Lithium rich layered oxides (LLOs) are attractive cathode materials for Li-ion batteries owing to their high capacity (>250 mA h g^–1) and suitable voltage (∼3.6 V). However, they suffer from serious voltage and capacity fading, which is focused in this review. First, an overview of crystal structure, band structure and electrochemical performances of LLOs is provided. After that, current understanding on oxygen loss, capacity fading and voltage fading is summarized. Finally, five strategies to mitigate capacity and voltage fading are reviewed. It is believed that these understandings can help solve the fading problems of LLOs.

中文翻译：

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富锂层状氧化物：结构、容量和电压衰减机制及解决策略

富锂层状氧化物（LLO）具有高容量（>250 mA h g ^–1）和合适的电压（~3.6 V），是锂离子电池的有吸引力的正极材料。然而，它们遭受严重的电压和容量衰减，这是本次审查的重点。首先，概述了 LLO 的晶体结构、能带结构和电化学性能。之后，总结了目前对氧损失、容量衰减和电压衰减的理解。最后，回顾了减轻容量和电压衰减的五种策略。相信这些理解有助于解决LLO的衰落问题。