CN110021755A - A kind of sodium-ion battery - Google Patents
A kind of sodium-ion battery Download PDFInfo
- Publication number
- CN110021755A CN110021755A CN201910309521.8A CN201910309521A CN110021755A CN 110021755 A CN110021755 A CN 110021755A CN 201910309521 A CN201910309521 A CN 201910309521A CN 110021755 A CN110021755 A CN 110021755A
- Authority
- CN
- China
- Prior art keywords
- sodium
- active material
- ion battery
- positive
- negative electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910001415 sodium ion Inorganic materials 0.000 title claims abstract description 42
- 239000011248 coating agent Substances 0.000 claims abstract description 78
- 238000000576 coating method Methods 0.000 claims abstract description 78
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 76
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 65
- 239000006258 conductive agent Substances 0.000 claims abstract description 38
- 239000011888 foil Substances 0.000 claims abstract description 33
- 239000007773 negative electrode material Substances 0.000 claims abstract description 33
- 239000007774 positive electrode material Substances 0.000 claims abstract description 33
- 239000003792 electrolyte Substances 0.000 claims abstract description 22
- 239000007767 bonding agent Substances 0.000 claims abstract description 20
- 239000005030 aluminium foil Substances 0.000 claims description 44
- 239000002904 solvent Substances 0.000 claims description 31
- 239000011734 sodium Substances 0.000 claims description 21
- 229910052708 sodium Inorganic materials 0.000 claims description 18
- 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 claims description 17
- -1 neopelex Chemical compound 0.000 claims description 12
- 159000000000 sodium salts Chemical class 0.000 claims description 11
- 239000003575 carbonaceous material Substances 0.000 claims description 9
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 claims description 9
- 239000000654 additive Substances 0.000 claims description 8
- 230000000996 additive effect Effects 0.000 claims description 8
- 239000003960 organic solvent Substances 0.000 claims description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 claims description 6
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 6
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 6
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 6
- 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 claims description 5
- 229910019142 PO4 Inorganic materials 0.000 claims description 5
- DCYOBGZUOMKFPA-UHFFFAOYSA-N iron(2+);iron(3+);octadecacyanide Chemical compound [Fe+2].[Fe+2].[Fe+2].[Fe+3].[Fe+3].[Fe+3].[Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] DCYOBGZUOMKFPA-UHFFFAOYSA-N 0.000 claims description 5
- 239000010452 phosphate Substances 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 5
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 4
- KIWBPDUYBMNFTB-UHFFFAOYSA-N Ethyl hydrogen sulfate Chemical compound CCOS(O)(=O)=O KIWBPDUYBMNFTB-UHFFFAOYSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- BYKSDPYYTJQZOA-UHFFFAOYSA-N difluoro oxalate Chemical compound FOC(=O)C(=O)OF BYKSDPYYTJQZOA-UHFFFAOYSA-N 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 4
- 229960003351 prussian blue Drugs 0.000 claims description 4
- 239000013225 prussian blue Substances 0.000 claims description 4
- JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 claims description 3
- SJHAYVFVKRXMKG-UHFFFAOYSA-N 4-methyl-1,3,2-dioxathiolane 2-oxide Chemical compound CC1COS(=O)O1 SJHAYVFVKRXMKG-UHFFFAOYSA-N 0.000 claims description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical class O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 3
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 3
- ZMVMBTZRIMAUPN-UHFFFAOYSA-H [Na+].[V+5].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O Chemical compound [Na+].[V+5].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O ZMVMBTZRIMAUPN-UHFFFAOYSA-H 0.000 claims description 3
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims description 3
- NALMPLUMOWIVJC-UHFFFAOYSA-N n,n,4-trimethylbenzeneamine oxide Chemical compound CC1=CC=C([N+](C)(C)[O-])C=C1 NALMPLUMOWIVJC-UHFFFAOYSA-N 0.000 claims description 3
- 239000001632 sodium acetate Substances 0.000 claims description 3
- 235000017281 sodium acetate Nutrition 0.000 claims description 3
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 235000017550 sodium carbonate Nutrition 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 235000002639 sodium chloride Nutrition 0.000 claims description 3
- 239000011775 sodium fluoride Substances 0.000 claims description 3
- 235000013024 sodium fluoride Nutrition 0.000 claims description 3
- 239000011697 sodium iodate Substances 0.000 claims description 3
- 235000015281 sodium iodate Nutrition 0.000 claims description 3
- 229940032753 sodium iodate Drugs 0.000 claims description 3
- 235000009518 sodium iodide Nutrition 0.000 claims description 3
- NVIFVTYDZMXWGX-UHFFFAOYSA-N sodium metaborate Chemical compound [Na+].[O-]B=O NVIFVTYDZMXWGX-UHFFFAOYSA-N 0.000 claims description 3
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 3
- 239000011684 sodium molybdate Substances 0.000 claims description 3
- 235000015393 sodium molybdate Nutrition 0.000 claims description 3
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims description 3
- 239000004317 sodium nitrate Substances 0.000 claims description 3
- 235000010344 sodium nitrate Nutrition 0.000 claims description 3
- 235000010288 sodium nitrite Nutrition 0.000 claims description 3
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 claims description 3
- 229940039790 sodium oxalate Drugs 0.000 claims description 3
- BAZAXWOYCMUHIX-UHFFFAOYSA-M sodium perchlorate Chemical compound [Na+].[O-]Cl(=O)(=O)=O BAZAXWOYCMUHIX-UHFFFAOYSA-M 0.000 claims description 3
