磷酸三甲酯和碳酸亚乙烯酯对锂离子电池的复合作用

电化学（中英文） ›› 2006, Vol. 12 ›› Issue (4): 388-393.

磷酸三甲酯和碳酸亚乙烯酯对锂离子电池的复合作用

唐致远;贺艳兵;宋全生;陈玉红;刘元刚;刘强;

天津大学化工学院应用化学系,天津大学化工学院应用化学系,天津大学化工学院应用化学系,天津大学化工学院应用化学系,天津大学化工学院应用化学系,天津大学化工学院应用化学系天津300072,天津300072,天津300072,天津300072,天津300072,天津300072

收稿日期:2006-11-28 修回日期:2006-11-28 出版日期:2006-11-28 发布日期:2006-11-28

Synergistic Functions of Trimethl Phosphate and Vinylene Carbonate as Additives for the Li-ion Batteries

TANG Zhi-yuan~*,HE Yan-bing,SONG Quan-sheng,CHEN Yu-hong,LIU Yuan-gang,LIU Qiang

(Applied Chemistry Department,College of Chemical Engineering,Tianjin University,Tianjin 300072,China

Received:2006-11-28 Revised:2006-11-28 Published:2006-11-28 Online:2006-11-28

摘要/Abstract

摘要： 应用循环伏安、交流阻抗、扫描电子显微镜和锂离子电池性能检测装置研究了阻燃添加剂磷酸三甲酯(TMP)和成膜添加剂碳酸亚乙烯酯(VC)对锂离子电池的复合作用.结果表明,复合使用TMP和VC不仅能提高电池的安全性而且能改善电池的循环性能,原因可能是在电池首次充放电过程中VC优先还原,还原产物在负极表面聚合形成良好的SEI膜,有效地制约了因TMP在石墨负极表面的分解而造成负极石墨的脱落,同时提高了SEI膜的稳定性.

关键词: 锂离子电池, 磷酸三甲酯(TMP), 碳酸亚乙烯酯(VC), SEI膜

Abstract: The cooperative effects of trimethl phosphate and vinylene carbonate as additives for Li-ion batteries are investigated by using the cyclic voltammetry,electrochemical impedance spectroscopy and scanning electronic micro-photographs.The results show that the combination application of TMP and VC as additives for Li-ion batteries not only enhances safety of the batteries,but also improves their cycling performance.The reason may be ascribed to firstly VC being reduced and the reduction product polymerized to form excellent solid electrolyte interface(SEI) layer on the surface of graphite electrode during the first charge and discharge process,which prevents effectively the decomposition of TMP on the surface of the graphite electrode that leads to exfoliation of graphite electrode,at same time,improves the stability of SEI.

Key words: Li-ion battery, Trimethl phosphate(TMP), Vinylene carbonate(VC), Solid electrolyte interphase(SEI)

中图分类号:

TM912

唐致远;贺艳兵;宋全生;陈玉红;刘元刚;刘强;. 磷酸三甲酯和碳酸亚乙烯酯对锂离子电池的复合作用[J]. 电化学（中英文）, 2006, 12(4): 388-393.

TANG Zhi-yuan~*,HE Yan-bing,SONG Quan-sheng,CHEN Yu-hong,LIU Yuan-gang,LIU Qiang. Synergistic Functions of Trimethl Phosphate and Vinylene Carbonate as Additives for the Li-ion Batteries[J]. Journal of Electrochemistry, 2006, 12(4): 388-393.

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https://electrochem.xmu.edu.cn/CN/Y2006/V12/I4/388

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