Electrochemical properties of the amorphous solid electrolytes in the system Li2S-Al2S3-P2S5

► (100-x)Li3PS4·xLiAlS2 samples were prepared by a high-energy ball-milling. ► The conductivity was increased with increasing the LiAlS2 content. ► The maximum conductivity of the sample was 6.0 × 10− 4S cm− 1 at 298 K. ► All-solid state batteries were fabricated with the 86.9Li3PS4·13.1LiAlS2 sample. ► The battery with TiS2 showed discharge capacity of 185 mA h g− 1 at room temperature.