- 229910001488 sodium perchlorate Inorganic materials 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- YLKTWKVVQDCJFL-UHFFFAOYSA-N sodium;bis(trifluoromethylsulfonyl)azanide Chemical compound [Na+].FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F YLKTWKVVQDCJFL-UHFFFAOYSA-N 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- 239000001509 sodium citrate Substances 0.000 claims description 2
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 2
- 239000001488 sodium phosphate Substances 0.000 claims description 2
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 2
- 229940048086 sodium pyrophosphate Drugs 0.000 claims description 2
- XMVONEAAOPAGAO-UHFFFAOYSA-N sodium tungstate Chemical compound [Na+].[Na+].[O-][W]([O-])(=O)=O XMVONEAAOPAGAO-UHFFFAOYSA-N 0.000 claims description 2
- KKVTYAVXTDIPAP-UHFFFAOYSA-M sodium;methanesulfonate Chemical compound [Na+].CS([O-])(=O)=O KKVTYAVXTDIPAP-UHFFFAOYSA-M 0.000 claims description 2
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 2
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 claims description 2
- 229940038773 trisodium citrate Drugs 0.000 claims description 2
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 2
- RZYKUPXRYIOEME-UHFFFAOYSA-N CCCCCCCCCCCC[S] Chemical compound CCCCCCCCCCCC[S] RZYKUPXRYIOEME-UHFFFAOYSA-N 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 239000005864 Sulphur Substances 0.000 claims 1
- 239000011149 active material Substances 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 39
- 239000002033 PVDF binder Substances 0.000 description 38
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 38
- 229910021385 hard carbon Inorganic materials 0.000 description 24
- 239000002002 slurry Substances 0.000 description 20
- 239000011230 binding agent Substances 0.000 description 19
- 229910021312 NaFePO4 Inorganic materials 0.000 description 17
- 230000006872 improvement Effects 0.000 description 11
- 239000010450 olivine Substances 0.000 description 8
- 229910052609 olivine Inorganic materials 0.000 description 8
- 102220043159 rs587780996 Human genes 0.000 description 8
- 239000002041 carbon nanotube Substances 0.000 description 6
- 229910021393 carbon nanotube Inorganic materials 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 4
- 239000006230 acetylene black Substances 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 3
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 3
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 3
- 229910020657 Na3V2(PO4)3 Inorganic materials 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- SIXOAUAWLZKQKX-UHFFFAOYSA-N carbonic acid;prop-1-ene Chemical compound CC=C.OC(O)=O SIXOAUAWLZKQKX-UHFFFAOYSA-N 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 3
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- XPDWGBQVDMORPB-UHFFFAOYSA-N Fluoroform Chemical compound FC(F)F XPDWGBQVDMORPB-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 239000006183 anode active material Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000003273 ketjen black Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 229910001495 sodium tetrafluoroborate Inorganic materials 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- OXHNLMTVIGZXSG-UHFFFAOYSA-N 1-Methylpyrrole Chemical compound CN1C=CC=C1 OXHNLMTVIGZXSG-UHFFFAOYSA-N 0.000 description 1
- 239000005955 Ferric phosphate Substances 0.000 description 1
- CFVBFMMHFBHNPZ-UHFFFAOYSA-N [Na].[V] Chemical compound [Na].[V] CFVBFMMHFBHNPZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- IYRWEQXVUNLMAY-UHFFFAOYSA-N carbonyl fluoride Chemical compound FC(F)=O IYRWEQXVUNLMAY-UHFFFAOYSA-N 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 229940032958 ferric phosphate Drugs 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- DWNWZFAKFWMPTI-UHFFFAOYSA-N methanesulfonic acid;sodium Chemical compound [Na].CS(O)(=O)=O DWNWZFAKFWMPTI-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000011008 sodium phosphates Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
-
- 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
- H01M10/058—Construction or manufacture
-
- 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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
-
- 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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention belongs to battery technology fields, more particularly to a kind of sodium-ion battery, including positive plate, negative electrode tab, diaphragm and electrolyte, the positive plate includes plus plate current-collecting body and the positive electrode active material layer coated on a plus plate current-collecting body at least surface, the negative electrode tab includes negative current collector and the negative electrode active material layer coated on a negative current collector at least surface, it is characterised in that: the plus plate current-collecting body and the negative current collector include foil layer and the carbon coating coated on two surface of foil layer.Compared with the prior art, collector of the invention is also provided with carbon coating on the basis of foil layer, on the one hand, the accounting for reducing bonding agent and conductive agent improves the energy density of battery, on the other hand, the cementability of active material layer and collector is improved, positive and negative anodes is reduced and drops off problem.
Description
Technical field
The invention belongs to battery technology field more particularly to a kind of sodium-ion batteries.
Background technique
With the continuous development of energy storage system, the demand of lithium is greatly increased, but lithium resource reserves are limited, seriously constrain
Application of the lithium ion battery in terms of extensive energy storage.For lithium ion battery, sodium resource abundant keeps sodium ion electric
Pond is considered as one of the optimal selection of next-generation extensive energy storage technology.
