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<p>As appetite steadily grows for sustainable in the same vein high-performance need for better energy storage has sparked a surge of research into activated carbon-based supercapacitor electrodes derived from biomass. They have attracted immense interest due to its cost-effectiveness, natural abundance, eco-friendly synthesis, from agricultural waste, fruit peels, and plant residues exhibits tunable porosity, a substantial surface area-rich surface and active sites, making it highly suitable for electrochemical applications. The synthesis of ACB/g-C<sub>3</sub>N<sub>4</sub>/NiO nanocomposite involved the use of Ni(NO<sub>3</sub>)<sub>2</sub>, NaOH, melamine, banana peel waste, HCl, KOH, PVDF, − (C<sub>2</sub>H<sub>2</sub>F<sub>2</sub>)<sub><i>n</i></sub> −), carbon black, and&#xa0;<i>N</i>-methyl-2-pyrrolidone. Banana peel waste as a cost-effective and eco-friendly precursor was used to synthesize activated carbon (ACB) and was subsequently combined with g-C<sub>3</sub>N<sub>4</sub> and NiO to form a hybrid nanocomposite with enhanced electrochemical performance. Electrochemical performance of ACB/g-C<sub>3</sub>N<sub>4</sub>/NiO shows a high specific capacitance of 883.26 Fg<sup>−1</sup> at 1 Ag<sup>−1</sup>, excellent cycling stability with 94.21% retention over 5000 cycles in three-electrode system. ACB/g-C<sub>3</sub>N<sub>4</sub>/NiO device demonstrated an energy density of 57.84 Wh kg⁻<sup>1</sup> and power density of 3838.87 Wkg⁻<sup>1</sup>, highlighting its excellent charge storage capability. The electrode maintains exceptional cycling stability, a remarkable 92.82% capacitance retention was observed after 10,000 cycles, confirming the long term.</p>

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Engineering asymmetric hybrid supercapacitor electrode ACB/g-C3N4/NiO nanocomposite for high-performance energy storage

  • 期刊论文

  • 发表日期：

    2025年11月28日

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  • T. Gayathri,
  • B. Kavitha,
  • Manikandan Ayyar,
  • M. Nirmala,
  • V. Mohanavel,
  • Saravanan Rajendran,
  • M. Santhamoorthy,
  • S. Santhoshkumar

摘要

As appetite steadily grows for sustainable in the same vein high-performance need for better energy storage has sparked a surge of research into activated carbon-based supercapacitor electrodes derived from biomass. They have attracted immense interest due to its cost-effectiveness, natural abundance, eco-friendly synthesis, from agricultural waste, fruit peels, and plant residues exhibits tunable porosity, a substantial surface area-rich surface and active sites, making it highly suitable for electrochemical applications. The synthesis of ACB/g-C3N4/NiO nanocomposite involved the use of Ni(NO3)2, NaOH, melamine, banana peel waste, HCl, KOH, PVDF, − (C2H2F2)n −), carbon black, and N-methyl-2-pyrrolidone. Banana peel waste as a cost-effective and eco-friendly precursor was used to synthesize activated carbon (ACB) and was subsequently combined with g-C3N4 and NiO to form a hybrid nanocomposite with enhanced electrochemical performance. Electrochemical performance of ACB/g-C3N4/NiO shows a high specific capacitance of 883.26 Fg−1 at 1 Ag−1, excellent cycling stability with 94.21% retention over 5000 cycles in three-electrode system. ACB/g-C3N4/NiO device demonstrated an energy density of 57.84 Wh kg⁻1 and power density of 3838.87 Wkg⁻1, highlighting its excellent charge storage capability. The electrode maintains exceptional cycling stability, a remarkable 92.82% capacitance retention was observed after 10,000 cycles, confirming the long term.