Electrical conductivity, electrical modulus, and scaling studies of Li2O–Ga2O3–P2O5 glass electrolyte doped with selenium ions

Abstract

A serious of glass samples according to the formula (100 − x) (0.5 Li2O − 0.2Ga2O3 − 0.3P2O5) + x SeO2 (x = 0, 2, 4, 6, 8, 10 and 12 mol%), labeled as LGPSx (x is the mole percent of SeO2) were synthesized through melt quenching technique. Glass transition temperature Tg and Hurby’s parameter for the prepared LGPS samples were characterized by DSC Traces. FTIR and Raman spectra indicated that SeO2 acts as either glass modifier (SeO32−) or glass former (SeO42−) as the composition of SeO2 changes. The best bulk conductivity, the highest conductivity is achieved by the LGPS10 sample (σ = 1.605 × 10−6 S/cm, at 303 K). The variation of conductivity with frequency of glass samples was explained in the light of different oxidation states of selenium ions. The super curve in the scaling analysis suggesting the temperature independent relaxation phenomenon.