CN115838572B - Method for producing modified adhesive tape, secondary battery, battery module, battery pack, and electric device - Google Patents
Method for producing modified adhesive tape, secondary battery, battery module, battery pack, and electric device Download PDFInfo
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- CN115838572B CN115838572B CN202111272478.6A CN202111272478A CN115838572B CN 115838572 B CN115838572 B CN 115838572B CN 202111272478 A CN202111272478 A CN 202111272478A CN 115838572 B CN115838572 B CN 115838572B
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- Prior art keywords
- film
- modified
- solvent
- adhesive tape
- producing
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- 239000002390 adhesive tape Substances 0.000 title claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000002904 solvent Substances 0.000 claims abstract description 50
- 239000000853 adhesive Substances 0.000 claims abstract description 48
- 230000001070 adhesive effect Effects 0.000 claims abstract description 48
- 150000001875 compounds Chemical class 0.000 claims abstract description 34
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- 238000005805 hydroxylation reaction Methods 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 26
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 25
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 230000033444 hydroxylation Effects 0.000 claims abstract description 19
- 239000008367 deionised water Substances 0.000 claims abstract description 18
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 16
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 16
- 238000005406 washing Methods 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 239000012459 cleaning agent Substances 0.000 claims abstract description 9
- 238000002791 soaking Methods 0.000 claims abstract description 9
- 239000011259 mixed solution Substances 0.000 claims abstract description 8
- 230000007935 neutral effect Effects 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 57
- 229910052739 hydrogen Inorganic materials 0.000 claims description 36
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 30
- 239000000243 solution Substances 0.000 claims description 30
- 239000007864 aqueous solution Substances 0.000 claims description 28
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 21
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 claims description 20
- 241000252506 Characiformes Species 0.000 claims description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 229920002125 Sokalan® Polymers 0.000 claims description 9
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 claims description 7
- 239000004584 polyacrylic acid Substances 0.000 claims description 7
- 235000019441 ethanol Nutrition 0.000 claims description 6
- 230000000640 hydroxylating effect Effects 0.000 claims description 6
- 229920000858 Cyclodextrin Polymers 0.000 claims description 5
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 claims description 5
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 4
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 3
- VTJUKNSKBAOEHE-UHFFFAOYSA-N calixarene Chemical compound COC(=O)COC1=C(CC=2C(=C(CC=3C(=C(C4)C=C(C=3)C(C)(C)C)OCC(=O)OC)C=C(C=2)C(C)(C)C)OCC(=O)OC)C=C(C(C)(C)C)C=C1CC1=C(OCC(=O)OC)C4=CC(C(C)(C)C)=C1 VTJUKNSKBAOEHE-UHFFFAOYSA-N 0.000 claims description 3
- 125000005442 diisocyanate group Chemical group 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 229920001228 polyisocyanate Polymers 0.000 claims description 3
- 239000005056 polyisocyanate Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 125000003944 tolyl group Chemical group 0.000 claims description 3
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims 2
- 238000011010 flushing procedure Methods 0.000 abstract description 6
- 229920002799 BoPET Polymers 0.000 description 43
- 230000000052 comparative effect Effects 0.000 description 24
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- 239000000463 material Substances 0.000 description 18
- 229910052751 metal Inorganic materials 0.000 description 15
- 239000002184 metal Substances 0.000 description 15
- 239000003792 electrolyte Substances 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 229910052782 aluminium Inorganic materials 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 12
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 11
- 239000002131 composite material Substances 0.000 description 11
- 125000005373 siloxane group Chemical group [SiH2](O*)* 0.000 description 11
- 238000004132 cross linking Methods 0.000 description 10
- 239000001257 hydrogen Substances 0.000 description 10
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 8
- 229910052744 lithium Inorganic materials 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 239000000654 additive Substances 0.000 description 7
- 239000007774 positive electrode material Substances 0.000 description 7
- 229910000572 Lithium Nickel Cobalt Manganese Oxide (NCM) Inorganic materials 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 6
- 239000006258 conductive agent Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
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- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- 229920001707 polybutylene terephthalate Polymers 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 229920001450 Alpha-Cyclodextrin Polymers 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- HFHDHCJBZVLPGP-RWMJIURBSA-N alpha-cyclodextrin Chemical compound OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO HFHDHCJBZVLPGP-RWMJIURBSA-N 0.000 description 4
- 229940043377 alpha-cyclodextrin Drugs 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 239000006183 anode active material Substances 0.000 description 4
- 238000012512 characterization method Methods 0.000 description 4
- 239000011267 electrode slurry Substances 0.000 description 4
- 125000004185 ester group Chemical group 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 235000021317 phosphate Nutrition 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
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- 239000012948 isocyanate Substances 0.000 description 3
- 150000002513 isocyanates Chemical class 0.000 description 3
- ILXAVRFGLBYNEJ-UHFFFAOYSA-K lithium;manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[O-]P([O-])([O-])=O ILXAVRFGLBYNEJ-UHFFFAOYSA-K 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000007773 negative electrode material Substances 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- HHVIBTZHLRERCL-UHFFFAOYSA-N sulfonyldimethane Chemical compound CS(C)(=O)=O HHVIBTZHLRERCL-UHFFFAOYSA-N 0.000 description 3
- 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
- 229910001316 Ag alloy Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
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- 239000004793 Polystyrene Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
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- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 description 2
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 description 2
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- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
- 229910021437 lithium-transition metal oxide Inorganic materials 0.000 description 2
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- HAMGRBXTJNITHG-UHFFFAOYSA-N methyl isocyanate Chemical group CN=C=O HAMGRBXTJNITHG-UHFFFAOYSA-N 0.000 description 2
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- 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
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- HNAGHMKIPMKKBB-UHFFFAOYSA-N 1-benzylpyrrolidine-3-carboxamide Chemical compound C1C(C(=O)N)CCN1CC1=CC=CC=C1 HNAGHMKIPMKKBB-UHFFFAOYSA-N 0.000 description 1
- MBDUIEKYVPVZJH-UHFFFAOYSA-N 1-ethylsulfonylethane Chemical compound CCS(=O)(=O)CC MBDUIEKYVPVZJH-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
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 1
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- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- JGFBQFKZKSSODQ-UHFFFAOYSA-N Isothiocyanatocyclopropane Chemical compound S=C=NC1CC1 JGFBQFKZKSSODQ-UHFFFAOYSA-N 0.000 description 1
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 1
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- 229910013292 LiNiO Inorganic materials 0.000 description 1
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical compound CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
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- 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
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 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
- 230000007774 longterm Effects 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- UUIQMZJEGPQKFD-UHFFFAOYSA-N n-butyric acid methyl ester Natural products CCCC(=O)OC UUIQMZJEGPQKFD-UHFFFAOYSA-N 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002961 polybutylene succinate Polymers 0.000 description 1
- 239000004631 polybutylene succinate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000002153 silicon-carbon composite material Substances 0.000 description 1
- 125000004469 siloxy group Chemical group [SiH3]O* 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 229910021384 soft carbon Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229910052718 tin 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
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
Landscapes
- Adhesives Or Adhesive Processes (AREA)
Abstract
The application provides a manufacturing method of a modified adhesive tape, which comprises the following steps of S1: completely soaking the polyethylene terephthalate film in a cleaning agent at normal temperature, repeatedly washing with deionized water after the cleaning is finished, and drying to obtain a film A, wherein the step S2 is as follows: uniformly coating a hydroxylation reagent on two sides of the film A for hydroxylation reaction, flushing the film A by deionized water until the pH value of the film A surface is approximately neutral, and drying to obtain a film B, wherein the step S3 is as follows: immersing the first surface of the film B into the mixed solution of the silane coupling agent and the solvent A, taking out after reacting at normal temperature, cleaning, and drying under reduced pressure, wherein the step S4 is as follows: mixing an organic supermolecular compound, an adhesive, a solvent B and a curing agent, uniformly coating the obtained mixture on a second surface of the dried B film, which is positioned on the opposite side of the first surface, and drying to obtain the modified adhesive tape.
