Vinyl ethylene carbonate as an additive to ionic liquid electrolyte for lithium ion batteries

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• 作者：Yanbao Fu ; Cheng Chen ; Chenchen Qiu and Xiaohua Ma
• 关键词：Vinyl ethylene carbonate ; Solid electrolyte interface ; Ionic liquid ; Cyclic voltammetry ; Additives ; Lithium ion batteries
• 刊名：Journal of Applied Electrochemistry
• 出版年：2009
• 出版时间：December, 2009
• 年：2009
• 卷：39
• 期：12
• 页码：2597-2603
• 全文大小：434.1 KB

文摘

In this research, we investigated the potential application of vinyl ethylene carbonate (VEC) and ethylene carbonate (EC) as solid electrolyte interface (SEI) film-forming additive in 1-ethyl-3-methylimidazolium (EMI)-bis(trifluoromethyl-sulfonyl) imide (TFSI)-LiTFSI ionic liquid electrolyte (IL). The electrochemical performance of natural graphite (NG7) was studied in LiTFSI/EMI-TFSI containing different weight percent of EC/VEC via cyclic voltammetry (CV), electrochemical impedance spectrum (EIS), and galvanostatic charge/discharge cycles. Temperature effect on the discharge/charge performance of NG7 electrode in the researched IL electrolyte was also discussed.