CN104064744B - 锂离子电池正极材料及其制备方法 - Google Patents
锂离子电池正极材料及其制备方法 Download PDFInfo
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 22
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000010405 anode material Substances 0.000 title claims abstract description 10
- 239000002253 acid Substances 0.000 claims abstract description 28
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 25
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims abstract description 23
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 20
- 239000010941 cobalt Substances 0.000 claims abstract description 20
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000004411 aluminium Substances 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 150000001399 aluminium compounds Chemical class 0.000 claims abstract description 10
- BLJNPOIVYYWHMA-UHFFFAOYSA-N alumane;cobalt Chemical compound [AlH3].[Co] BLJNPOIVYYWHMA-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000001354 calcination Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011572 manganese Substances 0.000 claims abstract description 5
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 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
- 230000032683 aging Effects 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 230000001376 precipitating effect Effects 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 239000012065 filter cake Substances 0.000 claims description 9
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 7
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 6
- 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 6
- 239000008139 complexing agent Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 229940099596 manganese sulfate Drugs 0.000 claims description 5
- 239000011702 manganese sulphate Substances 0.000 claims description 5
- 235000007079 manganese sulphate Nutrition 0.000 claims description 5
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 claims description 5
- 150000001868 cobalt Chemical class 0.000 claims description 4
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 claims description 4
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- HDYRYUINDGQKMC-UHFFFAOYSA-M acetyloxyaluminum;dihydrate Chemical compound O.O.CC(=O)O[Al] HDYRYUINDGQKMC-UHFFFAOYSA-M 0.000 claims description 3
- 229940009827 aluminum acetate Drugs 0.000 claims description 3
- 150000002696 manganese Chemical class 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 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 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 2
- 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 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
- 159000000013 aluminium salts Chemical class 0.000 claims description 2
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 2
- 239000001099 ammonium carbonate Substances 0.000 claims description 2
- 235000012501 ammonium carbonate Nutrition 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 claims description 2
