新一代固溶体富锂正极材料xLi2MnO3·(1-x)LiMO2(M=Co, Fe, Ni1/2Mn1/2…)具有高比容量、优秀的循环能力以及新的电化学充放电机制, 可能被用做新型高比能量锂离子电池正极材料. 本文介绍了富锂正极材料的结构、合成方法、电化学性能研究, 探讨了影响其电化学性能的若干因素. 并对其进行的各种改性研究进行了概述, 分析总结了不同富锂正极材料所具有的特性和发展趋势.
A new generation of Li-rich solid solution materials is cathode material xLi2MnO3·(1-x)LiMO2 (M= Co, Fe, Ni1/2Mn1/2…) because of its excellent electrochemical performance. The series of Li-rich cathode material exhibits high capacity and excellent cycleability, which may be associated with a new electrochemical charge-discharge mechanism, It is proposed to satisfy the high energy Li-ion batteries. The structure, synthesis methods and electrochemical properties of the Li-rich cathode materials were reviewed in this paper. The factors affecting the electrochemical properties of the cathode materials were discussed, and the recent research progress on improving the electrochemical performance of Li-rich cathode materials was summarized. In addition, the characteristics and the trend of different Li-rich cathode materials were described.
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