Li10GeP2S12 solid electrolytes synthesised via liquid-phase methods

Abstract

Li₁₀GeP₂S₁₂ solid electrolytes for all-solid-state batteries were synthesised through liquid-phase shaking, which is a suspension synthesis method, in 1 d. Additionally, Li₁₀GeP₂S₁₂ solid electrolytes were prepared in 7.5 h, which is the fastest synthesis time, through solution synthesis using excess sulfur and a mixed solvent of acetonitrile, tetrahydrofuran, and ethanol. These Li₁₀GeP₂S₁₂ solid electrolytes exhibited an ionic conductivity of 1.6 × 10⁻³ S cm⁻¹, which is the highest ionic conductivity of previous studies of liquid phase synthesis. Therefore, Li₁₀GeP₂S₁₂ solid electrolytes with high ionic conductivity can be rapidly synthesised via liquid-phase methods.