Influence of Atmosphere on Electrochemical Performance of LiNi0.8Co0.1Mn0.1O2 Electrodes for Li-Ion Batteries

Ran Wang, Jing Wang*, Shi Chen, Ang Gao, Yuefeng Su, Feng Wu

*此作品的通讯作者

科研成果: 期刊稿件会议文章同行评审

7 引用 (Scopus)

摘要

Ni-rich layered materials have been regarded as competitive candidates for advanced lithium-ion batteries due to their high energy density, relatively low cost and environmentally-friendly nature. However, they suffer from serious degradation of cycling performance after exposing to air during their storage. Here we selected LiNi0.8Co0.1Mn0.1O2 as a typical Ni-rich positive material to study the influence upon exposure to ambient air on surface chemical composition and electrochemical performance. TEM confirms the existence of amorphous surface layer after contacting with atmosphere and the thickness is about 3-4 nm. The fresh LiNi0.8Co0.1Mn0.1O2 sample has capacity retention of 94.6% and 93.3% after 50 cycles at 0.2C and 1C, respectively, comparing to the 91.7% and 82.4% of the exposed sample. The charge-discharge curves and electrochemical impedance spectra indicate that exposure to air lead to increased impedance and polarization, which seriously affects LiNi0.8Co0.1Mn0.1O2 cycling properties. So, it is very important for Ni-rich cathode materials without contacting with atmosphere directly.

源语言英语
文章编号012039
期刊IOP Conference Series: Materials Science and Engineering
301
1
DOI
出版状态已出版 - 15 2月 2018
活动5th Annual International Conference on Material Science and Environmental Engineering, MSEE 2017 - Xiamen, Fujian, 中国
期限: 15 12月 201717 12月 2017

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Wang, R., Wang, J., Chen, S., Gao, A., Su, Y., & Wu, F. (2018). Influence of Atmosphere on Electrochemical Performance of LiNi0.8Co0.1Mn0.1O2 Electrodes for Li-Ion Batteries. IOP Conference Series: Materials Science and Engineering, 301(1), 文章 012039. https://doi.org/10.1088/1757-899X/301/1/012039