Lithium-rich layered oxide materials xLi₂MnO₃·(1 − x)LiMO₂ (M = Mn, Co, Ni, Fe, Cr, etc.) are promising cathode candidates for high energy Li-ion batteries because of their high specific capacities (>250 mA h g⁻¹) and reasonable working voltage. The high capacity comes from the activation of inactive Li₂MnO₃ in the high voltage range (>4.5 V). However, many adverse factors appear along with the activation process, such as low initial coulombic efficiency and severe capacity and voltage fading during cycling, which limit the commercialization of Li-rich materials. This review based on existing research on the electrochemistry of Li-rich materials presents an introduction to the reaction mechanism, challenges and strategies and prospects.

中文翻译：

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富锂层状氧化物材料电化学反应研究进展

富锂层状氧化物材料x Li ₂ MnO ₃ ·(1 − x )LiMO ₂（M = Mn、Co、Ni、Fe、Cr等）是高能锂离子电池的有前途的阴极候选材料，因为它们具有高比容量（>250 mA hg ^-1）和合理的工作电压。高容量来自惰性 Li ₂ MnO ₃的活化在高压范围内 (>4.5 V)。然而，随着活化过程出现许多不利因素，如初始库仑效率低、循环过程中严重的容量和电压衰减，限制了富锂材料的商业化。本综述基于对富锂材料电化学的现有研究，介绍了反应机理、挑战、策略和前景。