Vinylene Carbonate Modified 1-Butyl-3-Methyle-Imidazolium Tetrafluoroborate Ionic Liquid Mixture as Electrolyte

被引：0

作者：

Wang, Hongmei ^{[1
,2
]}

Liu, Suqin ^{[1
]}

Wang, Nanfang ^{[1
]}

Liu, Younian ^{[1
]}

机构：

[1] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China

[2] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2012年 / 7卷 / 08期

关键词：

Ionic liquid; electrolyte; Li-ion battery; lithium iron phosphate; LITHIUM SECONDARY BATTERIES; TEMPERATURE MOLTEN-SALT; LI-ION; GRAPHITE; PERFORMANCE; INSERTION;

D O I：

暂无

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Vinylene carbonate (VC) has higher reduction potential than that of 1-butyl-3-methyl-imidazolium tetrafluoroborate (BMIMBF4) and can form solid electrolyte interface (SEI) film on lithium (Li) metal surface. VC modified the mixed electrolyte based on BMIMBF4 and gamma-butyrolactone (gamma-BL) has been investigated. The result indicates that the optimized mixed electrolyte, gamma- BL / BMIMBF4 (70/30, volume ratio) -1 M LiBF4, has high conductivity(14.87 mS cm(-1)) at 25 degrees C. Electrochemical impedance spectroscopy discloses that the addition of VC improves the compatibility of the mixed electrolyte towards lithium anodes and enhances the formation of SEI film to protect lithium anodes from corrosion. Accordingly, the Li/LiFePO4 battery with VC modified the BMIMBF4/gamma-BL - 1 M LiBF4, has a high discharge capacity of 123.1 mAh g(-1) without any considerable fading during the first 20 cycles at a current density of 0.1C.

引用

页码：7579 / 7586

页数：8

共 36 条

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