Study of the composition dependence of the ionic conductivity of LiH_{x}D_{1-x} alloys

TL;DR

This study investigates how the ionic conductivity of LiH_xD_{1-x} alloys varies with composition, finding no maximum conductivity within the entire range, which is relevant for hydrogen storage applications.

Contribution

It provides the first detailed analysis of the composition dependence of ionic conductivity in LiH-D alloys, showing the absence of a conductivity maximum.

Findings

No maximum in conductivity across all compositions.

Conductivity varies smoothly with composition.

Implications for hydrogen storage materials.

Abstract

Recent observations have shown that at a certain composition of solid solutions AgCl$_x$Br$_{1-x}$, AgCl-CdCl$_2$, AgBr-CdBr$_2$, of ionic crystals, the electrical conductivity exhibits a value appreciably larger than that of the end constituents. Here, we investigate the electrical conductivity $\sigma$ of LiH$_x$D$_{1-x}$ solid solutions -which are of prominent importance in fuel hydrogen storage applications- and find that in the whole composition range no maximum is likely to occur in the $\sigma$ versus x dependence.