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<p>In this research, cadmium oxide (CdO) nanoparticles were prepared through an innovative sol-gel auto-combustion technique. For the preparation of rGO nanoparticles, we employed a simple Hummer’s method. The crystallite sizes of CdO and rGO were determined to be 27.79&#xa0;nm and 2.23&#xa0;nm, respectively. We then developed CdO-rGO composite by modifying rGO concentrations to 5% and 10%, which were evaluated as positive electrodes demonstrating exceptional energy storage capabilities. The synthesis of these nanocomposites followed a controlled weight% method. Notably, the composite containing 10% rGO exhibited an outstanding specific electrochemical capacitance value of 1527.14&#xa0;F/gm and energy density of 240 Wh/Kg, tested in a KOH solution 3&#xa0;M electrolyte, across a potential window of 0.0 to 0.6&#xa0;V. This enhancement in effectiveness is linked to the presence of conductive rGO, which boosts rapid charge transfer kinetics. Furthermore, our results indicated that the specific electrochemical capacitance of the fabricated electrodes boosted with the rising amount of rGO in the structure. The galvanostatic charge-discharge (GCD) experiments were conducted under different current densities of 20, 30 and 40&#xa0;A/gm, revealing consistently high-performance metrics at the 10% rGO concentration. These findings offer a constructive pathway for the advancement of mixtures with distinct constitutive attributes and improved electrochemical performance, particularly for applications in power storage.</p>

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Fabrication of rGO decorated CdO nanocomposite for enhanced performance of supercapacitor

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • Amol K. Paimode,
  • Pravin R. Kakade,
  • A. A. Zaware,
  • Sukadeo L. Kadam

摘要

In this research, cadmium oxide (CdO) nanoparticles were prepared through an innovative sol-gel auto-combustion technique. For the preparation of rGO nanoparticles, we employed a simple Hummer’s method. The crystallite sizes of CdO and rGO were determined to be 27.79 nm and 2.23 nm, respectively. We then developed CdO-rGO composite by modifying rGO concentrations to 5% and 10%, which were evaluated as positive electrodes demonstrating exceptional energy storage capabilities. The synthesis of these nanocomposites followed a controlled weight% method. Notably, the composite containing 10% rGO exhibited an outstanding specific electrochemical capacitance value of 1527.14 F/gm and energy density of 240 Wh/Kg, tested in a KOH solution 3 M electrolyte, across a potential window of 0.0 to 0.6 V. This enhancement in effectiveness is linked to the presence of conductive rGO, which boosts rapid charge transfer kinetics. Furthermore, our results indicated that the specific electrochemical capacitance of the fabricated electrodes boosted with the rising amount of rGO in the structure. The galvanostatic charge-discharge (GCD) experiments were conducted under different current densities of 20, 30 and 40 A/gm, revealing consistently high-performance metrics at the 10% rGO concentration. These findings offer a constructive pathway for the advancement of mixtures with distinct constitutive attributes and improved electrochemical performance, particularly for applications in power storage.