摘要
采用共沉淀法制备了三元材料LiNi0.4Co0.2Mn0.4O2,掺杂不同比例铷进行改性,对其进行了结构表征,考察了其电化学性能.结果表明,Li0.97Rb0.03Ni0.4Co0.2Mn0.4O2样品的结晶度较好,铷掺杂起到了稳定三元材料晶体结构的作用,有效改善了材料的电化学性能,5C倍率下放电比容量达130 m A×h/g.
LiNi0.4Co0.2Mn0.4O2 was prepared by coprecipitation method and different proportions of rubidium cations were doped into the materials to enhance the performance. The materials were characterized and the electrochemical performance was investigated. The results showed that the optimized formula is Li0.97Rb0.03Ni0.4Co0.2Mn0.4O2, which obtained an improved electrochemical performance. The incorporation of rubidium can stabilize the crystal structure. The specific reversible capacity of Li0.97Rb0.03Ni0.4Co0.2Mn0.4O2 electrode can still maintain about 130 mA-h/g at 5C.
作者
李妍
汪小平
张维民
何雨石
马紫峰
Yan LI;Xiaoping WANG;Weimin ZHANG;Yushi HE;Zifeng MA(Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiaotong University, Shanghai 200240, China;Shanghai Ruge Technology Development Co., Ltd., Shanghai, 200433, China)
出处
《过程工程学报》
CAS
CSCD
北大核心
2018年第2期422-426,共5页
The Chinese Journal of Process Engineering
