Effect of calcination temperature on characteristics of LiNi1/3Co1/3Mn1/3O2 cathode for lithium ion batteries

• Published in: Transactions of Nonferrous Metals Society of China Vol. 17; no. 6; pp. 1307 - 1311
• Main Author: 郭华军 梁如福 李新海 张新明 王志兴 彭文杰 王朝
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2007; School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China%School of Materials Science and Engineering, Central South University, Changsha 410083, China
• Subjects: cathode; LiNi1/3Co1/3Mn1/3O2; lithium ion battery; sol-gel; 锂离子电池; LiNi1/3Co1/3Mn1/3O2; cathode; lithium ion battery; sol-gel
• ISSN: 1003-6326
• DOI: 10.1016/s1003-6326(07)60267-2

LiNi1/3Co1/3Mn1/3O2 was synthesized by sol-gel method and effect of calcination temperature on characteristics of LiNi1/3Co1/3Mn1/3O2 cathode was investigated. The structure and characteristics of LiNi1/3Co1/3Mn1/3O2 were determined by XRD, SEM and electrochemical measurements. The results show that the compound LiNi1/3Co1/3Mn1/3O2 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 LiNi1/3Co1/3Mn1/3O2 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.