However since biggish sodium ion radius is unfavorable for its deintercalation in host material, low sodium-ion battery energy
Density and power density are to limit the major issue of its development.Energy and power of the selection of electrode material and electrolyte to battery
The performances such as density play decisive role.However, current research, which is still difficult to provide, takes into account high-energy, high power density and circulation
The sodium ion full battery system of stability.If the patent of patent CN109088068A discloses a kind of sodium-ion battery, electrolysis
Charge/radius ratio of the cation of solution additive is less than charge/radius ratio of sodium ion, and active material of cathode includes Prussian blue
Class material, so that sodium-ion battery has good cycle performance.However, in the technical scheme, either cathode sheets are still
Anode strip, wherein the accounting of conductive agent and bonding agent is relatively high, not only greatly reduces the energy density of battery, but also be easy
Cause active material to be detached from collector or reduces material high rate performance.
Summary of the invention
It is an object of the invention to: in view of the deficiencies of the prior art, and a kind of sodium-ion battery is provided, it is close to improve energy
Degree, while reducing positive and negative anodes and dropping off problem.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of sodium-ion battery, including positive plate, negative electrode tab, diaphragm and electrolyte, the positive plate include anode collection
Fluid and positive electrode active material layer coated on a plus plate current-collecting body at least surface, the negative electrode tab includes negative pole currect collecting
Body and negative electrode active material layer coated on a negative current collector at least surface, the plus plate current-collecting body and the cathode
Collector includes foil layer and the carbon coating coated on two surface of foil layer.
As a kind of improvement of sodium-ion battery of the present invention, the foil layer is aluminium foil, the thickness of the foil layer
Degree is 6~20 μm.The thickness of foil layer is too small not to have the effect for collecting electric current well, and the thickness of foil layer crosses conference increasing
It is powered on integral thickness, volume and the quality in pond, not only reduces the energy density of battery, but also is not able to satisfy now light to battery
The demand of change.
As a kind of improvement of sodium-ion battery of the present invention, the single side of the carbon coating with a thickness of 0.5~3 μm,
The single side surface density of the carbon coating is 0.5~2.0g/m2.The surface density of carbon coating is too small, and the thickness of carbon coating is also just corresponding
It is thinning, improvement result can not had, and the surface density of carbon coating is excessive, the thickness of carbon coating also just thickens accordingly, can drop
The energy density of low battery increases the weight of battery.
As a kind of improvement of sodium-ion battery of the present invention, the carbon coating is made of conductive carbon material.Apply carbon
The conductive carbon materials such as layer preferably conductive nano graphite, carbon coating particle, carbon nanotube.
As a kind of improvement of sodium-ion battery of the present invention, by mass percentage, the positive electrode active material layer
Including 90%~99% positive active material, 0.5%~8% positive bonding agent and 0.5%~8% positive conductive agent.
On the one hand, due to being provided with the carbon coating containing conductive carbon material in plus plate current-collecting body, containing for positive conductive agent can be reduced
Amount；On the other hand, since positive electrode active material layer is more bonding with foil layer than positive electrode active material layer with the cementability of carbon coating
Property is good, therefore, can reduce the dosage of positive bonding agent.To sum up, due to being provided with carbon coating, reduce positive bonding agent and anode
The content of conductive agent not only increases the accounting of positive active material, improves the energy density of battery, and improves activity
The cementability of substance and collector reduces anode and drops off problem.
As a kind of improvement of sodium-ion battery of the present invention, the positive electrode active materials include phosphoric acid ferrisodium, phosphorus
At least one of sour vanadium sodium and prussian blue positive electrode.
As a kind of improvement of sodium-ion battery of the present invention, by mass percentage, the negative electrode active material layer
Including 92%~99.5% negative electrode active material, 0.2%~6% cathode bonding agent and 0.2%~6% negative conductive
Agent.On the one hand, due to being provided with the carbon coating containing conductive carbon material in negative current collector, cathode conductive agent can be reduced
Content；On the other hand, since the cementability of negative electrode active material layer and carbon coating is than negative electrode active material layer and foil layer
Cementability is good, therefore, can reduce the dosage of cathode bonding agent.To sum up, due to be provided with carbon coating, reduce cathode bonding agent and
The content of cathode conductive agent not only increases the accounting of negative electrode active material, improves the energy density of battery, and improves
The cementability of active material and collector reduces cathode and drops off problem.
As a kind of improvement of sodium-ion battery of the present invention, the negative electrode active material is agraphitic carbon.Without fixed
Type carbon includes but is not limited to spherical hard carbon, sheet hard carbon.
As a kind of improvement of sodium-ion battery of the present invention, the electrolyte includes organic solvent and sodium salt, institute
Stating organic solvent includes esters solvent and/or ether solvent, it is preferred that the organic solvent includes propene carbonate, carbonic acid two
At least one of methyl esters, diethyl carbonate, methyl ethyl carbonate, glycol dimethyl ether and diethylene glycol dimethyl ether；The sodium salt
Including sodium hexafluoro phosphate, sodium chloride, sodium fluoride, sodium sulphate, sodium carbonate, sodium phosphate, sodium nitrate, difluoro oxalate Boratex, burnt phosphorus
Sour sodium, neopelex, lauryl sodium sulfate, trisodium citrate, kodalk, Boratex, sodium molybdate, wolframic acid
Sodium, sodium bromide, sodium nitrite, sodium iodate, sodium iodide, sodium metasilicate, sodium lignin sulfonate, sodium oxalate, sodium aluminate, methane sulfonic acid
Sodium, sodium acetate, sodium dichromate, hexafluoroarsenate sodium, sodium tetrafluoroborate, sodium perchlorate, trifluoromethanesulfonimide sodium and fluoroform
At least one of alkyl sulfonic acid sodium.
