CN106654171A - A composite dispersant, lithium ion battery anode slurry, an anode and a lithium ion battery - Google Patents
A composite dispersant, lithium ion battery anode slurry, an anode and a lithium ion battery Download PDFInfo
- Publication number
- CN106654171A CN106654171A CN201510716468.5A CN201510716468A CN106654171A CN 106654171 A CN106654171 A CN 106654171A CN 201510716468 A CN201510716468 A CN 201510716468A CN 106654171 A CN106654171 A CN 106654171A
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- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- negative
- dispersing agent
- agent
- Prior art date
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- Pending
Links
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 134
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 132
- 239000002270 dispersing agent Substances 0.000 title claims abstract description 120
- 239000002131 composite material Substances 0.000 title claims abstract description 100
- 239000006256 anode slurry Substances 0.000 title abstract 2
- 239000002563 ionic surfactant Substances 0.000 claims abstract description 16
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 25
- 230000000694 effects Effects 0.000 claims description 24
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 20
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 12
- 239000006257 cathode slurry Substances 0.000 claims description 10
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 claims description 8
- BTBJBAZGXNKLQC-UHFFFAOYSA-N ammonium lauryl sulfate Chemical compound [NH4+].CCCCCCCCCCCCOS([O-])(=O)=O BTBJBAZGXNKLQC-UHFFFAOYSA-N 0.000 claims description 7
- 229940063953 ammonium lauryl sulfate Drugs 0.000 claims description 7
- -1 polyoxyethylene lauryl ether Polymers 0.000 claims description 7
- 229920005862 polyol Polymers 0.000 claims description 5
- 150000003077 polyols Chemical class 0.000 claims description 5
- IEQAICDLOKRSRL-UHFFFAOYSA-N 2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-(2-dodecoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethanol Chemical compound CCCCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO IEQAICDLOKRSRL-UHFFFAOYSA-N 0.000 claims description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 4
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 4
- 235000011152 sodium sulphate Nutrition 0.000 claims description 4
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 claims description 3
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 claims description 3
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 claims description 3
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 2
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 38
- 239000006258 conductive agent Substances 0.000 abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 20
- 239000011149 active material Substances 0.000 abstract description 10
- 239000002245 particle Substances 0.000 abstract description 7
- 238000005054 agglomeration Methods 0.000 abstract description 2
- 230000002776 aggregation Effects 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 42
- 239000000203 mixture Substances 0.000 description 40
- 239000003792 electrolyte Substances 0.000 description 34
- 230000004888 barrier function Effects 0.000 description 30
- 238000002360 preparation method Methods 0.000 description 30
- 239000004698 Polyethylene Substances 0.000 description 29
- 238000001035 drying Methods 0.000 description 29
- 229920000573 polyethylene Polymers 0.000 description 29
- 229910052782 aluminium Inorganic materials 0.000 description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 28
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 27
- 238000003756 stirring Methods 0.000 description 27
- 239000000463 material Substances 0.000 description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 24
- 229910052744 lithium Inorganic materials 0.000 description 23
- 230000005611 electricity Effects 0.000 description 22
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 19
- 239000004567 concrete Substances 0.000 description 18
- 239000011889 copper foil Substances 0.000 description 18
- 229910002804 graphite Inorganic materials 0.000 description 18
- 239000010439 graphite Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 18
- 239000006185 dispersion Substances 0.000 description 17
- 238000004513 sizing Methods 0.000 description 17
- 239000000126 substance Substances 0.000 description 17
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 16
- 239000002253 acid Substances 0.000 description 16
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 16
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 15
- 239000005030 aluminium foil Substances 0.000 description 15
- 230000008569 process Effects 0.000 description 15
- 230000032683 aging Effects 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 14
- 239000010941 cobalt Substances 0.000 description 14
- 229910017052 cobalt Inorganic materials 0.000 description 14
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 14
- 239000012528 membrane Substances 0.000 description 14
- 239000002985 plastic film Substances 0.000 description 14
- 229920006255 plastic film Polymers 0.000 description 14
- 238000004804 winding Methods 0.000 description 14
- 229910001290 LiPF6 Inorganic materials 0.000 description 13
- 239000003610 charcoal Substances 0.000 description 13
- 238000002513 implantation Methods 0.000 description 13
- 229920003023 plastic Polymers 0.000 description 13
- 239000004033 plastic Substances 0.000 description 13
- 239000011257 shell material Substances 0.000 description 13
- 239000013543 active substance Substances 0.000 description 11
- 239000011230 binding agent Substances 0.000 description 11
- 239000008187 granular material Substances 0.000 description 11
- 239000002904 solvent Substances 0.000 description 9
- 239000007774 positive electrode material Substances 0.000 description 8
- 239000000725 suspension Substances 0.000 description 8
- 239000012071 phase Substances 0.000 description 7
- 239000004094 surface-active agent Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000011258 core-shell material Substances 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 4
- 229920005591 polysilicon Polymers 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 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 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000007773 negative electrode material Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 2
- 229910007981 Si-Mg Inorganic materials 0.000 description 2
- 229910008316 Si—Mg Inorganic materials 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000004087 circulation Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- 229910021389 graphene Inorganic materials 0.000 description 2
- 229910021385 hard carbon Inorganic materials 0.000 description 2
- 150000002466 imines Chemical class 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002048 multi walled nanotube Substances 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 239000002070 nanowire Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 229910021484 silicon-nickel alloy Inorganic materials 0.000 description 2
- 229910021384 soft carbon Inorganic materials 0.000 description 2
- 238000001179 sorption measurement Methods 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 1
- PXFBZOLANLWPMH-UHFFFAOYSA-N 16-Epiaffinine Natural products C1C(C2=CC=CC=C2N2)=C2C(=O)CC2C(=CC)CN(C)C1C2CO PXFBZOLANLWPMH-UHFFFAOYSA-N 0.000 description 1
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- FCAVNEFGGGWYAM-UHFFFAOYSA-N C=CC1=CC=CC=C1.C(=C)=C=CC=C Chemical group C=CC1=CC=CC=C1.C(=C)=C=CC=C FCAVNEFGGGWYAM-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical group O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- VKEQBMCRQDSRET-UHFFFAOYSA-N Methylone Chemical compound CNC(C)C(=O)C1=CC=C2OCOC2=C1 VKEQBMCRQDSRET-UHFFFAOYSA-N 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- JKJWYKGYGWOAHT-UHFFFAOYSA-N bis(prop-2-enyl) carbonate Chemical compound C=CCOC(=O)OCC=C JKJWYKGYGWOAHT-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000002134 carbon nanofiber Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- MOTZDAYCYVMXPC-UHFFFAOYSA-N dodecyl hydrogen sulfate Chemical compound CCCCCCCCCCCCOS(O)(=O)=O MOTZDAYCYVMXPC-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 229940116007 ferrous phosphate Drugs 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910000155 iron(II) phosphate Inorganic materials 0.000 description 1
- SDEKDNPYZOERBP-UHFFFAOYSA-H iron(ii) phosphate Chemical compound [Fe+2].[Fe+2].[Fe+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O SDEKDNPYZOERBP-UHFFFAOYSA-H 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- XQHAGELNRSUUGU-UHFFFAOYSA-M lithium chlorate Chemical compound [Li+].[O-]Cl(=O)=O XQHAGELNRSUUGU-UHFFFAOYSA-M 0.000 description 1
- OVAQODDUFGFVPR-UHFFFAOYSA-N lithium cobalt(2+) dioxido(dioxo)manganese Chemical compound [Li+].[Mn](=O)(=O)([O-])[O-].[Co+2] OVAQODDUFGFVPR-UHFFFAOYSA-N 0.000 description 1
- DEUISMFZZMAAOJ-UHFFFAOYSA-N lithium dihydrogen borate oxalic acid Chemical compound B([O-])(O)O.C(C(=O)O)(=O)O.C(C(=O)O)(=O)O.[Li+] DEUISMFZZMAAOJ-UHFFFAOYSA-N 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 description 1
- PQIOSYKVBBWRRI-UHFFFAOYSA-N methylphosphonyl difluoride Chemical group CP(F)(F)=O PQIOSYKVBBWRRI-UHFFFAOYSA-N 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229910001453 nickel ion Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920005575 poly(amic acid) Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229960004063 propylene glycol Drugs 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 125000000383 tetramethylene group Chemical class [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- H01M4/62—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
- 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
- H01M4/134—Electrodes based on metals, Si or alloys
-
- 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
Abstract
The invention belongs to the technical field of lithium ion batteries, and particularly discloses a composite dispersant, lithium ion battery anode slurry, an anode and a lithium ion battery. The composite dispersant comprises, by mass, 50-90% of a nonionic surfactant and 10-50% of an ionic surfactant. In the composite dispersant consisting of the nonionic surfactant and the ionic surfactant, the nonionic surfactant has hydrophilic groups high in water affinity, the ionic surfactant has hydrophilic groups and lipophilic groups, the ionic surfactant and the nonionic surfactant are synergistic to perform directional alignment on the slurry surface, and repulsive force between an active material and conductive agent particles is enhanced, thus improving stability, uniformity and dispersibility of the lithium ion battery active material and the conductive agent particles so as to prevent collision and agglomeration, and further effectively improving electrochemical properties of the lithium ion battery.
