锂离子电池高电压正极材料LiNi0.5Mn1.5 O4的进展

Progress in LiNi0.5Mn 1.5 O4 high voltage cathode material for Li-ion battery

简述LiNi 0.5 Mn 1.5 O 4的合成方法,如固相法、共沉淀法和水热法等,详细综述LiNi 0.5 Mn 1.5 O 4正极材料的体相掺杂和表面包覆改性对电荷转移电阻、扩散系数的影响,以及电化学性能的改善作用。指出LiNi 0.5 Mn 1.5 O 4正极材料目前需要解决的结构不稳定、易与电解液发生副反应等问题,并指出研究的方向:掺杂和包覆。

The synthesis methods of LiNi 0.5 Mn 1.5 O 4,such as solid phase method,coprecipitation method,hydrothermal method were briefly described.The effects of bulk doping and surface coating modification on the charge transfer resistance,diffusion coefficient and electrochemical performance of LiNi 0.5 Mn 1.5 O 4 cathode materials were reviewed in detail.It was pointed out that the current problems of LiNi 0.5 Mn 1.5 O 4 cathode materials were unstable in structure and prone to side reactions with electrolyte and the research direction were doping and coating.