As a kind of improvement of sodium-ion battery of the present invention, the electrolyte further includes additive, the addition
Agent includes fluorinated ethylene carbonate, 1,2- difluorinated ethylene carbonate, ethyl sulfate, propylene sulfite and vinylene carbonate
At least one of ester, the mass content of the additive account for the 0.1~15% of the electrolyte quality.
Compared with the prior art, the present invention at least has the advantages that
1) carbon coating is arranged in collector of the invention on the basis of traditional foil layer, contains conductive carbon material in carbon coating
Material is born in positive conductive agent and negative electrode active material layer with electric action to can be reduced in positive electrode active material layer
The content of pole conductive agent to improve the accounting of positive electrode active materials and negative electrode active material, and then improves sodium-ion battery
Energy density.
2) carbon coating is arranged on the basis of traditional foil layer in collector of the invention, compared to foil layer, carbon coating with
Positive bonding agent in positive electrode active material layer and the cathode bonding agent in negative electrode active material layer have a better cementability, and one
Aspect can be reduced the content of positive bonding agent and cathode bonding agent, improve the accounting of positive electrode active materials and negative electrode active material,
The energy density of sodium-ion battery is improved, on the other hand, can improve positive plate and the problem of negative electrode tab drops off, preferably protect
Collector.
Detailed description of the invention
Fig. 1 is one of the structural schematic diagram of positive or negative pole in the present invention.
Fig. 2 is the second structural representation of positive or negative pole in the present invention.
Wherein: 1- plus plate current-collecting body, 2- anode active material layer, 3- negative current collector, 4- anode active material layer, 5- foil
Material layer, 6- carbon coating.
Specific embodiment
A kind of sodium-ion battery, including positive plate, negative electrode tab, diaphragm and electrolyte, positive plate include plus plate current-collecting body 1
And the positive electrode active material layer 2 coated on at least surface of plus plate current-collecting body 1, negative electrode tab include negative current collector 3 and apply
It is overlying on the negative electrode active material layer 4 on at least surface of negative current collector 3, plus plate current-collecting body 1 and negative current collector 3 include foil
Layer 5 and the carbon coating 6 coated on 5 liang of surfaces of foil layer.
Specifically, as shown in Figure 1, positive electrode active material layer 2 is coated on the one side or negative electrode active material of plus plate current-collecting body 1
Matter layer 3 is coated on the one side of negative current collector 4.As shown in Fig. 2, positive electrode active material layer 2 is coated on the two of plus plate current-collecting body 1
Face or negative electrode active material layer 4 are coated on the two sides of negative current collector 3.
Further, foil layer 5 be aluminium foil, foil layer 5 with a thickness of 6~20 μm.
Further, the single side of carbon coating 6 is with a thickness of 0.5~3 μm.The single side surface density of carbon coating 6 is 0.5~2.0g/
m2。
Further, carbon coating 6 is made of conductive carbon material.The preferred conductive nano graphite of carbon coating 6, carbon coating particle,
The conductive carbon materials such as carbon nanotube.
Further, by mass percentage, positive electrode active material layer 2 includes 90%~99% positive active material,
0.5%~8% positive bonding agent and 0.5%~8% positive conductive agent.Preferably, positive electrode active materials include ferric phosphate
Sodium NaFePO4, vanadium phosphate sodium Na3V2(PO4)3With prussian blue positive electrode NaxMFe(CN)6(x >=1, M=Mn, Fe, Co,
At least one of Ni, Zn)；Positive bonding agent is PVDF, and positive conductive agent includes conductive black, carbon nanotube, acetylene black, carbon
At least one of fiber and Ketjen black.
Further, by mass percentage, negative electrode active material layer 4 includes 92%~99.5% negative electrode active material,
0.2%~6% cathode bonding agent and 0.2%~6% cathode conductive agent.Negative electrode active material is agraphitic carbon.It is described negative
Pole bonding agent is PVDF or CMC, and the cathode conductive agent includes conductive black, carbon nanotube, acetylene black, carbon fiber and Ketjen black
At least one of.
Further, electrolyte includes organic solvent and sodium salt, and organic solvent includes esters solvent and/or ether solvent,
Preferably, organic solvent include propene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, glycol dimethyl ether and
At least one of diethylene glycol dimethyl ether；Sodium salt includes sodium hexafluoro phosphate, sodium chloride, sodium fluoride, sodium sulphate, sodium carbonate, phosphorus
Sour sodium, sodium nitrate, difluoro oxalate Boratex, sodium pyrophosphate, neopelex, lauryl sodium sulfate, citric acid three
Sodium, kodalk, Boratex, sodium molybdate, sodium tungstate, sodium bromide, sodium nitrite, sodium iodate, sodium iodide, sodium metasilicate, lignin
Sodium sulfonate, sodium oxalate, sodium aluminate, sodium methanesulfonate, sodium acetate, sodium dichromate, hexafluoroarsenate sodium, sodium tetrafluoroborate, perchloric acid
At least one of sodium, trifluoromethanesulfonimide sodium and trifluoromethayl sulfonic acid sodium.
