容量型锂离子电池正极材料LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2的合成

Synthesis of High-capacity LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2 Lithium Ion Battery Cathode Material

采用共沉淀法合成Ni_(0.5)Co_(0.2)Mn_(0.3)(OH)_2前驱体,将前驱体和LiOH混合均匀后经高温煅烧合成了锂离子电池正极材料LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2,并对其进行电化学性能检测。试验表明,制备的电池在电压2.8～4.3V(vs.Li/Li+)区间内,0.1C倍率下的首次库伦效率为88.4%;在1C倍率下循环100次后,放电比容量为157.7mAh/g,容量保持率为96.6%。

High-capacity LiNi0.5Co0.2Mn0.3O2 lithium ion battery cathode material precursor was synthesized by sintering technique mixed with LiOH and Ni0.5Co0.2Mn0.3（OH）2 prepared by Co-precipitation Method in a certain proportion.Electrochemical properties of LiNi0.5Co0.2Mn0.3O2 were investigated.The results indicate that the prepared battery has excellent electrochemical performances at 2.8～4.3 V（vs.Li/Li＋）.The initial coulombic efficiency is 88.4%at 0.1 Crate.The capacity retention after 100 cycles is 96.6%at1 Crate with specific capacity of 157.7 mAh/g.