Diffusion dynamics of mobile ions in superionic conductors: commonality between superionic and conventional ionic conductors

Abstract

The superionic phase can be different from the usual phase when we characterize the dynamic and collective effects in condensed matter. One of the lithium superionic conductors, Li10GeP2S12, exhibits the highest ionic conductivity (similar to 10(-2) S cm(-1) at room temperature). Dynamic properties of ac transport (electrochemical impedance spectroscopy) in Li10GeP2S12 exhibits the common features found in ordinal ionic transport materials, which are discussed in terms of the anomalous diffusion (non-Brownian) of mobile ions. These characteristics are somewhat similar but not the same as those found for a liquid electrolytes.