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<p>The aim of this work was to synthesize zinc-functionalized reduced graphene oxide hydrogel (Zn-rGO-Hy) from graphene oxide (GO) and to evaluate its suitability as an electrode material for supercapacitors. Zn-rGO-Hy was synthesized through self-assembly reduction of GO in the presence of nano-zinc precursors. structural and morphological features were characterized using UV–Vis spectroscopy, X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, FT-Raman spectroscopy, Scanning electron microscopy (SEM), Energy-dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS), Brunner–Emmett–Teller (BET), Thermogravimetric analysis – differential scanning calorimetry. (TG-DSC) analysis and electrochemical properties were studied in 6&#xa0;M KOH electrolyte by cyclic voltammetry (CV), Galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS), Cyclic stability. electrochemical measurements showed a specific capacitance of 478&#xa0;F/g at 1&#xa0;A/g, with 92.61% retention at 3&#xa0;A/g. thus, zinc-functionalized (Zn-rGO-Hy) hydrogel significantly enhances electrochemical performance, indicating its promise as an efficient electrode material for advanced supercapacitors.</p> Graphical abstract <p></p>

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Zinc functionalized reduced graphene oxide hydrogel: A potential paradigm for advanced energy storage applications

  • 期刊论文

  • 发表日期：

    2026年6月15日

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  • Maya Das,
  • Anju Kumari Das,
  • Anup Karn,
  • Shova Neupane,
  • Dipak Kumar Gupta,
  • Amar Prasad Yadav

摘要

The aim of this work was to synthesize zinc-functionalized reduced graphene oxide hydrogel (Zn-rGO-Hy) from graphene oxide (GO) and to evaluate its suitability as an electrode material for supercapacitors. Zn-rGO-Hy was synthesized through self-assembly reduction of GO in the presence of nano-zinc precursors. structural and morphological features were characterized using UV–Vis spectroscopy, X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, FT-Raman spectroscopy, Scanning electron microscopy (SEM), Energy-dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS), Brunner–Emmett–Teller (BET), Thermogravimetric analysis – differential scanning calorimetry. (TG-DSC) analysis and electrochemical properties were studied in 6 M KOH electrolyte by cyclic voltammetry (CV), Galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS), Cyclic stability. electrochemical measurements showed a specific capacitance of 478 F/g at 1 A/g, with 92.61% retention at 3 A/g. thus, zinc-functionalized (Zn-rGO-Hy) hydrogel significantly enhances electrochemical performance, indicating its promise as an efficient electrode material for advanced supercapacitors.

Graphical abstract