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<p>This study reports the synthesis of magnetic iron oxide (Fe<sub>3</sub>O<sub>4</sub>) nanoparticles using Aegle marmelos pulp extract as a green reducing agent. The formation of Fe<sub>3</sub>O<sub>4</sub> nanoparticle with a cubic crystal structure was confirmed by X-ray diffraction (XRD) and transmission electron microscopy (TEM), which indicated crystallite sizes in the 10–13 nm range. Magnetic property analysis through vibrating sample magnetometer (VSM) measurements revealed a superparamagnetic nature with a saturation magnetization (Ms) of 41.99 emu/g. The electrochemical performance of the synthesized electrode material was evaluated using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) in a 1 M KOH electrolyte. The electrode exhibited a specific capacitance of 1348 F/g at a current density of 3 mA/cm<sup>2</sup>, along with an energy density of 46.8 Wh/kg and a power density of 500 W/kg. Furthermore, the electrode demonstrated excellent stability, retaining over 93.34% of its initial capacitance after 3000 GCD cycles. These findings indicate that the green-synthesized Fe<sub>3</sub>O<sub>4</sub> electrode is a promising candidate for high-performance supercapacitor applications.</p>

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Energy storage studies of a novel green route synthesized high-performance supercapacitor based on Fe3O4

  • 期刊论文

  • 发表日期：

    2025年12月22日

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  • Amol B. Pandhare,
  • Swapnajit V. Mulik,
  • Basem E. Keshta,
  • Prashant N. Nikam,
  • Manikandan Ayyar,
  • S. Santhoshkumar,
  • Saravanan Rajendran,
  • Hany Koheil,
  • Mohan R.Kadam,
  • AbdAllah A. Alotibi,
  • Sagar D. Delekar,
  • Rajendra P. Patil

摘要

This study reports the synthesis of magnetic iron oxide (Fe3O4) nanoparticles using Aegle marmelos pulp extract as a green reducing agent. The formation of Fe3O4 nanoparticle with a cubic crystal structure was confirmed by X-ray diffraction (XRD) and transmission electron microscopy (TEM), which indicated crystallite sizes in the 10–13 nm range. Magnetic property analysis through vibrating sample magnetometer (VSM) measurements revealed a superparamagnetic nature with a saturation magnetization (Ms) of 41.99 emu/g. The electrochemical performance of the synthesized electrode material was evaluated using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) in a 1 M KOH electrolyte. The electrode exhibited a specific capacitance of 1348 F/g at a current density of 3 mA/cm2, along with an energy density of 46.8 Wh/kg and a power density of 500 W/kg. Furthermore, the electrode demonstrated excellent stability, retaining over 93.34% of its initial capacitance after 3000 GCD cycles. These findings indicate that the green-synthesized Fe3O4 electrode is a promising candidate for high-performance supercapacitor applications.