Estudio de la conductividad del sistema amorfo Li$_{2}$S-Sb$_{2}$S$_{3}$-P$_{2}$S$_{5}$

Abstract

There is a great interest in sulfide glasses because of their high lithium ion conductivity. This work presents the study of new glasses based on Li$_{2}$S-Sb$_{2}$S$_{3}$-P$_{2}$S$_{5}$ system which are ionic lithium conductors with possible application in solid state batteries of lithium. The synthesis of glasses has been performed by classical quenching technique and glassy nature was confirmed by various techniques as X-Ray Diffraction (XRD), Microscopy and Differential Scanning Calorimetry (DSC). Conductivities have been determined by Impedance Spectroscopy (IS). Some compositions of high lithium content have presented ionic conductivities close to 10$^{ - 6}$ S/cm at room temperature that permits to consider them as solid lithium conductors. In addition, the values of activation energy, E$_{a}$, pre-exponential factors,${\rm g}\sigma _{0}$, and circuit equivalent model R(RQ)(RQ) were reported. The results are comparable to those ones of other lithium glasses based on P$_{2}$S$_{5}$, SiS$_{2}$, GeS$_{2}$, As$_{2}$S$_{3}$ etc. Despite ionic conductivities are insufficient for application on common batteries, those new glasses based on Li$_{2}$S-Sb$_{2}$S$_{3}$ and prepared as thin films could be used on solid state microbatteries of lithium.