Investigation of the Effect of Fluoroethylene Carbonate Additive on Electrochemical Performance of Sb-Based Anode for Sodium-Ion Batteries
Investigation of the Effect of Fluoroethylene Carbonate Additive on Electrochemical Performance of Sb-Based Anode for Sodium-Ion Batteries
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氟代碳酸乙烯酯添加剂对钠离子电池锑基负极电化学性能的影响研究
DOI：
10.1016/j.electacta.2015.12.136
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发表时间：
2016-02-01
影响因子：
6.6
通讯作者：
Cao, Yuliang
中科院分区：
文献类型：
--
作者：
Lu, Haiyan;Wu, Lin;Cao, Yuliang
电解液添加剂对钠离子电池合金负极材料的电化学性能有重要影响。本文采用XPS、FTIR、EIS和电化学方法研究了无FeC和含FeC电解液中碳化硅Sb-C电极的表面结构、组成和电化学性能。实验结果表明，FeC确实参与了电极表面SEI膜的形成过程。在对实验数据分析的基础上，提出了双层SEI膜机制，并能很好地解释充放电曲线和交流阻抗谱中观察到的电阻和电位的突变。因此，电解液中FeC的存在可以最大限度地减少电解液的还原分解，改变电极的形态、结构和化学成分，从而提高电极的电化学性能。(C)2015爱思唯尔有限公司。保留所有权利。
The electrolyte additive has significant impact on the electrochemical performance of the alloy anode material for sodium-ion batteries. In this work, the surface structure, component and electrochemical performance of the SiC-Sb-C electrode in FEC-free and -containing electrolyte have been investigated by XPS, FTIR, EIS and electrochemical characterizations. The experimental results suggest that FEC actually participates in the formation process of the SEI films on the surface of the electrode. Based on the analysis of the experimental data, a double-layer SEI film mechanism should be suggested and can well explain the mutation of the resistant and potential observed in the charge/discharge curves and EIS. Therefore, the presence of FEC in the electrolyte can minimize the reductive decomposition of the electrolyte and change the morphology, structure and chemical component of the electrode, resulting in the improvement of the electrochemical performance of the electrode. (C) 2015 Elsevier Ltd. All rights reserved.