CN106910877A - 一种镍钴铝酸锂前驱体制备方法 - Google Patents
一种镍钴铝酸锂前驱体制备方法 Download PDFInfo
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- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000011259 mixed solution Substances 0.000 claims abstract description 29
- 239000000654 additive Substances 0.000 claims abstract description 16
- 230000000996 additive effect Effects 0.000 claims abstract description 16
- 239000000084 colloidal system Substances 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 150000002815 nickel Chemical class 0.000 claims abstract description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 10
- 239000012266 salt solution Substances 0.000 claims abstract description 10
- 150000001868 cobalt Chemical class 0.000 claims abstract description 9
- 239000002243 precursor Substances 0.000 claims abstract description 9
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000032683 aging Effects 0.000 claims abstract description 6
- 239000012670 alkaline solution Substances 0.000 claims abstract description 6
- 238000005406 washing Methods 0.000 claims abstract description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000004821 distillation Methods 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 6
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 6
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 claims description 5
- 159000000013 aluminium salts Chemical class 0.000 claims description 5
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 5
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 claims description 5
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims description 5
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- 150000001298 alcohols Chemical class 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 claims description 3
- 229910001981 cobalt nitrate Inorganic materials 0.000 claims description 3
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 claims description 3
- MULYSYXKGICWJF-UHFFFAOYSA-L cobalt(2+);oxalate Chemical compound [Co+2].[O-]C(=O)C([O-])=O MULYSYXKGICWJF-UHFFFAOYSA-L 0.000 claims description 3
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 3
- 229910000008 nickel(II) carbonate Inorganic materials 0.000 claims description 3
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims description 3
- ZULUUIKRFGGGTL-UHFFFAOYSA-L nickel(ii) carbonate Chemical compound [Ni+2].[O-]C([O-])=O ZULUUIKRFGGGTL-UHFFFAOYSA-L 0.000 claims description 3
- 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 3
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims 1
- MQRWBMAEBQOWAF-UHFFFAOYSA-N acetic acid;nickel Chemical compound [Ni].CC(O)=O.CC(O)=O MQRWBMAEBQOWAF-UHFFFAOYSA-N 0.000 claims 1
