Characterizations of a new lithium ion conducting Li2O–SeO2–B2O3 glass electrolyte

A new lithium-ion conducting glass electrolyte, xLi2O–(1−x)(ySeO2–(1−y)B2O3) was prepared by melt quenching technique and characterized using various analytical techniques. 0.5Li2O–0.5(ySeO2–(1−y)B2O3) glass shows typical mixed-former behavior and the conductivity increased significantly compared with binary Li2O–B2O3 glass with a maximum conductivity close to 10−6 S/cm at y=0.5. Based on FT-IR and DSC analyses, SeO2 acts either glass modifier or glass former as the composition of SeO2 changes. The glass transition temperature is found to be about 300 °C, and the glass is electrochemically stable without any significant decomposition reaction between 0 and 5 V (vs. Li/Li+).