Front Cover: Influence of Atmospheric Gas Species on an Argyrodite-Type Sulfide Solid Electrolyte During Moisture Exposure (ChemPhysChem 4/2025)

Abstract

The Front Cover illustrates the effects of various atmospheric gas species on an argyrodite-type sulfide solid electrolyte, Li₆PS₅Cl during moisture exposure, examined by using multiple analytical methods. The electrolyte powder was exposed to different gases: Ar, Ar+CO₂, O₂, and O₂+CO₂, all under a dew point of −20 °C. The generation of H₂S gas was unaffected by the atmospheric gases; however, the conductivity retention of the electrolyte significantly differed. CO₂ exposure promoted the formation of carbonates, whereas O₂ exposure facilitated the formation of phosphates and sulfonates. These reactions led to surface degradation and a consequent reduction in conductivity. More information can be found in the Research Article by Y. Morino, H. Sano and co-workers (DOI: 10.1002/cphc.202400872).