Ni/Co比例对LiCoxNi1-xO2电化学性能的影响

Ni/Co比例对LiCo_xNi_1-xO₂电化学性能的影响

摘要: 采用固相反应法合成了一系列LiCo_xNi_1-xO₂（0≤x≤1）材料,用XRD和电化学实验方法研究了Co³⁺取代Ni³⁺对LiNiO₂材料电化学性能的影响.结果表明,当Ni/Co比例为8:2时材料具有最好电化学性能,比容量可以达到170～180mAh/g,并且具有好的抗过充性能.

Abstract: A series of LiNi_1-xCo_xO₂ (0<x< 1) were synthesized by solid state reaction. The effect of Co³⁺ substitution on Ni³⁺ content was investigated by XRD and electrochemical techniques. It is shown that LiNi_0.8C_0.2O₂ has the best electrochemical performance, delivering specific capacities of 170-180 mAh/g and good over-charge resistance compared with LiNiO₂.