Interfacial Degradation and Optimization of Li‐rich Cathode Materials†,Chinese Journal of Chemistry

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Interfacial Degradation and Optimization of Li‐rich Cathode Materials†
Chinese Journal of Chemistry ( IF 5.5 ) Pub Date : 2020-09-12 , DOI: 10.1002/cjoc.202000387
Yuefeng Su _{1,

2} , Jiayu Zhao _{1,

2} , Lai Chen _{1,

2} , Ning Li _{1,

2} , Yun Lu _{1,

2} , Jinyang Dong _{1,

2} , Youyou Fang _{1,

2} , Shi Chen ₁ , Feng Wu _{1,

2}

Affiliation

High‐energy and safe lithium ion batteries (LIBs) are in increasing need as the rapid development of electronic devices, electric vehicles, as well as energy storage station. Li‐rich oxides have attracted a lot of attention due to their high capacity and low cost as cathode material for LIBs. However, they still suffer from the vulnerable cathode/ electrolyte interface, which presents the huge challenges of surface degradation and gas release, particularly at high state of charge. Some issues of Li‐rich cathode materials, such as moderate cycle stability and voltage decay, are in tight connection with electrode‐electrolyte interfacial side reactions. Research in the area of interfacial degradation mechanism and optimization strategies is of great significance as for Li‐rich cathode, and extensive efforts have been poured. This review aims to understand the degradation mechanism of Li‐rich cathode materials, and summarize the corresponding valuable and effective optimization strategies. Based on these considerations, we also have discussed the remaining challenges and the future research direction.

中文翻译：

富锂阴极材料的界面降解与优化†

随着电子设备，电动汽车以及储能站的迅速发展，对高能，安全的锂离子电池（LIB）的需求日益增长。富锂氧化物由于其高容量和低成本作为LIB阴极材料而备受关注。然而，它们仍然遭受脆弱的阴极/电解质界面的困扰，这带来了表面降解和气体释放的巨大挑战，特别是在高电荷状态下。富锂阴极材料的某些问题，例如适度的循环稳定性和电压衰减，与电极-电解质界面副反应紧密相关。关于界面降解机理和优化策略的研究对于富锂阴极具有重要意义，并且已经进行了广泛的努力。这篇综述旨在了解富锂正极材料的降解机理，并总结相应的有价值和有效的优化策略。基于这些考虑，我们还讨论了剩余的挑战和未来的研究方向。

更新日期：2020-09-12

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