摘要
综述了近年来有关高电位正极材料LiMxMn2-xO4和Li2MxMn4-xO8及LiMxV2-xO4(M代表过渡金属)的研究进展。过渡金属M的氧化是产生5V电位的原因。除容量很低的LiMxMn2-xO4外,随着M含量的增加,5V平台的容量增加,4V平台的容量下降。为了得到性能优良的高电位正极材料,需进一步提高电解质的稳定性和解决因析氧引起的安全问题,驾驶对5V平台的电化学反应机理和制备工艺-结构-电化学性能间的规律的研究。
Recent research progress on high-voltage cathode materials, including LiM_xMn_(2-x)O_4, Li_2M_xMn_(4-x)O_8 and LiM_xMn_(2-x)O_4 (M stands for 3d-transition metal) was reviewed. The plateau around 5 V is associated with the oxidation of M. Except for LiM_xMn_(2-x)O_4 with lower capacity, the capacity at about 4 V decreases and that at about 5 V increases with the increasing of the content of M. In order to improve the performance of the materials, more intensive efforts should be devoted to improve the stability of electrolyte, solve the problem of safety caused by oxygen emerging, research the electrochemistry at about 5 V, and study the rule between preparation, structure and electrochemical performance.
出处
《中国锰业》
2004年第2期17-21,共5页
China Manganese Industry
基金
广西区教育厅课题 (挂教科研 [2 0 0 3 ]2 2号 )
