Electrochemical behaviors of Li+ ion conductor, Li3PO4-Li2S-SiS2

There are gret interests on sulfide glasses because of their high lithium ion conductivity. We synthesized a new lithium ion conductive solid electrolyte, Li3PO4-Li2S-SiS2 to obtain a solid temperature was 7.6 × 10−4 S/cm, and proved to be stable against electrochemical reduction. We also investigated the electrochemical behaviors of spherical graphite with this electrolyte as a preliminary study for solid-state batteries and proved that spherical graphite seems a good candidate for negative electrode material in the solid-state batteries.