Electrochemical properties of room temperature ionic liquids incorporating BF_4^- and TFSI^- anions as green electrolytes

作     者：ZHANG Zhengxi GAO Xuhui YANG Li 

作者机构：School of Chemistry and Chemical Technology. Shanghai Jiaotong University Shanghai 200240 China 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2005年第50卷第18期

页      面：2005-2009页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

主　　题：电气化学 电解液 离子溶液 空间温度 传导性 

摘      要：Two series of room temperature ionic liquids, 1-alkyl-3-methylimidazolium tetrafluoroborate and 1-alkyl- 3-methylimidazolium bis(trifluoromethylsulfonyl)imide (n = 2―4) as electrolytes were prepared and fundamental elec-trochemical properties of the neat ionic liquids and those mixed with an organic solvent (EC-DMC-DEC, 1:1:1, mass ratio) were investigated. It was found that the Arrhenius equation is approximately fit for the relationship between conductivity and temperature for neat ionic liquids within lower temperature range (298―323 K). The VTF interpreta-tion describes the conductivity temperature dependence for the ionic liquids containing tetrafluoroborate anion more accurately than those containing bis(trifluoromethylsulfon- yl)imide anion within wider temperature range. The poten-tial windows are approximately 4.0 V for all these ionic liq-uids. Conductivities of the mixed electrolytes show a maxi-mum value as the solution concentrations increase.