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  Scopus ID: 21100926589

Influence of Silica Nanoparticles on Structural, Electrical, and Dielectric Properties of PEO/PVdF/NaNO3/EC Based Composite Solid Polymer Electrolytes

Malla Reddy Yalla, Venakata Ramana Jeedi, S. Shashi Devi, Kiran Kumar Ganta, S. Narender Reddy and A. Sadananda Chary

Abstract

Solid polymer electrolytes (SPEs) have attracted greater attention for various technological applications such as fuel cells, sensors, photochemical solar cells, super-capacitors, and electrochromic display devices. The main advantages of SPEs are good electrochemical stability, safety, flexibility, and durability. However, SPEs have limitations due to their poor conductivity at ambient temperature. In this context, many researchers have explored various methods to enhance the ionic conductivity by taking blended SPEs, plasticized-SPEs, nanocomposite-SPEs and plasticized-nanocomposite SPEs during the last few decades. In this study, composite solid polymer electrolyte systems (CSPEs) were developed by combining polyethylene oxide (PEO) and polyvinylidene fluoride (PVdF) is host polymer matrix. The solution casting method was used to prepare CSPEs using sodium nitrate (NaNO3) salt as an ion dopant, ethylene carbonate (EC) as a plasticizer and silicon dioxide (SiO2) as a nanofiller. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) were used to characterize the CSPEs. Impedance spectroscopy was used to investigate the electrical, dielectric, and electric modulus properties of the CSPEs between temperatures of 298 K and 343 K. The maximum ionic conductivity measured using impedance study was found to be 8 wt.% SiO2 nanofiller. It was attributed to the addition of SiO2 increasing the amorphous nature and conducting paths. The ionic transport number was calculated using Wagner’s polarization method.

Published on: December 13, 2023
doi: 10.17756/nwj.2023-s4-096
Citation: Yalla MR, Jeedi VR, Devi SS, Ganta KK, Reddy SN, et al. 2023. Influence of Silica Nanoparticles on Structural, Electrical, and Dielectric Properties of PEO/PVdF/NaNO3/EC Based Composite Solid Polymer Electrolytes. NanoWorld J 9(S4): S562-S569.

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