摘要
采用高温固相法合成了掺杂Mg的钴酸锂材料,研究了Mg掺杂量对钴酸锂结构、形貌以及电性能的影响。结果表明,掺Mg后的钴酸锂样品电化学性能得到改善。当Mg掺杂量为0.25%时,钴酸锂样品的综合性能表现最好,当充放电电压范围为3~4.4V时,在0.1C倍率下钴酸锂样品的初始放电容量高达168.5 mAh/g,1C循环100次容量保持率为87.5%。
LiCoO2 doped with Mg was synthesized by solid-state method. The effects of Mg dopant content on structure, micro-morphology and electrical properties of LiCoO2 were investigated. The modified LiCoO2 composite exhibits the better electrical properties. The results show that LiCoO2 gives the best combined properties as the Mg dopant content is 0.25%. The initial discharge capacity of the LiCoO2 is as high as 168.5 mAh/g at 0.1C in the voltage range of 3 - 4.4 V and the capacity retention achieves 87.5% after 100 cycles at 1C in the voltage range of 3 - 4.4 V.
出处
《化学工程与技术》
2017年第1期43-47,共5页
Hans Journal of Chemical Engineering and Technology
