Structure and physicochemical properties of glasses in the Li2S-LiPO3 system

The temperature-concentration dependence of the electrical conductivity of glasses in the Li2O-LiPO3 and Li2S-LiPO3 systems is investigated. With the use of the Tubandt method, it is demonstrated that the electric current in glasses of these systems is provided by migration of lithium ions. The concentration dependence of the electrical conductivity is interpreted using the obtained data on the IR absorption spectra, density, microhardness, ultrasonic velocity, etc. It is found that the electrical conductivity of glasses in the Li2S-LipO(3) system is more than 10(3) times higher than that in pure LiPO3. The observed increase in the electrical conductivity is explained by the formation of sulfur-containing polar structural-chermcal groupings of type, whose dissociation energy is lower than that of similar oxide polar structural fragments. the Li+[S-PO3/2] This results in an increase in the number of lithium ions involved in the electricity transport due to an increase in the degree of dissociation of polar structural-chemical units.