Description
Technical field
The invention belongs to technical field of lithium ion, more particularly to a kind of composite dispersing agent, lithium ion battery
Cathode size, negative pole and lithium ion battery.
Background technology
Secondary lithium battery has big specific capacity, discharge and recharge life-span length, memory-less effect, environmental pollution little
Many advantages, such as, since early 1990s commercialization, NI-G and Ni-MH battery have been substituted soon,
And be widely used in the portable electronics such as mobile phone, notebook computer, video camera.And have to electricity
The trend of the frontiers such as electrical automobile, Aero-Space, energy-accumulating power station development.Compared with traditional 3C digital batteries,
Requirement of these frontiers to lithium ion battery is harsher, especially to the cycle life of battery, energy density,
The concordance of set of cells, safety is put forward higher requirement.
The electrode of lithium ion battery is all by collector, active substance, conductive agent, binding agent, dispersant group
Into.Wherein, typically from the nano-particle for conducting electricity very well, it typically has larger specific surface to conductive agent
The surface energy of product and superelevation, but conductive agent is susceptible to reunite during mixing with active substance, point
Scattered effect is poor, and active substance can directly influence battery capacity performance with the quality of conductive agent dispersion effect
Size and battery consistency quality (battery consistency refer to relate generally to internal resistance concordance consistent with capacity
Property).
For the research worker such as the problems referred to above, scholar, research and development engineer and production firm on the one hand from material knot
Structure design is started with, and such as adopts the property for preparing second particle, carbon coating, doping method to attempt raising battery
Energy；On the other hand improve up from equipment, it is intended to use homogenizer, mulser, planetary ball mill etc. to set
It is standby making active substance and conductive agent be uniformly dispersed.Although above two mode improves to a certain extent electricity
The chemical property in pond, but do not tackle the problem at its root, so effect is not notable.
The raising of battery performance is in fact and the effective dispersion in media as well of active material and conductive agent and activity
Material is relevant with the modification on conductive agent surface, therefore we are necessary to propose a kind of dividing with good dispersion
Powder.
The content of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of composite dispersing agent, to solve
Certainly because negative active core-shell material and conductive agent granule are little, specific surface area is big, surface energy is high, easily with starched
Journey produces spontaneous cohesion so as to cause the problem of coating bad dispersibility.
It is a further object of the invention to provide lithium ion battery negative is starched by made by the composite dispersing agent
Material, negative pole and lithium ion battery.
To achieve the above object of the invention, the embodiment of the present invention employs following technical scheme：
A kind of composite dispersing agent, including the following component of mass percent：
Nonionic surfactant 50%-90%；
Ionic surfactant 10%-50%.
Correspondingly, a kind of lithium ion battery cathode slurry, comprising dispersant, the dispersant is described above
Composite dispersing agent.
Further correspondingly, a kind of lithium ion battery negative, including negative electrode active layer, the negative pole is lived
Property layer is formed by lithium ion battery cathode slurry described above.
And, correspondingly, a kind of lithium ion battery, including lithium ion battery negative, the lithium ion battery
Negative pole is provided by lithium ion battery negative described above.
The above embodiment of the present invention is provided and is made up of nonionic surfactant and ionic surfactant
Composite dispersing agent.Nonionic surfactant has very strong to water affinity in the composite dispersing agent
Hydrophilic group, and ionic surfactant then contains hydrophilic group and lipophilic group simultaneously, both cooperate with work
With, it is oriented arrangement to pulp surface jointly, strengthen active material and the intergranular repulsive force of conductive agent,
It is particle stabilized uniformly dispersed so as to improve lithium ion battery active material and conductive agent, to prevent collision from reuniting.
In the above embodiment of the present invention, prepared for lithium ion battery cathode slurry component by the composite dispersing agent
Lithium ion battery cathode slurry there is high-solid-content and low-viscosity feature, so as to reduce slurry manufacturing process in it is molten
The usage amount of agent, the composite dispersing agent also has improves the scattered effect of active substance, and makes negative electrode active material
Material distribution is homogeneous, stable.
The negative electrode active layer of lithium ion battery negative is formed by above-mentioned lithium ion battery cathode slurry, can effectively be carried
High-lithium ion battery cathode wettability of the surface, thus absorbability of the negative pole to electrolyte is greatly improved.
Lithium ion battery provided in an embodiment of the present invention, the making of negative pole is using provided in an embodiment of the present invention multiple
Dispersant is closed, effectively uniform and stable dispersion can be carried out to negative active core-shell material and conductive agent so that electricity
Solution liquid easily infiltrates active substance, and shortens lithium ion mobility distance, holds so as to improve lithium ion battery
Amount and cycle performance, while reducing the internal resistance of battery, reduce the polarization of battery, overall to improve cell performance
Energy.
Description of the drawings
Technical scheme in order to be illustrated more clearly that the embodiment of the present invention, below will be to wanting needed for embodiment
The accompanying drawing for using is briefly described, it should be apparent that, drawings in the following description are only the one of the present invention
A little embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to these accompanying drawings.
Fig. 1 is the SEM figures of the lithium ion battery negative that the embodiment of the present invention 1 is provided；
Fig. 2 is the SEM figures of the lithium ion battery negative that comparative example of the present invention 1 is provided.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with accompanying drawing and reality
Example is applied, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
Only to explain the present invention, it is not intended to limit the present invention.
The embodiment of the present invention provides a kind of composite dispersing agent, including the following component of mass percent：
Nonionic surfactant 50%-90%；
Ionic surfactant 10%-50%.
Wherein, in any embodiment, nonionic surfactant has stability high, is difficult by forceful electric power
The impact of solution matter, is not easy to be affected, and can be used in mixed way with other types surfactant by acid, alkali,
The compatibility is good, there is good dissolubility in various solvents；There is no strong adsorption on a solid surface,
These characteristics make it not result in the rapid subsidence of slurry, thus, it is easy to make slurry form uniform suspension,
And then improve follow-up Painting effect.Nonionic surfactant is polyoxyethylene-type and polyol type surface
One or two kinds of and two or more mixture in activating agent.
Polyoxyethylene-type surfactant has a large amount of hydrophilic groups-ehter bond (R-O-R '), these hydrophilic groups with
During slurry, can uniformly, densely adsorb on the surface of the granule that specific surface area is big, surface energy is high,
The surface energy of granule is reduced, agglomerate grain is prevented.Preferably, polyoxyethylene-type surface activity
Agent be polyoxyethylene lauryl ether and lauryl alcohol it is therein one or more.
EPE polyol EPE has a number of hydrophilic group-hydroxyl (- OH), as ehter bond,
These hydrophilic groups also can adsorb on the surface of granule during with slurry, reduce surface energy, prevent
Grain is reunited.Preferably, EPE polyol EPE can be ethylene glycol, 1,2-PD,
BDO, 1,6- hexanediol, neopentyl glycol, Diethylene Glycol, dipropylene glycol, a contracting two
One kind in ethylene glycol (also referred to as diethylene glycol or diethylene glycol ether, diethylene glycol), trimethylolpropane and glycerol
Or it is several.