- 229910001981 cobalt nitrate Inorganic materials 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 239000011565 manganese chloride Substances 0.000 claims description 2
- 235000002867 manganese chloride Nutrition 0.000 claims description 2
- 229940099607 manganese chloride Drugs 0.000 claims description 2
- 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 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 1
- 206010019233 Headaches Diseases 0.000 abstract description 2
- 239000010406 cathode material Substances 0.000 abstract description 2
- 238000000151 deposition Methods 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract description 2
- 231100000869 headache Toxicity 0.000 abstract description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 24
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 8
- 239000011259 mixed solution Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 238000005457 optimization Methods 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 244000025254 Cannabis sativa Species 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000951 Aluminide Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- SMBQBQBNOXIFSF-UHFFFAOYSA-N dilithium Chemical compound [Li][Li] SMBQBQBNOXIFSF-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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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
- 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
- H01M4/36—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
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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- 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
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- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
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- Battery Electrode And Active Subsutance (AREA)
Abstract
本发明涉及一种锂离子电池正极材料,包括锰酸锂或钴酸锂,所述钴酸锂、锰酸锂中外加有0.5-5%wt的铝化合物。本发明在钴酸锂正极材料中加入铝化合物,避免过量的锂离子进入负极,从根本上杜绝了安全隐患,解决了钴酸锂锂离子电池头痛的安全问题,提高了电池的安全性,显著提高了锰酸锂的导电性能,提高了电池的使用寿命,具有良好的安全性能及高的容量特性。本发明是用一种高密度、晶形结构完整的含铝前驱体煅烧而成,此工艺简单、成本低,容易工业化,采用特殊的沉淀工艺,制备一种含铝钴、锰前驱体,可有效的控制产品的粒度、密度使形状为球形颗粒,洗涤效果好,用此前驱体很容易制备本发明的含铝钴酸锂或者锰酸锂。
Description
技术领域
本发明涉及一种改进的锂离子电池正极材料,尤其是加有铝化物的锰酸锂或钴酸锂锂离子正极材料。
背景技术
锂离子电池是一种新兴电源,它具有电压高、容量大、安全及环保等诸多有点,因此在二次电池领域受到广泛应用。目前锂离子电池的正极材料应用最为普遍的是钴酸锂、锰酸锂,钴酸锂有高容量特性、低安全性,锰酸锂有高安全性但其容量低,钴酸锂克容量能达到160mAh/g,锰酸锂的克容量则只有130mAh/g,如何提高钴酸锂的安全性能以及提高锰酸锂的克容量性能是当前技术革新的重点。
发明内容
发明目的:本发明为了克服上述已有技术的缺点和不足,提供一种安全性能好的钴酸锂、高容量性能的锰酸锂的制备方法,使制备出来的钴酸锂、锰酸锂具有良好的安全性能、较高的容量性能,从而提高锂离子电池电化学性能,提高电池的质量。
本发明提供了一种优异的钴酸锂、锰酸锂制备方法,通过控制合成工艺,首先合成一种高密度球形钴铝或锰铝前驱体,再把此前驱体按一定比例与碳酸锂或者氢氧化锂混合后煅烧,获得高密度含铝钴酸锂或者锰酸锂,该法工艺简单,容易实现工艺化,并且合成的含铝钴酸锂、锰酸锂显示更好的特性,与以往的钴酸锂、锰酸锂比较,显著地提高了电池的质量。
技术方案:一种锂离子电池正极材料,包括锰酸锂或钴酸锂,其特征在于:所述钴酸锂、锰酸锂中外加有0.5-5%wt的铝化合物。
作为优化:所述铝化合物外加量为0.5~5%wt,是本发明试验所得优化区间,并非数学精确值;但加入量过低,则改善效果不够明显,加入量过高,又会导致活性物质含量降低,质量能量比下降,造成电池容量减小。本发明更好外加量为1-2%wt。
