Transport property and structural characterization studies on (1 −x)[0.75AgI:0.25AgCl]:xTiO2 conducting composite electrolyte system

Abstract Transport property and structural investigation have been carried out on newly synthesized Ag+ ion conducting composite electrolyte system. The composite electrolyte system (1 − x)[0.75AgI:0.25AgCl]:xTiO2, where 0 ⩽ x ⩽ 0.5 (in molar weight fraction) has been synthesized by melt quenching and annealing methods. The chemical compound TiO2 (second phase dispersoid) dispersed in different compositions in a quenched (0.75AgI:0.25AgCl) mixed system/solid solution; this solid solution was used as a first phase host salt in place of AgI. The different preparation routes were adopted for the composite electrolyte system. Composition x = 0.1 exhibited highest conductivity at room temperature. The composite system 0.9[0.75AgI:0.25AgCl]:0.1TiO2 was synthesized at different soaking times by melt quenching method. The system exhibited optimum conductivity at 20 min soaking time (σrt ≈ 1.4 × 10−3 S/cm). The ac conductivity has been measured from Z′–Z″ (Cole–Cole) complex impedance plots using impedance spectroscopic (IS) technique. The electrical conductivity as a function of temperature and frequency has been studied, and activation energy Ea, was calculated from Arrhenius plots for all compositions (0 ⩽ x ⩽ 0.5). The dc conductivity value has been evaluated from Log σ vs. log f plots. Structural characterization studies were carried out by X-ray diffraction (XRD) and differential thermal analysis (DSC) techniques.