Synthesis, characterization and electrical properties of CdI2 doped Al2O3 and TiO2 superionic conductors

► Al2O3 and TiO2 doped CdI2 composites have been prepared at different composition. ► The prepared composites were characterized by XRD, DSC and SEM. ► The electrical conductivity shows two- to three fold increment as compared to pure CdI2 in the composition range x = 0.3-0.5 mol fraction of the dopants. ► The main reason behind this is the role played by the interface region which itself is a disordered region where defect formation and migration enthalpies are notably reduced.