CN106784790A - 一种镍钴锰酸锂三元正极材料的制备方法 - Google Patents
一种镍钴锰酸锂三元正极材料的制备方法 Download PDFInfo
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- CN106784790A CN106784790A CN201611244829.1A CN201611244829A CN106784790A CN 106784790 A CN106784790 A CN 106784790A CN 201611244829 A CN201611244829 A CN 201611244829A CN 106784790 A CN106784790 A CN 106784790A
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- Prior art keywords
- lithium
- cobalt
- source
- nickel
- manganese
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- OVAQODDUFGFVPR-UHFFFAOYSA-N lithium cobalt(2+) dioxido(dioxo)manganese Chemical compound [Li+].[Mn](=O)(=O)([O-])[O-].[Co+2] OVAQODDUFGFVPR-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000010406 cathode material Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 25
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 23
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011572 manganese Substances 0.000 claims abstract description 18
- 239000000243 solution Substances 0.000 claims abstract description 17
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 15
- 239000010941 cobalt Substances 0.000 claims abstract description 15
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011259 mixed solution Substances 0.000 claims abstract description 12
- 150000001875 compounds Chemical class 0.000 claims abstract description 11
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 11
- 238000007710 freezing Methods 0.000 claims abstract description 10
- 230000008014 freezing Effects 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000012467 final product Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 238000005406 washing Methods 0.000 claims abstract description 5
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 18
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 15
- 229940039748 oxalate Drugs 0.000 claims description 13
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 7
- 229940011182 cobalt acetate Drugs 0.000 claims description 7
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 claims description 7
- 239000011975 tartaric acid Substances 0.000 claims description 7
- 235000002906 tartaric acid Nutrition 0.000 claims description 7
- MQRWBMAEBQOWAF-UHFFFAOYSA-N acetic acid;nickel Chemical compound [Ni].CC(O)=O.CC(O)=O MQRWBMAEBQOWAF-UHFFFAOYSA-N 0.000 claims description 6
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 claims description 6
- 229940078494 nickel acetate Drugs 0.000 claims description 6
- 239000011668 ascorbic acid Substances 0.000 claims description 5
