Effect of calcination temperature on characteristics of LiNi_1/3Co_1/3Mn_1/3O₂ cathode for lithium ion batteries

来源期刊：中国有色金属学报(英文版)2007年第6期

论文作者：郭华军 梁如福 李新海 张新明 王志兴 彭文杰 王朝

文章页码：1307 - 1311

Key words：lithium ion battery; LiNi_1/3Co_1/3Mn_1/3O₂; sol-gel; cathode

Abstract: LiNi_1/3Co_1/3Mn_1/3O₂ was synthesized by sol-gel method and effect of calcination temperature on characteristics of LiNi_1/3Co_1/3Mn_1/3O₂ cathode was investigated. The structure and characteristics of LiNi_1/3Co_1/3Mn_1/3O₂ were determined by XRD, SEM and electrochemical measurements. The results show that the compound LiNi_1/3Co_1/3Mn_1/3O₂ has layered structure with hexagonal lattice. With the increase of calcination temperature, the basicity of the material decreases, and the size of primary particle rises. The LiNi_1/3Co_1/3Mn_1/3O₂ calcined at 900 ℃ for 12 h shows excellent electrochemical performances with large reversible specific capacity of 157.5 mA·h/g in the voltage range of 2.75-4.30 V and good capacity retention of 94.03% after 20 charge/discharge cycles. Capacity of LiNi1/3Co1/3Mn1/3O2 increases with enhancement of charge voltage limit, and specific discharge capacities of 179.4 mA·h/g, 203.1 mA·h/g are observed when the charge voltages limit are fixed at 4.50 V and 4.70 V, respectively.

基金信息：the National Basic Research Program of China
the Postdoctoral Science Foundation of China