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Oxygen Release Degradation in Li-Ion Battery Cathode Materials: Mechanisms and Mitigating Approaches

机译：锂离子电池阴极材料中的氧气释放降解：机制和缓解方法

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摘要

Widespread application of Li-ion batteries (LIBs) in large-scale transportation and grid storage systems requires highly stable and safe performance of the batteries in prolonged and diverse service conditions. Oxygen release from oxygen-containing positive electrode materials is one of the major structural degradations resulting in rapid capacity/voltage fading of the battery and triggering the parasitic thermal runaway events. Herein, the authors summarize the recent progress in understanding the mechanisms of the oxygen release phenomena and correlative structural degradations observed in four major groups of cathode materials: layered, spinel, olivine, and Li-rich cathodes. In addition, the engineering and materials design approaches that improve the structural integrity of the cathode materials and minimize the detrimental O-2 evolution reaction are summarized. The authors believe that this review can guide researchers on developing mitigation strategies for the design of next-generation oxygen-containing cathode materials where the oxygen release is no longer a major degradation issue.
机译：大规模运输和电网存储系统中的锂离子电池（LIBS）的广泛应用需要在长时间和多样化的服务条件下对电池的高度稳定和安全的性能。含氧的正极材料的氧释放是主要结构降解之一，导致电池的快速容量/电压衰落并触发寄生热失控事件。在此，作者总结了了解在四个主要阴极材料中观察到的氧释放现象和相关结构降解的最新进展：分层，尖晶石，橄榄石和富锂阴极。此外，总结了改善阴极材料的结构完整性的工程和材料设计方法，并最大限度地减少有害的O-2进化反应。作者认为，本综述可以指导研究人员开发减缓策略，用于设计下一代含氧阴极材料，其中氧释放不再是重大降解问题。

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