On the Connections of Thermal and Ionic Transport in Solid Ionic Conductors

<br/>The advent of solid-state batteries has spawned a recent increase in interest in lithium and sodium conducting solid electrolytes, especially in the lithium thiophosphates. However, many open questions remain when trying to optimize electrolytes and understand solid state battery chemistries, especially pertaining to the fundamentals of ionic transport.<br/><br/>In this presentation, we will show that single series of substitutions are not sufficient to understand ionic transport bottlenecks and that there is a tremendous influence of lattice dynamics on ionic conductors. By introducing a different approach to understanding ionic motion using phonon occupations, we try to explain so far unexplained behaviors of physical ionic transport and by extending this work we will try to compare ionic and thermal transport properties of solid electrolytes.