- 238000003682 fluorination reaction Methods 0.000 claims 1
- 229940078494 nickel acetate Drugs 0.000 claims 1
- 238000000034 method Methods 0.000 description 9
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 239000010406 cathode material Substances 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0438—Processes of manufacture in general by electrochemical processing
- H01M4/045—Electrochemical coating; Electrochemical impregnation
- H01M4/0454—Electrochemical coating; Electrochemical impregnation from melts
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/006—Compounds containing, besides nickel, two or more other elements, with the exception of oxygen or hydrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- 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
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- H01M4/24—Electrodes for alkaline accumulators
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- H01M4/46—Alloys based on magnesium or aluminium
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Abstract
本发明提供一种镍钴铝酸锂前驱体制备方法,包括以下步骤:1)按照摩尔比为Ni:Co:Al=(0.6‑0.9):(0.05‑0.3):(0.01‑0.1)的比例将镍盐溶液、钴盐溶液及铝盐溶液混合形成第一混合溶液;2)将所述第一混合溶液加入到氨水中,搅拌均匀后采用碱性溶液调节pH值形成pH≥12的第二混合溶液;3)向所述第二混合溶液中加入适量的添加剂,搅拌均匀后静置陈化10‑24h形成前驱体胶体;4)将所述前驱体胶体先用蒸馏水洗涤,再用醇类液体洗涤,然后离心浓缩得到前驱体凝胶;5)将所述前驱体凝胶在200‑300℃下干燥4‑8h,然后在1100‑1600℃下煅烧3‑6h即可获得前驱体粉体。
Description
【技术领域】
本发明涉及锂离子电池正极材料技术领域,尤其涉及一种镍钴铝酸锂前驱体制备方法。
【背景技术】
锂离子电池作为新一代环保电池,已成为电池产业发展的重点之一,市场对锂离子电池能量密度的要求也越来越高。正极材料是制约锂离子电池能量密度提升的关键因素,因此具有放电比容量高、低温和倍率性能好的三元正极材料得到了市场的重视,尤其是镍钴铝酸锂作为正极材料,对电池容量、质量能量密度、体积能量密度方面都有较大的提高。三元正极材料的各项物理化学和电化学性能与前驱体有关,因而提高前驱体质量对于提高镍钴铝酸锂正极材料的各项物理和电化学性能,例如,碾压密度、倍率放电性能、循环稳定性能等起到至关重要的影响。
目前,镍钴铝酸锂的前驱体通常采用控制结晶法制备,然而该方法无法保证镍、钴和铝三种元素的混合均匀度,制得的前驱体性能不稳定。鉴于此,实有必要提供一种镍钴铝酸锂前驱体的制备方法以克服以上缺陷。
【发明内容】
本发明的目的是提供一种镍钴铝酸锂前驱体制备方法,能够有效的制备出性能稳定良好的锂离子电池三元正极材料前驱体。
为了实现上述目的,本发明提供一种镍钴铝酸锂前驱体制备方法,包括以下步骤:
1)按照摩尔比为Ni:Co:Al=(0.6-0.9):(0.05-0.3):(0.01-0.1)的比例将镍盐溶液、钴盐溶液及铝盐溶液混合形成第一混合溶液;
2)将所述第一混合溶液加入到氨水中,搅拌均匀后采用碱性溶液调节pH值形成pH≥12的第二混合溶液;
3)向所述第二混合溶液中加入适量的添加剂,搅拌均匀后静置陈化10-24h形成前驱体胶体;
4)将所述前驱体胶体先用蒸馏水洗涤,再用醇类液体洗涤,然后离心浓缩得到前驱体凝胶;
5)将所述前驱体凝胶在200-300℃下干燥4-8h,然后在1100-1600℃下煅烧3-6h即可获得前驱体粉体。
在一个优选实施方式中,所述镍盐为可溶性镍盐;所述钴盐为可溶性铝盐;所述铝盐为可溶性铝盐。
在一个优选实施方式中,所述镍盐为硫酸镍、氯化镍、硝酸镍、碱式碳酸镍及醋酸镍中的至少一种;所述钴盐为硫酸钴、硝酸钴、氯化钴及草酸钴中的至少一种;所述铝盐为硝酸铝、硫酸铝、氯化铝及其水合物中的至少一种。
在一个优选实施方式中,所述氨水的质量分数为5%-25%。
在一个优选实施方式中,所述碱性溶液为NaOH溶液、Na2CO3或者NH4HCO3溶液。
在一个优选实施方式中,步骤2)与步骤3)中,搅拌时转速大于4000r/min。
在一个优选实施方式中,所述添加剂的加入量相对于所述第二混合溶液的质量分数为0.01-0.05%。
在一个优选实施方式中,所述添加剂为氟化铵、尿素及硫脲中的至少一种。
在一个优选实施方式中,所述醇类为乙醇、正丁醇、正丙醇、乙二醇、异丁醇中的至少一种。
本发明提供的镍钴铝酸锂前驱体制备方法采用反相沉淀的方法,有效解决了Ni2+、Co2+及Al3+沉淀不均匀的问题;通过使用添加剂控制结晶的颗粒度,使前驱体胶体热处理后的前驱体粉体不需要进行研磨处理即可达到纳米级,能够有效保障产品质量;此外,该方法工艺简单,便于大规模的工业化生产。
【附图说明】
