Effect of calcination temperature on characteristics of LiNi1/3Co1/3Mn1/3O2 cathode for lithium ion batteries
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 2.754.30 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.
lithium ion battery LiNi1/3Co1/3Mn1/3O2 sol-gel cathode
GUO Hua-jun LIANG Ru-fu LI Xin-hai ZHANG Xin-ming WANG Zhi-xing PENG Wen-jie WANG Zhao
School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China School of Materials Science and Engineering,Central South University,Changsha 410083,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）