- 229960005070 ascorbic acid Drugs 0.000 claims description 5
- 235000010323 ascorbic acid Nutrition 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 5
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 claims description 5
- 229910001981 cobalt nitrate Inorganic materials 0.000 claims description 5
- XIXADJRWDQXREU-UHFFFAOYSA-M lithium acetate Chemical compound [Li+].CC([O-])=O XIXADJRWDQXREU-UHFFFAOYSA-M 0.000 claims description 5
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 5
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 5
- 229940071125 manganese acetate Drugs 0.000 claims description 5
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 claims description 5
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 claims description 5
- 229940039790 sodium oxalate Drugs 0.000 claims description 5
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 claims description 4
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 4
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 4
- VBIXEXWLHSRNKB-UHFFFAOYSA-N ammonium oxalate Chemical compound [NH4+].[NH4+].[O-]C(=O)C([O-])=O VBIXEXWLHSRNKB-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(2+);cobalt(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 claims description 4
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 claims description 4
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 4
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- VAIVGJYVKZVQAA-UHFFFAOYSA-N 2-hydroxypropane-1,2,3-tricarboxylic acid;nickel Chemical compound [Ni].OC(=O)CC(O)(C(O)=O)CC(O)=O VAIVGJYVKZVQAA-UHFFFAOYSA-N 0.000 claims description 3
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 3
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 claims description 3
- QXOLLBTXUCQAEQ-UHFFFAOYSA-N cobalt;2-hydroxypropane-1,2,3-tricarboxylic acid Chemical compound [Co].OC(=O)CC(O)(C(O)=O)CC(O)=O QXOLLBTXUCQAEQ-UHFFFAOYSA-N 0.000 claims description 3
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims description 3
- DOLZKNFSRCEOFV-UHFFFAOYSA-L nickel(2+);oxalate Chemical compound [Ni+2].[O-]C(=O)C([O-])=O DOLZKNFSRCEOFV-UHFFFAOYSA-L 0.000 claims description 3
- 235000006408 oxalic acid Nutrition 0.000 claims description 3
- OAVRWNUUOUXDFH-UHFFFAOYSA-H 2-hydroxypropane-1,2,3-tricarboxylate;manganese(2+) Chemical compound [Mn+2].[Mn+2].[Mn+2].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O OAVRWNUUOUXDFH-UHFFFAOYSA-H 0.000 claims description 2
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 claims description 2
- 229910021380 Manganese Chloride Inorganic materials 0.000 claims description 2