In any embodiment, ionic surfactant has hydrophilic group and lipophilic group, and parent simultaneously
Water base group for ion-type group, by different groups (hydrophilic group and lipophilic group) respectively to it is biphase carry out it is affine,
Make the biphase composition for being regarded as this phase, molecules align between the two phases, makes biphase surface equivalent to turning
Enter intramolecule, so as to reduce surface tension.Due to a biphase component for all being regarded as this phase, with regard to phase
When interface is not all formed in two phases and surfactant molecule, part in this way is equivalent to
The interface of two phases has been eliminated, surface tension and surface free energy has just been reduced；Secondly as ion-type
Surfactant is electrically charged, its absorption on the surface of granule so that make it is mutually exclusive between granule and granule,
Reaching prevents the effect of particle agglomeration.
Ionic surfactant is cationic, anionic or amphoteric surfactant.Preferably,
Ionic surfactant is Brij 35 sodium sulfate, ammonium lauryl sulfate, secondary alkyl
Sodium sulfonate one of which is several.
The composite dispersing agent that the above embodiment of the present invention is provided, using nonionic surfactant and ion-type
Surfactant is respectively 50%-90% according to mass percent and 10%-50% is combined, and both assist jointly
Same-action, improves the dispersion effect to float jointly.
Specifically, in particulate matter or float dispersive process, the composite dispersing agent of addition is in granule
There is adsorption in surface, change particle surface interfacial property, reduce surface tension and surface free energy,
So as to change granule and liquid phase medium, granule and intergranular interaction, superfine powder is set to be dispersed.
Correspondingly, the present invention additionally provides a kind of lithium on the basis of the composite dispersing agent that above-described embodiment is provided
Ion battery negative pole.In one embodiment, the lithium ion battery negative include collector, negative active core-shell material,
Conductive agent, binding agent and dispersant.
It is first by above-mentioned negative electrode active material for lithium ion battery negative provided in an embodiment of the present invention
Material, conductive agent, binding agent and dispersant and solvent are mixed to form by a certain percentage cathode size, are then coated with
In collection liquid surface, through drying, roll process and obtain.
In any embodiment, the dispersant, namely composite dispersing agent provided in an embodiment of the present invention accounts for negative
The 0%-1.5% of pole slurry gross mass, so advantageously reduces the usage amount of dispersant, and work is improve indirectly
Property material solid content.To the lithium-ion electric prepared for component by composite dispersing agent provided in an embodiment of the present invention
Pond negative pole carries out SEM scannings, scanning result as shown in Fig. 2 can see under scanning electron microscope,
Active substance is in homogeneously dispersed state in collector, without leakage paper tinsel phenomenon.
Wherein, in any embodiment, the collector of lithium ion battery negative provided in an embodiment of the present invention is excellent
Select Copper Foil.Copper Foil not only has good mechanical strength and good electric conductivity, and Li+Under electronegative potential
Copper Foil can not be made into embedding lithium alloy, i.e., dissolve can not Copper Foil, be preferable lithium ion battery negative collector,
It is not easy damaged or spillage occur, and plays good electric action.It is further preferable that copper thickness is
5 μm -18 μm, the Copper Foil average weight of the thickness, thickness is uniform, and each position potential is uniform, it is often more important that,
Be conducive to mitigating the weight of battery, improve the proportion shared by active substance.
In any embodiment, the negative active core-shell material of lithium ion battery negative is selected from native graphite, artificial stone
Ink, surface modified natural graphite, hard carbon, soft carbon, carbonaceous mesophase spherules, polysilicon nanowire, polysilicon
In the sub- silicon micron particle of nano-particle, Si-Mg alloy, silicon nickel alloy, Antaciron powder and oxidation at least
It is a kind of.Wherein graphite, hard carbon, soft carbon, carbonaceous mesophase spherules have good conductivity, and current potential during embedding lithium is low,
The current potential of close lithium metal, so that the output voltage of battery is high, it is using most lithium-ion negative pole activity
Material.And polysilicon nanowire, polysilicon nanometer granule, Si-Mg alloy, silicon nickel alloy, ferro-silicon alloy powder
Although than carbon-based high, poorly conductive, volume serious the current potential of the embedding de- lithium in end occurs in charge and discharge process
Expansion, but it has high theoretical specific capacity, and Jing is widely studied, and is current most promising negative pole
Active material.
In any embodiment, the preferred conductive black of conductive agent of lithium ion battery negative, electrically conductive graphite, gas
At least one in phase grown carbon fiber, multi-walled carbon nano-tubes, SWCN and Graphene.These are led
Electric agent is respectively provided with larger specific surface area, and electric conductivity is good, is dispersed in lithium ion battery negative
In material, be conducive to ensureing that each trickle position electric conductivity is consistent as far as possible, reduce because local is conductive uneven
Resistance increase phenomenon being likely to occur etc..
In any embodiment, the binding agent of lithium ion battery negative is selected from vinylidene, butadiene-styrene rubber, gathers
Vinyl alcohol, polyethylene glycol oxide, polyacrylic acid, polymethyl methacrylate, polyacrylamide, polyamic acid,
At least one of polyimides, polyamidoimide and sodium alginate.The binding agent heat stability of these types
Can be good, side reaction can not be occurred with electrolyte by organic electrolyte moistening, active material can be made
Effectively bond with collector, and be conducive to negative active core-shell material surface to form SEI films.Therefore, it can make
For the binding agent of lithium ion battery negative.
In any embodiment, the dispersant of the lithium ion battery negative is provided by above-mentioned composite dispersing agent.
In any embodiment, the solvent used in the cathode size manufacturing process of lithium ion battery negative is
One or more in deionized water, N-Methyl pyrrolidone, alcohols or ethers.This type nontoxic solvent or
Person's small toxicity, adds in slurry makes, and contributes to the uniform mixing of slurry each component, and is easy to volatilization,
After cathode size coating is dried, the weight of negative pole is not accounted for.
Lithium ion battery negative, composite dispersing agent pair are made using composite dispersing agent provided in an embodiment of the present invention
The dispersion effect of material is substantially good than nonionic surfactant or ionic surfactant is used alone,
And other composite dispersing agents are compared, the composite dispersing agent has the advantage that：(1) adding method is simple, nothing
Original battery preparation technique and equipment need to be changed；(2) dispersion effect is good, to conductive agent, active material
Splendid dispersion effect can be reached, shortens the jitter time of above-mentioned active material, improve negative pole each component
Dispersibility, it is to avoid leakage paper tinsel occur causes and lithium ion battery negative performance is bad；(3) dispersant is reduced
Usage amount, improves the solid content of negative electrode active material indirectly, is equally beneficial for improving lithium ion battery negative
Performance；(4) applied range, either water-based system or oil-based solvent gonosome system are suitable for.
Correspondingly, the embodiment of the present invention is gone back on the basis of composite dispersing agent and lithium ion battery negative is provided
Further provide a kind of lithium ion battery.In one embodiment, the lithium ion battery includes positive pole, bears
Pole, barrier film, electrolyte and battery case.
In any embodiment, the positive pole of lithium ion battery includes plus plate current-collecting body and is coated in plus plate current-collecting body
The positive electrode on surface.
Wherein, the plus plate current-collecting body is selected from aluminum or the one of which being coated with the aluminium foil of conductive carbon.
The positive electrode is mixed by positive electrode active materials, binding agent, conductive agent.The positive-active
Material is selected from cobalt acid lithium, LiMn2O4, nickel ion doped, nickle cobalt lithium manganate, nickel cobalt lithium aluminate and ferrous phosphate
At least one in lithium, but cited positive electrode active materials are not limited to, and the positive active material is in institute
It is 90%～99% to state the weight/mass percentage composition in positive electrode active materials.Binding agent in positive electrode is selected from poly- inclined
Fluorothene, and weight/mass percentage composition of the binding agent in the positive electrode active materials is 0.5%～5%.Just
Conductive agent in the material of pole selected from conductive black, electrically conductive graphite, vapor-grown carbon fibers, multi-walled carbon nano-tubes,
At least one in SWCN and Graphene, but it is not limited to cited conductive agent, and the conduction
Weight/mass percentage composition of the agent in the positive electrode active materials is 0.5%～5%.
