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<p>In this work, silver–copper oxide (Ag–CuO) nanoparticles were incorporated into polyethylene oxide/carboxymethyl cellulose (PEO/CMC) blend to tailor its structural, dielectric, and electrical properties. A constant content of Ag nanoparticles of 0.3% wt. was combined with different CuO nanoparticles concentrations of 0.5 and 1.0 wt% via the solution casting technique. XRD analysis revealed a significant decrease in crystallization inhibition and an increase in amorphous content upon hybrid nanofillers incorporation. FTIR results confirmed strong interfacial interactions between the Ag–CuO nanoparticles and polymers’ functional groups, while transmission electron microscopy verified nanoscale dispersion within the matrix. Electrical and dielectric measurements demonstrated a clear enhancement in the ionic conductivity and dielectric permittivity with increasing nanofiller loading. Electrochemical impedance spectroscopy (EIS) further confirmed a pronounced reduction in bulk resistance for the optimized nanocomposite film, indicating improved charge transport.&#xa0;The observed improvements arise from the synergistic interaction between metallic silver and semiconducting copper oxide nanoparticles, which enhances interfacial polarization and facilitates charge transport within the bio-polymer matrix. These results suggest that the developed PEO/CMC/Ag–CuO nanocomposites are promising candidates for dielectric materials and energy storage–related applications, such as capacitors and polymer-based electronic devices.</p> Graphical Abstract <p></p>

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Synergistic Enhancement of Ionic Conductivity and Dielectric Performance in PEO/CMC Polymer Electrolytes via Ag–CuO Hybrid Nanofillers for Advanced Energy Storage Applications

  • 期刊论文

  • 发表日期：

    2026年5月20日

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  • Ohood Albeydani,
  • Salah E. El-Zohary,
  • M. A. Morsi,
  • G. M. Asnag,
  • Sadiq H. Khoreem,
  • Doaa Abdelhameed,
  • A. E. Tarabiah,
  • E. M. Abdallah

摘要

In this work, silver–copper oxide (Ag–CuO) nanoparticles were incorporated into polyethylene oxide/carboxymethyl cellulose (PEO/CMC) blend to tailor its structural, dielectric, and electrical properties. A constant content of Ag nanoparticles of 0.3% wt. was combined with different CuO nanoparticles concentrations of 0.5 and 1.0 wt% via the solution casting technique. XRD analysis revealed a significant decrease in crystallization inhibition and an increase in amorphous content upon hybrid nanofillers incorporation. FTIR results confirmed strong interfacial interactions between the Ag–CuO nanoparticles and polymers’ functional groups, while transmission electron microscopy verified nanoscale dispersion within the matrix. Electrical and dielectric measurements demonstrated a clear enhancement in the ionic conductivity and dielectric permittivity with increasing nanofiller loading. Electrochemical impedance spectroscopy (EIS) further confirmed a pronounced reduction in bulk resistance for the optimized nanocomposite film, indicating improved charge transport. The observed improvements arise from the synergistic interaction between metallic silver and semiconducting copper oxide nanoparticles, which enhances interfacial polarization and facilitates charge transport within the bio-polymer matrix. These results suggest that the developed PEO/CMC/Ag–CuO nanocomposites are promising candidates for dielectric materials and energy storage–related applications, such as capacitors and polymer-based electronic devices.

Graphical Abstract