A New Class of High-Conductivity Solid Electrolytes: Tetraalkylammonium lodide-Silver lodide Double Salts

Abstract

Double salts, formed by the combination of silver iodide with tetraalkylammonium iodide salts, have been found to exhibit very high ionic mobilities in the solid state over the temperature range from 100° down to −50°C. In the system AgI‐diethyldimethylammonium iodide, the composition dependence of the ionic conductivity at 22°C passes through a maximum value of 0.06 (ohm‐cm)−1 at a composition of 87 m/o (mole per cent) AgI. Results are presented for a number of related salts in the silver tetraalkylammonium iodide class.