Synthesis and Electrochemical Properties of Hydrosulfide Solid Electrolytes

Intensive research on solid electrolytes, a crucial component of all-solid-state batteries (ASSB), serves as a solution to address the safety concerns and limited energy density of conventional lithium-ion batteries. Recent studies have extensively explored solid electrolytes that include various anions, due to their key role in determining the structure and properties of the electrolytes through their interactions with other ions. Here, we report the synthesis and electrochemical properties of hydrosulfide solid electrolyte, Li₅PS₄(BH₄)₂, with a lithium superionic conductivity and an excellent deformability.