图1为本发明提供的镍钴铝酸锂前驱体制备方法的流程框图。
图2为图1所示的镍钴铝酸锂前驱体制备方法由实施例1获得的镍钴铝酸锂前驱体的SEM图。
图3为图1所示的镍钴铝酸锂前驱体制备方法由实施例2获得的镍钴铝酸锂前驱体的SEM图。
【具体实施方式】
为了使本发明的目的、技术方案和有益技术效果更加清晰明白,以下结合附图和具体实施方式,对本发明进行进一步详细说明。应当理解的是,本说明书中描述的具体实施方式仅仅是为了解释本发明,并不是为了限定本发明。
请参考图1,本发明提供一种镍钴铝酸锂前驱体制备方法,包括以下步骤:
1)按照摩尔比为Ni:Co:Al=(0.6-0.9):(0.05-0.3):(0.01-0.1)的比例将镍盐溶液、钴盐溶液及铝盐溶液混合形成第一混合溶液;
2)将所述第一混合溶液加入到质量分数为5%-25%的氨水中,搅拌均匀后采用碱性溶液调节pH值形成pH≥12的第二混合溶液;
3)向所述第二混合溶液中加入适量的添加剂,搅拌均匀后静置陈化10-24h形成前驱体胶体;
4)将所述前驱体胶体先用蒸馏水洗涤,再用醇类液体洗涤,然后离心浓缩得到前驱体凝胶;
5)将所述前驱体凝胶在200-300℃下干燥4-8h,然后在1100-1600℃下煅烧3-6h即可获得前驱体粉体。
具体地,所述镍盐为可溶性镍盐,可以是硫酸镍、氯化镍、硝酸镍、碱式碳酸镍及醋酸镍中的至少一种;所述钴盐为可溶性铝盐,可以是硫酸钴、硝酸钴、氯化钴及草酸钴中的至少一种;所述铝盐为可溶性铝盐,可以是硝酸铝、硫酸铝、氯化铝及其水合物中的至少一种。所述碱性溶液为NaOH溶液、Na2CO3或者NH4HCO3溶液。所述添加剂为氟化铵、尿素及硫脲中的至少一种且所述添加剂的加入量相对于所述第二混合溶液的质量分数为0.01-0.05%。所述醇类为乙醇、正丁醇、正丙醇、乙二醇、异丁醇中的至少一种。进一步地,步骤2)与步骤3)中,搅拌采用高速搅拌或强力搅拌,搅拌时转速大于4000r/min。
实施例1
本实施例中,将等体积的浓度分别为0.9mol/L、0.3mol/L及0.1mol/L的氯化镍溶液、氯化钴溶液及氯化铝溶液混合形成第一混合溶液;将所述第一混合溶液加入到质量分数为25%的氨水中,以4500r/min的转速高速搅拌均匀后采用NaOH溶液调节pH值形成pH=12的第二混合溶液;向所述第二混合溶液中加入适量的添加剂,其中,所述添加剂的加入量相对于所述第二混合溶液的质量分数为0.05%,然后以4500r/min的转速高速搅拌均匀后静置陈化24h形成前驱体胶体;将所述前驱体胶体依次用蒸馏水与无水乙醇洗涤,然后离心浓缩得到前驱体凝胶;将所述前驱体凝胶在300℃下干燥8h,然后在1600℃下煅烧6h即可获得前驱体粉体。用扫描电子显微镜(SEM)对获得的上述前驱体粉体进行观察,结果如图2所示。
实施例2
本实施例中,将等体积的浓度分别为0.6mol/L、0.05mol/L及0.01mol/L的氯化镍溶液、氯化钴溶液及氯化铝溶液混合形成第一混合溶液;将所述第一混合溶液加入到质量分数为5%的氨水中,以4500r/min的转速高速搅拌均匀后采用NaOH溶液调节pH值形成pH=12的第二混合溶液;向所述第二混合溶液中加入适量的添加剂,其中,所述添加剂的加入量相对于所述第二混合溶液的质量分数为0.01%,然后以4500r/min的转速高速搅拌均匀后静置陈化10h形成前驱体胶体;将所述前驱体胶体依次用蒸馏水与无水乙二醇洗涤,然后离心浓缩得到前驱体凝胶;将所述前驱体凝胶在200℃下干燥4h,然后在1100℃下煅烧3h即可获得前驱体粉体。用扫描电子显微镜对获得的上述前驱体粉体进行观察,结果如图3所示。
本发明提供的镍钴铝酸锂前驱体制备方法采用反相沉淀的方法,有效解决了Ni2+、Co2+及Al3+沉淀不均匀的问题;通过使用添加剂控制结晶的颗粒度,使前驱体胶体热处理后的前驱体粉体不需要进行研磨处理即可达到纳米级,能够有效保障产品质量;此外,该方法工艺简单,便于大规模的工业化生产。
本发明并不仅仅限于说明书和实施方式中所描述,因此对于熟悉领域的人员而言可容易地实现另外的优点和修改,故在不背离权利要求及等同范围所限定的一般概念的精神和范围的情况下,本发明并不限于特定的细节、代表性的设备和这里示出与描述的图示示例。
Claims (9)
1.一种镍钴铝酸锂前驱体制备方法,其特征在于:包括以下步骤:
1)按照摩尔比为Ni:Co:Al=(0.6-0.9):(0.05-0.3):(0.01-0.1)的比例将镍盐溶液、钴盐溶液及铝盐溶液混合形成第一混合溶液;
2)将所述第一混合溶液加入到氨水中,搅拌均匀后采用碱性溶液调节pH值形成pH≥12的第二混合溶液;
3)向所述第二混合溶液中加入适量的添加剂,搅拌均匀后静置陈化10-24h形成前驱体胶体;
4)将所述前驱体胶体先用蒸馏水洗涤,再用醇类液体洗涤,然后离心浓缩得到前驱体凝胶;
5)将所述前驱体凝胶在200-300℃下干燥4-8h,然后在1100-1600℃下煅烧3-6h即可获得前驱体粉体。
2.如权利要求1所述的镍钴铝酸锂前驱体制备方法,其特征在于:所述镍盐为可溶性镍盐;所述钴盐为可溶性铝盐;所述铝盐为可溶性铝盐。
3.如权利要求2所述的镍钴铝酸锂前驱体制备方法,其特征在于:所述镍盐为硫酸镍、氯化镍、硝酸镍、碱式碳酸镍及醋酸镍中的至少一种;所述钴盐为硫酸钴、硝酸钴、氯化钴及草酸钴中的至少一种;所述铝盐为硝酸铝、硫酸铝、氯化铝及其水合物中的至少一种。
4.如权利要求1所述的镍钴铝酸锂前驱体制备方法,其特征在于:所述氨水的质量分数为5%-25%。
5.如权利要求1所述的镍钴铝酸锂前驱体制备方法,其特征在于:所述碱性溶液为NaOH溶液、Na2CO3或者NH4HCO3溶液。
6.如权利要求1所述的镍钴铝酸锂前驱体制备方法,其特征在于:步骤2)与步骤3)中,搅拌时转速大于4000r/min。
7.如权利要求1所述的镍钴铝酸锂前驱体制备方法,其特征在于:所述添加剂的加入量相对于所述第二混合溶液的质量分数为0.01-0.05%。
8.如权利要求1所述的镍钴铝酸锂前驱体制备方法,其特征在于:所述添加剂为氟化铵、尿素及硫脲中的至少一种。
9.如权利要求1所述的镍钴铝酸锂前驱体制备方法,其特征在于:所述醇类为乙醇、正丁醇、正丙醇、乙二醇、异丁醇中的至少一种。
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