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Revista mexicana de física
versión impresa ISSN 0035-001X
Resumen
NAGAMEDIANOVA, Z y SANCHEZ, E.M. Estudio de la conductividad del sistema amorfo Li2S-Sb2S3-P2S5. Rev. mex. fis. [online]. 2007, vol.53, n.4, pp.228-234. ISSN 0035-001X.
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 Li2S-Sb2S3-P2S5 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, Ea, pre-exponential factors, gσ0, and circuit equivalent model R(RQ)(RQ) were reported. The results are comparable to those ones of other lithium glasses based on P2S5, SiS2, GeS2, As2S3 etc. Despite ionic conductivities are insufficient for application on common batteries, those new glasses based on Li2S-Sb2S3 and prepared as thin films could be used on solid state microbatteries of lithium.
Palabras llave : Lithium batteries; solid ionic conductors; sulfide glasses; impedance spectroscopy.