INVESTIGATING THE ELECTRICAL PROPERTIES AND POTENTIALS OF MAGNESIUM-ION ELECTROLYTE IN BINARY SOLVENTS OF PROPYLENE CARBONATE AND ACETONITRILE

Abstract

This study work provides information on the interaction of mixed solvents of propylene carbonate (PC) and acetonitrile (AN) for magnesium batteries. Varying mole fractions of mixed solvents with the salt were prepared and characterized. Density, viscosity, conductivity, dielectric constant, Critical distance for ion pair formation, and Grunberg Nisan’s d parameter were measured at different compositions of PC, molar concentration of Mg(ClO4)2 (0.1, 0.5, 1.0 and 2.0 M) and temperatures (25, 30, 40 and 50 °C) were monitor at different interval. It was observed that density values decreased with a decrease in the mole fraction of PC and an increase in temperature, Viscosity values decreased with an increase in the mole fraction of AN and an increase in temperature, Molar conductivity values increased with increasing concentration of the solution, and the highest value was recorded at 0.5-mole fraction of PC in 2.0 M solution, The dielectric constant of the mixture shows changes in values as the mole fractions of the mixtures changed. Critical distance for ion pair formation was obtained at mole fractions 0.3 and 0.65 of PC. These properties were affected by ion-solvent and solvent-solvent interactions in the mixtures. The varying temperatures studied demonstrated that the battery remains stable even at high temperatures as the mixing ratio of the organic solvents for optimal magnesium ion battery performance is established at 0.5-mole fractions of PC with a molar conductance of 20.164 Scm2 mol-1. The results have been interpreted based on the intermolecular interactions among the component molecules of the systems.