, a battery module or a battery pack according to its usage requirements.
- FIG. 7 is a schematic diagram of an electrical device as an example.
- the electric device is a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, etc.
- battery packs or battery modules can be used.
- the power-consuming device may be a mobile phone, a tablet computer, a laptop computer, etc.
- the electrical device is usually required to be light and thin, and secondary batteries can be used as power sources.
- the secondary battery of Comparative Example 1 was prepared similarly to Example 1 except that conventional uncoated artificial graphite was used as the negative electrode active material. Specifically, artificial graphite is prepared according to the following method.
- the petroleum residue is subjected to delayed coking at 490°C to 510°C to obtain petroleum non-needle coke.
- the raw coke is crushed, shaped and classified to obtain coke powder.
- the obtained coke powder is mixed with a binder.
- Coal pitch is mixed and then granulated; the obtained granulated product is placed in a graphite crucible, and then the graphite crucible is placed in the Acheson graphitization furnace.
- Resistor materials are filled around the graphite crucible, and electricity is applied to allow current to flow through the resistor.
- the material generates heat energy and is graphitized at about 3000°C for about 30 hours to obtain artificial graphite particles.
- the volume average particle size Dv50 of artificial graphite particles is approximately 9.8 ⁇ m, and the degree of graphitization is approximately 92%.
- the secondary battery of Comparative Example 2 was prepared similarly to Example 1, except that the negative active material was prepared according to the following method.
- the temperature in the highest temperature zone is about 1150°C, and the operating time in the highest temperature zone is about 12 hours, so that at least part of the artificial graphite particles are in the orbital kiln.
- An amorphous carbon coating layer is formed on the surface to obtain the negative active material.
- the obtained button cell was left to stand for 12 hours, it was discharged at 25°C with a constant current of 0.05C to 0.005V, left to stand for 10 minutes, and then discharged to a constant current of 0.005V with a current of 50 ⁇ A, left to stand for 10min, and then discharged to a constant current of 10 ⁇ A. Discharge to 0.005V; then charge to 2V with a constant current of 0.1C, and record the charging capacity.
- the ratio of the charging capacity to the mass of the negative active material is the initial gram capacity of the negative active material.
- the secondary battery prepared above was charged at a constant current of 0.33C to the charge cut-off voltage of 4.4V, then charged at a constant voltage to a current of 0.05C, left to stand for 5 minutes, and then discharged at a constant current of 0.33C to the discharge cut-off voltage. 2.8V, record its actual capacity as C0.
- the charging windows below are recorded as C10%SOC, C20%SOC, C30%SOC, C40%SOC, C50%SOC, C60%SOC, C70%SOC, C80%SOC, according to the formula (60/C20%SOC+60 /C30%SOC+60/C40%SOC+60/C50%SOC+60/C60%SOC+60/C70%SOC+60/C80%SOC) ⁇ 10% calculation shows that the secondary battery is charged from 10% SOC to Charging time T for 80% SOC. The shorter the charging time T, the better the fast charging performance of the secondary battery.
- Table 2 gives the negative active material preparation parameters of Examples 1 to 16.
- Table 3 shows the test results of Examples 1 to 16 and Comparative Examples 1 to 4 according to the above performance test method.
- Comparative Example 2 uses amorphous carbon-coated artificial graphite as the negative active material, which can improve the fast charging performance and cycle performance of secondary batteries to a certain extent, but the improvement effect is limited and cannot satisfy people. Requirements for higher fast charging capabilities and longer cycle life of secondary batteries.
- Comparative Example 3 also added ferroelectric materials to the negative electrode slurry, which can further improve the fast charging performance and cycle performance of the secondary battery.
- the improvement effect is limited and cannot satisfy people's expectations for secondary batteries. Requirements for higher fast charging capabilities and longer cycle life. The possible reason is that by physically mixing the ferroelectric material into the negative electrode slurry, on the one hand, the density of the ferroelectric material is high and it is easy to settle in the negative electrode slurry, making it difficult to form a stable negative electrode slurry, which affects the production yield and negative electrode performance.
