煅烧温度对锂离子正极材料Li[Ni_(0.475)Mn_(0.475)Co_(0.05)]O_2结构和电化学性能的影响

Calcined Temperatures Influence on Synthesis and Electrochemistry Charactarization of Li[Ni_(0.475)Mn_(0.475)Co_(0.05)]O_(2) for Li-ion Batteries

应用高温固相合成法制备Li[Ni0.475Mn0．475Co0.05]O2．XRD，SEM，循环伏安及充放电容量测试表明，在800℃下煅烧合成的样品具有较高的嵌锂容量和良好的循环稳定性，如在20mA／g和2．3-4．6V的电压范围内，其首次放电比容量为178．8mAh／g，循环30周后放电比容量仍能达到150．2mAh／g，容量损失16．0％．

Layered Li[ Ni0.475Mn0.475Co0.05 ]O2 materials have been prepared by a solid-state pyrolysis method. Experiments of XRD, SEM, cyclic voharnmetry and charge/discharge cycling were carried out. It can be learned that when calclined at 800℃, the sample showed the highest first discharge capacity of 178.8 mAh·g^-1 at a current density of 20 mA/g in the voltage range 2.3 - 4.6 V.