Description
Technical Field
The application relates to the technical field of secondary batteries, in particular to a modified adhesive tape, a manufacturing method of the modified adhesive tape, a secondary battery, a battery module, a battery pack and an electric device.
Background
In recent years, as the application range of secondary batteries is becoming wider, secondary batteries are widely used in energy storage power systems such as hydraulic power, thermal power, wind power and solar power stations, and in various fields such as electric tools, electric bicycles, electric motorcycles, electric vehicles, military equipment, aerospace and the like. As secondary batteries have been greatly developed, there is a higher demand for their safety performance, particularly when assembled into a battery pack, and assembled into a corresponding power consumption device. In the process of assembling the battery module, an insulating layer needs to be wrapped on the surface of the battery shell, a polyethylene terephthalate (PET) film is usually used, and then an adhesive is coated on the large surface and the side surface of the secondary battery of the PET film to connect the heat insulation pad and the side plate of the module.
However, in the conventional PET film, the PET has high molecular chain rigidity and crystallization capability and poor compatibility with most polymers, so that the PET film and the structural adhesive are connected to fail and are not high-temperature resistant under the influence of long-time impact and vibration, and the safety of the battery module is affected. Thus, the existing adhesives remain to be improved.
Disclosure of Invention
Technical problem to be solved by the invention
The present invention has been made in view of the above problems, and an object thereof is to provide a modified adhesive tape and a method for producing the same, which can absorb vibration and impact, and which can have high adhesion even after a long-term vibration action, thereby ensuring the safety of a battery module.
Technical scheme for solving problems
In order to achieve the above object, the present application provides a method for manufacturing a modified adhesive tape, a secondary battery, a battery module, a battery pack, and an electric device.
The first aspect of the present application also provides a method for manufacturing a modified adhesive tape, comprising:
step S1: completely soaking a polyethylene terephthalate film in a cleaning agent at normal temperature, treating for a period of time, repeatedly washing with deionized water after the cleaning is finished, and drying to obtain a film A;
step S2: uniformly coating a hydroxylation reagent on two sides of the film A for hydroxylation reaction, flushing the film A by deionized water until the pH value of the film A surface is approximately neutral, and drying to obtain a film B;
step S3: immersing the first surface of the film B into the mixed solution of the silane coupling agent and the solvent A, taking out after reacting at normal temperature, cleaning, and drying under reduced pressure;
Step S4: mixing an organic supermolecular compound, an adhesive, a solvent B and a curing agent, and uniformly coating the obtained mixture on a second surface of the B film, which is positioned on the opposite side of the first surface, so as to obtain the modified adhesive tape.
Thus, although the mechanism is not yet clear, it is assumed that the above-described method for producing a modified adhesive tape of the present invention can graft a siloxane group on the first surface of the modified adhesive tape, thereby improving the adhesion and high temperature resistance of the modified adhesive tape to the metal casing of a secondary battery; the second surface of the modified adhesive tape, which is positioned at the opposite side of the first surface, is grafted with organic supermolecules, so that the crosslinking degree of the second surface is improved, the elasticity is improved, and the vibration and impact resistance of the modified adhesive tape is further improved.
Organic supermolecules are molecules in which two or more molecules are bound together by intermolecular interactions to form complex, organized aggregates. In organic supermolecules, intermolecular forces mainly produce a binding effect, and certain specific supermolecules also have the characteristics of steric hindrance, sliding, elasticity and the like.
In any embodiment, in the step S1, the cleaning agent is one or more of absolute ethyl alcohol, ethyl acetate, or methyl formate; and/or the cleaning time is 10-20 minutes. Therefore, from the viewpoint of cleaning the surface of the PET film, the reagent is selected as a cleaning agent.
In any embodiment, in the step S2, the hydroxylating reagent is 1mol/L NaOH solution, 1mol/L KOH solution, 98 wt% H 2 SO 4 Aqueous solution, piranha solution, 10 wt% FeSO 4 -30 wt% H 2 O 2 Aqueous solution, 25 wt% K 2 MnO 4 One or more of the aqueous solutions, optionally, a piranha solution; the hydroxylation time is 10-20 minutes, optionally 15 minutes; the hydroxylation temperature is 15-60 ℃, alternatively 25 ℃. Therefore, after the hydroxylation treatment, the PET film has good hydrophilicity, and is favorable for subsequent grafting of siloxane groups and organic supermolecules.
In any embodiment, 98 wt.% H in the piranha solution 2 SO 4 Aqueous solution and 30 wt% H 2 O 2 The volume ratio of the aqueous solution is 3:1 to 7:1, alternatively, 5:1. Thus, when the piranha solution is within the above range, the degree of hydroxylation of the PET film is increased.
In any embodiment, in the step S3, 5.7 to 17.1 parts of the silane coupling agent are used, based on 100 parts by mass of the total amount of the silane coupling agent and the solvent a; 82.9-94.3 parts of solvent A. Thus, when the silane coupling agent and the solvent A are within the above-mentioned ranges, the silane coupling agent can be sufficiently dissolved in the solvent A to form a uniform solution, and the surface of the PET film can be uniformly and sufficiently grafted with the siloxane groups.
In any embodiment, in the step S3, the silane coupling agent may be one or more of 3-aminopropyl trimethoxysilane, 3-aminopropyl triethoxysilane, vinyl trimethoxysilane, vinyl triethoxysilane, and γ -glycidoxypropyl trimethoxysilane; the solvent A is one or more of ethyl acetate, methyl formate, ethanol and toluene, and optionally toluene.
Therefore, the polar functional group of the silane coupling agent selected by the application has good reactivity to organic matters, and the siloxy of the silane coupling agent has good reactivity to metal surfaces. The silane coupling agent can be fully dissolved in the solvent A, and can be fully grafted with hydroxyl on the surface of the PET film, so that the adhesive force and the high temperature resistance between the modified adhesive tape and the metal shell of the secondary battery are enhanced.
In any embodiment, in the step S4, the organic supermolecular compound is 15 to 20 parts, the adhesive is 30 to 40 parts, the solvent B is 30 to 50 parts, and the curing agent is 1 to 5 parts, based on 100 parts by mass of the total amount of the organic supermolecular compound, the adhesive, the solvent B, and the curing agent.
Therefore, when the organic supermolecule compound, the adhesive, the solvent B and the curing agent are in the above range, the second surface of the modified adhesive tape is sufficiently and uniformly grafted with the organic supermolecule, the crosslinking degree of the second surface is improved, the elasticity and the adhesive force of the modified adhesive tape are improved, and the vibration resistance and the impact resistance of the modified adhesive tape are further improved.
In any embodiment, in the step S4, the organic supermolecular compound may be one or more of cyclodextrin and calixarene; and/or the adhesive can be one or more of polyacrylic acid, polyurethane, epoxy resin and polyimide; and/or the solvent B is one or more of ethyl acetate, methyl formate, ethanol and toluene, optionally toluene; and/or the curing agent is one or more of isocyanate, diisocyanate and polyisocyanate.
Therefore, the organic supermolecular compound, the adhesive and the curing agent are matched for use, the synergistic effect of the organic supermolecular compound, the adhesive and the curing agent can be well exerted, the crosslinking degree of the second surface is improved, the elasticity is improved, and the impact resistance and the vibration resistance of the modified adhesive tape are further fully improved.
In any embodiment, in the step S4, the mixture is applied to a thickness of 40 to 60 μm. Thus, when the coating thickness of the mixture is within the above-described range, the assembly of the battery module is facilitated.