- Comparative Example 4 uses barium titanate-coated artificial graphite as the negative active material, but the negative active material is obtained by direct ball milling, which improves the performance of the secondary battery to a certain extent compared with Comparative Example 1. Fast charging performance and cycle performance, but the improvement effect is limited and cannot meet people's requirements for higher fast charging capabilities and longer cycle life of secondary batteries. The possible reason is that, on the one hand, the direct ball milling method combines artificial graphite particles and ferroelectric material particles by impacting and grinding them to form a negative active material, but high-energy ball milling will destroy the shape of the artificial graphite particles that have been formed.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
二次电池的荷电状态SOC | 充电倍率(C) |
0~10% | 0.33 |
10%~20% | 5.2 |
20%~30% | 4.5 |
30%~40% | 4.2 |
40%~50% | 3.3 |
50%~60% | 2.6 |
60%~70% | 2.0 |
70%~80% | 1.5 |
80%~100% | 0.33 |
Claims (17)
- 一种快充型负极活性材料,其中,所述快充型负极活性材料包括碳基材料颗粒、位于所述碳基材料颗粒至少一部分表面的包覆层以及分散于所述包覆层中的铁电材料,所述包覆层包括导电碳材料,至少部分铁电材料凸出于所述包覆层的表面。
- 根据权利要求1所述的快充型负极活性材料,其中,所述包覆层的平均厚度为H nm,所述铁电材料的体积平均粒径Dv50为d 1nm,并且所述快充型负极活性材料满足:0.25≤H/d 1≤1.1,可选地,0.25≤H/d 1≤0.5。
- 根据权利要求1-2中任一项所述的快充型负极活性材料,其中,所述铁电材料的体积平均粒径Dv50为d 1nm,0<d 1≤200,可选地,0<d 1≤100;和/或,所述包覆层的平均厚度为Hnm,20≤H≤100,可选地,20≤H≤50。
- 根据权利要求1-3中任一项所述的快充型负极活性材料,其中,所述铁电材料与所述碳基材料颗粒的质量比为α 1,α 1为(0.5~10):100,可选地为(1~3):100;和/或,所述包覆层与所述碳基材料颗粒的质量比为α 2,α 2为(2~10):100,可选地为(2~5):100。
- 根据权利要求1-4中任一项所述的快充型负极活性材料,其中,所述铁电材料与所述碳基材料颗粒的质量比为α 1,所述包覆层与所述碳基材料颗粒的质量比为α 2,α 1:α 2为1:6至4:1,可选地为1:4至2:1。
- 根据权利要求1-5中任一项所述的快充型负极活性材料,其中,所述包覆层的石墨化度为45%至80%;和/或,所述碳基材料颗粒的石墨化度为88%至96%。
- 根据权利要求1-6中任一项所述的快充型负极活性材料,其中,所述碳基材料颗粒的体积平均粒径Dv50为d 2μm,5≤d 2≤20,可选地,8≤d 2≤15。
- 根据权利要求1-7中任一项所述的快充型负极活性材料,其中,所述碳基材料颗粒的形貌为一次颗粒、二次颗粒或其组合,可选地,在所述二次颗粒形貌的碳基材料颗粒中,所述一次颗粒的体积平均粒径Dv50与其所组成的二次颗粒的体积平均粒径Dv50的比值为0.2至0.5。
- 根据权利要求1-8中任一项所述的快充型负极活性材料,其中,所述铁电材料的介电常数为100以上,可选地为100至100000;和/或,所述铁电材料的居里温度为80℃以上。
- 根据权利要求1-9中任一项所述的快充型负极活性材料,其中,所述碳基材料颗粒包括选自石墨、中间相碳微球、硬碳和软碳中的一种或多种的组合,可选地选自石墨;和/或,所述包覆层中的导电碳材料包括无定形碳,可选地包括硬碳;和/或,所述铁电材料包括选自钙钛矿结构氧化物、钨青铜型化合物、铋氧化物型层状结构化合物、铌酸锂和钽酸锂中的一种或多种的组合。
- 根据权利要求1-10中任一项所述的快充型负极活性材料,其中,所述快充型负极活性材料满足如下条件(1)至(3)中的至少一者:(1)所述快充型负极活性材料的体积平均粒径Dv50为5μm至20μm,可选地为8μm至15μm;(2)所述快充型负极活性材料的比表面积为0.8m 2/g至1.3m 2/g,可选地为0.9m 2/g至1.2m 2/g;(3)所述快充型负极活性材料在20000N作用力下的粉体压实密度为1.5g/cm 3至1.9g/cm 3,可选地为1.5g/cm 3至1.7g/cm 3。
- 一种快充型负极活性材料的制备方法,包括步骤:S10,提供碳基材料颗粒、碳源和铁电材料,可选地,所述碳源包括选自沥青、树脂、生物质材料中的一种或多种的组合;S20,将所述碳基材料颗粒、所述碳源和所述铁电材料均匀混合,经碳化烧结处理在所述碳基材料颗粒至少一部分表面形成包括导电碳材料的包覆层,其中,所述铁电材料分散于所述包覆层中并且至少部分铁电材料凸出于所述包覆层的表面。
- 根据权利要求12所述的方法,其中,S20中的碳化烧结温度为700℃至1800℃,可选地为1000℃至1300℃;和/或,S20中的碳化烧结时间为1h至15h,可选地为6h至14h。
