Synthesis and characterization of LiNi0.45Co0.10Mn0.45O2 cathode for lithium ion batteries

来源期刊:中国有色金属学报(英文版)2005年第5期

论文作者:郭华军 张明 李新海 张新明 王志兴 彭文杰 胡敏

文章页码:1185 - 1189

Key words:lithium ion battery; LiNi0.45Co0.10Mn0.45O2; cathode; capacity

Abstract: LiNi0.45Co0.10Mn0.45O2 was prepared from Li2CO3 and a triple oxide of nickel, cobalt and manganese at 950℃ in air. The structure and characteristics of LiNi0.45Co0.10Mn0.45O2 were determined by XRD, SEM and electrochemical measurements. The compound LiNi0.45Co0.10Mn0.45O2 has layered structure with hexagonal lattice.The individual particles are agglomeration of many little primary particles whose size ranges from 100nm to 200nm. The LiNi0.45Co0.10Mn0.45O2 cathode has excellent electrochemical performances with large reversible specific capacity of 142.5mA·h/g between 2.75V and 4.25V, and good capacity retention of 83.20% after 450 charge/discharge cycles. Capacity of the battery increases with enhancement of charge voltage limit, and a specific discharge capacity of 175.2mA·h/g is obtained when the charge voltage limit is fixed at 4.45V.

基金信息:the National Natural Science Foundation of China

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