Studies on the ions transportation behavior of alginate doped with H+ carrier-based polymer electrolytes

In the present work, amorphous bio-based polymer electrolytes (BBPEs) using alginate as a matrix host and doped with varying amounts of ammonium iodide (NH4I) have been developed via solution casting technique. The physicochemical properties alginate-NH4I BBPEs were evaluated by X-Ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared (FTIR), thermal gravimetric analysis (TGA), electrical impedance spectroscopy (EIS), transference number measurement (TNM). film containing 25 wt % NH4I possessed highest ionic conductivity 1.29 × 10−4 S cm−1, phase, good stability up to 234 °C. Based on Nyquist fitting approaches, was primarily influenced ion transportation, which due interplay segmental motion between NH4I, also H+ hopping mechanism, shown FTIR. proton (tH+ = 0.41) suggests that are promising materials in electrochemical device applications.