摘要
为获得无钴高镍正极材料LiNi_(0.6)Mn_(0.4)O_(2)(NM64)的最佳合成方法,采用水热法和共沉淀法对其进行制备,确定共沉淀法为NM64材料的较佳制备方法。为进一步提高共沉淀法制备的NM64材料(下称“NM64-C”)的倍率性能和循环性能,采用Ce离子掺杂对NM64-C进行了优化。结果表明:摩尔比为0.02的Ce离子(0.02Ce)掺杂的NM64-C材料在0.3 C下100次循环后的容量保留率为79.5%,明显优于基材NM64-C(63.9%)。0.02Ce掺杂的NM64-C材料展现出了良好的电化学性能。
In order to obtain the optimal synthesis method of cobalt-free high-nickel cathode material LiNi_(0.6)Mn_(0.4)O_(2)(NM64),hydrothermal method and co-precipitation method were used to prepare NM64,and the optimal synthesis method of NM64 was determined as co-precipitation.In order to further improve the rate performance and cycling performance of NM64 material prepared by co-precipitation method(NM64-C),Ce ion doping was used to optimize NM64-C.The results show that the capacity retention rate of NM64-C with 0.02 molar ratio of Ce ion doping(0.02Ce)is 79.5%after 100 cycles at 0.3 C,which is significantly higher than that of pure NM64-C(63.9%).The NM64-C material doped with 0.02Ce exhibits excellent electrochemical performance.
作者
袁盛旭
李豪
邓伟锋
李劲超
张亚萍
段浩
YUAN Shengxu;LI Hao;DENG Weifeng;LI Jinchao;ZHANG Yaping;DUAN Hao(School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;State Key Laboratory of Environment-friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Sichuan Langsheng New Energy Technology Co.,Ltd.,Suining 629200,Sichuan,China)
出处
《西南科技大学学报》
CAS
2023年第2期1-8,共8页
Journal of Southwest University of Science and Technology
基金
国家自然科学基金(21878250)
射洪经济技术开发区管委会基金(21zh0226)
西南科技大学博士基金(18zx7133)。
关键词
无钴高镍正极材料
铈离子掺杂
锂离子电池
Cobalt-free high-nickel cathode material
Ce ion doping
Lithium ion battery
