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<p>Nickel oxide (NiO) nanoflowers decorated with reduced graphene oxide (RGO) were synthesised via the cost-effective hydrothermal method, followed by calcination to form composites. Various analytical techniques including FE-SEM, XRD, UV-visible, and Raman were employed to characterize the morphological, structural, and optical properties of the specimens, respectively. Electrochemical properties of NiO nano flower and RGO-decorated NiO nanoflowers (NRGO) materials, were evaluated through cyclic voltammetry, galvanostatic charge-discharge testing, and electrochemical impedance analysis. Findings indicate that the addition of RGO enhances the reversibility of NiO as an electrode material by providing a continuous framework and more active sites for redox reactions due to its unique configuration. The specific capacitance of the NRGO3 composites reached 396 Fg<sup>− 1</sup> in a 6&#xa0;M KOH electrolyte at a scan rate of 10 mV/s and has the lowest R<sub>CT</sub> value compared to others. All the samples have shown good stability with a percentage of retention of more than 80%, suggesting that, it is a good electrode material for energy storage applications.</p>

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RGO flakes decorated NiO nanoflowers for supercapacitor applications-synthesis and characterizations

  • 期刊论文

  • 发表日期：

    2025年2月21日

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  • Dhirendra Jha,
  • Bhargavi Somapur,
  • Abhijit Paul,
  • C. Kavitha,
  • Nagaiah Kambhala

摘要

Nickel oxide (NiO) nanoflowers decorated with reduced graphene oxide (RGO) were synthesised via the cost-effective hydrothermal method, followed by calcination to form composites. Various analytical techniques including FE-SEM, XRD, UV-visible, and Raman were employed to characterize the morphological, structural, and optical properties of the specimens, respectively. Electrochemical properties of NiO nano flower and RGO-decorated NiO nanoflowers (NRGO) materials, were evaluated through cyclic voltammetry, galvanostatic charge-discharge testing, and electrochemical impedance analysis. Findings indicate that the addition of RGO enhances the reversibility of NiO as an electrode material by providing a continuous framework and more active sites for redox reactions due to its unique configuration. The specific capacitance of the NRGO3 composites reached 396 Fg− 1 in a 6 M KOH electrolyte at a scan rate of 10 mV/s and has the lowest RCT value compared to others. All the samples have shown good stability with a percentage of retention of more than 80%, suggesting that, it is a good electrode material for energy storage applications.