Cyclability evaluation on Si based Negative Electrode in Lithium ion Battery by Graphite Phase Evolution: an operando X-ray diffraction study

Chih Wei Hu, Jyh Pin Chou, Shang Chieh Hou, Alice Hu, Yu Fan Su, Tsan Yao Chen, Wing Keong Liew, Yen Fa Liao, Jow Lay Huang, Jin Ming Chen, Chia Chin Chang

研究成果: Article

2 引文 斯高帕斯(Scopus)

摘要

Artificial graphite (FSN) additive is employed as internal structural label for projecting cyclability of Si material native electrode in a mass ratio of Si/FSN = 1.0 in Li ion battery (LIB). Results of operando X-ray diffraction analysis on Si-FSN negative electrode in LIB demonstrate that one can evaluate the lithiation and delithiation affinity of active material by referring phase transition delay of graphite as affected by experimental splits in a formation process of LIB. We prove that a thin layer of surface amorphous structure and residual lattice strain are formed in Si by high energy ball-milling treatment. Those manipulations improve Li intercalation kinetics and thus enabling a capacity fading of less than 10% (from 1860 to 1650 mAhg−1) for Si negative electrode in 50 cycles. Of utmost importance, this study discloses a robust assessment for revealing mechanism on amorphous and strain related silicide formation and predicting cyclability of negative electrode by quantitative phase evolution rate of FSN additive in LIB.

原文English
文章編號1299
期刊Scientific reports
9
發行號1
DOIs
出版狀態Published - 2019 十二月 1

All Science Journal Classification (ASJC) codes

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    Hu, C. W., Chou, J. P., Hou, S. C., Hu, A., Su, Y. F., Chen, T. Y., Liew, W. K., Liao, Y. F., Huang, J. L., Chen, J. M., & Chang, C. C. (2019). Cyclability evaluation on Si based Negative Electrode in Lithium ion Battery by Graphite Phase Evolution: an operando X-ray diffraction study. Scientific reports, 9(1), [1299]. https://doi.org/10.1038/s41598-018-38112-2