A second aspect of the present application provides a secondary battery comprising the modified tape prepared by the method of the first aspect of the present application.
A third aspect of the present application provides a battery module including the secondary battery of the second aspect of the present application.
A fourth aspect of the present application provides a battery pack comprising the battery module of the third aspect of the present application.
A fifth aspect of the present application provides an electric device comprising at least one selected from the secondary battery of the second aspect of the present application, the battery module of the third aspect of the present application, or the battery pack of the fourth aspect of the present application.
Effects of the invention
The application provides a manufacturing method of a modified adhesive tape, a secondary battery, a battery module, a battery pack and an electric device. Although the mechanism is not clear, it is supposed that the PET film is used as a base material, after the hydroxylation treatment is carried out on the PET film, the grafted siloxane group is grafted on the first surface, and the grafted siloxane group can generate a bonding effect with a metal interface through a hydrogen bond, so that the first surface of the modified adhesive tape is bonded with the metal shell of the secondary battery; the second surface of the modified adhesive tape is bonded with a plastic part, particularly a heat insulation pad or a side plate of the battery module bonded by the modified adhesive tape, and the modified adhesive tape has excellent elastic performance under the action of vibration and impact energy and can resist vibration and impact for a long time.
Drawings
Fig. 1 is a schematic view of a modified tape of the present application.
Fig. 2 is a fourier infrared (FTIR) spectrum of the modified tape after step S2 of example 1 of the present application.
Fig. 3 is a fourier infrared spectrum (FTIR) plot of the modified tape after step S3 of example 1 of the present application.
Fig. 4 is a fourier infrared spectrum (FTIR) diagram of the modified tape mixed alumina powder after step S3 of example 1 of the present application.
Fig. 5 is a fourier infrared spectrum (FTIR) plot of the modified tape after step S4 of example 1 of the present application.
Fig. 6 is a schematic view of a secondary battery according to an embodiment of the present application.
Fig. 7 is an exploded view of the secondary battery according to an embodiment of the present application shown in fig. 5.
Fig. 8 is a schematic view of a battery module according to an embodiment of the present application.
Fig. 9 is an exploded view of a battery module according to an embodiment of the present application
Fig. 10 is a schematic view of a battery pack according to an embodiment of the present application.
Fig. 11 is an exploded view of the battery pack of the embodiment of the present application shown in fig. 10.
Fig. 12 is a schematic view of an electric device in which the secondary battery according to an embodiment of the present application is used as a power source.
Reference numerals illustrate:
1, a battery pack; 2, upper box body; 3, lower box body; 4, a battery module; 5 a secondary battery; a 41 side plate; 42 end plates; 43 large faces; 44 sides; 51 a housing; 52 electrode assembly; 53 roof assembly
Detailed Description
Hereinafter, embodiments of a method for manufacturing a modified adhesive tape, a secondary battery, a battery module, a battery pack, and an electric device of the present application are specifically disclosed with reference to the accompanying drawings as appropriate. However, unnecessary detailed description may be omitted. For example, detailed descriptions of well-known matters and repeated descriptions of the actual same structure may be omitted. This is to avoid that the following description becomes unnecessarily lengthy, facilitating the understanding of those skilled in the art. Furthermore, the drawings and the following description are provided for a full understanding of the present application by those skilled in the art, and are not intended to limit the subject matter recited in the claims.
The "range" disclosed herein is defined in terms of lower and upper limits, with a given range being defined by the selection of a lower and an upper limit, the selected lower and upper limits defining the boundaries of the particular range. Ranges that are defined in this way can be inclusive or exclusive of the endpoints, and any combination can be made, i.e., any lower limit can 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, it is understood that ranges of 60-110 and 80-120 are also contemplated. Furthermore, if the minimum range values 1 and 2 are listed, and if the maximum range values 3,4 and 5 are listed, the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In this application, unless otherwise indicated, the numerical range "a-b" represents a shorthand representation of any combination of real numbers between a and b, where a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" have been listed throughout, and "0-5" is simply a shorthand representation of a combination of these values. When a certain parameter is expressed as an integer of 2 or more, it is disclosed that the parameter is, for example, an integer of 2, 3,4, 5, 6, 7, 8, 9, 10, 11, 12 or the like.
All embodiments and alternative embodiments of the present application may be combined with each other to form new solutions, unless specifically stated otherwise.
All technical features and optional technical features of the present application may be combined with each other to form new technical solutions, unless specified otherwise.
All steps of the present application may be performed sequentially or randomly, preferably sequentially, unless otherwise indicated. For example, the method comprises steps (a) and (b), meaning that the method may comprise steps (a) and (b) performed sequentially, or may comprise steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order, for example, the method may include steps (a), (b) and (c), may include steps (a), (c) and (b), may include steps (c), (a) and (b), and the like.
Reference herein to "comprising" and "including" means open ended, as well as closed ended, unless otherwise noted. For example, the terms "comprising" and "comprises" may mean that other components not listed may be included or included, or that only listed components may be included or included.
The term "or" is inclusive in this application, unless otherwise specified. For example, the phrase "a or B" means "a, B, or both a and B. More specifically, either of the following conditions satisfies the condition "a or B": a is true (or present) and B is false (or absent); a is false (or absent) and B is true (or present); or both A and B are true (or present).
Method for producing modified adhesive tape
In one embodiment of the present application, a first aspect of the present application provides a method for manufacturing a modified tape, comprising:
step S1: completely soaking a polyethylene terephthalate (PET) film in a cleaning agent at normal temperature, treating for a period of time, repeatedly washing with deionized water after cleaning, and drying to obtain a film A;
step S2: uniformly coating a hydroxylation reagent on two sides of the film A for hydroxylation reaction, flushing the film A by deionized water until the pH value of the film A surface is approximately neutral, and drying to obtain a film B;
step S3: immersing the first surface of the film B into the mixed solution of the silane coupling agent and the solvent A, taking out after reacting at normal temperature, cleaning, and drying under reduced pressure;
step S4: mixing an organic supermolecular compound, an adhesive, a solvent B and a curing agent, and uniformly coating the obtained mixture on a second surface of the B film, which is positioned on the opposite side of the first surface, so as to obtain the modified adhesive tape.
Referring to fig. 1, the modified tape includes a first surface and a second surface. Although the mechanism is not yet clear, the applicant has unexpectedly found that: by the method for manufacturing the modified adhesive tape, the first surface of the modified adhesive tape is grafted with the siloxane group, so that the adhesion force and the high-temperature resistance of the modified adhesive tape to the metal shell of the secondary battery are improved; the second surface of the modified adhesive tape is grafted with organic supermolecules, and the organic supermolecules have good adhesion through crosslinking reaction with the adhesive, and meanwhile, as the organic supermolecule compound has a micro-cavity structure, the organic supermolecule compound can generate interaction through intermolecular acting force, so that vibration impact can be absorbed, and the adhesive has higher adhesion after long-time vibration.
Organic supermolecules refer to two or more molecules that combine together by intermolecular interactions to form complex, organized aggregates. In the organic supermolecule, the intermolecular force is mainly used for generating a combination effect, and meanwhile, some specific supermolecules also have the characteristics of steric hindrance, sliding, elasticity and the like.
In some embodiments, in the step S1, the cleaning agent is one or more of absolute ethanol, ethyl acetate, or methyl formate; and/or the cleaning time is 10-20 minutes. Therefore, from the viewpoint of cleaning the surface of the PET film, the reagent is selected as a cleaning agent.
In some embodiments, in the step S2, the hydroxylating reagent is 1mol/L NaOH solution, 1mol/L KOH solution, 98 wt% H 2 SO 4 Aqueous solution, piranha solution, 10 wt% FeSO 4 -30 wt% H 2 O 2 Aqueous solution, 25 wt% K 2 MnO 4 One or more of the aqueous solutions, optionally, a piranha solution; the hydroxylation time is 10-20 minutes, optionally 15 minutes; the hydroxylation temperature is 15-60 ℃, alternatively 25 ℃.