Further, electrolyte further includes additive, and additive includes fluorinated ethylene carbonate, 1,2-, bis- fluoro carbonic acid second
At least one of enester, ethyl sulfate, propylene sulfite and vinylene carbonate, the mass content of additive account for described
The 0.1~15% of electrolyte quality.
The present invention is described in further detail With reference to embodiment, but embodiments of the present invention are not
It is limited to this.
Embodiment 1
Positive plate: the aluminium foil that plus plate current-collecting body is selected with a thickness of 6 μm, and in the two sides of aluminium foil coating single side with a thickness of 0.5 μ
M, single side surface density is 0.5g/m2Carbon coating；Positive electrode active materials select olivine structural NaFePO4, conductive agent selection Sup-
P conductive black, binder are selected PVDF, are formulated as NaFePO4: three is passed through N- by PVDF:Sup-p=90%:4%:6%
The mixing of methyl pyrrolidone (NMP) solvent is tuned into slurry even application on plus plate current-collecting body.
Negative electrode tab: the aluminium foil that negative current collector is selected with a thickness of 6 μm, and in the two sides of aluminium foil coating single side with a thickness of 0.5 μ
M, single side surface density is 0.5g/m2Carbon coating；Negative electrode active material selects spherical hard carbon, D50=8~10 μm, conductive agent choosing
With Sup-p conductive black, binder is selected PVDF, is formulated as spherical hard carbon: PVDF:Sup-p=97%:2%:1%, by three
Slurry even application is tuned on a current collector by the mixing of N-Methyl pyrrolidone (NMP) solvent.
Electrolyte: solvent selects dimethyl carbonate, and sodium salt selects the sodium hexafluoro phosphate of 1mol/L, adds 2% fluoro carbon
Vinyl acetate.
Diaphragm: select PE film as diaphragm.
Battery core is prepared by winding to above-mentioned positive plate, negative electrode tab, diaphragm, is then encapsulated with plastic-aluminum shell, is injected later
Above-mentioned electrolyte obtains sodium-ion battery using high temperature forming and capacity dividing.
Embodiment 2
Unlike the first embodiment:
Positive plate: the aluminium foil that plus plate current-collecting body is selected with a thickness of 10 μm, and in the two sides of aluminium foil coating single side with a thickness of 1 μ
M, single side surface density is 1.0g/m2Carbon coating；Positive electrode active materials select olivine structural NaFePO4, conductive agent selection Sup-
P conductive black, binder are selected PVDF, are formulated as NaFePO4: three is passed through N- by PVDF:Sup-p=90%:4%:6%
The mixing of methyl pyrrolidone (NMP) solvent is tuned into slurry even application on plus plate current-collecting body.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 3
Unlike the first embodiment:
Positive plate: the aluminium foil that plus plate current-collecting body is selected with a thickness of 12 μm, and in the two sides of aluminium foil coating single side with a thickness of 1.5
μm, single side surface density be 1.2g/m2Carbon coating；Positive electrode active materials select olivine structural NaFePO4, conductive agent selection
Sup-p conductive black, binder are selected PVDF, are formulated as NaFePO4: PVDF:Sup-p=90%:4%:6% leads to three
It crosses the mixing of N-Methyl pyrrolidone (NMP) solvent and is tuned into slurry even application on plus plate current-collecting body.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 4
Unlike the first embodiment:
Positive plate: the aluminium foil that plus plate current-collecting body is selected with a thickness of 15 μm, and in the two sides of aluminium foil coating single side with a thickness of 2 μ
M, single side surface density is 1.5g/m2Carbon coating；Positive electrode active materials select olivine structural NaFePO4, conductive agent selection Sup-
P conductive black, binder are selected PVDF, are formulated as NaFePO4: three is passed through N- by PVDF:Sup-p=90%:4%:6%
The mixing of methyl pyrrolidone (NMP) solvent is tuned into slurry even application on plus plate current-collecting body.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 5
Unlike the first embodiment:
Positive plate: the aluminium foil that plus plate current-collecting body is selected with a thickness of 20 μm, and in the two sides of aluminium foil coating single side with a thickness of 3 μ
M, single side surface density is 2.0g/m2Carbon coating；Positive electrode active materials select olivine structural NaFePO4, conductive agent selection Sup-
P conductive black, binder are selected PVDF, are formulated as NaFePO4: three is passed through N- by PVDF:Sup-p=90%:4%:6%
The mixing of methyl pyrrolidone (NMP) solvent is tuned into slurry even application on plus plate current-collecting body.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 6
Unlike the first embodiment:
Positive plate: the aluminium foil that plus plate current-collecting body is selected with a thickness of 4 μm, and in the two sides of aluminium foil coating single side with a thickness of 0.3 μ
M, single side surface density is 0.3g/m2Carbon coating；Positive electrode active materials select olivine structural NaFePO4, conductive agent selection Sup-
P conductive black, binder are selected PVDF, are formulated as NaFePO4: three is passed through N- by PVDF:Sup-p=90%:4%:6%
The mixing of methyl pyrrolidone (NMP) solvent is tuned into slurry even application on plus plate current-collecting body.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 7
Unlike the first embodiment:
Positive plate: the aluminium foil that plus plate current-collecting body is selected with a thickness of 22 μm, and in the two sides of aluminium foil coating single side with a thickness of 4 μ
