作为下一代高比能锂离子电池正极材料的有力竞争者,富锂过渡金属氧化物xLi2MnO3·(1-x)LiMO2(M=Ni,Co或Mn)相对于传统的锂离子电池正极材料而言,具有比容量高的显著优势(可超过300mAh/g),因此近年来得到了广泛关注。本文对富锂过渡金属氧化物xLi2MnO3·(1-x)LiMO2(M=Ni,Co或Mn)近几年的研究进展进行了总结,对该类材料的晶体结构特征以及首次充放电机理、不同合成方法的发展以及电化学性能的改善进行了评述,并对这类材料今后的发展方向提出了思考。
As a promising candidate of the cathode materials for the next generation of high energy density lithium-ion batteries, the Li-rich transition metal oxide xLi2MnO3·(1-x)LiMO2 (M = Ni, Co or Mn) is superior to the traditional cathode materials for its potential of achieving very high capacity of over 300mAh/g. Therefore, this type of materials is caught more and more attention in recent years. Here we give an overview of recent progress of xLi2MnO3·(1-x)LiMO2 in recent years. The research hotspots, the crystal structure characteristics and the mechanism of initial charge and discharge, the development of various synthesis methods, as well as the improvement of the electrochemical performances for xLi2MnO3·(1-x)LiMO2 (M = Ni, Co or Mn) are commented. The future development trends of the xLi2MnO3·(1-x)LiMO2 (M = Ni, Co or Mn) is put forward.