Specifically, a kind of preparation method of above-mentioned lithium ion anode is：By positive active material, binding agent,
, according to certain ratio, Jing high-speed stirred obtains being uniformly dispersed and makes anode sizing agent for conductive black and solvent.Will
The anode sizing agent is equably coated in aluminium foil two sides, is compacted through drying, roll squeezer, is obtaining lithium ion battery just
Pole.Wherein, the solvent employed in lithium ion battery anode glue size be deionized water, N-Methyl pyrrolidone,
One or more in alcohols or ethers.
In any embodiment, the composite dispersing agent that the negative pole of lithium ion battery is provided by above-described embodiment with it is negative
Pole active material, conductive agent, binding agent and solvent are mixed into cathode size and are then coated with collection liquid surface simultaneously
Through drying, roll and obtain；Or be directed to above-described embodiment offer lithium ion battery negative.
In any embodiment, the barrier film of lithium ion battery is by polypropylene-polyethylene composite isolated film, polypropylene
Any one offer in isolating membrane or polyethylene separators, but it is not limited to cited barrier film.This types of diaphragms
With good wettability, porosity, breathability, tensile strength, pyrocondensation performance, thermal stability, from
Close performance and puncture resistance, and do not react with electrolyte, be presently the most conventional lithium ion battery
Barrier film.In any embodiment, the electrolyte of electrolyte is selected from lithium hexafluoro phosphate, LiBF4, height
Lithium chlorate, double (fluorine sulphonyl) imine lithiums, double (trimethyl fluoride sulfonyl) imine lithiums, di-oxalate lithium borate and difluoro grass
At least one in sour Lithium biborate；The solvent of the electrolyte is selected from ethylene carbonate, Allyl carbonate, carbon
At least one in sour butene esters, dimethyl carbonate, diethyl carbonate, Ethyl methyl carbonate and methyl propyl carbonate.
In one embodiment, the main process for preparing of above-mentioned lithium ion battery is：Distinguish in positive pole and negative pole
The conductive lug of welding, polypropylene-polyethylene composite isolated film is placed in the middle of positive pole and negative pole, and winding forms naked
Battery core, in being wrapped in aluminum plastic film, injects electrolyte；After being packaged to battery carry out chemical conversion and it is aging, obtain
To flexible-packed battery.
The lithium ion battery that above-described embodiment is provided, with good concordance, capacity is high, capability retention
It is good, good rate capability.
In order to better illustrate composite dispersing agent provided in an embodiment of the present invention, lithium ion battery negative and lithium from
Sub- battery, is illustrated below by multiple embodiments.
Embodiment 1
A kind of composite dispersing agent, is 3 according to mass ratio by ethylene glycol and ammonium lauryl sulfate：1 mix homogeneously
Form.
A kind of lithium ion battery negative, dispersant used is enforcement in the lithium ion battery negative preparation process
The composite dispersing agent that example 1 is provided.Its concrete preparation method is as follows：
It is native graphite according to mass ratio：The composite dispersing agent of embodiment 1：CMC (carboxymethyl cellulose, under
Together)：Conductive black：Water=100:0.25:0.05:0.25:120 ratios mix, the high-speed stirring under the power of 50Hz
60min is mixed, then again power 30Hz is adjusted to, continues to stir 120min, obtain finely dispersed negative pole slurry
Material, will obtain cathode size and is equably coated in 9 μm of Copper Foil two sides, be compacted through drying, roll squeezer, obtain
Negative plate.
A kind of lithium ion battery, including positive plate, embodiment 1 provide negative plate, barrier film, electrolyte and
Aluminum plastic membrane shell.
Its positive plate is prepared as follows：It is cobalt acid lithium according to mass ratio：Kynoar：Conductive charcoal
It is black：N-Methyl pyrrolidone=95:2.5:2.5:30 ratios mix, high-speed stirred 60min under the power of 50Hz,
Then again power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed anode sizing agent；By this just
Pole slurry is equably coated in 16 μm of aluminium foil two sides, is compacted through drying, roll squeezer, obtains positive plate.
Barrier film adopts 16 μm of polypropylene-polyethylene composite isolated film.
Process prepared by the lithium ion battery assembling：Weld on prepared positive plate and negative plate conductive
Lug, polypropylene-polyethylene composite isolated film is positioned in the middle of positive plate and negative plate, and winding forms naked electricity
Core, in being wrapped in aluminum plastic film；Implantation concentration is 1mol/L LiPF6/ (EC+DEC+DMC) (EC:DEC:DMC
Weight ratio is 1:1:1) electrolyte.After being packaged to battery carry out chemical conversion and it is aging, obtain flexible packaged battery
Pond, is C1 by the battery mark.
Embodiment 2
A kind of composite dispersing agent dispersant, by glycerol and SAS according to mass ratio 5：5 mixing is equal
It is even to form.
A kind of lithium ion battery negative, dispersant used is enforcement in the lithium ion battery negative preparation process
The composite dispersing agent that example 2 is provided.Its concrete preparation method is as follows：
It is native graphite according to mass ratio：The composite dispersing agent of embodiment 2：CMC：Conductive black：Water
=100:0.25:0.05:0.25:120 ratios mix, high-speed stirred 60min under the power of 50Hz, Ran Houzai
Power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed cathode size, negative pole slurry will be obtained
Material is equably coated in 9 μm of Copper Foil two sides, is compacted through drying, roll squeezer, obtains negative plate.
A kind of lithium ion battery, including positive plate, embodiment 2 provide negative plate, barrier film, electrolyte and
Aluminum plastic membrane shell.
Its positive plate is prepared as follows：It is cobalt acid lithium according to mass ratio：Kynoar：Conductive charcoal
It is black：N-Methyl pyrrolidone=95:2.5:2.5:30 ratios mix, high-speed stirred 60min under the power of 50Hz,
Then again power is adjusted to 30HZ, continues to stir 120min, obtain finely dispersed anode sizing agent；Should
Anode sizing agent is equably coated in 16 μm of aluminium foil two sides, is compacted through drying, roll squeezer, obtains positive plate.
Barrier film adopts 16 μm of polypropylene-polyethylene composite isolated film.
Process prepared by the lithium ion battery assembling：Weld on prepared positive plate and negative plate conductive
Lug, polypropylene-polyethylene composite isolated film is positioned in the middle of positive plate and negative plate, and winding forms naked electricity
Core, in being wrapped in aluminum plastic film.Implantation concentration is 1mol/L LiPF6/ (EC+DEC+DMC) (EC:DEC:DMC
Weight ratio is 1:1:1) electrolyte.After being packaged to battery carry out chemical conversion and it is aging, obtain flexible packaged battery
Pond, is C2 by the battery mark.
Embodiment 3
A kind of composite dispersing agent, by polyoxyethylene lauryl ether：Ammonium lauryl sulfate is according to mass ratio
5：5 mix homogeneously are formed.
A kind of lithium ion battery negative, dispersant used is enforcement in the lithium ion battery negative preparation process
The composite dispersing agent that example 3 is provided.Its concrete preparation method is as follows：
It is native graphite according to mass ratio：The composite dispersing agent of embodiment 3：CMC：Conductive black：Water
=100:0.25:0.05:0.25:120 ratios mix, high-speed stirred 60min under the power of 50Hz, Ran Houzai
Power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed cathode size, negative pole slurry will be obtained
Material is equably coated in 9 μm of Copper Foil two sides, is compacted through drying, roll squeezer, obtains negative plate.
A kind of lithium ion battery, including positive plate, embodiment 3 provide negative plate, barrier film, electrolyte and
Aluminum plastic membrane shell.
Its positive plate is prepared as follows：It is cobalt acid lithium according to mass ratio：Kynoar：Conductive charcoal
It is black：N-Methyl pyrrolidone=95:2.5:2.5:30 ratio mixing, the high-speed stirred under the power of 50Hz
60min, then power is adjusted to 30Hz again, continues to stir 120min, obtains finely dispersed anode sizing agent；
The anode sizing agent is equably coated in into 16 μm of aluminium foil two sides, is compacted through drying, roll squeezer, obtain positive pole
Piece.
Barrier film adopts 16 μm of polypropylene-polyethylene composite isolated film.