M, single side surface density is 2.5g/m2Carbon coating；Positive electrode active materials select olivine structural NaFePO4, conductive agent selection Sup-
P conductive black, binder are selected PVDF, are formulated as NaFePO4: three is passed through N- by PVDF:Sup-p=90%:4%:6%
The mixing of methyl pyrrolidone (NMP) solvent is tuned into slurry even application on plus plate current-collecting body.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 8
Unlike the first embodiment:
Positive plate: the aluminium foil that plus plate current-collecting body is selected with a thickness of 6 μm, and in the two sides of aluminium foil coating single side with a thickness of 0.5 μ
M, single side surface density is 0.5g/m2Carbon coating；Positive electrode active materials select vanadium phosphate sodium Na3V2(PO4)3, conductive agent selection carbon
Nanotube, binder are selected PVDF, are formulated as Na3V2(PO4)3: PVDF: carbon nanotube=95%:2%:3% passes through three
The mixing of N-Methyl pyrrolidone (NMP) solvent is tuned into slurry even application on plus plate current-collecting body.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 9
Unlike the first embodiment:
Positive plate: the aluminium foil that plus plate current-collecting body is selected with a thickness of 6 μm, and in the two sides of aluminium foil coating single side with a thickness of 0.5 μ
M, single side surface density is 0.5g/m2Carbon coating；Positive electrode active materials select prussian blue positive electrode Na1.72MnFe
(CN)6, conductive agent select acetylene black, binder select PVDF, be formulated as Na1.72MnFe(CN)6: PVDF: acetylene black=99%:
Three is mixed by N-Methyl pyrrolidone (NMP) solvent and is tuned into slurry even application in plus plate current-collecting body by 0.5%:0.5%
On.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 10
Unlike the first embodiment:
Negative electrode tab: the aluminium foil that negative current collector is selected with a thickness of 10 μm, and in the two sides of aluminium foil coating single side with a thickness of 1 μ
M, single side surface density is 1.0g/m2Carbon coating；Negative electrode active material selects spherical hard carbon, D50=8~10 μm, conductive agent choosing
With Sup-p conductive black, binder is selected PVDF, is formulated as spherical hard carbon: PVDF:Sup-p=97%:2%:1%, by three
Slurry even application is tuned on a current collector by the mixing of N-Methyl pyrrolidone (NMP) solvent.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 11
Unlike the first embodiment:
Negative electrode tab: the aluminium foil that negative current collector is selected with a thickness of 12 μm, and in the two sides of aluminium foil coating single side with a thickness of 1 μ
M, single side surface density is 1.0g/m2Carbon coating；Negative electrode active material selects spherical hard carbon, D50=8~10 μm, conductive agent choosing
With Sup-p conductive black, binder is selected PVDF, is formulated as spherical hard carbon: PVDF:Sup-p=97%:2%:1%, by three
Slurry even application is tuned on a current collector by the mixing of N-Methyl pyrrolidone (NMP) solvent.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 12
Unlike the first embodiment:
Negative electrode tab: the aluminium foil that negative current collector is selected with a thickness of 15 μm, and in the two sides of aluminium foil coating single side with a thickness of 2 μ
M, single side surface density is 1.5g/m2Carbon coating；Negative electrode active material selects spherical hard carbon, D50=8~10 μm, conductive agent choosing
With Sup-p conductive black, binder is selected PVDF, is formulated as spherical hard carbon: PVDF:Sup-p=97%:2%:1%, by three
Slurry even application is tuned on a current collector by the mixing of N-Methyl pyrrolidone (NMP) solvent.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 13
Unlike the first embodiment:
Negative electrode tab: the aluminium foil that negative current collector is selected with a thickness of 20 μm, and in the two sides of aluminium foil coating single side with a thickness of 3 μ
M, single side surface density is 2.0g/m2Carbon coating；Negative electrode active material selects spherical hard carbon, D50=8~10 μm, conductive agent choosing
With Sup-p conductive black, binder is selected PVDF, is formulated as spherical hard carbon: PVDF:Sup-p=97%:2%:1%, by three
Slurry even application is tuned on a current collector by the mixing of N-Methyl pyrrolidone (NMP) solvent.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 14
Unlike the first embodiment:
Negative electrode tab: the aluminium foil that negative current collector is selected with a thickness of 4 μm, and in the two sides of aluminium foil coating single side with a thickness of 0.3 μ
M, single side surface density is 0.3g/m2Carbon coating；Negative electrode active material selects spherical hard carbon, D50=8~10 μm, conductive agent choosing
With Sup-p conductive black, binder is selected PVDF, is formulated as spherical hard carbon: PVDF:Sup-p=97%:2%:1%, by three
Slurry even application is tuned on a current collector by the mixing of N-Methyl pyrrolidone (NMP) solvent.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 15
Unlike the first embodiment:
Negative electrode tab: the aluminium foil that negative current collector is selected with a thickness of 22 μm, and in the two sides of aluminium foil coating single side with a thickness of 3.5
μm, single side surface density be 2.5g/m2Carbon coating；Negative electrode active material selects spherical hard carbon, D50=8~10 μm, conductive agent choosing
With Sup-p conductive black, binder is selected PVDF, is formulated as spherical hard carbon: PVDF:Sup-p=97%:2%:1%, by three
Slurry even application is tuned on a current collector by the mixing of N-Methyl pyrrolidone (NMP) solvent.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 16
Unlike the first embodiment:
