NEW LITHIUM MIXED METAL SULFIDE WITH HIGH IONIC CONDUCTIVITY

The present invention relates to a compound represented by the general formula LiMZS, wherein 0.3≤x≤0.9; wherein M is one or more elements selected from the group consisting of Pb, Mg, Ca, Ge and Sn; and wherein Z is one or more elements selected from the group consisting of Ge, Si, Sn and Al. The present invention also relates to a method for preparing the material of the present invention, comprising the steps of: In still another aspect, the present invention relates to a use of the compound of the present invention as a solid electrolyte, in particular in an all solid-state lithium battery.