镍钴锰三元前驱体的制备及性能研究  

Preparation and Properties of Nickel Cobalt Manganese Ternary Precursor

作　　者：尤大海 张朝宏 李国栋 张晋 张立 彭兴华 YOU Dahai;ZHANG Chaohong;LI Guodong;ZHANG Jin;ZHANG Li;PENG Xinghua(Hubei Institute of Metallurgical Geology(Central South Institute of Metallurgical Geology),Yichang 443000,China;Hubei Engineering Technology Research Center of Mineral Materials and Application,Yichang 443000,China)

机构地区：[1]湖北冶金地质研究所(中南冶金地质研究所),湖北宜昌443000 [2]湖北省矿物材料及应用工程技术研究中心,湖北宜昌443000

出　　处：《湿法冶金》2024年第2期178-182,共5页Hydrometallurgy of China

基　　金：湖北省自然科学基金资助项目(2022CFC046)。

摘　　要：研究了采用共沉淀法制备镍钴锰三元前驱体,考察了氨水浓度、体系pH、反应时间、反应温度对所制备前驱体性能指标的影响。结果表明:在氨水浓度1 mol/L,体系pH=12、反应温度55℃、反应温度28 h最佳试验条件下,所制备前驱体产品粒度分布良好,呈均匀的类球形,结晶致密;混锂煅烧后的正极材料在2.8~4.4 V、0.2 C充放电制度下首次放电容量为169.14 mAh/g,首次效率为88.32%。The preparation of nickel,cobalt and manganese ternary precursors by coprecipitation method was studied.The effects of ammonia concentration,system pH,reaction time and reaction temperature on the properties of the precursors prepared by coprecipitation method were investigated.The results show that under the optimal conditions of ammonia concentration of 1 mol/L,pH=12,reaction temperature of 55℃and reaction temperature of 28 h,the prepared precursor products have good particle size distribution,uniform spheroid shape and dense crystallization.The first discharge capacity of the cathode material after calcination is 169.14 mAh/g and the first efficiency is 88.32%under the charge and discharge system of 2.8~4.4 V and 0.2 C.

关 键 词：共沉淀法 三元前驱体 锂电池 正极材料 制备 性能 放电 振实密度 

分 类 号：TF123[冶金工程—粉末冶金]