Negative electrode tab: the aluminium foil that negative current collector is selected with a thickness of 6 μm, and in the two sides of aluminium foil coating single side with a thickness of 0.5 μ
M, single side surface density is 0.5g/m2Carbon coating；Negative electrode active material selects sheet hard carbon, and conductive agent selects carbon fiber, bonding
CMC is selected in agent, is formulated as sheet hard carbon: CMC: three is passed through N- methylpyrrole by carbon fiber=99.5%:0.3%:0.2%
The mixing of alkanone (NMP) solvent is tuned into slurry even application on a current collector.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 17
Unlike the first embodiment:
Negative electrode tab: the aluminium foil that negative current collector is selected with a thickness of 6 μm, and in the two sides of aluminium foil coating single side with a thickness of 0.5 μ
M, single side surface density is 0.5g/m2Carbon coating；Negative electrode active material selects ball-type hard carbon and sheet hard carbon, conductive agent selection section
Qin is black, and binder selects CMC, is formulated as (ball-type hard carbon+sheet hard carbon): CMC: carbon fiber=92%:5%:3%, by three
Slurry even application is tuned on a current collector by the mixing of N-Methyl pyrrolidone (NMP) solvent.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 18
Unlike the first embodiment:
Electrolyte: solvent selects propene carbonate and diethyl carbonate, and sodium salt selects the trifluoromethayl sulfonic acid sodium of 1mol/L,
The ethyl sulfate of addition 5%.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 19
Unlike the first embodiment:
Electrolyte: solvent selects glycol dimethyl ether, and sodium salt selects the difluoro oxalate Boratex of 1mol/L, addition 0.1%
1,2- difluorinated ethylene carbonate.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 20
Unlike the first embodiment:
Electrolyte: solvent selects methyl ethyl carbonate and diethylene glycol dimethyl ether, and sodium salt is selected the sodium perchlorate of 1mol/L, added
Add 15% vinylene carbonate.
Remaining is with embodiment 1, and which is not described herein again.
Comparative example 1
Positive plate: the aluminium foil that plus plate current-collecting body is selected with a thickness of 6 μm；Positive electrode active materials select olivine structural
NaFePO4, conductive agent select Sup-p conductive black, binder select PVDF, be formulated as NaFePO4: PVDF:Sup-p=80%:
Three is mixed by N-Methyl pyrrolidone (NMP) solvent and is tuned into slurry even application in plus plate current-collecting body by 10%:10%
On.
Negative electrode tab: the aluminium foil that negative current collector is selected with a thickness of 6 μm；Negative electrode active material selects spherical hard carbon, D50=8
~10 μm, conductive agent selects Sup-p conductive black, and binder is selected PVDF, is formulated as spherical hard carbon: PVDF:Sup-p=
Three is mixed by N-Methyl pyrrolidone (NMP) solvent and is tuned into slurry even application on a current collector by 88%:8%:4%.
Electrolyte: solvent selects dimethyl carbonate, and sodium salt selects the sodium hexafluoro phosphate of 1mol/L, adds 2% fluoro carbon
Vinyl acetate.
Diaphragm: select PE film as diaphragm.
Battery core is prepared by winding to above-mentioned positive plate, negative electrode tab, diaphragm, is then encapsulated with plastic-aluminum shell, is injected later
Above-mentioned electrolyte obtains sodium-ion battery using high temperature forming and capacity dividing.
Performance test
Battery made from Examples 1 to 20 and comparative example 1 is tested for the property, concrete outcome is shown in Table 1.
1 the performance test results of table
As can be seen from Table 1, its energy density of sodium-ion battery of the invention is higher than directly using aluminium foil as collector
The energy density of sodium-ion battery, and the high rate performance of sodium-ion battery of the invention is better than directly using aluminium foil as collector
Sodium ion high rate performance.This is because collector of the invention includes foil layer and the two sides for being set to foil layer
Carbon coating, on the one hand, containing having plenty of conductive carbon material in carbon coating, the dosage of conductive agent in active material layer can be reduced, separately
On the one hand, the cementability of active material layer and carbon coating is better than the cementability of active material layer and foil layer, so as to reduce work
The dosage of bonding agent in property material layer, that is to say, that present invention reduces the accounting of conductive agent in active material layer and bonding agent,
The accounting of active material is improved, thus the energy density of the battery improved.In addition, since active material layer is bonding with carbon coating
Property it is preferable, to reduce dropping off for positive plate and negative electrode tab, so that positive plate and negative electrode tab have good interface, Jin Erti
The high high rate performance of battery.
Specifically, aluminium foil and painting of the foil layer it can be seen from Examples 1 to 7 comparison when positive plate with a thickness of 12 μm
The single side of carbon-coating is 1.2g/m with a thickness of 1.5 μm, single side surface density2When (embodiment 3), the performance of battery is best；And when anode
When the thickness of the foil layer of piece is excessively thin and single side thickness and single side surface density too small (embodiment 6) of carbon coating, the property of battery
It can be poor；Similarly, when the thickness of the foil layer of positive plate is excessively thin and the single side thickness of carbon coating and single side surface density are too small
When (embodiment 7), the performance of battery is poor.
