The mechanism of side reaction induced capacity fading of Ni-rich cathode materials for lithium ion batteries

Daozhong Hu, Yuefeng Su, Lai Chen*, Ning Li, Liying Bao, Yun Lu, Qiyu Zhang, Jing Wang, Shi Chen, Feng Wu

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

96 引用 (Scopus)

摘要

Ni-rich cathode materials show great potential of applying in high-energy lithium ion batteries, but their inferior cycling stability hinders this process. Study on the electrode/electrolyte interfacial reaction is indispensable to understand the capacity failure mechanism of Ni-rich cathode materials and further address this issue. This work demonstrates the domain size effects on interfacial side reactions firstly, and further analyzes the inherent mechanism of side reaction induced capacity decay through comparing the interfacial behaviors before and after MgO coating. It has been determined that LiF deposition caused thicker SEI films may not increase the surface film resistance, while HF erosion induced surface phase transition will increase the charge transfer resistance, and the later plays the dominant factor to declined capacity of Ni-rich cathode materials. This work suggests strategies to suppress the capacity decay of layered cathode materials and provides a guidance for the domain size control to match the various applications under different current rates.

源语言英语
页(从-至)1-8
页数8
期刊Journal of Energy Chemistry
58
DOI
出版状态已出版 - 7月 2021

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Hu, D., Su, Y., Chen, L., Li, N., Bao, L., Lu, Y., Zhang, Q., Wang, J., Chen, S., & Wu, F. (2021). The mechanism of side reaction induced capacity fading of Ni-rich cathode materials for lithium ion batteries. Journal of Energy Chemistry, 58, 1-8. https://doi.org/10.1016/j.jechem.2020.09.031