Preparation of Li3PS4 solid electrolyte using ethyl acetate as synthetic medium

A precursor for Li3PS4 solid electrolyte was successfully prepared by reaction of Li2S and P2S5 in ethyl acetate. The precursor was composed of Li3PS4 and ethyl acetate in a molar ratio of 1:2, as determined by thermogravimetry-differential thermal analysis (TG-DTA). Upon drying at 160 °C, the precursor decomposed to form crystalline Li3PS4 with a high ionic conductivity of 3.3 × 10− 4 S cm− 1 and low activation energy of about 31 kJ mol− 1.