PREPARATION OF TRIPHYLITE-LIKE GLASSES AND NANOMATERIALS IN THE LiFePO4-V2O5 SYSTEM AND STUDY ON THEIR ELECTRICAL CONDUCTIVITY

Abstract

Research on lithium iron phosphates is stimulated by their application as cathodes in Li -ion rechargeable batteries. The aim of this study was to enhance its initially poor electronic conductivity. A thermal nanocrystallization is applied to lithium-iron-phosphate and lithium-vanadium-iron-phosphates materials resulting in a significant increase of the electronic conductivity of the latter (almost 10-6 S/cm). The obtained nanomaterial exhibits very good thermal stability (up to 625°C), the activation energy 0.51 eV and moderate electronic conductivity at the room temperature, which is, however, a good starting point for further enhancement.