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<p>In this study, we developed a novel solid-state electrolyte by integrating polyvinylidene fluoride (PVDF) with sodium beta alumina (NaAl<sub>11</sub>O<sub>17</sub>), varying PVDF content at 5%, 10%, 20%, and 30% wt% to explore ionic conductivity trends. The structural integrity and morphology were assessed using X-ray diffraction and field emission scanning electron microscopy, respectively, validating the formation of the hybrid nanocomposite. Electrochemical impedance spectroscopy indicated a complex relationship between the PVDF concentration and dielectric permittivity, peaking at 20 wt% PVDF. The ionic conductivity followed a similar trend, rising to a maximum at 20 wt% before declining, suggesting an optimal ion mobility at this composition. Analysis of Cole–Cole plots highlighted the role of ionic resistance in shaping the electrical behavior of the system. These results highlight PVDF–NaAl<sub>11</sub>O<sub>17</sub> composites as promising solid-state electrolytes, with optimized ionic conductivity and improved stability for energy storage applications.</p>

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Synthesis and optimization of ionic conductivity in PVDF–sodium β-alumina hybrid nanocomposite system

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • Shahid Ahmad Shah,
  • Rupam Mukherjee,
  • Deepak Basandrai,
  • Owais Amin

摘要

In this study, we developed a novel solid-state electrolyte by integrating polyvinylidene fluoride (PVDF) with sodium beta alumina (NaAl11O17), varying PVDF content at 5%, 10%, 20%, and 30% wt% to explore ionic conductivity trends. The structural integrity and morphology were assessed using X-ray diffraction and field emission scanning electron microscopy, respectively, validating the formation of the hybrid nanocomposite. Electrochemical impedance spectroscopy indicated a complex relationship between the PVDF concentration and dielectric permittivity, peaking at 20 wt% PVDF. The ionic conductivity followed a similar trend, rising to a maximum at 20 wt% before declining, suggesting an optimal ion mobility at this composition. Analysis of Cole–Cole plots highlighted the role of ionic resistance in shaping the electrical behavior of the system. These results highlight PVDF–NaAl11O17 composites as promising solid-state electrolytes, with optimized ionic conductivity and improved stability for energy storage applications.