作为优化:所述铝化合物为醋酸铝、硝酸铝,氧化铝、硫酸铝、氢氧化铝中一种或二种及以上混合,本发明较好采用醋酸铝,采用氧化铝不易引入影响正极材料的杂质元素,更有利于改善正极材料性能。
作为优化:所述铝化合物在制备钴酸锂过程中加入,有利于两种材料的原子结合。
作为优化:所述的锂离子电池正极材料的制备方法,按如下步骤进行:
1)用纯水将工业级的碱性沉淀剂、络合剂配成碱性沉淀剂浓度为4M~10M、络合剂浓度为2M~6M的溶液;
2)用纯水分别将工业级的钴盐或者锰盐配制成金属浓度为的溶液;
3)用纯水将工业级的铝盐配制成铝盐浓度为0.1M~6M的溶液;
4)开启反应釜的搅拌,投入2L的去离子水做底水,并将底水加热到30℃~50℃。按a∶b=1∶0.5~2,将a、b两种溶液并流到反应釜中,控制PH值9~13.5,同时按一定比例加入c溶液,反应生成的浆料溢流在另一个容器中陈化4~10小时即可;
5)然后过滤d项的沉淀,并用滤饼的4~15倍重量的纯水洗涤3~6次,指导洗水电导率小于200μS/cm,然后过滤,滤饼在120~200℃的烘箱中干燥4~10小时即可;
6)取e项的烘干粉末1份、碳酸锂0.45~0.55份,放入混合机中充分混合后,在900℃~1000℃温度下煅烧5~10小时,即可得到含铝钴酸锂或者锰酸锂。
作为优化:所述的钴盐或者锰盐为氯化钴、硝酸钴、硫酸钴、硫酸锰、硝酸锰、氯化锰中的一种或几种。
作为优化:所述的碱性沉淀剂为碳酸铵、碳酸氢铵中的一种或几种。
作为优化:所述的络合剂为草酸、柠檬酸、EDTA、氨水中的一种或几种。
有益效果:本发明在钴酸锂正极材料中加入铝化合物,避免过量的锂离子进入负极,从根本上杜绝了安全隐患,解决了钴酸锂锂离子电池头痛的安全问题,提高了电池的安全性,显著提高了锰酸锂的导电性能,提高了电池的使用寿命,具有良好的安全性能及高的容量特性。本发明是用一种高密度、晶形结构完整的含铝前驱体煅烧而成,此工艺简单、成本低,容易工业化,采用特殊的沉淀工艺,制备一种含铝钴、锰前驱体,可有效的控制产品的粒度、密度使形状为球形颗粒,洗涤效果好,用此前驱体很容易制备本发明的含铝钴酸锂或者锰酸锂。
具体实施方式
下面结合具体实施例对本发明进行详细阐述。
实施例1:
用纯水将硫酸钴配成2M、柠檬酸配成1M的混合溶液,用纯水将氢氧化钾配成7M、草酸配成2M的混合溶液,开启反应容器的搅拌,将硫酸铝配制成0.2M的溶液,投入2升的纯水,并将底水加热到40℃,硫酸钴以10ml/min的流速加入到反应容器中,硫酸铝以1ml/min碱性沉淀剂碳酸氢铵以的流速加入到反应容器中,通过调节氢氧化钾的流速,控制PH值为10±0.2,反应生成的沉淀悬浮液溢流到另一容器中陈化,陈化6小时后,将沉淀洗涤干净,直到洗涤水电导率小于200μS/cm,然后过滤,把滤饼在120℃烘干,烘干后的产物再与碳酸锂混合在1000℃温度下煅烧8小时,得到含铝钴酸锂混合物锂离子电池正极材料。
实施例2:
用纯水将氯化钴配成2M、柠檬酸配成1M的混合溶液,用纯水将氢氧化钾配成7M、草酸配成2M的混合溶液,开启反应容器的搅拌,将氯化铝配制成0.2M的溶液,投入2升的纯水,并将底水加热到40℃,氯化钴以10ml/min的流速加入到反应容器中,氯化铝以1ml/min碱性沉淀剂碳酸氢铵以的流速加入到反应容器中,通过调节氢氧化钾的流速,控制PH值为10±0.2,反应生成的沉淀悬浮液溢流到另一容器中陈化,陈化6小时后,将沉淀洗涤干净,直到洗涤水电导率小于200μS/cm,然后过滤,把滤饼在120℃烘干,烘干后的产物再与碳酸锂按比例混合在1000℃温度下煅烧8小时,得到含铝钴酸锂混合物锂离子电池正极材料。
实施例3:
用纯水将硫酸锰配成2M、柠檬酸配成1M的混合溶液,用纯水将氢氧化钾配成7M、草酸配成2M的混合溶液,开启反应容器的搅拌,将硫酸铝配制成0.2M的溶液,投入2升的纯水,并将底水加热到40℃,硫酸锰以10ml/min的流速加入到反应容器中,硫酸铝以1ml/min碱性沉淀剂碳酸氢铵以的流速加入到反应容器中,通过调节氢氧化钾的流速,控制PH值为10±0.2,反应生成的沉淀悬浮液溢流到另一容器中陈化,陈化6小时后,将沉淀洗涤干净,直到洗涤水电导率小于200μS/cm,然后过滤,把滤饼在120℃烘干,烘干后的产物再与碳酸锂混合在1000℃温度下煅烧8小时,得到含铝锰酸锂混合物锂离子电池正极材料。
实施例4:
用纯水将氯化锰配成2M、柠檬酸配成1M的混合溶液,用纯水将氢氧化钾配成7M、草酸配成2M的混合溶液,开启反应容器的搅拌,将硫氯化铝配制成0.2M的溶液,投入2升的纯水,并将底水加热到40℃,硫酸锰以10ml/min的流速加入到反应容器中,氯化铝以1ml/min碱性沉淀剂碳酸氢铵以的流速加入到反应容器中,通过调节氢氧化钾的流速,控制PH值为10±0.2,反应生成的沉淀悬浮液溢流到另一容器中陈化,陈化6小时后,将沉淀洗涤干净,直到洗涤水电导率小于200μS/cm,然后过滤,把滤饼在120℃烘干,烘干后的产物再与碳酸锂混合在1000℃温度下煅烧8小时,得到含铝锰酸锂混合物锂离子电池正极材料。
Claims (3)
1.一种锂离子电池正极材料的制备方法,其特征在于:所述锂离子电池正极材料,包括锰酸锂或钴酸锂,所述钴酸锂或锰酸锂中外加有0.5-5%wt的铝化合物;
所述锂离子电池正极材料的制备方法,按如下步骤进行:
1)用纯水将工业级的碱性沉淀剂、络合剂配成碱性沉淀剂浓度为4M~10M、络合剂浓度为2M~6M的溶液,即为a溶液;
2)用纯水分别将工业级的钴盐或者锰盐配制成金属浓度为0.3-8M的溶液,即为b溶液;
3)用纯水将工业级的铝盐配制成铝盐浓度为0.1M~6M的溶液,即为c溶液;
4)开启反应釜的搅拌,投入2L的去离子水做底水,并将底水加热到30℃~50℃;按a∶b=1∶0.5~2,将a、b两种溶液并流到反应釜中,控制pH值9~13.5,同时按一定比例加入c溶液,反应生成的浆料溢流在另一个容器中陈化4~10小时即可得到陈化后的浆料;
5)然后过滤步骤4)中得到的陈化后的浆料,并用滤饼的4~15倍重量的纯水洗涤3~6次,直到洗水电导率小于200μS/cm,然后过滤,滤饼在120~200℃的烘箱中干燥4~10小时即可得到滤饼的烘干粉末;
6)取步骤5)中得到的滤饼的烘干粉末1份、碳酸锂0.45~0.55份,放入混合机中充分混合后,在900℃~1000℃温度下煅烧5~10小时,即可得到含铝钴酸锂或者含铝锰酸锂;
所述的钴盐为氯化钴、硝酸钴、硫酸钴中的一种或几种;所述的锰盐为硫酸锰、硝酸锰、氯化锰中的一种或几种;
所述的碱性沉淀剂为碳酸铵、碳酸氢铵中的一种或几种;
所述的络合剂为草酸、柠檬酸、EDTA、氨水中的一种或几种。
2.根据权利要求1所述的锂离子电池正极材料的制备方法,其特征在于:所述铝化合物为醋酸铝、硝酸铝,氧化铝、硫酸铝、氢氧化铝中一种以上。
3.根据权利要求1所述的锂离子电池正极材料的制备方法,其特征在于:所述铝化合物在制备钴酸锂过程中加入。
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