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 claims description 2
- ZBRIYBRFOLLBPI-UHFFFAOYSA-N acetic acid;n-(2-aminoethyl)hydroxylamine Chemical compound CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.NCCNO ZBRIYBRFOLLBPI-UHFFFAOYSA-N 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- 235000015165 citric acid Nutrition 0.000 claims description 2
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 claims description 2
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 claims description 2
- MULYSYXKGICWJF-UHFFFAOYSA-L cobalt(2+);oxalate Chemical compound [Co+2].[O-]C(=O)C([O-])=O MULYSYXKGICWJF-UHFFFAOYSA-L 0.000 claims description 2
- 239000008139 complexing agent Substances 0.000 claims description 2
- YNQRWVCLAIUHHI-UHFFFAOYSA-L dilithium;oxalate Chemical compound [Li+].[Li+].[O-]C(=O)C([O-])=O YNQRWVCLAIUHHI-UHFFFAOYSA-L 0.000 claims description 2
- IRXRGVFLQOSHOH-UHFFFAOYSA-L dipotassium;oxalate Chemical compound [K+].[K+].[O-]C(=O)C([O-])=O IRXRGVFLQOSHOH-UHFFFAOYSA-L 0.000 claims description 2
- 229960001484 edetic acid Drugs 0.000 claims description 2
- 239000000174 gluconic acid Substances 0.000 claims description 2
- 235000012208 gluconic acid Nutrition 0.000 claims description 2
- GKQWYZBANWAFMQ-UHFFFAOYSA-M lithium;2-hydroxypropanoate Chemical compound [Li+].CC(O)C([O-])=O GKQWYZBANWAFMQ-UHFFFAOYSA-M 0.000 claims description 2
- 235000002867 manganese chloride Nutrition 0.000 claims description 2
- 239000011565 manganese chloride Substances 0.000 claims description 2
- 229940099607 manganese chloride Drugs 0.000 claims description 2
- 229940097206 manganese citrate Drugs 0.000 claims description 2
- 235000014872 manganese citrate Nutrition 0.000 claims description 2
- 239000011564 manganese citrate Substances 0.000 claims description 2
- 229940099594 manganese dioxide Drugs 0.000 claims description 2
- 229940099596 manganese sulfate Drugs 0.000 claims description 2
- 235000007079 manganese sulphate Nutrition 0.000 claims description 2
- 239000011702 manganese sulphate Substances 0.000 claims description 2
- RGVLTEMOWXGQOS-UHFFFAOYSA-L manganese(2+);oxalate Chemical compound [Mn+2].[O-]C(=O)C([O-])=O RGVLTEMOWXGQOS-UHFFFAOYSA-L 0.000 claims description 2
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 claims description 2
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 2
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 2
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims description 2
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 2
