Measurement and Correlation of the Electrical Conductivity
of the Ionic Liquid [BMIM][TFSI] in Binary Organic Solvents
Posted on 2018-03-26 - 18:27
In this paper, the electrical conductivities
of ionic liquid 1-butyl-3-methylimidazolium
bis[(trifluoromethyl)sulfonyl]imide ([BMIM][TFSI]) in mixed organic
solvents of propylene carbonate (PC) + γ-butyrolactone (GBL)
and ethylene carbonate (EC) + dimethyl carbonate (DMC) were measured.
The effects of mixed organic solvents with different ratios (1:0,
2:1, 1:1, 1:2, 0:1) on the electrical conductivity of ionic liquid
were investigated. The organic solvents EC and DMC have a synergistic
effect for the electrical conductivity of [BMIM][TFSI]–EC/DMC,
and the optimal ratio of EC to DMC is 1:1; however, the organic solvents
have no synergistic effect in [BMIM][TFSI]–PC/GBL. The concentration
dependence of the electrical conductivity of the solution can be well
fitted by the empirical Casteel–Amis equation. The effects
of temperature on electrical conductivity can be described by the
Vogel–Tamman–Fulcher (VTF) equation and the Arrhenius
equation. The IL concentration dependence of the activation energy Ea and the pre-exponential factor A in the Arrhenius equation were also investigated, and fitted by
empirical equations. On the basis of the VTF equation and the Arrhenius
equation, a quasi-Arrhenius equation was proposed to describe the
effects of temperature and composition on the electrical conductivity
simultaneously in binary systems and ternary systems, and the correlation
results agree well with the experimental results.
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Fu, Yanli; Cui, Xianbao; Zhang, Ying; Feng, Tianyang; He, Jie; Zhang, Xuemei; et al. (2018). Measurement and Correlation of the Electrical Conductivity
of the Ionic Liquid [BMIM][TFSI] in Binary Organic Solvents. ACS Publications. Collection. https://doi.org/10.1021/acs.jced.7b00646
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AUTHORS (8)
YF
Yanli Fu
XC
Xianbao Cui
YZ
Ying Zhang
TF
Tianyang Feng
JH
Jie He
XZ
Xuemei Zhang
XB
Xue Bai
QC
Qinglong Cheng