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<p>The current work aims to study the effect of (1−x)ZnWO<sub>4</sub>-xPbS nanocomposite fillers and temperature on the energy storage performance of polyvinyl alcohol (PVA)/carboxymethyl cellulose (CMC). The degree of crystallinity in PVA/CMC/(1−x)ZnWO<sub>4</sub>-xPbS nanocomposite varies as 16.9 12.4 11.2 12.7 16.9% for pure, <i>x</i> = 0.0, 0.0, 0.1, 0.15, respectively. The incorporation of (1−x)ZnWO<sub>4</sub>/xPbS nanocomposites influences the temperature dependence of the dielectric constant values. Increasing the temperature for all blends improves the energy density (<i>U</i>) values. The <i>U</i> value increased from (5.03, 4.39, 4.67, 2.95, 4.16) to (13.86, 13.62, 16.28, 10.4, 11.91) × 10<sup>–3</sup> J/m<sup>3</sup> as the temperature increased from 293 to 353 K at 1 kHz for undoped and doped PVA/CMC/(1−x)ZnWO<sub>4</sub>/xPbS (x = 0.0, 0.0, 0.1, 0.15) blended polymers, respectively. Our system adheres to the overlapping large polaron tunneling (OLPT) conduction mechanism. The impact of the fillers and the temperature on the Nyquist diagram was explored. The current varied with temperature changes, influenced by both the temperature and the content of the blended polymer. All samples demonstrate the non-ohmic nature of the current–voltage (<i>I-V</i>) characteristics, except blends with <i>x</i> = 0 and 0.05 at specific temperatures. The Poole–Frenkel emission mechanism is most likely present in the system.</p>

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Temperature-dependent dielectric and charge transport properties in PVA/CMC/ZnWO4-PbS polymer composites

  • 期刊论文

  • 发表日期：

    2025年11月6日

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  • Ahmad A. Alsaleh,
  • A. M. Kamal,
  • A. M. El-naggar

摘要

The current work aims to study the effect of (1−x)ZnWO4-xPbS nanocomposite fillers and temperature on the energy storage performance of polyvinyl alcohol (PVA)/carboxymethyl cellulose (CMC). The degree of crystallinity in PVA/CMC/(1−x)ZnWO4-xPbS nanocomposite varies as 16.9 12.4 11.2 12.7 16.9% for pure, x = 0.0, 0.0, 0.1, 0.15, respectively. The incorporation of (1−x)ZnWO4/xPbS nanocomposites influences the temperature dependence of the dielectric constant values. Increasing the temperature for all blends improves the energy density (U) values. The U value increased from (5.03, 4.39, 4.67, 2.95, 4.16) to (13.86, 13.62, 16.28, 10.4, 11.91) × 10–3 J/m3 as the temperature increased from 293 to 353 K at 1 kHz for undoped and doped PVA/CMC/(1−x)ZnWO4/xPbS (x = 0.0, 0.0, 0.1, 0.15) blended polymers, respectively. Our system adheres to the overlapping large polaron tunneling (OLPT) conduction mechanism. The impact of the fillers and the temperature on the Nyquist diagram was explored. The current varied with temperature changes, influenced by both the temperature and the content of the blended polymer. All samples demonstrate the non-ohmic nature of the current–voltage (I-V) characteristics, except blends with x = 0 and 0.05 at specific temperatures. The Poole–Frenkel emission mechanism is most likely present in the system.