Referring to FIG. 2, after step S2 of example 1 of the present application, the modified adhesive tape was used at 3200-3600 cm -1 There appears a distinct absorption peak of the hydroxyl vibration at 2900cm -1 The absorption peak appears at the left and right parts is caused by the hydrogen bond action generated by the action of hydroxyl end groups and carboxyl end groups of PET molecules; at 700-1800 cm -1 The absorption peak of the hydroxylated sample in the fingerprint area is stronger than that of the sample without hydroxylation, which indicates that the hydroxyl is successfully grafted on the end part and the molecular chain of the PET molecule, so that the ester absorption peak and the benzene ring absorption peak of the PET molecule are enhanced. After the PET film is treated by the hydroxylation reagent, hydroxyl is introduced into the surface of the PET film, so that the reactivity and the hydrophilicity of the film surface are improved, subsequent grafting of siloxane groups and organic supermolecules is facilitated, and the adhesive force, the elasticity and the elasticity of the modified adhesive tape are improved High temperature resistance.
98 wt% H in the piranha solution 2 SO 4 Aqueous solution and 30 wt% H 2 O 2 The volume ratio of the aqueous solution is 3:1 to 7:1, alternatively, 5:1.
Although both the acidic hydroxylating reagent and the acidic hydroxylating reagent can introduce hydroxyl groups on the surface of the PET film, the PET film can be hydrolyzed under alkaline conditions, and the mechanical strength of the PET film serving as a base material is affected. Therefore, the hydroxylation treatment is carried out on the PET film under the acidic condition, so that the reactivity of the surface of the PET film can be improved, and the self structure of the PET film substrate can be maintained. When the piranha solution is in the above range, the PET film has a good degree of hydroxylation.
In some embodiments, in the step S3, the silane coupling agent is 5.7 to 17.1 parts by mass based on 100 parts by mass of the total amount of the silane coupling agent and the solvent a; 82.9-94.3 parts of solvent.
Referring to FIG. 3, after step S3 of example 1 of the present application, the modified tape was applied at 1750cm -1 、1300～1500cm -1 The absorption vibration peak of the ester group corresponding to the position is weakened by 1200 cm to 1250cm -1 The silica-based absorption vibration peak at the site was enhanced, indicating that the silica-based group of the silane coupling agent was grafted onto the ester group of the PET molecule. Thus, when the silane coupling agent and the solvent A are within the above-mentioned ranges, the silane coupling agent can be sufficiently dissolved in the solvent A to form a uniform solution, and the first surface of the PET film can be uniformly and sufficiently grafted with the siloxane groups.
In some embodiments, in the step S3, the silane coupling agent may be one or more of 3-aminopropyl trimethoxysilane, 3-aminopropyl triethoxysilane, vinyl trimethoxysilane, vinyl triethoxysilane, and γ -glycidoxypropyl trimethoxysilane; the solvent A is one or more of ethyl acetate, methyl formate, ethanol and toluene, and optionally toluene.
Referring to FIG. 4, after step S3 of example 1 of the present application, the modified tape was placed at 3600cm -1 There appears a vibration peak which absorbs the vibration peak hydroxyl group, wherein the hydroxyl vibration peak of the sample to which the alumina powder is added is 2800～3000cm -1 The formation of absorption peaks at this location is due to the shift of the hydroxyl vibrational peak to low wavenumber due to intermolecular hydrogen bonding, indicating hydrogen bonding between the grafted siloxane groups and alumina on the PET film. The general formula of the silane coupling agent is Y-R-Si (OR) 3 Wherein Y is a polar functional group and has chemical bonding effect with the PET film base material after hydroxylation treatment; - (SiOR) 3 The silicon alkoxide is reactive to the metal surface, reacts with the aluminum or steel case of the secondary battery, and is bonded together by hydrogen bonding. The silane coupling agent can be fully dissolved in the solvent A, and can be fully grafted with hydroxyl on the surface of the PET film, so that the adhesive force and the high temperature resistance between the modified adhesive tape and the metal shell of the secondary battery are enhanced.
In some embodiments, in the step S4, the organic supermolecular compound is 15 to 20 parts, the adhesive is 30 to 40 parts, the solvent B is 30 to 50 parts, and the curing agent is 1 to 5 parts, based on 100 parts by mass of the total amount of the organic supermolecular compound, the adhesive, the solvent B, and the curing agent.
Referring to FIG. 5, after step S4 of example 1 herein, the vibration peak of the ester group of the modified tape was significantly reduced, indicating that isocyanate was grafted onto the ester group; 2600-3600 cm -1 The vibration peak of hydroxyl and the dispersed absorption peak of hydrogen bonding occur because the organic supermolecule (cyclodextrin is the organic supermolecule) has a large number of hydroxyl groups, which generate intermolecular and intramolecular hydrogen bonds to form the dispersed absorption peak of hydrogen bonding, 600-1400 cm -1 The occurrence of successive absorption peaks corresponds to-CH in cyclodextrin molecules 2 -C-O-C-and-NH 2 The group absorbs the vibrational peak. Therefore, when the organic supermolecule compound, the adhesive, the solvent B and the curing agent are in the above range, the second surface of the modified adhesive tape is sufficiently and uniformly grafted with the organic supermolecule, the crosslinking degree is improved, the elasticity and the adhesive force of the modified adhesive tape are improved, and the vibration resistance and the impact resistance of the modified adhesive tape are further improved.
In some embodiments, in the step S4, the organic supermolecular compound may be one or more of cyclodextrin and calixarene; and/or the adhesive can be one or more of polyacrylic acid, polyurethane, epoxy resin and polyimide; and/or the solvent B is one or more of ethyl acetate, methyl formate, ethanol and toluene, optionally toluene; and/or the curing agent is one or more of isocyanate, diisocyanate and polyisocyanate.
The curing agent and the adhesive react with the annular or cup-shaped organic supermolecule in a crosslinking way, so that the organic supermolecule, the adhesive and the PET film are connected together. The organic supermolecular compound, the adhesive and the curing agent are matched for use, so that the synergistic effect of the organic supermolecular compound, the adhesive and the curing agent can be exerted, the crosslinking degree of the surface is improved, the elasticity is improved, and the impact resistance and the vibration resistance of the modified adhesive tape are further fully improved.
In some embodiments, in the step S4, the mixture is coated to a thickness of 40 to 60 μm. When the coating thickness of the mixture is within the above range, the assembly of the battery module is facilitated.
In addition, fourier infrared spectroscopy was performed in this application using an iS10 infrared spectrometer (manufacturer: thermo filter) as follows:
1. Characterization before and after hydroxylation: samples were prepared by taking 0.5g of each of the modified tape and the blank PET film obtained in step S2 of example 1, and comparing the test FTIR data.
2. First surface characterization: samples were prepared by taking 0.5g of each of the modified tape after step S2 and the modified tape after step S3 in example 1, and comparing the test FTIR data.
3. Characterization of hydrogen bonding between the first surface and the aluminum shell surface: samples were prepared by taking 0.5g of the modified tape obtained in step S3 of example 1, and 50mg of alumina powder was uniformly added to the sample tape, and then the FTIR data were compared.
4. Second surface characterization: samples were prepared by taking 0.5g of each of the modified tape after step S2 and the modified tape after step S4 in example 1, and comparing the test FTIR data.
The secondary battery, the battery module, the battery pack, and the electric device of the present application will be described below with reference to the drawings as appropriate.
In one embodiment of the present application, a secondary battery is provided.
