Evaluation of battery‐grade alkaline earth metal sulfide electrodes for energy storage applications

Abstract

Summary Alkaline earth and transition metal sulfides have been recognized as promising electrode materials for electrochemical energy storage on account of their reversibility, electroconductivity, and rate capability. In this work, we explore the energy storage profile of a strontium sulfide, SrS, electrode developed via the sonochemical method providing a capacity of 451 C/g. We then sift out its capacitive and diffusive contributions using Dunn's model and extend the analysis by examining the correlation between the regression parameters k1 and k2 of the model in greater detail to bring to light electrochemical features that are obscured by the currently prevailing methods of presenting data for cyclic voltammetry experiments. This method presented here may be generalized to other electrode materials to unveil hidden processes in various electrochemical energy storage systems.