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<p>The increasing demand for sustainable energy storage systems to integrate renewable energy has increased the need for electrode materials that are inexpensive, non-toxic, and environmentally friendly. Despite the emergence of supercapacitors as potential energy storage technologies, their low energy density hinders their practical application. In addition, the use of conducting polymer-based electrode materials offers a relatively low-cost and environmentally friendly approach for sustainable electrochemical energy storage applications. To address the existing challenges, this work focuses on poly-p-anisidine (PPA), a good electron-donating methoxy group, and it is mixed with copper nanoparticles (Cu-Np). The novelty of the present work lies in the development of a PPA/Cu nanocomposite and the comprehensive correlation of its structural, Hall-effect, dielectric and electrochemical properties for supercapacitor applications, which has been scarcely explored compared with conventional PANI-based Cu composite. The chemical oxidative polymerization method is used to synthesize PPA and PPA/Cu nanocomposites, offering cost-effectiveness. XRD, FT-IR, UV-Vis, TGA, SEM, TEM and the four-probe method confirm the incorporation of Cu into the PPA matrix. Electrochemical performance was analysed using galvanostatic charge–discharge, cyclic voltammetry and electrochemical impedance spectroscopy. The PPA/Cu nanocomposite exhibited improved specific capacitance and charge storage behaviour compared to pristine PPA. The specific capacitance of the PPA/Cu nanocomposite, as determined by the GCD value at 1&#xa0;A g<sup>− 1</sup>, is 508&#xa0;F g<sup>− 1</sup>. The energy density and power density of PPA/Cu at 1&#xa0;A g<sup>− 1</sup> are 11.3 Wh kg<sup>− 1</sup> and 232&#xa0;W kg<sup>− 1</sup>, respectively. Furthermore, as a preliminary demonstration, a symmetric coin cell device was fabricated using the optimized PPA/Cu electrode. The fabricated coin-cell PPA/Cu electrode exhibited a maximum specific capacitance of 37.3&#xa0;F g<sup>− 1</sup> at 0.05&#xa0;A g<sup>− 1</sup>.</p> Graphical Abstract <p></p>

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Structural and electrochemical behaviour of poly-p-anisidine/Cu nanocomposites for energy storage applications

  • 期刊论文

  • 发表日期：

    2026年7月4日

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  • Varsha A,
  • Velraj G

摘要

The increasing demand for sustainable energy storage systems to integrate renewable energy has increased the need for electrode materials that are inexpensive, non-toxic, and environmentally friendly. Despite the emergence of supercapacitors as potential energy storage technologies, their low energy density hinders their practical application. In addition, the use of conducting polymer-based electrode materials offers a relatively low-cost and environmentally friendly approach for sustainable electrochemical energy storage applications. To address the existing challenges, this work focuses on poly-p-anisidine (PPA), a good electron-donating methoxy group, and it is mixed with copper nanoparticles (Cu-Np). The novelty of the present work lies in the development of a PPA/Cu nanocomposite and the comprehensive correlation of its structural, Hall-effect, dielectric and electrochemical properties for supercapacitor applications, which has been scarcely explored compared with conventional PANI-based Cu composite. The chemical oxidative polymerization method is used to synthesize PPA and PPA/Cu nanocomposites, offering cost-effectiveness. XRD, FT-IR, UV-Vis, TGA, SEM, TEM and the four-probe method confirm the incorporation of Cu into the PPA matrix. Electrochemical performance was analysed using galvanostatic charge–discharge, cyclic voltammetry and electrochemical impedance spectroscopy. The PPA/Cu nanocomposite exhibited improved specific capacitance and charge storage behaviour compared to pristine PPA. The specific capacitance of the PPA/Cu nanocomposite, as determined by the GCD value at 1 A g− 1, is 508 F g− 1. The energy density and power density of PPA/Cu at 1 A g− 1 are 11.3 Wh kg− 1 and 232 W kg− 1, respectively. Furthermore, as a preliminary demonstration, a symmetric coin cell device was fabricated using the optimized PPA/Cu electrode. The fabricated coin-cell PPA/Cu electrode exhibited a maximum specific capacitance of 37.3 F g− 1 at 0.05 A g− 1.

Graphical Abstract