In general, a secondary battery includes a positive electrode tab, a negative electrode tab, an electrolyte, and a separator. During the charge and discharge of the battery, active ions are inserted and extracted back and forth between the positive electrode plate and the negative electrode plate. The electrolyte plays a role in ion conduction between the positive electrode plate and the negative electrode plate. The isolating film is arranged between the positive pole piece and the negative pole piece, and mainly plays a role in preventing the positive pole piece and the negative pole piece from being short-circuited, and meanwhile ions can pass through the isolating film.
[ Positive electrode sheet ]
The positive pole piece comprises a positive current collector and a positive film layer arranged on at least one surface of the positive current collector, wherein the positive film layer comprises a positive active material.
As an example, the positive electrode current collector has two surfaces opposing in its own thickness direction, and the positive electrode film layer is provided on either one or both of the two surfaces opposing the positive electrode current collector.
In some embodiments, the positive current collector may employ a metal foil or a composite current collector. For example, as the metal foil, aluminum foil may be used. The composite current collector may include a polymeric material base layer and a metal layer formed on at least one surface of the polymeric material base layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel alloy, titanium alloy, silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polystyrene (PS), polyethylene (PE), etc.).
In some embodiments, the positive electrode active material may employ a positive electrode active material for a battery, which is well known in the art. As an example, the positive electrode active material may include at least one of the following materials: olivine structured lithium-containing phosphates, lithium transition metal oxides and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery positive electrode active material may be used. These positive electrode active materials Only one kind may be used alone, or two or more kinds may be used in combination. Examples of lithium transition metal oxides may include, but are not limited to, lithium cobalt oxide (e.g., liCoO) 2 ) Lithium nickel oxide (e.g. LiNiO) 2 ) Lithium manganese oxide (e.g. LiMnO 2 、LiMn 2 O 4 ) Lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (e.g., liNi) 1/3 Co 1/3 Mn 1/3 O 2 (also referred to as NCM) 333 )、LiNi 0.5 Co 0.2 Mn 0.3 O 2 (also referred to as NCM) 523 )、LiNi 0.5 Co 0.25 Mn 0.25 O 2 (also referred to as NCM) 211 )、LiNi 0.6 Co 0.2 Mn 0.2 O 2 (also referred to as NCM) 622 )、LiNi 0.8 Co 0.1 Mn 0.1 O 2 (also referred to as NCM) 811 ) Lithium nickel cobalt aluminum oxide (e.g. LiNi 0.85 Co 0.15 Al 0.05 O 2 ) And at least one of its modified compounds and the like. Examples of olivine structured lithium-containing phosphates may include, but are not limited to, lithium iron phosphate (e.g., liFePO 4 (also abbreviated as LFP)), composite material of lithium iron phosphate and carbon, and manganese lithium phosphate (such as LiMnPO) 4 ) At least one of a composite material of lithium manganese phosphate and carbon, and a composite material of lithium manganese phosphate and carbon.
In some embodiments, the positive electrode film layer further optionally includes a binder. As an example, the binder may include at least one of polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), a vinylidene fluoride-tetrafluoroethylene-propylene terpolymer, a vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene terpolymer, a tetrafluoroethylene-hexafluoropropylene copolymer, and a fluoroacrylate resin.
In some embodiments, the positive electrode film layer further optionally includes a conductive agent. As an example, the conductive agent may include at least one of superconducting carbon, acetylene black, carbon black, ketjen black, carbon dots, carbon nanotubes, graphene, and carbon nanofibers.
In some embodiments, the positive electrode sheet may be prepared by: dispersing the above components for preparing the positive electrode sheet, such as the positive electrode active material, the conductive agent, the binder and any other components, in a solvent (such as N-methylpyrrolidone) to form a positive electrode slurry; and (3) coating the positive electrode slurry on a positive electrode current collector, and obtaining a positive electrode plate after the procedures of drying, cold pressing and the like.
[ negative electrode sheet ]
The negative electrode plate comprises a negative electrode current collector and a negative electrode film layer arranged on at least one surface of the negative electrode current collector, wherein the negative electrode film layer comprises a negative electrode active material.
As an example, the anode current collector has two surfaces opposing in its own thickness direction, and the anode film layer is provided on either one or both of the two surfaces opposing the anode current collector.
In some embodiments, the negative electrode current collector may employ a metal foil or a composite current collector. For example, as the metal foil, copper foil may be used. The composite current collector may include a polymeric material base layer and a metal layer formed on at least one surface of the polymeric material base material. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel alloy, titanium alloy, silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polystyrene (PS), polyethylene (PE), etc.).
In some embodiments, the anode active material may employ an anode active material for a battery, which is well known in the art. As an example, the anode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, and the like. The silicon-based material may be at least one selected from elemental silicon, silicon oxygen compounds, silicon carbon composites, silicon nitrogen composites, and silicon alloys. The tin-based material may be at least one selected from elemental tin, tin oxide, and tin alloys. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery anode active material may be used. These negative electrode active materials may be used alone or in combination of two or more.
In some embodiments, the negative electrode film layer further optionally includes a binder. The binder may be at least one selected from Styrene Butadiene Rubber (SBR), polyacrylic acid (PAA), sodium Polyacrylate (PAA) (PAAs), polyacrylamide (PAM), polyvinyl alcohol (PVA), sodium Alginate (SA), polymethacrylic acid (PMAA), and carboxymethyl chitosan (CMCS).
In some embodiments, the negative electrode film layer further optionally includes a conductive agent. The conductive agent is at least one selected from superconducting carbon, acetylene black, carbon black, ketjen black, carbon dots, carbon nanotubes, graphene and carbon nanofibers.
In some embodiments, the negative electrode film layer may optionally further include other adjuvants, such as thickening agents (e.g., sodium carboxymethyl cellulose (CMC-Na)), and the like.
In some embodiments, the negative electrode sheet may be prepared by: dispersing the above components for preparing the negative electrode sheet, such as a negative electrode active material, a conductive agent, a binder and any other components, in a solvent (e.g., deionized water) to form a negative electrode slurry; and coating the negative electrode slurry on a negative electrode current collector, and obtaining a negative electrode plate after the procedures of drying, cold pressing and the like.
[ electrolyte ]
The electrolyte plays a role in ion conduction between the positive electrode plate and the negative electrode plate. The type of electrolyte is not particularly limited in this application, and may be selected according to the need. For example, the electrolyte may be liquid, gel, or all solid.
In some embodiments, the electrolyte is an electrolyte. The electrolyte includes an electrolyte salt and a solvent.
In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis-fluorosulfonyl imide, lithium bis-trifluoromethanesulfonyl imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalato borate, lithium difluorodioxaato phosphate, and lithium tetrafluorooxalato phosphate.
In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methylethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methylpropyl carbonate, ethylpropyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1, 4-butyrolactone, sulfolane, dimethyl sulfone, methyl sulfone, and diethyl sulfone.
In some embodiments, the electrolyte further optionally includes an additive. For example, the additives may include negative electrode film-forming additives, positive electrode film-forming additives, and may also include additives capable of improving certain properties of the battery, such as additives that improve the overcharge performance of the battery, additives that improve the high or low temperature performance of the battery, and the like.
[ isolation Membrane ]
In some embodiments, a separator is further included in the secondary battery. The type of the separator is not particularly limited, and any known porous separator having good chemical stability and mechanical stability may be used.
In some embodiments, the material of the isolating film may be at least one selected from glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride. The separator may be a single-layer film or a multilayer composite film, and is not particularly limited. When the separator is a multilayer composite film, the materials of the respective layers may be the same or different, and are not particularly limited.
In some embodiments, the positive electrode tab, the negative electrode tab, and the separator may be manufactured into an electrode assembly through a winding process or a lamination process.
In some embodiments, the secondary battery may include an outer package. The outer package may be used to encapsulate the electrode assembly and electrolyte described above.