- BYOBIQOEWYNTMM-UHFFFAOYSA-N manganese;nitric acid Chemical group [Mn].O[N+]([O-])=O BYOBIQOEWYNTMM-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 13
- 238000007599 discharging Methods 0.000 abstract description 4
- 239000002253 acid Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 239000011164 primary particle Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000010532 solid phase synthesis reaction Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910015872 LiNi0.8Co0.1Mn0.1O2 Inorganic materials 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 229910015177 Ni1/3Co1/3Mn1/3 Inorganic materials 0.000 description 2
- HFCVPDYCRZVZDF-UHFFFAOYSA-N [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O Chemical compound [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O HFCVPDYCRZVZDF-UHFFFAOYSA-N 0.000 description 2
- 239000010405 anode material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 238000009831 deintercalation Methods 0.000 description 2
- 238000002242 deionisation method Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229940008015 lithium carbonate Drugs 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000010189 synthetic method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- 244000248349 Citrus limon Species 0.000 description 1
- 235000005979 Citrus limon Nutrition 0.000 description 1
- 229910032387 LiCoO2 Inorganic materials 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 229910002991 LiNi0.5Co0.2Mn0.3O2 Inorganic materials 0.000 description 1
- 229910001290 LiPF6 Inorganic materials 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- VQWQYXBWRCCZGX-UHFFFAOYSA-N acetic acid;manganese Chemical compound [Mn].CC(O)=O.CC(O)=O VQWQYXBWRCCZGX-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004137 mechanical activation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
本发明公开了一种镍钴锰酸锂三元正极材料的制备方法,属于能源材料技术领域。本发明包括如下步骤:(1)将锂源、镍源、钴源、锰源及含草酸根的化合物加入络合剂溶液中,搅拌至全部溶解,得到混合溶液;(2)将混合溶液静置,冷冻结晶得到絮状沉淀;(3)将絮状沉淀过滤、洗涤、干燥得前驱体,将前驱体煅烧后随炉冷却即得镍钴锰酸锂三元正极材料。本方法可显著提高镍钴锰酸锂三元正极材料的充放电比容量、倍率性能和循环性能。
Description
技术领域
本发明涉及一种锂离子电池正极材料的制备方法,具体涉及一种镍钴锰酸锂三元正极材料的制备方法。
背景技术
目前商业化的锂离子电池正极材料主要是钴酸锂,但由于其价格昂贵且热稳定性差,所以难以在动力电池或储能电池领域得到应用。磷酸铁锂和锰酸锂由于成本低、资源丰富等特点,被认为是具有发展前景的动力锂离子电池正极材料,但它们的容量低,能量密度较低,无法满足高能量密度动力电池的要求。因此,人们近年来致力于研究高容量正极材料,其中镍钴锰酸锂三元正极材料因兼有钴酸锂和镍酸锂的优点,且合成方法简单,价格相对便宜,被认为是一种很有前途的正极材料,在动力电池和储能电池领域有广阔的应用前景。
与钴酸锂相比,镍钴锰酸锂三元材料具有以下显著优势:(1)成本相对较低:由于钴含量低,成本仅相当于钴酸锂的1/4;(2)安全性能好:安全工作温度可达170 ℃,而钴酸锂仅为130 ℃,大幅提升了使用安全性;(3)比容量高:Li充电电压在4.6 V 时(钴酸锂充电限制电压为4.2 V),其放电比容量高达210 mAh/g,充电电压在4.8 V 时,其放电比容量高达245 mAh/g,相当于钴酸锂的1.7 倍,极大提升了电池的能量密度和供电时间。
