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Acta Physico-Chimica Sinica  2008, Vol. 24 Issue (07): 1302-1306    DOI: 10.3866/PKU.WHXB20080731
Note     
Electrochemical Behaviors of Et4NBF4+LiPF6/EC+PC+DMC Electrolyte on Graphite Electrode
LI Fan-Qun; LAI Yan-Qing; ZHANG Zhi-An; GAO Hong-Quan; YANG Juan
School of Metallurgical Science and Engineering, Central South University, Changsha 410083, P. R. China
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Abstract  Et4NBF4/LiPF6-based electrolytes were investigated to study the effects of the electrolytes with blend solvent EC+PC+DMC on the interface characteristics of graphite electrode. Cyclic voltammetry (CV) and charge-discharge test were used to examine the compatibility between the electrolytes and graphite anode. FTIR spectroscopy was used to analyze the variational component of the solid electrolyte interface (SEI) film. The results showed that Et4NBF4 was concerned with the formation of SEI film. Irreversible capacity in the first circle remarkably reduced when the concentrations of Et4NBF4 were 0.2 and 0.5 mol·L-1, and the circle efficiencies rose to 76.0% and 81.6%, respectively. LiPF6/Et4NBF4 blend-salt electrolytes system can effectively improve the compatibility between PC-based electrolyte and graphite anode.

Key wordsLi-ion battery      Eectrolyte      Blend salt      Et4NBF4      SEI film     
Received: 28 December 2007      Published: 04 May 2008
MSC2000:  O646  
Corresponding Authors: LAI Yan-Qing     E-mail: 13975808172@126.com
Cite this article:

LI Fan-Qun; LAI Yan-Qing; ZHANG Zhi-An; GAO Hong-Quan; YANG Juan. Electrochemical Behaviors of Et4NBF4+LiPF6/EC+PC+DMC Electrolyte on Graphite Electrode. Acta Physico-Chimica Sinica, 2008, 24(07): 1302-1306.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20080731     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2008/V24/I07/1302

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