In some embodiments, the outer package of the secondary battery may be a hard case, such as a hard plastic case, an aluminum case, a steel case, or the like. The exterior package of the secondary battery may also be a pouch type pouch, for example. The material of the flexible bag may be plastic, and examples of the plastic include polypropylene, polybutylene terephthalate, and polybutylene succinate.
The shape of the secondary battery is not particularly limited in the present application, and may be cylindrical, square, or any other shape. For example, fig. 6 shows a secondary battery 5 having a square structure as an example, and has a large surface 43 and a side surface 44.
In some embodiments, referring to fig. 7, the outer package may include a housing 51 and a cover 53. The housing 51 may include a bottom plate and a side plate connected to the bottom plate, where the bottom plate and the side plate enclose a receiving chamber. The housing 51 has an opening communicating with the accommodation chamber, and the cover plate 53 can be provided to cover the opening to close the accommodation chamber. The positive electrode tab, the negative electrode tab, and the separator may be formed into the electrode assembly 52 through a winding process or a lamination process. The electrode assembly 52 is enclosed in the accommodating chamber. The electrolyte is impregnated in the electrode assembly 52. The number of electrode assemblies 52 included in the secondary battery 5 may be one or more, and those skilled in the art may select according to specific practical requirements.
In some embodiments, the secondary batteries may be assembled into a battery module, and the number of secondary batteries included in the battery module may be one or more, and the specific number may be selected by one skilled in the art according to the application and capacity of the battery module.
Referring to fig. 8 and 9, fig. 8 is a battery module 4 as one example. Referring to fig. 8, in the battery module 4, a plurality of secondary batteries 5 may be sequentially arranged in the longitudinal direction of the battery module 4. Of course, the arrangement may be performed in any other way. The plurality of secondary batteries 5 may be further fixed by fasteners. Meanwhile, a PET film is coated on the outer case of the secondary battery 5.
Alternatively, referring to fig. 9, the battery module 4 may further include a case having a plurality of secondary batteries 5 accommodated therein, the case including two side plates 41, two end plates 42, the modified tape of the first aspect of the present application being stuck between large faces 43 and side faces 44 of the plurality of secondary batteries 5, and the plurality of secondary batteries 5 being accommodated in the case after the sticking is completed.
In some embodiments, the above battery modules may be further assembled into a battery pack, and the number of battery modules included in the battery pack may be one or more, and a specific number may be selected by those skilled in the art according to the application and capacity of the battery pack.
Fig. 9 and 10 are battery packs 1 as an example. Referring to fig. 9 and 10, a battery case and a plurality of battery modules 4 disposed in the battery case may be included in the battery pack 1. The battery box includes an upper box body 2 and a lower box body 3, and the upper box body 2 can be covered on the lower box body 3 and forms a closed space for accommodating the battery module 4. The plurality of battery modules 4 may be arranged in the battery box in any manner.
In addition, the application also provides an electric device, which comprises at least one of the secondary battery, the battery module or the battery pack. The secondary battery, the battery module, or the battery pack may be used as a power source of the power consumption device, and may also be used as an energy storage unit of the power consumption device. The power utilization device may include mobile devices (e.g., cell phones, notebook computers, etc.), electric vehicles (e.g., electric-only 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., but is not limited thereto.
As the electricity consumption device, a secondary battery, a battery module, or a battery pack may be selected according to the use requirements thereof.
Fig. 11 is an electric device as an example. The electric device is a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle or the like. In order to meet the high power and high energy density requirements of the secondary battery by the power consumption device, a battery pack or a battery module may be employed.
As another example, the device may be a cell phone, tablet computer, notebook computer, or the like. The device is generally required to be light and thin, and a secondary battery can be used as a power source.
Examples
Hereinafter, embodiments of the present application are described. The embodiments described below are exemplary only for the purpose of illustrating the present application and are not to be construed as limiting the present application. The examples are not to be construed as limiting the specific techniques or conditions described in the literature in this field or as per the specifications of the product. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
Example 1
Step S1: completely soaking the PET film in absolute ethyl alcohol at normal temperature (25 ℃), treating for 15 minutes, repeatedly washing with deionized water after washing, and drying to obtain a film A;
step S2: the piranha solution (98 wt% H) 2 SO 4 Aqueous solution and 30 wt% H 2 O 2 Uniformly coating the aqueous solution on the two sides of the film A in a volume ratio of 5:1), reacting for 15 minutes at normal temperature, flushing with deionized water until the pH value of the surface of the film A is nearly neutral, and drying to obtain the film B;
step S3: immersing the first surface of the film B into the mixed solution of the silane coupling agent and toluene, and not immersing the other surface of the film B into the mixed solution; taking out after reacting for 24 hours at normal temperature, washing with toluene, and drying under reduced pressure;
wherein, the silane coupling agent is 3-aminopropyl trimethoxy silane, and the dosage is 3.11g; solvent A was toluene in an amount of 34.4g.
Step S4: mixing an organic supermolecular compound, an adhesive, a solvent B and a curing agent according to a certain mass fraction, and then uniformly coating the mixture on a second surface of the B film, which is positioned on the opposite side of the first surface, so as to obtain the modified adhesive tape.
Wherein, the organic supermolecule compound is alpha-cyclodextrin, and the dosage of the organic supermolecule compound is 18 parts, based on 100 parts by mass of the total amount of the organic supermolecule compound, the adhesive, the solvent and the curing agent; the adhesive is polyacrylic acid, and the dosage of the adhesive is 35 parts; the solvent B is toluene, and the dosage of the solvent B is 45 parts; the curing agent is methyl isocyanate, and the dosage of the curing agent is 2 parts; the coating thickness was 50. Mu.m.
Example 2
Except for step S2, 98 wt% H in the piranha solution 2 SO 4 Aqueous solution and 30 wt% H 2 O 2 The conditions were the same as in example 1 except that the volume ratio of the aqueous solution was 3:1.
Example 3
Except for step S2, 98 wt% H in the piranha solution 2 SO 4 Aqueous solution and 30 wt% H 2 O 2 The conditions were the same as in example 1 except that the volume ratio of the aqueous solution was 7:1.
Example 4
The conditions were the same as in example 1 except that in step S3, the amount of the silane coupling agent 3-aminopropyl trimethoxysilane was 2.07 g.
Example 5
The conditions were the same as in example 1 except that in step S3, the amount of the silane coupling agent 3-aminopropyl trimethoxysilane was 6.22 g.
Example 6
The conditions were the same as in example 1 except that in step S4, the adhesive polyacrylic acid was used in an amount of 38 parts and the organic supermolecular compound α -cyclodextrin was used in an amount of 15 parts.
Example 7
The conditions were the same as in example 1 except that in step S4, the amount of polyacrylic acid used as an adhesive was 33 parts, and the amount of α -cyclodextrin used as an organic supermolecular compound was 20 parts.
Example 8
The conditions were the same as in example 1 except that in step S3, the silane coupling agent was changed to vinyltrimethoxysilane.
Example 9
The conditions were the same as in example 1 except that in step S4, the coating thickness was changed to 40 μm.
Example 10
The conditions were the same as in example 1 except that in step S4, the coating thickness was changed to 60 μm.
Example 11
The conditions were the same as in example 1 except that in step S4, the organic supermolecular compound was changed to calix [4] arene 4-sulfonate.
Comparative example 1
Step S1: completely soaking the PET film in absolute ethyl alcohol at normal temperature (25 ℃), treating for 15 minutes, repeatedly washing with deionized water after washing, and drying to obtain a film A;
step S2: the piranha solution (98 wt% H) 2 SO 4 Aqueous solution and 30 wt% H 2 O 2 The volume ratio of the aqueous solution is 5:1) is evenly coated on the two sides of the film A, the reaction is carried out for 15 minutes at normal temperature, deionized water is used for flushing until the pH value of the surface of the film A is approximately neutral, and the modified adhesive tape is obtained after drying.
