A High Precision Study of the Effect of Vinylene Carbonate (VC) Additive in Li/Graphite Cells

被引：69
|
作者：
Xiong, Deijun [1 ,2 ]
Burns, J. C. [1 ]
Smith, A. J. [1 ]
Sinha, Nupur [1 ]
Dahn, J. R. [1 ]
机构：
[1] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada
[2] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2011年 / 158卷 / 12期
基金：
加拿大自然科学与工程研究理事会;
关键词：
LITHIUM-ION BATTERIES; LI-ION; ELECTROLYTE; COULOMETRY; ANODE;
D O I：
10.1149/2.100112jes
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Li/graphite coin cells containing different amounts of vinylene carbonate (VC) electrolyte additive were examined at different temperatures using the High Precision Charger at Dalhousie University. The charge endpoint capacities as well as the coulombic efficiency (CE) were compared to characterize the effect of the VC additive on the graphite electrode. The experiments show that VC improves the coulombic efficiency and reduces charge and discharge endpoint slippage at 50 and 60 degrees C. However, the addition of VC has little evident effect on the performance of the graphite electrode at 30 and 40 degrees C and also increases the irreversible capacity. By contrast, additions of VC have a marked impact on the coulombic efficiency and slippages of NMC positive electrodes, even at 30 degrees C. (C) 2011 The Electrochemical Society. [DOI: 10.1149/2.100112jes]
引用
收藏
页码：A1431 / A1435
页数：5
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