钴包埋镍酸锂的Mg掺杂改性研究  

Research on Mg-doping LiNiO_2 coated with Co

作　　者：李月涛 李刚 王茹英 刘庆国[1,2] 

机构地区：[1]赵县强能电源有限公司,河北石家庄051530 [2]北京科技大学固体电解质研究室,北京100083

出　　处：《电池工业》2010年第6期348-350,共3页Chinese Battery Industry

摘　　要：采用化学共沉淀法,得到不同比例的Mg和Ni均匀分布的氢氧化物沉淀,再以此为核,用Co(OH)2进行包覆,得到前驱体,和LiOH.H2O混合均匀后,经过高温煅烧得到不同镁含量的LiNi0.92-xMgxCo0.08O2正极材料,研究了不同比例Mg2+掺杂对钴包埋镍酸锂材料电性能的影响,结果表明,掺杂量x为0.005时,其1C放电比容量高达183.7mAh/g,循环100次的容量保持率为97.60%,循环性能较佳。The precusor of LiNi0.92-xMgxCo0.08O2 was prepared by co-precipitation method,in which the spherical Ni0.92-xMgx（OH）2 grains were coated with Co（OH）2.The precursor was mixed with LiOH·H2O and the mixture was sintered at high temperature.The effect of Mg2＋ doping on LiNi0.92-xMgxCo0.08O2 was studied.The results showed that the discharge capacity of LiNi0.92-xMgxCo0.08O2 was 183.7 mAh/g at 1 C when x=0.005,and it had good cyclic performance,its capacity retention was 97.60% after 100 cycles.

关 键 词：锂离子电池 正极材料 镍酸锂 Mg掺杂 循环性能 

分 类 号：TM912.1[电气工程—电力电子与电力传动]