Physicochemical Properties of Lithium Perchlorate Solutions in Sulfolane–Alkyl Acetate Mixtures

Abstract

The physicochemical properties of 1.0 M lithium perchlorate solutions in mixtures of sulfolane with methyl, ethyl, and butyl acetates are studied; it is found that the introduction of alkyl acetates leads to a decrease in the viscosity of the electrolyte solutions and an expansion of the temperature range of the liquid-phase state. The specific ionic conductivity isotherms (30°C) of 1.0 M lithium perchlorate solutions in sulfolane–alkyl acetate mixtures exhibit maxima, the position of which is determined by the molecular weight of the alkyl acetate. The electrochemical stability window of 1.0 M LiClO₄ solutions in sulfolane–alkyl acetate mixtures is 5.7–5.8 V vs. Li/Li⁺.