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<p>Polyvinylidene fluoride (PVDF) polymer-based lead-free ceramic nanocomposites have received increased attention because of the high breakdown strength, flexibility, light weight, and environmentally friendly. We have synthesized BaZr<sub>0.4</sub>Ti<sub>0.6</sub>O<sub>3</sub> (BZT) ceramic nanoparticles using the nano mill process and hydroxylated (hy)-BZT–PVDF composite film using the solution casting method with 10&#xa0;wt.% of BZT nanoparticles as a filler and 90&#xa0;wt.% of PVDF polymer as the matrix. An x-ray diffraction (XRD) pattern verifies the successful synthesis of composites. Fourier transform infrared (FTIR) spectra confirm the successful hydroxylation of BZT powder for better dispersion. Differential scanning calorimetry analysis represents an improved degree of crystallinity in cases of composites. The dominance of the polar phase of PVDF in composites was observed due to interfacial interaction among filler nanoparticles. The significantly enhanced dielectric permittivity (<i>ɛ</i><sub>r</sub> ~25) and ferroelectric properties have been obtained in case of the hy-BZT–PVDF composite film in comparison with the pure PVDF film (<i>ɛ</i><sub>r</sub> ~8). The value of dielectric breakdown strength for hy-BZT–PVDF composite has been calculated using Weibull analysis and found to be 1754&#xa0;kV/cm. The above synthesized composites may be a suitable replacement with improved dielectric properties for energy storage applications.</p>

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Significantly Enhanced Dielectric and Energy Storage Properties of Hydroxylated BZT–PVDF Composite Films for Energy Storage Applications

  • 期刊论文

  • 发表日期：

    2025年9月24日

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  • Ankit Dwivedi,
  • Vishwa Pratap Singh,
  • Akhilesh Kumar Singh

摘要

Polyvinylidene fluoride (PVDF) polymer-based lead-free ceramic nanocomposites have received increased attention because of the high breakdown strength, flexibility, light weight, and environmentally friendly. We have synthesized BaZr0.4Ti0.6O3 (BZT) ceramic nanoparticles using the nano mill process and hydroxylated (hy)-BZT–PVDF composite film using the solution casting method with 10 wt.% of BZT nanoparticles as a filler and 90 wt.% of PVDF polymer as the matrix. An x-ray diffraction (XRD) pattern verifies the successful synthesis of composites. Fourier transform infrared (FTIR) spectra confirm the successful hydroxylation of BZT powder for better dispersion. Differential scanning calorimetry analysis represents an improved degree of crystallinity in cases of composites. The dominance of the polar phase of PVDF in composites was observed due to interfacial interaction among filler nanoparticles. The significantly enhanced dielectric permittivity (ɛr ~25) and ferroelectric properties have been obtained in case of the hy-BZT–PVDF composite film in comparison with the pure PVDF film (ɛr ~8). The value of dielectric breakdown strength for hy-BZT–PVDF composite has been calculated using Weibull analysis and found to be 1754 kV/cm. The above synthesized composites may be a suitable replacement with improved dielectric properties for energy storage applications.