虽然镍钴锰酸锂三元正极材料具有如此大的潜在优势,但目前市场上的镍钴锰酸锂三元正极材料在实际应用过程中尚存在一些缺陷,如:(1)阳离子混排使得材料首次充放电库伦效率较低;(2)锂离子扩散系数较低(约10-11 cm2/S),比LiCoO2(10-9 cm2/S)低两个数量级,这导致该材料的倍率性能较差;(3)储存性能较差。
发明内容
本发明的目的是提供一种镍钴锰酸锂三元正极材料的制备方法,以解决现有技术存在的上述问题。
为了达到上述目的,本发明采取的技术方案如下:
一种镍钴锰酸锂三元正极材料的制备方法,包括如下步骤:
(1)将锂源、镍源、钴源、锰源及含草酸根的化合物加入络合剂溶液中,以摩尔比计,Li:Ni:Co:Mn:草酸根:络合剂=(0.98~1.1) : (0.05~1) : (0.05~1) : (0.05~1) :(2~4) : (1~4),搅拌至全部溶解,得到混合溶液;
(2)将步骤(1)所得的混合溶液静置,在-15~0℃下冷冻结晶1~20h,得到絮状沉淀;
(3)将絮状沉淀过滤、洗涤、干燥得前驱体,将前驱体于空气或氧气中并在750~1000℃下煅烧1~24h,随炉冷却即得镍钴锰酸锂三元正极材料,其化学式为,其中,0<x<1,0<y<1且(x+y)<1;
上述的絮状沉淀中至少含Li、Ni、Co、Mn和草酸根,还可能含铵根、硝酸根、柠檬酸根、酒石酸根等,除Li、Ni、Co、Mn外,其它物质在煅烧时均变为气体除去。
所述锂源为氢氧化锂、碳酸锂、乙酸锂、硝酸锂、草酸锂、乳酸锂中的一种或几种;
所述镍源为硫酸镍、氯化镍、硝酸镍、草酸镍、乙酸镍、柠檬酸镍、氧化镍中的一种或几种;
所述钴源为硫酸钴、氯化钴、硝酸钴、草酸钴、乙酸钴、柠檬酸钴、四氧化三钴中的一种或几种;
所述锰源为硫酸锰、氯化锰、硝酸锰、草酸锰、乙酸锰、柠檬酸锰、二氧化锰中的一种或几种;
所述含草酸根的化合物为草酸、草酸钠、草酸钾和草酸铵中的一种或几种;
所述络合剂溶液为氨水、乙二胺四乙酸、二乙烯三胺五乙酸、羟乙二胺四乙酸、酒石酸、柠檬酸、抗坏血酸、葡萄糖酸中的一种或几种。
上述技术方案,所述步骤(1)中,络合剂溶液的浓度为0.2~4 mol/L。
上述技术方案,所述步骤(1)中,锂源为氢氧化锂、乙酸锂,镍源为硝酸镍、乙酸镍,钴源为硝酸钴、乙酸钴,锰源为硝酸锰、乙酸锰,草酸根的化合物为草酸钠,络合剂溶液柠檬酸、酒石酸。
上述技术方案,所述步骤(2)中,冷冻结晶2~10h。
上述技术方案,所述步骤(3)中,煅烧时间为6~18h。
有益效果:(1)由于Li、Ni、Co、Mn在冷冻结晶过程中是均匀析出的,因此获得的前驱体成分均匀,而镍钴锰酸锂是由前驱体直接煅烧获得,因此本方法可充分保证镍钴锰酸锂化学成分的均一性。由于前驱体成分均一且一次颗粒细小,因此煅烧时更容易获得结晶良好的三元材料,相比普通固相法的煅烧温度低,从而可降低能耗。同时,成分的高度均一性有利于提高材料的结构稳定性,减少阳离子混排,从而可显著提高材料的充放电比容量、倍率性能和循环性能。
(2)本方法将前驱体直接煅烧得到产物,无需额外的混料过程,因此产物镍钴锰酸锂可很好地继承前驱体的形貌。因此,相对于其它合成镍钴锰酸锂的方法(如固相法等),本方法制备的镍钴锰酸锂形貌可控,可以通过控制产物颗粒形貌来控制材料颗粒尺寸的大小及比表面积,从而控制材料的离子电导率(粒径越小、比表面越大越有利于锂离子的扩散),进而提高材料的倍率性能。
(3)本方法先通过冷冻结晶得到含Li、Ni、Co、Mn的絮状前驱体,再将前驱体煅烧得到絮状镍钴锰酸锂三元材料,该絮状材料由纳米级一次颗粒团聚而成,一次颗粒细小且具有较大的比表面积,有利于镍钴锰酸锂与电解液的充分接触,有利于锂离子的脱嵌,材料的离子电导率高,因而可显著提高镍钴锰酸锂的倍率性能和循环性能。
附图说明
图1为实施例1制备的镍钴锰酸锂三元正极材料样品的XRD图谱;
图2为实施例1制备的镍钴锰酸锂三元正极材料样品的扫描电镜图;
图3为对比例1制备的镍钴锰酸锂三元正极材料样品的扫描电镜图;
图4为实施例1制备的镍钴锰酸锂三元正极材料样品在0.1C倍率下的首次充放电曲线;
图5为对比例1制备的镍钴锰酸锂三元正极材料样品在0.1C倍率下的首次充放电曲线。
具体实施方式
下面结合附图及具体的实施例对本发明作进一步说明。
实施例1
一种镍钴锰酸锂三元正极材料的制备方法,包括如下步骤:首先配制浓度为3mol/L的酒石酸溶液,然后按摩尔比Li:Ni:Co:Mn:草酸根:酒石酸=1.01:0.8:0.1:0.1:4:1向该酒石酸溶液中加入碳酸锂、乙酸镍、乙酸钴、乙酸锰和草酸铵,搅拌溶解,得到混合溶液。将所得的混合溶液静置,在-2℃下冷冻结晶5h后,析出絮状沉淀,过滤得到絮状沉淀,将絮状沉淀用去离子水洗涤、干燥后得前驱体,将前驱体在850℃下于空气中煅烧12h,随炉冷却即得絮状LiNi0.8Co0.1Mn0.1O2正极材料。
实施例2
一种镍钴锰酸锂三元正极材料的制备方法,包括如下步骤:首先配制浓度为1mol/L的柠檬酸溶液,然后按摩尔比Li:Ni:Co:Mn:草酸根:柠檬酸=1.1:0.33:0.33:0.33:2:2向该柠檬酸溶液中加入乙酸锂、柠檬酸镍、柠檬酸钴、硝酸锰和草酸钠,搅拌溶解,得到混合溶液,然后将混合溶液静置,在-15℃下冷冻结晶1h,将析出的絮状沉淀过滤,将沉淀用去离子水洗涤、干燥后得前驱体,将前驱体在900℃下于氧气中煅烧1h,随炉冷却即得絮状Li1.04Ni1/3Co1/3Mn1/3O2正极材料。
实施例3
一种镍钴锰酸锂三元正极材料的制备方法,包括如下步骤:首先配制浓度为0.2mol/L的抗坏血酸溶液,然后按摩尔比Li:Ni:Co:Mn:草酸根:抗坏血酸=1.02:0.5:0.2:0.3:3:4向该抗坏血酸溶液中加入碳酸锂、氯化镍、乙酸钴、硝酸锰和草酸,搅拌溶解,得到混合溶液,然后将混合溶液静置,在-8℃下冷冻结晶8h,将析出的絮状沉淀过滤,将沉淀用去离子水洗涤、干燥后得前驱体,将前驱体在1000℃下于空气中煅烧3h,随炉冷却即得絮状LiNi0.5Co0.2Mn0.3O2正极材料。
实施例4