The assembling preparation process of the lithium ion battery：Weld on prepared positive plate and negative plate conductive
Lug, polypropylene-polyethylene composite isolated film is positioned in the middle of positive plate and negative plate, and winding forms naked electricity
Core, in being wrapped in aluminum plastic film.Implantation concentration is 1mol/L LiPF6/ (EC+DEC+DMC) (EC:DEC:DMC
Weight ratio is 1:1:1) electrolyte.After being packaged to battery carry out chemical conversion and it is aging, obtain flexible packaged battery
Pond, is C3 by the battery mark.
Embodiment 4
A kind of composite dispersing agent, by polyoxyethylene lauryl ether：Diglycol：Lauryl sulphate acid
Ammonium is according to mass ratio 3:3:4 ratio mix homogeneously is formed.
A kind of lithium ion battery negative, dispersant used is enforcement in the lithium ion battery negative preparation process
The composite dispersing agent that example 4 is provided.Its concrete preparation method is as follows：
It is by native graphite according to mass ratio：The composite dispersing agent of embodiment 4：CMC：Conductive black：Water
=100:0.25:0.05:0.25:120 ratios mix, high-speed stirred 60min under the power of 50Hz, Ran Houzai
Power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed cathode size, negative pole slurry will be obtained
Material is equably coated in 9 μm of Copper Foil two sides, is compacted through drying, roll squeezer, obtains negative plate.
A kind of lithium ion battery, including positive plate, embodiment 4 provide negative plate, barrier film, electrolyte and
Aluminum plastic membrane shell.
Its positive plate is prepared as follows：It is cobalt acid lithium according to mass ratio:Kynoar:Conductive charcoal
It is black:N-Methyl pyrrolidone=95:2.5:2.5:30 ratios mix, high-speed stirred 60min under the power of 50Hz,
Then again power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed anode sizing agent；By this just
Pole slurry is equably coated in 16 μm of aluminium foil two sides, is compacted through drying, roll squeezer, obtains positive plate.
Barrier film adopts 16 μm of polypropylene-polyethylene composite isolated film.
Process prepared by the lithium ion battery assembling：Weld on prepared positive plate and negative plate conductive
Lug, polypropylene-polyethylene composite isolated film is positioned in the middle of positive plate and negative plate, and winding forms naked electricity
Core, in being wrapped in aluminum plastic film.Implantation concentration is 1mol/L LiPF6/ (EC+DEC+DMC) (EC:DEC:DMC
Weight ratio is 1:1:1) electrolyte.After being packaged to battery carry out chemical conversion and it is aging, obtain flexible packaged battery
Pond, is C4 by the battery mark.
Embodiment 5
A kind of composite dispersing agent, by lauryl alcohol：Dipropylene glycol：Ammonium lauryl sulfate is according to mass ratio
4.5:4.5:1 mix homogeneously is formed.
A kind of lithium ion battery negative, dispersant used is enforcement in the lithium ion battery negative preparation process
The composite dispersing agent that example 5 is provided.Its concrete preparation method is as follows：
It is native graphite according to mass ratio：The composite dispersing agent of embodiment 5：CMC：Conductive black：Water
=100:0.25:0.05:0.25:120 ratios mix, high-speed stirred 60min under the power of 50Hz, Ran Houzai
Power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed cathode size, negative pole slurry will be obtained
Material is equably coated in 9 μm of Copper Foil two sides, is compacted through drying, roll squeezer, obtains negative plate.
A kind of lithium ion battery, including positive plate, embodiment 5 provide negative plate, barrier film, electrolyte and
Aluminum plastic membrane shell.
Its positive plate is prepared as follows：It is cobalt acid lithium according to mass ratio：Kynoar：Conductive charcoal
It is black：N-Methyl pyrrolidone=95:2.5:2.5:30 ratios mix, high-speed stirred 60min under the power of 50Hz,
Then again power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed anode sizing agent.By this just
Pole slurry is equably coated in 16 μm of aluminium foil two sides, is compacted through drying, roll squeezer, obtains positive plate.
Barrier film adopts 16 μm of polypropylene-polyethylene composite isolated film.
Process prepared by the lithium ion battery assembling：Weld on prepared positive plate and negative plate conductive
Lug, polypropylene-polyethylene composite isolated film is positioned in the middle of positive plate and negative plate, and winding forms naked electricity
Core, in being wrapped in aluminum plastic film.Implantation concentration is 1mol/L LiPF6/ (EC+DEC+DMC) (EC:DEC:DMC
Weight ratio is 1:1:1) electrolyte.After being packaged to battery carry out chemical conversion and it is aging, obtain flexible packaged battery
Pond, is C5 by the battery mark.
Embodiment 6
A kind of composite dispersing agent, by neopentyl glycol：Polyoxyethylene lauryl ether：Ammonium lauryl sulfate is pressed
According to mass ratio 2.5:2.5:5 mix homogeneously are formed.
A kind of lithium ion battery negative, dispersant used is enforcement in the lithium ion battery negative preparation process
The composite dispersing agent that example 6 is provided.Its concrete preparation method is as follows：
It is native graphite according to mass ratio：The composite dispersing agent of embodiment 6：CMC：Conductive black：Water
=100:0.25:0.05:0.25:120 ratios mix, high-speed stirred 60min under the power of 50Hz, Ran Houzai
Power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed cathode size, negative pole slurry will be obtained
Material is equably coated in 9 μm of Copper Foil two sides, is compacted through drying, roll squeezer, obtains negative plate.
A kind of lithium ion battery, including positive plate, embodiment 6 provide negative plate, barrier film, electrolyte and
Aluminum plastic membrane shell.
Its positive plate is prepared as follows：It is cobalt acid lithium according to mass ratio：Kynoar：Conductive charcoal
It is black：N-Methyl pyrrolidone=95:2.5:2.5:30 ratios mix, high-speed stirred 60min under the power of 50Hz,
Then again power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed anode sizing agent；By this just
Pole slurry is equably coated in 16 μm of aluminium foil two sides, is compacted through drying, roll squeezer, obtains positive plate.
Barrier film adopts 16 μm of polypropylene-polyethylene composite isolated film.
Process prepared by the lithium ion battery assembling：Weld on prepared positive plate and negative plate conductive
Lug, polypropylene-polyethylene composite isolated film is positioned in the middle of positive plate and negative plate, and winding forms naked electricity
Core, in being wrapped in aluminum plastic film；Implantation concentration is 1mol/L LiPF6/ (EC+DEC+DMC) (EC:DEC:DMC
Weight ratio is 1:1:1) electrolyte.After being packaged to battery carry out chemical conversion and it is aging, obtain flexible packaged battery
Pond, is C6 by the battery mark.
Embodiment 7
A kind of composite dispersing agent, by trimethylolpropane：Polyoxyethylene lauryl ether：SAS
According to mass ratio 2.5:2.5:5 mix homogeneously are formed.
A kind of lithium ion battery negative, dispersant used is enforcement in the lithium ion battery negative preparation process
The composite dispersing agent that example 7 is provided.Its concrete preparation method is as follows：
It is native graphite according to mass ratio：The composite dispersing agent of embodiment 7：CMC：Conductive black：Water
=100:0.25:0.05:0.25:120 ratios mix, high-speed stirred 60min under the power of 50Hz, Ran Houzai
Power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed cathode size, negative pole slurry will be obtained
Material is equably coated in 9 μm of Copper Foil two sides, is compacted through drying, roll squeezer, obtains negative plate.
A kind of lithium ion battery, including positive plate, embodiment 7 provide negative plate, barrier film, electrolyte and
Aluminum plastic membrane shell.
Its positive plate is prepared as follows：It is cobalt acid lithium according to mass ratio：Kynoar：Conductive charcoal
It is black：N-Methyl pyrrolidone=95:2.5:2.5:30 ratios mix, high-speed stirred 60min under the power of 50Hz,
Then again power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed anode sizing agent；By this just
Pole slurry is equably coated in 16 μm of aluminium foil two sides, is compacted through drying, roll squeezer, obtains positive plate.
Barrier film adopts 16 μm of polypropylene-polyethylene composite isolated film.
