Electrical properties of fast ion conducting silver based borate glasses: Application in solid battery

• AgI dopant created more opened borate network structure.
• Dielectric constant and loss values increased with AgI concentration.
• AgI dopant enhanced both ion migration and orientation.
• 0.6 AgI–0.27 Ag2O–0.13 B2O3 showed the highest DC-conductivity at room temperature.
• It showed also good life time as a solid electrolyte in solid battery at room temperature.

The electrical properties of the ternary ionic conducting glass system xAgI–(1 – x)[0.67Ag2O–0.33B2O3], where x = 0.4 , 0.5, 0.6, 0.7 and 0.8, were studied for emphasizing the influence of silver iodide concentration on the transport properties in the based borate glasses. The glasses were prepared by melt quenching technique and characterized using X-ray diffraction (XRD), FT-IR spectra and differential thermal analysis (DTA). XRD confirmed a glassy nature for all investigated compositions. Electrical conductivity (σ), dielectric constant (ɛ  ′), dielectric loss (ε″ε″) and impedance spectra (Z′–Z′′) were studied for all samples at a frequency range of 0–106 Hz and over a temperature range of 303–413 K. Changes of conductivity and dielectric properties with composition, temperature and frequency were analyzed and discussed. A silver iodine battery using glassy electrolyte sample with the highest ionic conductivity (x = 0.6) was studied.

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