Characterization of Li₂S-P-S solid electrolytes prepared by using mechanical milling

Abstract

The Li₂S-P₂S₅ glasses were prepared from the mixture of Li₂S, P and S by using mechanical milling. Electrical properties and local structure of the glasses were investigated. These glasses contained PS₄^3- and P₂S₆^4- units, while the glasses obtained from Li₂S and P₂S₅ contained PS₄^3- unit. The glass-ceramics were prepared by the heat-treatment of these glasses above the crystallization temperature. Raman spectra suggested that the glass-ceramics contained PS₄^3- unit. The conductivity of the glass-ceramics was more than 10^-4 S/cm at room temperature.