Process prepared by the lithium ion battery assembling：Weld on prepared positive plate and negative plate conductive
Lug, polypropylene-polyethylene composite isolated film is positioned in the middle of positive plate and negative plate, and winding forms naked electricity
Core, in being wrapped in aluminum plastic film；Implantation concentration is 1mol/L LiPF6/ (EC+DEC+DMC) (EC:DEC:DMC
Weight ratio is 1:1:1) electrolyte.After being packaged to battery carry out chemical conversion and it is aging, obtain flexible packaged battery
Pond, is C7 by the battery mark.
Embodiment 8
A kind of composite dispersing agent, by 1,2-PD：Brij 35 sodium sulfate：Secondary alkyl
Sodium sulfonate is according to mass ratio 4.5:4.5:1 mix homogeneously is formed.
A kind of lithium ion battery negative, dispersant used is enforcement in the lithium ion battery negative preparation process
The composite dispersing agent that example 8 is provided.Its concrete preparation method is as follows：
It is native graphite according to mass ratio：The composite dispersing agent of embodiment 8：CMC：Conductive black：Water
=100:0.25:0.05:0.25:120 ratios mix, high-speed stirred 60min under the power of 50Hz, Ran Houzai
Power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed cathode size, negative pole slurry will be obtained
Material is equably coated in 9 μm of Copper Foil two sides, is compacted through drying, roll squeezer, obtains negative plate.
A kind of lithium ion battery, including positive plate, embodiment 8 provide negative plate, barrier film, electrolyte and
Aluminum plastic membrane shell.
Its positive plate is prepared as follows：It is cobalt acid lithium according to mass ratio：Kynoar：Conductive charcoal
It is black：N-Methyl pyrrolidone=95:2.5:2.5:30 ratios mix, high-speed stirred 60min under the power of 50Hz,
Then again power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed anode sizing agent；By this just
Pole slurry is equably coated in 16 μm of aluminium foil two sides, is compacted through drying, roll squeezer, obtains positive plate.
Barrier film adopts 16 μm of polypropylene-polyethylene composite isolated film.
Process prepared by the lithium ion battery assembling：Weld on prepared positive plate and negative plate conductive
Lug, polypropylene-polyethylene composite isolated film is positioned in the middle of positive plate and negative plate, and winding forms naked electricity
Core, in being wrapped in aluminum plastic film；Implantation concentration is 1mol/L LiPF6/ (EC+DEC+DMC) (EC:DEC:DMC
Weight ratio is 1:1:1) electrolyte.After being packaged to battery carry out chemical conversion and it is aging, obtain flexible packaged battery
Pond, is C8 by the battery mark.
Comparative example 1
The dispersant that this comparative example 1 is adopted is for ammonium lauryl sulfate.
A kind of lithium ion battery negative, dispersant used is contrast in the lithium ion battery negative preparation process
The dispersant of example 1.Its concrete preparation method is as follows：
It is native graphite according to mass ratio：The dispersant of comparative example 1：CMC (carboxymethyl cellulose, similarly hereinafter)：
Conductive black：Water=100:0.25:0.05:0.25:120 ratios mix, the high-speed stirred under the power of 50Hz
60min, then power is adjusted to 30Hz again, continues to stir 120min, obtains finely dispersed cathode size,
Cathode size will be obtained and be equably coated in 9 μm of Copper Foil two sides, be compacted through drying, roll squeezer, obtain negative pole
Piece.
A kind of lithium ion battery, including positive plate, comparative example 1 provide negative plate, barrier film, electrolyte and
Aluminum plastic membrane shell.
Its positive plate is prepared as follows：It is cobalt acid lithium according to mass ratio：Kynoar：Conductive charcoal
It is black：N-Methyl pyrrolidone=95:2.5:2.5:30 ratios mix, high-speed stirred 60min under the power of 50Hz,
Then again power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed anode sizing agent；By this just
Pole slurry is equably coated in 16 μm of aluminium foil two sides, is compacted through drying, roll squeezer, obtains positive plate.
Barrier film adopts 16 μm of polypropylene-polyethylene composite isolated film.
Process prepared by the lithium ion battery assembling：Weld on prepared positive plate and negative plate conductive
Lug, polypropylene-polyethylene composite isolated film is positioned in the middle of positive plate and negative plate, and winding forms naked electricity
Core, in being wrapped in aluminum plastic film；Implantation concentration is 1mol/L LiPF6/ (EC+DEC+DMC) (EC:DEC:DMC
Weight ratio is 1:1:1) electrolyte.After being packaged to battery carry out chemical conversion and it is aging, obtain flexible packaged battery
Pond, is C9 by the battery mark.
Comparative example 2
The dispersant that this comparative example 2 is adopted is for glycerol.
A kind of lithium ion battery negative, dispersant used is contrast in the lithium ion battery negative preparation process
The dispersant of example 2.Its concrete preparation method is as follows：
It is native graphite according to mass ratio：The dispersant of comparative example 2：CMC：Conductive black：Water
=100:0.25:0.05:0.25:120 ratios mix, high-speed stirred 60min under the power of 50Hz, Ran Houzai
Power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed cathode size, negative pole slurry will be obtained
Material is equably coated in 9 μm of Copper Foil two sides, is compacted through drying, roll squeezer, obtains negative plate.
A kind of lithium ion battery, including positive plate, comparative example 2 provide negative plate, barrier film, electrolyte and
Aluminum plastic membrane shell.
Its positive plate is prepared as follows：It is cobalt acid lithium according to mass ratio：Kynoar：Conductive charcoal
It is black：N-Methyl pyrrolidone=95:2.5:2.5:30 ratios mix, high-speed stirred 60min under the power of 50Hz,
Then again power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed anode sizing agent；By this just
Pole slurry is equably coated in 16 μm of aluminium foil two sides, is compacted through drying, roll squeezer, obtains positive plate.
Barrier film adopts 16 μm of polypropylene-polyethylene composite isolated film.
Process prepared by the lithium ion battery assembling：Weld on prepared positive plate and negative plate conductive
Lug, polypropylene-polyethylene composite isolated film is positioned in the middle of positive plate and negative plate, and winding forms naked electricity
Core, in being wrapped in aluminum plastic film；Implantation concentration is 1mol/L LiPF6/ (EC+DEC+DMC) (EC:DEC:DMC
Weight ratio is 1:1:1) electrolyte.After being packaged to battery carry out chemical conversion and it is aging, obtain flexible packaged battery
Pond, is C10 by the battery mark.
Comparative example 3
The dispersant that this comparative example 3 is adopted is for polyoxyethylene lauryl ether
A kind of lithium ion battery negative, dispersant used is contrast in the lithium ion battery negative preparation process
The dispersant of example 3.Its concrete preparation method is as follows：
It is native graphite according to mass ratio：The dispersant of comparative example 3：CMC：Conductive black：Water
=100:0.25:0.05:0.25:120 ratios mix, high-speed stirred 60min under the power of 50Hz, Ran Houzai
Power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed cathode size, negative pole slurry will be obtained
Material is equably coated in 9 μm of Copper Foil two sides, is compacted through drying, roll squeezer, obtains negative plate.
A kind of lithium ion battery, including positive plate, comparative example 3 provide negative plate, barrier film, electrolyte and
Aluminum plastic membrane shell.
Its positive plate is prepared as follows：It is cobalt acid lithium according to mass ratio：Kynoar：Conductive charcoal
It is black：N-Methyl pyrrolidone=95:2.5:2.5:30 ratios mix, high-speed stirred 60min under the power of 50Hz,
Then again power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed anode sizing agent；By this just
Pole slurry is equably coated in 16 μm of aluminium foil two sides, is compacted through drying, roll squeezer, obtains positive plate.
Barrier film adopts 16 μm of polypropylene-polyethylene composite isolated film.
Process prepared by the lithium ion battery assembling：Weld on prepared positive plate and negative plate conductive
Lug, polypropylene-polyethylene composite isolated film is positioned in the middle of positive plate and negative plate, and winding forms naked electricity
Core, in being wrapped in aluminum plastic film；Implantation concentration is 1mol/L LiPF6/ (EC+DEC+DMC) (EC:DEC:DMC
Weight ratio is 1:1:1) electrolyte.After being packaged to battery carry out chemical conversion and it is aging, obtain flexible packaged battery
Pond, is C11 by the battery mark.
