新型锰基固溶体正极材料的研究进展

Research Progress of the Novel Manganese-based Solution Materials

锰基固溶体材料是一种Li2MnO3和LiMO2复合结构的新型锂离子电池正极材料,具有比容量高、电压高、能量密度高、原料成本低等优点,可以满足新一代动力电池正极材料的使用要求。目前该材料还存在首次效率低、倍率性能差、低温性能差等缺点,需要通过改进制备方法以及掺杂和包覆等措施进一步进行改善,使其满足实用化要求。简要阐述了锰基固溶体的结构、电化学反应机理及国内外研究现状。

The Mn based solution material is a novel li-ion battery cathode material based on the composite structure between Li2 MnO3, and LiMO2. It has some advantages such as high capacity, high voltage, high energy densi- ty and low cost,which could be one of candidates in the next generation cathode materials. But there are also many problems about the materials, such as lower first discharge efficiency, worse rate property and low temperature proper ty, and they are needed to be improved by advanced preparing methods,doping and coating methods. Now the struc ture,electrochemical reaction mechanism and research progress of Mn-based solution materials are introduced briefly.