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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received June 30, 2008
Accepted December 12, 2008

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Physical and electrochemical properties of lithium-doped 1-butyl-3-methylimidazolium salts

Ki-Sub Kim^†

Department of Chemical and Biological Engineering, Chungju National University, 72, Daehak-ro, Chungju, Chungbuk 380-702, Korea

kks1114@cjnu.ac.kr

Korean Journal of Chemical Engineering, May 2009, 26(3), 770-774(5), 10.1007/s11814-009-0129-3

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Abstract

Two well known room temperature ionic liquids (RTILs), 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm][BF4]) and 1-butyl-3-methylimidazolium iodide ([BMIm][I]), were synthesized. Their physical properties such as reflective indices, densities, viscosities, heat capacities, and heats of dilution were measured. The overall properties of [BMIm][BF4] obtained after two-step reactions were superior to those of the IL with a halide anion. The incorporation_x000D_ of lithium ions using lithium tetrafluoroborate (LiBF4) in each IL was carried out and ionic conductivities as a function of temperature and Li ion concentration were investigated. The isothermal conductivity graph showed a parabolic curve shape suggesting that the maximum values exist at a specific concentration condition while they continuously increased as the temperature increased. The conductivities reached as high as 10^(-3) S·cm-1.

Keywords

Physical Properties Electrochemical Properties Ionic Liquid Li-doped Ionic Liquids

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