- 根据权利要求12-13中任一项所述的方法,其中,所述碳基材料颗粒通过以下方法制备:S101,提供焦粉末,将所述焦粉末放入反应容器中;S102,对所述焦粉末进行石墨化处理,得到碳基材料颗粒。
- 一种负极极片,包括负极集流体以及设置在所述负极集流体至少一个表面上的负极膜层,其中,所述负极膜层包括权利要求1-11中任一项所述的快充型负极活性材料或通过权利要求12-14中任一项所述的方法制备的快充型负极活性材料。
- 一种二次电池,包括权利要求15所述的负极极片。
- 一种用电装置,包括权利要求16所述的二次电池。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22947406.9A EP4451363A1 (en) | 2022-06-24 | 2022-06-24 | Fast-charging negative electrode active material and preparation method therefor, negative electrode sheet, secondary battery, and electric device |
PCT/CN2022/101194 WO2023245639A1 (zh) | 2022-06-24 | 2022-06-24 | 快充型负极活性材料及其制备方法、负极极片、二次电池及用电装置 |
JP2024521843A JP2024537572A (ja) | 2022-06-24 | 2022-06-24 | 急速充電式負極活性材料及びその作製方法、負極シート、二次電池及び電力消費装置 |
CN202280005863.0A CN116806376B (zh) | 2022-06-24 | 2022-06-24 | 快充型负极活性材料及其制备方法、负极极片、二次电池及用电装置 |
KR1020247011747A KR20240054369A (ko) | 2022-06-24 | 2022-06-24 | 급속 충전형 부극 활성 재료 및 이의 제조 방법, 부극 시트, 이차 전지 및 전기 장치 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2022/101194 WO2023245639A1 (zh) | 2022-06-24 | 2022-06-24 | 快充型负极活性材料及其制备方法、负极极片、二次电池及用电装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023245639A1 true WO2023245639A1 (zh) | 2023-12-28 |
Family
ID=88079803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2022/101194 WO2023245639A1 (zh) | 2022-06-24 | 2022-06-24 | 快充型负极活性材料及其制备方法、负极极片、二次电池及用电装置 |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP4451363A1 (zh) |
JP (1) | JP2024537572A (zh) |
KR (1) | KR20240054369A (zh) |
CN (1) | CN116806376B (zh) |
WO (1) | WO2023245639A1 (zh) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117878429B (zh) * | 2024-03-11 | 2024-07-19 | 蜂巢能源科技股份有限公司 | 一种电池及电池设计方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101855756A (zh) * | 2008-12-02 | 2010-10-06 | 科卡姆有限公司 | 用于锂蓄电池的壳核型阳极活性材料及其制备方法以及包含所述材料的锂蓄电池 |
JP2016039114A (ja) * | 2014-08-11 | 2016-03-22 | トヨタ自動車株式会社 | 非水電解質二次電池 |
JP2016134267A (ja) * | 2015-01-19 | 2016-07-25 | トヨタ自動車株式会社 | リチウムイオン二次電池 |
JP2017054615A (ja) * | 2015-09-07 | 2017-03-16 | トヨタ自動車株式会社 | 被覆負極活物質 |
CN110299556A (zh) * | 2018-03-22 | 2019-10-01 | 株式会社东芝 | 电极、二次电池、电池组和车辆 |
CN114217139A (zh) | 2021-12-16 | 2022-03-22 | 安徽中创电子信息材料有限公司 | 一种钛酸钡粉末介电常数的测试方法 |
CN114408915A (zh) * | 2021-12-21 | 2022-04-29 | 惠州市禾腾能源科技有限公司 | 一种高能量密度石墨复合材料及其制备方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103904290B (zh) * | 2012-12-28 | 2016-11-23 | 华为技术有限公司 | 水系锂离子电池复合电极及其制备方法、水系锂离子电池 |
KR20220012024A (ko) * | 2020-07-22 | 2022-02-03 | 에스케이온 주식회사 | 리튬 이차 전지 |
CN112133887A (zh) * | 2020-10-09 | 2020-12-25 | 昆山宝创新能源科技有限公司 | 准固态电池极片及其制备方法和应用 |
-
2022
- 2022-06-24 KR KR1020247011747A patent/KR20240054369A/ko unknown
- 2022-06-24 CN CN202280005863.0A patent/CN116806376B/zh active Active
