Dielectric Properties of PVA-PVP and Ni-Cd Composites in the Frequency Range 20 Hz to 2 MHz: Insights for Battery Applications
DOI:
https://doi.org/10.58213/vidhyayana.v10isi3.2197Keywords:
Dielectric properties, PVA-PVP composites, Ni-Cd composites, Broadband Dielectric Relaxation Spectroscopy, frequency-dependent behavior, energy storage, ionic conductivity, dipolar polarization, dielectric constant, loss factor, charge transport, polymer composites, battery applicationsAbstract
This study investigates the dielectric properties of Polyvinyl Alcohol (PVA) and Polyvinyl Pyrrolidone (PVP) polymer composites embedded with Nickel-Cadmium (Ni-Cd) particles, aimed at exploring their potential as advanced materials for battery applications. Broadband Dielectric Relaxation Spectroscopy (BDRS) was employed to analyze the frequency-dependent behavior of the composites across the range of 20 Hz to 2 MHz. The results reveal significant frequency-dependent dielectric relaxation phenomena, highlighting the interplay between ionic conductivity and dipolar polarization. The dielectric constant and loss factor were measured, demonstrating pronounced relaxation peaks indicative of charge storage and transport mechanisms. The influence of Ni-Cd particle dispersion within the polymer matrix on the dielectric performance was systematically examined, revealing an enhancement in the energy storage capability and dielectric strength of the composites. Furthermore, the frequency-dependent conductivity showcased a transition from DC to AC behavior, reflecting the influence of charge carrier mobility and interfacial polarization. These findings suggest that the tailored PVA-PVP/Ni-Cd composites exhibit promising dielectric properties, making them suitable for energy storage applications in next-generation battery technologies.
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