Comparative example 4
The dispersant that this comparative example 4 is adopted is for trimethylolpropane：Polyoxyethylene lauryl ether：Secondary alkyl
Sodium sulfonate is according to mass ratio 2:2:6 ratio mix homogeneously is formed.
A kind of lithium ion battery negative, dispersant used is contrast in the lithium ion battery negative preparation process
The dispersant of example 4.Its concrete preparation method is as follows：
It is native graphite according to mass ratio：The dispersant of comparative example 4：CMC：Conductive black：Water
=100:0.25:0.05:0.25:120 ratios mix, high-speed stirred 60min under the power of 50Hz, Ran Houzai
Power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed cathode size, negative pole slurry will be obtained
Material is equably coated in 9 μm of Copper Foil two sides, is compacted through drying, roll squeezer, obtains negative plate.
A kind of lithium ion battery, including positive plate, comparative example 4 provide negative plate, barrier film, electrolyte and
Aluminum plastic membrane shell.
Its positive plate is prepared as follows：It is cobalt acid lithium according to mass ratio：Kynoar：Conductive charcoal
It is black：N-Methyl pyrrolidone=95:2.5:2.5:30 ratios mix, high-speed stirred 60min under the power of 50Hz,
Then again power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed anode sizing agent；By this just
Pole slurry is equably coated in 16 μm of aluminium foil two sides, is compacted through drying, roll squeezer, obtains positive plate.
Barrier film adopts 16 μm of polypropylene-polyethylene composite isolated film.
Process prepared by the lithium ion battery assembling：Weld on prepared positive plate and negative plate conductive
Lug, polypropylene-polyethylene composite isolated film is positioned in the middle of positive plate and negative plate, and winding forms naked electricity
Core, in being wrapped in aluminum plastic film；Implantation concentration is 1mol/L LiPF6/ (EC+DEC+DMC) (EC:DEC:DMC
Weight ratio is 1:1:1) electrolyte.After being packaged to battery carry out chemical conversion and it is aging, obtain flexible packaged battery
Pond, is C12 by the battery mark.
Comparative example 5
The dispersant that this comparative example 5 is adopted is 1,2- Propylene Glycol：Brij 35 sodium sulfate：
SAS is according to mass ratio 4.5:5:0.5 mix homogeneously is formed.
A kind of lithium ion battery negative, dispersant used is contrast in the lithium ion battery negative preparation process
The dispersant of example 5.Its concrete preparation method is as follows：
It is native graphite according to mass ratio：The dispersant of comparative example 5：CMC：Conductive black：Water
=100:0.25:0.05:0.25:120 ratios mix, high-speed stirred 60min under the power of 50Hz, Ran Houzai
Power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed cathode size, negative pole slurry will be obtained
Material is equably coated in 9 μm of Copper Foil two sides, is compacted through drying, roll squeezer, obtains negative plate.
A kind of lithium ion battery, including positive plate, comparative example 5 provide negative plate, barrier film, electrolyte and
Aluminum plastic membrane shell.
Its positive plate is prepared as follows：It is cobalt acid lithium according to mass ratio：Kynoar：Conductive charcoal
It is black：N-Methyl pyrrolidone=95:2.5:2.5:30 ratios mix, high-speed stirred 60min under the power of 50Hz,
Then again power is adjusted to 30Hz, continues to stir 120min, obtain finely dispersed anode sizing agent；By this just
Pole slurry is equably coated in 16 μm of aluminium foil two sides, is compacted through drying, roll squeezer, obtains positive plate.
Barrier film adopts 16 μm of polypropylene-polyethylene composite isolated film.
Process prepared by the lithium ion battery assembling：Weld on prepared positive plate and negative plate conductive
Lug, polypropylene-polyethylene composite isolated film is positioned in the middle of positive plate and negative plate, and winding forms naked electricity
Core, in being wrapped in aluminum plastic film；Implantation concentration is 1mol/L LiPF6/ (EC+DEC+DMC) (EC:DEC:DMC
Weight ratio is 1:1:1) electrolyte.After being packaged to battery carry out chemical conversion and it is aging, obtain flexible packaged battery
Pond, is C13 by the battery mark.
In order to verify composite dispersing agent provided in an embodiment of the present invention dispersibility and to lithium ion battery negative starch
The impact of material viscosity, the dispersant prepared respectively to embodiment 1～8 and comparative example 1～5 is according to dispersant：My god
Right graphite：CMC：Conductive black：Water=100:0.25:0.05:0.25:120 ratios mix, in the work(of 50Hz
High-speed stirred 60min under rate, then power is adjusted to 30Hz again, continues to stir 120min, obtains dispersion good
Good suspension, the suspension of acquisition is placed at normal temperatures, observes the time of suspension sedimentation, such as table 1
It is shown.
As it can be seen from table 1 substantially excellent using the dispersion effect of composite dispersing agent provided in an embodiment of the present invention
The dispersion effect of the dispersant used in corresponding comparative example.
Wherein, suspension prepared by the composite dispersing agent that embodiment 1 is provided is placed at normal temperatures 5 talentes and is occurred
Precipitation, slurry viscosity is 2890mPa.s, and prepared by the composite dispersing agent that corresponding comparative example 1 is provided
Suspension is only placed 1 day and occurs as soon as precipitation, and slurry viscosity is up to 4680mPa.s；
Suspension prepared by the composite dispersing agent that embodiment 8 is provided places at normal temperatures 4 talentes and precipitation occurs,
Slurry viscosity is 3080mPa.s, and suspension prepared by the composite dispersing agent that corresponding comparative example 5 is provided is only
Precipitation was occurred as soon as at 2 days, and slurry viscosity is up to 4670mPa.s.
It can be seen from the analysis result of table 1, composite dispersing agent provided in an embodiment of the present invention can be obviously improved slurry
The dispersion effect of material, reduces the viscosity of slurry, improves the hydrodynamics of coating.
In order to preferably verify that it is negative to battery in battery cathode that composite dispersing agent provided in an embodiment of the present invention is used in
The dispersion effect of pole piece, the lithium ion battery negative to being prepared using the embodiment of the present invention 1 and comparative example 1 is entered
Row SEM is characterized.The scanning electron microscope for being adopted is Japan's JSM-6380 model scanning electron microscopes,
Observed by the scanning electron microscope, obtain SEM figures shown as depicted in figs. 1 and 2.
Fig. 1 is the negative plate SEM figures that embodiment 1 makes, it can be seen that active substance is in collector point
Dissipate very uniform；Fig. 2 is the SEM figures of the negative plate that comparative example 1 makes, it can be seen that active substance
Material is scattered uneven in whole collector, and the phenomenon of leakage paper tinsel occur in some places.Active substance is in collection
The quality of fluid dispersion, directly affects the performance of battery, including cycle performance, high rate performance, capacity etc.,
This confirms obvious using the dispersion effect of composite dispersing agent provided in an embodiment of the present invention in terms of another
The dispersion effect of the dispersant used better than corresponding comparative example.What the other embodiment that the present invention is provided made
Negative plate, its is apparent very nearly the same with embodiment 1, and coating effect occurs without leakage paper tinsel, and effect is close,
Only illustrating this composite dispersing agent with embodiment 1 has dispersion effect good and the characteristics of without leakage paper tinsel, therefore
Again SEM scannings need not one by one be carried out to other embodiment.
In order to further verify impact of the composite dispersing agent of present invention offer to performance of lithium ion battery, this
The bright test that chemical property is also carried out to the lithium ion battery prepared by embodiment 1～8 and comparative example 1～5.
Concrete test includes as follows：
(1) volume test
Concrete method of testing：Embodiment 1～8 and comparative example 1～5 are charged in 25 DEG C of electric currents with 0.5C straight
It is 4.2V to voltage, then with the current discharge of 0.5C until 2.75V, it is electric that this discharge capacity is designated as 0.5C
Discharge capacity at 25 DEG C of stream, test result is as shown in table 2.
(2) 0.5C normal-temperature circulating performances test
Concrete method of testing：Embodiment 1～8 and comparative example 1～5 are charged in 25 DEG C of electric currents with 0.5C straight
It is 4.2V to voltage, then with the current discharge of 0.5C until 2.75V, then repeats above-mentioned discharge and recharge step
500 times.Obtain circulating the capability retention of 500 times under room temperature, as shown in table 2.
