Fabrication of a high lithium ion conducting lithium borosilicate glass

A lithium ion conducting glass, Li2O–B2O3–SiO2, is fabricated by the conventional melt and quenching technique from a mixture of Li2CO3, B2O3 and SiO2 powders. It appears that B2O3 decreases the crystallization tendency of the Li2O–SiO2 binary glass, resulting in an expanded glass forming region in the Li2O–B2O3–SiO2 ternary glass. The maximum conductivity is 2 × 10− 6 S cm− 1 at 25 °C for the 50Li2O–38B2O3–12SiO2 glass sample. The observed high conductivity is due to the mixed former effect. The conductivity strongly depends on the Li2O content, but not on K (SiO2/B2O3) in the Li2O–B2O3–SiO2 ternary glass.