- 2022-06-24 WO PCT/CN2022/101194 patent/WO2023245639A1/zh active Application Filing
- 2022-06-24 EP EP22947406.9A patent/EP4451363A1/en active Pending
- 2022-06-24 JP JP2024521843A patent/JP2024537572A/ja active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101855756A (zh) * | 2008-12-02 | 2010-10-06 | 科卡姆有限公司 | 用于锂蓄电池的壳核型阳极活性材料及其制备方法以及包含所述材料的锂蓄电池 |
JP2016039114A (ja) * | 2014-08-11 | 2016-03-22 | トヨタ自動車株式会社 | 非水電解質二次電池 |
JP2016134267A (ja) * | 2015-01-19 | 2016-07-25 | トヨタ自動車株式会社 | リチウムイオン二次電池 |
JP2017054615A (ja) * | 2015-09-07 | 2017-03-16 | トヨタ自動車株式会社 | 被覆負極活物質 |
CN110299556A (zh) * | 2018-03-22 | 2019-10-01 | 株式会社东芝 | 电极、二次电池、电池组和车辆 |
CN114217139A (zh) | 2021-12-16 | 2022-03-22 | 安徽中创电子信息材料有限公司 | 一种钛酸钡粉末介电常数的测试方法 |
CN114408915A (zh) * | 2021-12-21 | 2022-04-29 | 惠州市禾腾能源科技有限公司 | 一种高能量密度石墨复合材料及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
EP4451363A1 (en) | 2024-10-23 |
CN116806376A (zh) | 2023-09-26 |
KR20240054369A (ko) | 2024-04-25 |
JP2024537572A (ja) | 2024-10-11 |
CN116806376B (zh) | 2024-09-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN113207316B (zh) | 人造石墨、二次电池、制备方法及装置 | |
JP7461476B2 (ja) | 負極活性材料、その製造方法、二次電池及び二次電池を含む装置 | |
US20240322139A1 (en) | Negative electrode plate, secondary battery, battery module, battery pack, and electrical device | |
JP2023505134A (ja) | 二次電池、当該二次電池を含む電池モジュール、電池パック及び装置 | |
US20230369591A1 (en) | Negative-electrode active material and preparation method thereof, secondary battery, and battery module, battery pack, and apparatus containing such secondary battery | |
CN116799166A (zh) | 负极活性材料及其制备方法和包含其的装置 | |
WO2023123300A1 (zh) | 硬碳及其制备方法、含有其的二次电池及用电装置 | |
WO2023245639A1 (zh) | 快充型负极活性材料及其制备方法、负极极片、二次电池及用电装置 | |
CN114223072B (zh) | 负极活性材料及其制备方法、二次电池和包含二次电池的装置 | |
WO2023124913A1 (zh) | 负极活性材料、其制备方法及其相关的二次电池和装置 | |
WO2023044866A1 (zh) | 硅碳负极材料、负极极片、二次电池、电池模块、电池包和用电装置 | |
CN115838170A (zh) | 改性石墨、制备方法以及包含该改性石墨的二次电池和用电装置 | |
WO2024007159A1 (zh) | 电极组件、二次电池、电池模块、电池包及用电装置 | |
CN115810724B (zh) | 复合石墨材料及其制备方法、负极极片、二次电池 | |
US20230282829A1 (en) | Artificial graphite and prepartion method thereof, negative electrode plate, secondary battery, battery module, battery pack and electrical device | |
WO2023133662A1 (zh) | 改性石墨及其制备方法、碳包覆负极活性材料及其制备方法、负极极片、二次电池、电池模块、电池包及用电装置 | |
WO2024108573A1 (zh) | 碳材料及其制备方法、以及含有其的二次电池和用电装置 |
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: 22947406 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20247011747 Country of ref document: KR Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2024521843 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022947406 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2022947406 Country of ref document: EP Effective date: 20240717 |