(3) full electricity battery core resistance test
Concrete method of testing：Embodiment 1～8 and comparative example 1～5 are charged in 25 DEG C of electric currents with 0.5C straight
It is 4.2V to voltage, then plays cabinet, with the resistance instrument of direct current its resistance under full electricity is tested, record is obtained
The now resistance of state, as shown in table 2.
(4) 2C discharge-rates
Concrete method of testing：Embodiment 1～8 and comparative example 1～5 are charged in 25 DEG C of electric currents with 0.5C straight
It is 4.2V to voltage, then with the current discharge of 0.5C until 2.75V, is further continued for being filled with the electric current of 0.5C
Electricity to voltage is 4.2V, and afterwards with the current discharge of 2C to 2.75V, the electric discharge for recording 0.5C and 2C is held
Amount, the value in table 2 is the discharge capacity of the discharge capacity/0.5C of 2C.
As can be seen from Table 2, the electricity of the battery that the composite dispersing agent for being provided by the embodiment of the present invention 1～8 makes
Chemical property is significantly better than exclusive use nonionic surfactant or ionic surfactant or nonionic
The electricity that the part by weight of type surfactant/ionic surfactant is not made in the range of this in 9/1-1/9
Pond.
Wherein, the capacity of lithium ion battery prepared by the composite dispersing agent that embodiment 1 is provided can reach
2850mAh, 500 room temperature 0.5C circulations can reach internal resistance 27.2 Ω, 2C/0.5C of 94%, battery
Discharge-rate can reach 83%, and lithium ion battery prepared by the dispersant that the ion of comparative example 1 is provided is corresponding
Data respectively be only the Ω of 2780mAh, 81%, 36.9,52.3%；
The capacity of lithium ion battery prepared by the composite dispersing agent that embodiment 8 is provided can reach 2854mAh,
500 room temperature 0.5C circulations can reach Ω, 2C/0.5C discharge-rate of internal resistance 26.9 of 95.5%, battery
82.6% can be reached, and the lithium ion battery corresponding data that comparative example 5 provides composite dispersing agent preparation is only
2810th, 84%, 35.5 Ω, 53.7%.
The embodiment 1～8 of table 1, the dispersibility of the dispersant of comparative example 1～5 and to lithium ion battery cathode slurry viscosity
Affect
| Sequence number | Viscosity (mPa.s) | The appearance sedimentation time (my god) |
| Embodiment 1 | 2890 | 5 |
| Embodiment 2 | 2950 | 6 |
| Embodiment 3 | 3050 | 4 |
| Embodiment 4 | 3100 | 5 |
| Embodiment 5 | 3200 | 6 |
| Embodiment 6 | 2910 | 5 |
| Embodiment 7 | 2980 | 6 |
| Embodiment 8 | 3080 | 4 |
| Comparative example 1 | 4680 | 1 |
| Comparative example 2 | 4750 | 1 |
| Comparative example 3 | 4836 | 1 |
| Comparative example 4 | 4550 | 2 |
| Comparative example 5 | 4670 | 2 |
The embodiment 1～8 of table 2 and the battery performance test result of comparative example 1～5
Presently preferred embodiments of the present invention is the foregoing is only, it is all at this not to limit the present invention
Any modification, equivalent or improvement made within bright spirit and principle etc., should be included in the present invention
Protection domain within.
Claims (8)
1. a kind of following component of composite dispersing agent, including mass percent：
Nonionic surfactant 50%-90%；
Ionic surfactant 10%-50%.
2. composite dispersing agent as claimed in claim 1, it is characterised in that：The non-ionic surfactant
Agent is at least one in polyoxyethylene-type, EPE polyol EPE.
3. composite dispersing agent as claimed in claim 2, it is characterised in that：Live on the polyoxyethylene-type surface
Property agent be polyoxyethylene lauryl ether, lauryl alcohol at least one；The surface activity of the polyol type
Agent is ethylene glycol, 1,2-PD, BDO, 1,6- hexanediol, neopentyl glycol, Diethylene Glycol,
At least one in dipropylene glycol, diglycol, trimethylolpropane and glycerol.
4. composite dispersing agent as claimed in claim 1, it is characterised in that：The ionic surfactant
In for Brij 35 sodium sulfate, ammonium lauryl sulfate, SAS at least one
Kind.
5. a kind of lithium ion battery cathode slurry, comprising dispersant, it is characterised in that：The dispersant is power
Profit requires the arbitrary described composite dispersing agents of 1-4.
6. lithium ion battery cathode slurry as claimed in claim 5, it is characterised in that：The dispersant
Quality is the 0%-1.5% of the cathode size gross mass.
7. a kind of lithium ion battery negative, including negative electrode active layer, it is characterised in that：The negative electrode active layer
Lithium ion battery cathode slurry by described in claim 5 or 6 is formed.
8. a kind of lithium ion battery, including lithium ion battery negative, it is characterised in that：The lithium ion battery
Negative pole is provided by the lithium ion battery negative described in claim 7.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732150A (en) * | 2017-06-21 | 2018-02-23 | 东莞市创明电池技术有限公司 | Negative electrode of lithium ion battery and preparation method thereof and lithium ion battery |
| CN107732154A (en) * | 2017-11-10 | 2018-02-23 | 江苏华富储能新技术股份有限公司 | Small lithium ion battery of loss of capacitance and preparation method thereof after a kind of circulation electric discharge |
| CN107910520A (en) * | 2017-11-10 | 2018-04-13 | 江苏华富储能新技术股份有限公司 | A kind of lithium ion battery cathode slurry, negative material and preparation method thereof |
| CN114512764A (en) * | 2022-02-21 | 2022-05-17 | 上海凯矜新材料科技有限公司 | Nano alumina diaphragm paint and preparation method thereof |
| CN114709366A (en) * | 2022-03-30 | 2022-07-05 | 大连中比动力电池有限公司 | Hard carbon negative electrode slurry and preparation method thereof |
| CN114975860A (en) * | 2022-06-28 | 2022-08-30 | 重庆冠宇电池有限公司 | Negative plate and battery |
| CN115498190A (en) * | 2022-10-26 | 2022-12-20 | 楚能新能源股份有限公司 | Dispersing agent for lithium iron phosphate anode slurry, preparation method of lithium iron phosphate anode slurry and lithium ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107732150A (en) * | 2017-06-21 | 2018-02-23 | 东莞市创明电池技术有限公司 | Negative electrode of lithium ion battery and preparation method thereof and lithium ion battery |
| CN107732150B (en) * | 2017-06-21 | 2020-04-14 | 东莞市创明电池技术有限公司 | Lithium ion battery cathode, preparation method thereof and lithium ion battery |
| CN107732154A (en) * | 2017-11-10 | 2018-02-23 | 江苏华富储能新技术股份有限公司 | Small lithium ion battery of loss of capacitance and preparation method thereof after a kind of circulation electric discharge |
| CN107910520A (en) * | 2017-11-10 | 2018-04-13 | 江苏华富储能新技术股份有限公司 | A kind of lithium ion battery cathode slurry, negative material and preparation method thereof |
| CN114512764A (en) * | 2022-02-21 | 2022-05-17 | 上海凯矜新材料科技有限公司 | Nano alumina diaphragm paint and preparation method thereof |
| CN114709366A (en) * | 2022-03-30 | 2022-07-05 | 大连中比动力电池有限公司 | Hard carbon negative electrode slurry and preparation method thereof |
| CN114975860A (en) * | 2022-06-28 | 2022-08-30 | 重庆冠宇电池有限公司 | Negative plate and battery |
| CN115498190A (en) * | 2022-10-26 | 2022-12-20 | 楚能新能源股份有限公司 | Dispersing agent for lithium iron phosphate anode slurry, preparation method of lithium iron phosphate anode slurry and lithium ion battery |
| CN116504985A (en) * | 2023-06-28 | 2023-07-28 | 深圳海辰储能控制技术有限公司 | Positive plate, preparation method thereof, energy storage equipment and electric equipment |
| CN116504985B (en) * | 2023-06-28 | 2024-02-20 | 深圳海辰储能控制技术有限公司 | Positive plate, preparation method thereof, energy storage equipment and electric equipment |
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