WATER-SOLUBLE GERMANIUM COMPLEXES FOR THE SYNTHESIS OF Li1.5Al0.5Ge1.5(PO4)3 SOLID ELECTROLYTE

Water-soluble citrate and oxalate complexes of germanium (IV) were obtained. Thermal decomposition of citrate and oxalate precursors of a solid electrolyte of Li1.5Al0.5Ge1.5(PO4)3 (LAGP) composition with NASICON structure has been studied using DSC/TG, XRD and IR-spectroscopy. The use of the LAGP oxalate precursor ensures the formation of a monophase product at 650°C with ionic conductivity at 4,2∙10-4 S/cm at room temperature