POLYMERIC COMPOSITES BASED ON VANADIUM-OXIDES AS CATHODES FOR RECHARGEABLE LITHIUM BATTERIES .1. MICROSTRUCTURAL AND ELECTRICAL CHARACTERIZATION

A new vanadium oxide has been obtained from a V2O5 thermochemical trea tment. This material was incorporated into polymeric systems formed by mixtures of poly (ethylene oxide) (PEO), a polyphosphazene (PPz) and carbon black (CB) with the aim of analyzing the possibilities, from an electrical view point, of using this new oxide as a cathode constitue nt in rechargeable lithium batteries. In this paper the effect produce d by this new vanadium oxide in the crystalline microstructure of PEO and its mixtures with PPz was studied and compared with the effect pro duced by the original V2O5 by means of the analysis of crystallization kinetics under non-isothermal conditions of the different samples. In addition, the samples have been electrically characterised by impedan ce analysis, all samples having good conductivity properties.