Anode material for all-solid-state battery based on solid electrolyte CsAg4Br2.5I2.5: Theory and experiment

Abstract

In this work the optimum composition of anode material for all-solid-state batteries based on silver and solid electrolyte CsAg4I2.5Br2.5 was determined. For this, electronic conductivity of the mixture of the solid electrolyte and carbon black was studied. The percolation behavior of systems was studied. Percolation thresholds were determined for each system theoretically and experimentally. It was shown that the electrochemically accessible silver surface in the anode material has non–monotonic dependence on the silver content. As a consequence, the exchange current in the cell also has a maximum.