Conductivity, Viscosity, and Dissolution Enthalpy of LiNTF₂ in Ionic Liquid BMINTF₂

Abstract

The ionic conductivity, relative viscosity, and solution enthalpy of LiNTF(2) and NaNTF(2) solutions in ionic liquid BMINTF(2) have been measured. We observed that the conductivity decreased and the viscosity increased when the Li(+) and Na(+) salts were dissolved in BMINTF(2). We also observed that the dissolution is an exothermic process with a solution enthalpy of approximately -18.07 ± 4.61 kJ/mol. The experimental results indicate that the Li(+) ion may associate with multiple NTF(2)(-) anions in the BMINTF(2) solution to form a solvated complex.