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 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.
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Kim, KS. Physical and electrochemical properties of lithium-doped 1-butyl-3-methylimidazolium salts. Korean J. Chem. Eng. 26, 770–774 (2009). https://doi.org/10.1007/s11814-009-0129-3
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DOI: https://doi.org/10.1007/s11814-009-0129-3