一种镍钴锰酸锂三元正极材料的制备方法,包括如下步骤:首先配制浓度为4mol/L的乙二胺四乙酸溶液,然后按摩尔比Li:Ni:Co:Mn:草酸根:酒石酸=0.98:0.33:0.33:0.33:3:2向该乙二胺四乙酸溶液中加入氢氧化锂、草酸镍、硝酸钴、硝酸锰和草酸铵,搅拌溶解,得到混合溶液,然后将混合溶液静置,在0℃下冷冻结晶20h,将析出的絮状沉淀过滤,将沉淀用去离子水洗涤、干燥后得前驱体,将前驱体在750℃下于氧气中煅烧12h,随炉冷却即得絮状Li0.98Ni1/3Co1/3Mn1/3O2正极材料。
对比例1
本对比实施例为目前市场上的镍钴锰酸锂三元正极材料的常规的制备方法,具体步骤如下:按摩尔比Li:Ni:Co:Mn=1.01:0.8:0.1:0.1:4:1称取碳酸锂、乙酸镍、乙酸钴和乙酸锰,混合后机械活化4h得到混合物,将所得混合物在850℃下于空气中煅烧12h,随炉冷却即得LiNi0.8Co0.1Mn0.1O2正极材料。
对实施例1-4和对比例1制得的镍钴锰酸锂三元正极材料进行电化学性能的测试,在进行测试前,先制备电池。
电池的制备方法如下:
以实施例1、2、3、4及对比例1制备的镍钴锰酸锂为正极活性材料,将其与乙炔黑、PVDF按90:5:5的质量比称取后,在研钵中研磨20分钟使之混合均匀,然后加入N-甲基吡咯烷酮(NMP),再研磨20分钟得到均匀的黑色浆料。将黑色浆料均匀地涂布在铝箔上,然后置于真空干燥箱中120℃干燥12h,再冲切成直径14mm的圆片作为正极。将正极片、负极片(直径14.5 mm的金属锂片)、隔膜(Celgard 2400微孔聚丙烯膜)和电解液(1 mol/L LiPF6 / EC+DMC(体积比1:1))在充满氩气的手套箱中组装成CR2025型扣式电池,将电池静置12h后进行电化学性能测试。进行电化学性能测试时以金属Li为对电极,充放电电压范围2.7-4.3 V,25℃恒温。
表1为实施例1-4和对比例1所制备的样品的电化学性能对比。
表1
从表1可以看出,在不同倍率下进行测试,不论是首次充放电还是1C倍率下循环100次以后的容量保持率,由本发明提供方法制备的实施例1-4正极材料的电化学性能均明显优于对比例1。在相同倍率下,实施例1-4的首次放电比容量均比对比例1的首次放电比容量大。从表中数据可以看出,本发明的实施例1-4的倍率性能比对比例1好。另外,由实施例4可以看出,由本发明提供的方法在750℃下制备的三元材料也具有优异的电化学性能,这与一般方法制备三元材料需850℃以上的温度相比,合成温度大大降低,这有利于减少电能消耗,降低生产成本。
由图1可知,实验例1制备的镍钴锰酸锂为纯相,其衍射峰尖锐,结晶良好;由图2可以看出,实施例1制备的镍钴锰酸锂呈絮状结构,一次颗粒为纳米级晶须;如图3所示,对比例1制备的镍钴锰酸锂颗粒较粗且团聚严重。这证明,与现有普通的合成方法相比(如对比例1的固相法),由本发明提供的方法制备的镍钴锰酸锂结晶良好,产物为特殊絮状结构,且絮状结构产物由纳米级晶须组成,由于一次颗粒细小且比表面积较大,因此材料在充放电时更有利于锂离子脱嵌,从而具有优异的电化学性能(如高的首次充放电容量、倍率性能、循环性能)。对比图4和图5可知,与对比例1相比,实施例1制备的镍钴锰酸锂首次放电比容量更高、首次充放电效率更高、工作电压更高、充放电曲线极化更小,电化学性能更为优异,这说明本发明提供方法制备的镍钴锰酸锂具有更为优异的电化学性能。
Claims (5)
1.一种镍钴锰酸锂三元正极材料的制备方法,其特征在于,包括如下步骤:
(1)将锂源、镍源、钴源、锰源及含草酸根的化合物加入络合剂溶液中,以摩尔比计,Li:Ni:Co:Mn:草酸根:络合剂=(0.98~1.1) : (0.05~1) : (0.05~1) : (0.05~1) :(2~4) : (1~4),搅拌至全部溶解,得到混合溶液;
(2)将步骤(1)所得的混合溶液静置,在-15~0℃下冷冻结晶1~20h,得到絮状沉淀;
(3)将絮状沉淀过滤、洗涤、干燥得前驱体,将前驱体于空气或氧气中并在750~1000℃下煅烧1~24h,随炉冷却即得镍钴锰酸锂三元正极材料,化学式为,其中,0<x<1,0<y<1且(x+y)<1;
所述锂源为氢氧化锂、碳酸锂、乙酸锂、硝酸锂、草酸锂、乳酸锂中的一种或几种;
所述镍源为硫酸镍、氯化镍、硝酸镍、草酸镍、乙酸镍、柠檬酸镍、氧化镍中的一种或几种;
所述钴源为硫酸钴、氯化钴、硝酸钴、草酸钴、乙酸钴、柠檬酸钴、四氧化三钴中的一种或几种;
所述锰源为硫酸锰、氯化锰、硝酸锰、草酸锰、乙酸锰、柠檬酸锰、二氧化锰中的一种或几种;
所述含草酸根的化合物为草酸、草酸钠、草酸钾和草酸铵中的一种或几种;
所述络合剂溶液为氨水、乙二胺四乙酸、二乙烯三胺五乙酸、羟乙二胺四乙酸、酒石酸、柠檬酸、抗坏血酸、葡萄糖酸中的一种或几种。
2.如权利要求1所述的镍钴锰酸锂三元正极材料的制备方法,其特征在于:所述步骤(1)中,络合剂溶液的浓度为0.2~4 mol/L。
3.如权利要求1所述的镍钴锰酸锂三元正极材料的制备方法,其特征在于:步骤(1)中,所述锂源为氢氧化锂、乙酸锂,镍源为硝酸镍、乙酸镍,钴源为硝酸钴、乙酸钴,锰源为硝酸锰、乙酸锰,草酸根的化合物为草酸钠,络合剂溶液柠檬酸、酒石酸。
4.如权利要求1所述的镍钴锰酸锂三元正极材料的制备方法,其特征在于:所述步骤(2)中,冷冻结晶2~10h。
5.如权利要求1所述的镍钴锰酸锂三元正极材料的制备方法,其特征在于:所述步骤(3)中,煅烧时间为6~18h。
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CN111362317A (zh) * | 2020-02-24 | 2020-07-03 | 西南交通大学 | 一种LiNi0.6Co0.2Mn0.2O2的制备方法 |
CN111362317B (zh) * | 2020-02-24 | 2021-02-02 | 西南交通大学 | 一种LiNi0.6Co0.2Mn0.2O2的制备方法 |
CN113373500A (zh) * | 2021-05-31 | 2021-09-10 | 南通金通储能动力新材料有限公司 | 一种高镍单晶三元前驱体及其制备方法 |
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