Solid electrolytes with high ionic conductivities are much sought after for the development of solid-state batteries, electrochromic devices and sensors. From a practical point of view, the electrolytes with room temperature conductivities in the neighborhood of 10 S/cm are required for the efficient operation of solid-state batteries at room temperature. Solid electrolytes with high ionic conductivities are much sought after for the development of solid-state batteries, electrochromic devices and sensors. From a practical point of view, the electrolytes with room temperature conductivities in the neighborhood of 10 S / cm are required for the efficient operation of solid-state batteries at room temperature.