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Citation: 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[J]. Acta Physico-Chimica Sinica, ;2008, 24(07): 1302-1306. doi: 10.3866/PKU.WHXB20080731 shu

Electrochemical Behaviors of Et4NBF₄+LiPF₆/EC+PC+DMC Electrolyte on Graphite Electrode

1.
School of Metallurgical Science and Engineering, Central South University, Changsha 410083, P. R. China

Received Date: 28 December 2007
Available Online: 4 May 2008

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.
- Li-ion battery; Eectrolyte; Blend salt; Et4NBF4; SEI film
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沈阳化工大学材料科学与工程学院沈阳 110142

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通讯作者: 陈斌, bchen63@163.com

Electrochemical Behaviors of Et4NBF₄+LiPF₆/EC+PC+DMC Electrolyte on Graphite Electrode