LiNi_(0.9)Co_(0.1)O_2材料的制备及其电化学性能研究

Abstract

成功采用掺杂和改变前驱体两种方式同时对传统lInIO2正极材料合成进行改进,即用掺杂10%WTCO的β-nIOOH作为前驱体,和lIOH·H2O在空气中进行固相烧结。通过正交方法优化出合成lInI0.9CO0.1O2的最佳烧结温度为600℃,烧结时间为24H;此条件下材料首次充放电效率高达86%,20次循环后可逆放电比容量为167MAH/g,容量保持率高达94%。

It is a success for using both doping and changing precursor to improve the traditional cathode material LiNiO2 which is using 10%wt Co doped in the β-NiOOH as the precursor, then solid- phase Sintering with LiOH·H2O in the air.By orthogonal methods we optimize the best sintering temperature is 600 ℃ and sintering time is 24 h for synthesis of the LiNi0.9Co0.1O2; Under these conditions, the first charge and discharge efficiency can be as high as 86%, discharge capacity is to be 167 mAh/g after 20 cycles reversible, and the capacity rates can maintain as high as 94%.