Comparative example 2
And (3) completely soaking the PET film in absolute ethyl alcohol at normal temperature (25 ℃), treating for 15 minutes, repeatedly washing with deionized water after washing, and drying to obtain the modified adhesive tape.
Comparative example 3
Step S1: completely soaking the PET film in absolute ethyl alcohol at normal temperature (25 ℃), treating for 15 minutes, repeatedly washing with deionized water after washing, and drying to obtain a film A;
step S2: the piranha solution (98 wt% H) 2 SO 4 Aqueous solution and 30 wt% H 2 O 2 The volume ratio of the aqueous solution is 5:1) is evenly coated on the two sides of the film A, the reaction is carried out for 15 minutes at normal temperature, deionized water is used for flushing until the pH value of the surface of the film A is approximately neutral, and the film B is obtained after drying.
Step S3: immersing the first surface of the film B into the mixed solution of the silane coupling agent and toluene, and not immersing the other surface of the film B into the mixed solution; taking out after reacting for 24 hours at normal temperature, cleaning with toluene, and drying under reduced pressure to obtain a modified adhesive tape;
wherein, the silane coupling agent is 3-aminopropyl trimethoxy silane, and the dosage is 3.11g; the solvent was toluene in an amount of 34.4g.
Comparative example 4
Pretreatment: completely soaking the PET film in absolute ethyl alcohol at normal temperature (25 ℃), treating for 15 minutes, repeatedly washing with deionized water after washing, and naturally airing at normal temperature to obtain a PET film A;
step S2: the piranha solution (98 wt% H) 2 SO 4 Aqueous solution and 30 wt% H 2 O 2 The volume ratio of the aqueous solution is 5:1) is evenly coated on the two sides of the film A, the reaction is carried out for 15 minutes at normal temperature, and deionized water is used for washingNaturally airing at normal temperature until the pH value of the surface of the film A is nearly neutral to obtain a film B;
step S4: mixing an organic supermolecular compound, an adhesive, a solvent B and a curing agent according to a certain mass fraction, uniformly coating the mixture on a second surface of the B film, which is positioned on the opposite side of the first surface, and drying to obtain the modified adhesive tape.
Wherein, the organic supermolecule compound is alpha-cyclodextrin, and the dosage of the organic supermolecule compound is 18 parts, based on 100 parts by mass of the total amount of the organic supermolecule compound, the adhesive, the solvent and the curing agent; the adhesive is polyacrylic acid, and the dosage of the adhesive is 35 parts; the solvent B is toluene, and the dosage of the solvent B is 45 parts; the curing agent is methyl isocyanate, and the dosage of the curing agent is 2 parts; the coating thickness was 50. Mu.m.
The parameters of the modified tapes of examples 1 to 11 and comparative examples 1 to 4 are shown in table 1 below.
Table 1: results of parameters of examples 1 to 11 and comparative examples 1 to 4
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The modified tapes obtained in examples 1 to 11 and comparative examples 1 to 4 were subjected to an adhesion test and a die set vibration and impact test. The test results are shown in tables 2, 3 and 4 below.
(1) And (3) adhesive force test:
1. the modified tapes of examples 1 to 11 and comparative examples 1 to 4 were prepared into standard samples having a length of 150mm and a width of 20mm, and simultaneously an aluminum sheet (thickness of 1 mm) and a blank PET film sample bar (thickness of 0.1 mm) having the same dimensions were prepared;
2. the first surface of each standard sample is bonded on aluminum sheets with the length of 150mm and the width of 20mm in a completely overlapped mode, the bonded aluminum sheets and the modified adhesive tape of the standard sample are torn off for 10mm along the length direction, the aluminum sheets separated by 10mm and the modified adhesive tape of the standard sample are clamped on a CMT6104 universal testing machine (manufacturer: meter (MTS)) for tensile test (the tensile speed is 20mm/min, the tensile direction is perpendicular to the ground), and the maximum value of the tensile curve is taken as the bonding force of the first surface of the modified adhesive tape;
3. The second surface of each standard sample was bonded to a blank PET film with a length of 150mm and a width of 20mm in a fully overlapped manner, the bonded PET film and the modified tape of the standard sample were pulled apart by 10mm in the longitudinal direction, and the PET film and the sample separated by 10mm were fixed on a CMT6104 model universal testing machine (manufacturer: metts (MTS)) for tensile test (tensile speed: 20mm/min, tensile direction: along the direction perpendicular to the ground), and the maximum value of the tensile curve was taken as the adhesive force of the second surface of the tape.
(2) And (3) testing vibration and impact of the module:
1. the modified adhesive tapes of examples 1 to 11 and comparative examples 1 to 4 were adhered to all the large faces 43 and all the side faces 44 of the conventional battery cells 5 (QDE 8A2, the ningde age) shown in fig. 9, the respective battery cells 5 were arranged in a row, two adjacent large faces 43 were adhered together, and the side plates 41/end plates 42 were connected to the side faces 44 and the two large faces 43 of the respective batteries to make up a battery module 4, and each 6 battery cells 5 constituted a battery module 4;
2. the above-mentioned battery module 4 was placed in a vibration table and an impact table, respectively, and vibration and impact having main frequencies of 192.02Hz, 204.86Hz and 242.72Hz were given to a universal tester (manufacturer: meitos) in X, Y and Z directions, respectively, with reference to the X, Y and Z axes being perpendicular to the end plate 42, side plate 41 and bottom surface of the module, respectively.
Vibration test conditions: the input vibration frequency of the equipment is 100-1500 Hz, the duration of high-frequency vibration is 8 hours, and the vibration acceleration is 0-100 m/s 2 。
Impact test conditions: the input vibration frequency range of the equipment is 100-1500 Hz, the high-frequency impact duration is 6ms, and the impact acceleration range is 0-500 m/s 2 。
Table 2: results of the adhesion test of examples 1 to 11 and comparative examples 1 to 4
| Adhesive force of first surface (unit: N) | Adhesion of the second surface (Unit: N) | |
| Example 1 | 8.21 | 15.37 |
| Example 2 | 7.04 | 15.96 |
| Example 3 | 7.73 | 15.25 |
| Example 4 | 7.28 | 14.48 |
| Example 5 | 7.52 | 15.63 |
| Example 6 | 7.01 | 14.08 |
| Example 7 | 7.16 | 13.56 |
| Example 8 | 7.27 | 12.64 |
| Example 9 | 7.23 | 14.95 |
| Example 10 | 7.47 | 11.58 |
| Example 11 | 7.34 | 13.37 |
| Comparative example 1 | 1.05 | 2.72 |
| Comparative example 2 | / | 1.77 |
| Comparative example 3 | 6.52 | 1.14 |
| Comparative example 4 | 1.09 | 12.39 |
Table 3: results of vibration test (unit: hz) for examples 1 to 11 and comparative examples 1 to 4
Table 4: impact test results (Unit: hz) for examples 1 to 11 and comparative examples 1 to 4
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From the above results, it is clear that the modified adhesive tapes obtained in examples 1 to 11 use the PET film as the base material, the first surface is grafted with the siloxane group, and the first surface and the surface of the metal casing of the secondary battery are combined together through hydrogen bond, and meanwhile, the bond energy of the si—o bond is higher, which is beneficial to the high temperature resistance of the modified adhesive tape; the second surface is grafted with organic supermolecules, and the organic supermolecules, the adhesive and the curing agent undergo a crosslinking reaction, so that the crosslinking degree of the second modified layer is improved, and the elasticity is improved. Therefore, the elasticity and the adhesive force of the modified adhesive tape are obviously improved, and the vibration resistance and the impact resistance are also improved.
