Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 19 No. 6 December 2009|
（1. Department of Material and Chemistry, Guilin University of Technology, Guilin 541004, China;
2. Key Laboratory of New Processing Technology for Nonferrous Metals and Materials,
Ministry of Education, Guilin University of Technology, Guilin 541004, China）
Abstract:LiNi0.6Co0.2Mn0.2O2 was prepared from LiOH·H2O and MCO3 (M=Ni, Co, Mn) by co-precipitation and subsequent heating. XRD, SEM and electrochemical measurements were used to examine the structure, morphology and electrochemical characteristics, respectively. LiNi0.6Co0.2Mn0.2O2 samples show excellent electrochemical performances. The optimum sintering temperature and sintering time are 850 ℃ and 20 h, respectively. The LiNi0.6Co0.2Mn0.2O2 shows the discharge capacity of 148 mA∙h/g in the range of 3.0−4.3 V at the first cycle, and the discharge capacity remains 136 mA∙h/g after 30 cycles. The carbonate co-precipitation method is suitable for the preparation of LiNi0.6Co0.2Mn0.2O2 cathode materials with good electrochemical performance for lithium ion batteries.
Key words: lithium ion batteries; LiNi0.6Co0.2Mn0.2O2; cyclic voltammogram (CV)