Effect of Fluoroethylene Carbonate Additive on Low Temperature Performance of Li-Ion Batteries

Bingxiao Liu, Bing Li, S. Guan
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引用次数: 60

Abstract

The effects of Fluoroethylene carbonate (FEC) on the low temperature performance of Li-ion batteries were evaluated. By addition of 2 v% FEC into a commercial ternary electrolyte, the initial lithium intercalation capacity (graphite/Li model cell) was remarkably improved by approximately 50% and the voltage plateau of the cell was lowered by about 0.2 V at −20°C. This is maybe attributed to a reduced charge transfer resistance and a lowered SEI film resistance with a richer LiF phase formed on the graphite electrode by Tafel polarization, AC impedance and X-ray photoelectron spectroscopy (XPS) analysis.
碳酸氟乙烯添加剂对锂离子电池低温性能的影响
研究了氟乙烯碳酸酯(FEC)对锂离子电池低温性能的影响。在商用三元电解液中加入2v % FEC,石墨/锂模型电池的初始锂插入容量显著提高了约50%,电池在−20℃时的电压平台降低了约0.2 v。这可能是由于通过Tafel极化、交流阻抗和x射线光电子能谱(XPS)分析,石墨电极上形成了更丰富的liff相,从而降低了电荷转移电阻和SEI膜电阻。
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来源期刊
Electrochemical and Solid State Letters
Electrochemical and Solid State Letters 工程技术-材料科学:综合
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1.9 months
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