Ambient and subambient temperature proton-conducting polymer gel electrolytes

Nonaqueous proton-conducting polymer gels have been synthesized and characterized by impedance spectroscopy and cyclic voltammetry. Special emphasis has been put to the subambient temperature characteristics of the samples studied with respect to their possible application in electrochromic devices. The gels studied exhibit ambient temperature conductivities exceeding 10−3 S/cm, which remains higher than 10−4 S/cm even at −50 °C. The electrochemical stability of the studied protonic gels depends mainly on the type of solvent used and is the highest for samples plasticized with propylene carbonate.