As the ions are the majority charge carrier, this polymer electrolyte could be considered as a promising candidate to be used in electrochemical energy storage devices for example electrochemical double-layer capacitor (EDLC) device. Finally, the sample with maximum conductivity, ion dominance of t ion and relatively wide breakdown voltage were found to be 0.88 and 1.6 V, respectively. The linear sweep voltammetry (LSV) shows a relatively electrochemically stable electrolyte where the voltage was swept linearly up to 1.6 V. For further confirmation, the transference number measurement (TNM) of the PVA-MC-NH 4I electrolyte was analyzed in which ions were primarily entities for the charge transfer process. The peak appearance of the dielectric relaxation analysis verified the non-Debye type of relaxation mechanism was clarified via the peak appearance of the dielectric relaxation. The dielectric constant, ε’ and loss, ε’’ values were recorded at high values within the low-frequency region. The conductivity behaviors were further emphasized from the dielectric study. The sample containing 40 wt.% of NH 4I salt exhibited maximum ionic conductivity (7.01 × 10 −8) S cm −1 at room temperature. The application of EEC modeling on experimental data of EIS was helpful to calculate the ion transport parameters and detect the circuit elements of the films. Electrical impedance spectroscopy (EIS) showed that the whole conductivity of complexes of PVA-MC was increased beyond the addition of NH 4I. The interaction among the components of the electrolyte was confirmed via the FTIR approach.
The structural and electrical properties of the polymer blend electrolyte were performed via the acquisition of Fourier Transform Infrared (FTIR) and electrical impedance spectroscopy (EIS), respectively.
This work presents the fabrication of polymer electrolyte membranes (PEMs) that are made of polyvinyl alcohol-methylcellulose (PVA-MC) doped with various amounts of ammonium iodide (NH 4I).
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