In contrast, in comparative example 1, only the PET film was subjected to hydroxylation treatment. The PET film was not subjected to any modification treatment in comparative example 2. In comparative example 3, only the first surface was grafted with siloxane groups. Comparative example 4 only organic supermolecules were grafted on the second surface. Thus, the modified adhesive tapes in comparative examples 1 to 4 were significantly reduced in adhesion, and no adhesion was measured between the PET film without hydroxylation treatment and the aluminum sheet in comparative example 2; the modified adhesive tape in comparative example 3 has normal adhesion with the aluminum sheet and smaller adhesion with the PET film; the modified adhesive tape of comparative example 4 had a small adhesion to the aluminum sheet and had a normal adhesion to the PET film.
In addition, examples 2 and 3 adjusted 98 wt% H in the piranha solution as compared to example 1 2 SO 4 And 30 wt% H 2 O 2 The volume ratio of the solutions, but the adjustment did not affect the performance of the modified tapes in examples 2 and 3, still exhibited excellent adhesion and vibration and impact resistance. Examples 4 and 5 adjust the amount of silane coupling agent used. Example 4 the amount of silane coupling agent was reduced but the adhesion of the first surface was reducedFall down but still be within ideal limits. In contrast, example 5 increases the amount of the silane coupling agent used, and the adhesive force of the first surface is not increased but rather decreased. Although example 11 also grafted with organic supermolecules, the modified tape of example 11 exhibited slightly less adhesion and vibration and impact properties than the modified tape of example 1, mainly because the organic supermolecules selected in example 11 failed to synergistically interact in microstructure with the adhesive and curing agent, and the resulting second surface had a degree of crosslinking that did not reach an optimal level.
The present application is not limited to the above embodiment. The above embodiments are merely examples, and embodiments having substantially the same configuration and the same effects as those of the technical idea within the scope of the present application are included in the technical scope of the present application. Further, various modifications that can be made to the embodiments and other modes of combining some of the constituent elements in the embodiments, which are conceivable to those skilled in the art, are also included in the scope of the present application within the scope not departing from the gist of the present application.
Claims (19)
1. A method for producing a modified adhesive tape, comprising
Step S1: completely soaking the polyethylene terephthalate film in a cleaning agent at normal temperature, repeatedly washing with deionized water after the cleaning is finished, drying to obtain a film A,
step S2: uniformly coating a hydroxylation reagent on two sides of the film A for hydroxylation reaction, washing the film A with deionized water until the pH value of the film A is neutral, drying to obtain a film B,
step S3: immersing the first surface of the film B into the mixed solution of the silane coupling agent and the solvent A, taking out after reacting at normal temperature, cleaning, decompressing and drying,
step S4: mixing an organic supermolecular compound, an adhesive, a solvent B and a curing agent, uniformly coating the obtained mixture on a second surface of the dried B film, which is positioned on the opposite side of the first surface, and drying to obtain the modified adhesive tape; the organic supermolecular compound is one or more of cyclodextrin and calixarene; the adhesive is one or more of polyacrylic acid, polyurethane, epoxy resin and polyimide.
2. The method for producing a modified adhesive tape according to claim 1, wherein in the step S1, the cleaning agent is one or more of absolute ethyl alcohol, ethyl acetate and methyl formate; and/or the number of the groups of groups,
the cleaning time is 10-20 minutes.
3. The method for producing a modified adhesive tape according to claim 1 or 2, wherein in step S2, the hydroxylating reagent is 1mol/L aqueous NaOH solution, 1mol/L aqueous KOH solution, 98 wt% H 2 SO 4 Aqueous solution, piranha solution, 10 wt% FeSO 4 -30 wt% H 2 O 2 Aqueous solution, 25 wt% K 2 MnO 4 One or more of the aqueous solutions; and/or the number of the groups of groups,
the hydroxylation reaction time is 10-20 minutes; and/or the number of the groups of groups,
the hydroxylation reaction temperature is 15-60 ℃.
4. The method for producing a modified adhesive tape according to claim 1 or 2, wherein in the step S2, the hydroxylating agent is a piranha solution.
5. The method for producing a modified tape according to claim 1 or 2, wherein the hydroxylation reaction time is 15 minutes.
6. The method for producing a modified tape according to claim 1 or 2, wherein the hydroxylation reaction temperature is 25 ℃.
7. The method for producing a modified tape according to claim 3, wherein 98% by weight of H in the piranha solution 2 SO 4 Aqueous solutionAnd 30 wt% H 2 O 2 The volume ratio of the aqueous solution is 3:1-7:1.
8. The method for producing a modified tape according to claim 7, wherein 98% by weight of H in the piranha solution 2 SO 4 Aqueous solution and 30 wt% H 2 O 2 The volume ratio of the aqueous solution is 5:1.
9. The method for producing a modified adhesive tape according to claim 1, wherein in the step S3, the silane coupling agent is 5.7 to 17.1 parts by mass based on 100 parts by mass of the total amount of the silane coupling agent and the solvent a; 82.9-94.3 parts of solvent A.
10. The method for producing a modified adhesive tape according to claim 1, wherein in the step S3, the silane coupling agent is one or more of 3-aminopropyl trimethoxysilane, 3-aminopropyl triethoxysilane, vinyl trimethoxysilane, vinyl triethoxysilane, and γ -glycidyloxypropyl trimethoxysilane;
the solvent A is one or more of ethyl acetate, methyl formate, ethanol and toluene.
11. The method for producing a modified adhesive tape according to claim 10, wherein the solvent a is toluene.
12. The method according to claim 1, wherein in the step S4, the organic supermolecular compound is 15 to 20 parts by mass, the adhesive is 30 to 40 parts by mass, the solvent B is 30 to 50 parts by mass, and the curing agent is 1 to 5 parts by mass, based on 100 parts by mass of the total amount of the organic supermolecular compound, the adhesive, the solvent B, and the curing agent.
13. The method for producing a modified adhesive tape according to claim 1, wherein in the step S4,
the solvent B is one or more of ethyl acetate, methyl formate, ethanol and toluene; and/or the number of the groups of groups,
the curing agent is one or more of monoisocyanate, diisocyanate and polyisocyanate.
14. The method for producing a modified tape according to claim 13, wherein the solvent B is toluene.
15. The method according to claim 1, wherein in the step S4, the mixture is applied to a thickness of 40 to 60. Mu.m.
16. A secondary battery comprising the modified tape obtained by the method for producing a modified tape according to any one of claims 1 to 15.
17. A battery module comprising the secondary battery according to claim 16.
18. A battery pack comprising the battery module of claim 17.
19. An electric device comprising at least one selected from the secondary battery according to claim 16, the battery module according to claim 17, and the battery pack according to claim 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102746800A (en) * | 2011-04-20 | 2012-10-24 | 日东电工株式会社 | Adhesive tape for electrochemical device |
| CN104004475A (en) * | 2013-02-25 | 2014-08-27 | 琳得科株式会社 | Pressure sensitive adhesion compound, pressure sensitive adhesion agent and pressure sensitive adhesion sheet |
| CN108043235A (en) * | 2017-12-20 | 2018-05-18 | 河北工业大学 | A kind of method for enhancing interfacial adhesion between organic separation membrane and backing material |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102746800A (en) * | 2011-04-20 | 2012-10-24 | 日东电工株式会社 | Adhesive tape for electrochemical device |
| CN104004475A (en) * | 2013-02-25 | 2014-08-27 | 琳得科株式会社 | Pressure sensitive adhesion compound, pressure sensitive adhesion agent and pressure sensitive adhesion sheet |
| CN108043235A (en) * | 2017-12-20 | 2018-05-18 | 河北工业大学 | A kind of method for enhancing interfacial adhesion between organic separation membrane and backing material |
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