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Xilin Chen, Xiaolin Li, Donghai Mei, Ju Feng, Mary Y. Hu, Jianzhi Hu, Mark Engelhard, Jianming Zheng, Wu Xu, Jie Xiao, Jun Liu and Ji-Guang Zhang Reduction Mechanism of Fluoroethylene Carbonate for Stable Solid–Electrolyte Interphase Film on Silicon Anode ChemSusChem 7

Version of Record online: 25 NOV 2013 | DOI: 10.1002/cssc.201300770

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To protect and serve: The mechanism by which the electrolyte additive fluoroethylene carbonate (FEC) protects anode materials is proposed. 1) FEC is reduced through the opening of the five-membered ring leading to the formation of lithium poly(vinyl carbonate), LiF, and some dimers; 2) the FEC-derived lithium poly(vinyl carbonate) enhances the stability of the SEI film. The proposed reduction mechanism could help identify new electrolyte additives.

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