Similarly, by embodiment 1, the comparison of embodiment 10~15 it is found that working as the foil layer of negative electrode tab with a thickness of 15 μm of aluminium
The single side of foil and carbon coating is 1.5g/m with a thickness of 2 μm, single side surface density2When (embodiment 12), the performance of battery is best；And work as
When the thickness of the foil layer of negative electrode tab is excessively thin and single side thickness and single side surface density too small (embodiment 14) of carbon coating, battery
Performance it is poor；Similarly, when the thickness of the foil layer of negative electrode tab is excessively thin and the single side thickness and single side surface density of carbon coating
When too small (embodiment 15), the performance of battery is poor.
In addition to this, positive electrode active material cited in the present invention is selected it can be seen from embodiment 1,8~9,16~20
Matter, negative electrode active material and electrolyte, and within the scope of the invention by the control of the accounting of each component, obtain sodium ion
The energy density of battery is attained by 150Wh/kg or more, and high rate performance is also more excellent.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to above-mentioned specific embodiment, all those skilled in the art exist
Made any conspicuous improvement, replacement or modification all belong to the scope of protection of the present invention on the basis of the present invention.This
Outside, although using some specific terms in this specification, these terms are merely for convenience of description, not to the present invention
Constitute any restrictions.
Claims (10)
1. a kind of sodium-ion battery, including positive plate, negative electrode tab, diaphragm and electrolyte, the positive plate include anode collection
Body and positive electrode active material layer coated on a plus plate current-collecting body at least surface, the negative electrode tab includes negative current collector
And the negative electrode active material layer coated on a negative current collector at least surface, it is characterised in that: the plus plate current-collecting body
It include foil layer and carbon coating coated on two surface of foil layer with the negative current collector.
2. sodium-ion battery according to claim 1, it is characterised in that: the foil layer is aluminium foil, the foil layer
With a thickness of 6~20 μm.
3. sodium-ion battery according to claim 1, it is characterised in that: the single side of the carbon coating is with a thickness of 0.5~3 μ
M, the single side surface density of the carbon coating are 0.5~2.0g/m2。
4. sodium-ion battery according to claim 1, it is characterised in that: the carbon coating is made of conductive carbon material.
5. sodium-ion battery according to claim 1, it is characterised in that: by mass percentage, the positive active material
Layer includes 90%~99% positive active material, 0.5%~8% positive bonding agent and 0.5%~8% positive conductive
Agent.
6. sodium-ion battery according to claim 5, it is characterised in that: the positive electrode active materials include phosphoric acid ferrisodium,
At least one of vanadium phosphate sodium and prussian blue positive electrode.
7. sodium-ion battery according to claim 1, it is characterised in that: by mass percentage, the negative electrode active material
Layer includes 92%~99.5% negative electrode active material, 0.2%~6% cathode bonding agent and 0.2%~6% negative conductive
Agent.
8. sodium-ion battery according to claim 7, it is characterised in that: the negative electrode active material is agraphitic carbon.
9. sodium-ion battery according to claim 1, it is characterised in that: the electrolyte includes organic solvent and sodium salt,
The organic solvent includes esters solvent and/or ether solvent, and the sodium salt includes sodium hexafluoro phosphate, sodium chloride, sodium fluoride, sulphur
Sour sodium, sodium carbonate, sodium phosphate, sodium nitrate, difluoro oxalate Boratex, sodium pyrophosphate, neopelex, dodecyl sulphur
Sour sodium, trisodium citrate, kodalk, Boratex, sodium molybdate, sodium tungstate, sodium bromide, sodium nitrite, sodium iodate, sodium iodide,
Sodium metasilicate, sodium lignin sulfonate, sodium oxalate, sodium aluminate, sodium methanesulfonate, sodium acetate, sodium dichromate, hexafluoroarsenate sodium, tetrafluoro
At least one of Boratex, sodium perchlorate, trifluoromethanesulfonimide sodium and trifluoromethayl sulfonic acid sodium.
10. sodium-ion battery according to claim 9, it is characterised in that: the electrolyte further includes additive, described to add
Adding agent includes fluorinated ethylene carbonate, 1,2- difluorinated ethylene carbonate, ethyl sulfate, propylene sulfite and carbonic acid Asia second
At least one of enester, the mass content of the additive account for the 0.1~15% of the electrolyte quality.
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| CN113437356A (en) * | 2021-06-26 | 2021-09-24 | 宁德时代新能源科技股份有限公司 | Flat-plate sodium metal battery and electrochemical device |
| CN113991089A (en) * | 2021-11-11 | 2022-01-28 | 雅迪科技集团有限公司 | Sodium ion battery and preparation method thereof |
| CN114156473A (en) * | 2021-12-06 | 2022-03-08 | 深圳市启明新能源科技有限公司 | Sodium ion battery and manufacturing method thereof |
| CN114520311A (en) * | 2022-02-07 | 2022-05-20 | 大连中比动力电池有限公司 | Negative pole piece for sodium ion battery, preparation method of negative pole piece and sodium ion battery |
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| CN116742129A (en) * | 2023-07-13 | 2023-09-12 | 华南师范大学 | Electrolyte for sodium ion battery and sodium ion battery |
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| CN114520311A (en) * | 2022-02-07 | 2022-05-20 | 大连中比动力电池有限公司 | Negative pole piece for sodium ion battery, preparation method of negative pole piece and sodium ion battery |
| CN114843524A (en) * | 2022-06-17 | 2022-08-02 | 珠海冠宇电池股份有限公司 | Modified current collector and non-negative sodium metal battery comprising same |
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