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<p>Among different energy storage systems, supercapacitors (SC<sub>s</sub>) are acknowledged as highly emerging devices favored for their superior energy density (<i>E</i><sub>d</sub>), fast charge–discharge performance and prolonged lifespan. In SCs, the electrode material serves as the core component that primarily determines the charge storage capacity and its comprehensive electrochemical behavior. For the preparation of SC electrode material, CoFe<sub>2</sub>O<sub>4</sub>/rGO has been fabricated through a hydrothermal process. The successful fabrication of CoFe<sub>2</sub>O<sub>4</sub>/rGO nanocomposite was confirmed through physical studies, including FTIR, XRD, SEM, TGA, and BET, which were utilized to examine the functional, structural, morphological, thermal properties and specific surface area (SSA) of the composite. The addition of rGO resulted in an increased surface area&#xa0;(92.5 m2/g), improved structural integrity and enhanced&#xa0;electrical conductivity. From electrochemical studies, the fabricated composite demonstrated higher specific capacitance (<i>C</i><sub>s</sub>) of 1453 F/g and it delivered an enhanced energy density (<i>E</i><sub>d</sub>) of 37 Wh/kg as compared to pure CoFe<sub>2</sub>O<sub>4</sub> at 1&#xa0;A/g, with stable capacitive retention after 4900 cycles, ensuring its long-term stability. Furthermore, to assess the practical device-level performance, an asymmetric two-electrode supercapacitor (ASC) was assembled, which delivered a <i>C</i><sub>s</sub> of 140.89 F/g, a high <i>E</i><sub>d</sub> of 46.53&#xa0;Wh/kg, and a power density (<i>P</i><sub>d</sub>) of 771.03 W/kg. The elevated performance is due to the interactive effect of rGO, which enhanced the conductive ability and ionic transport. This study shows that the CoFe<sub>2</sub>O<sub>4</sub>/rGO nanocomposite’s superior electrochemical properties&#xa0;make it a better electrode for&#xa0;SC applications.</p>

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Hydrothermal synthesis of carbon–based CoFe2O4 nanocomposite: a hybrid electrode for supercapacitor application

  • 期刊论文

  • 发表日期：

    2026年5月27日

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  • Umair Muhammad,
  • B. M. Alotaibi,
  • Haifa A. Alyousef,
  • Albandari W. Alrowaily,
  • Hussain Sawwan,
  • Waqas Ul Arifeen,
  • Abhinav Kumar,
  • Rizwan Ul Hassan

摘要

Among different energy storage systems, supercapacitors (SCs) are acknowledged as highly emerging devices favored for their superior energy density (Ed), fast charge–discharge performance and prolonged lifespan. In SCs, the electrode material serves as the core component that primarily determines the charge storage capacity and its comprehensive electrochemical behavior. For the preparation of SC electrode material, CoFe2O4/rGO has been fabricated through a hydrothermal process. The successful fabrication of CoFe2O4/rGO nanocomposite was confirmed through physical studies, including FTIR, XRD, SEM, TGA, and BET, which were utilized to examine the functional, structural, morphological, thermal properties and specific surface area (SSA) of the composite. The addition of rGO resulted in an increased surface area (92.5 m2/g), improved structural integrity and enhanced electrical conductivity. From electrochemical studies, the fabricated composite demonstrated higher specific capacitance (Cs) of 1453 F/g and it delivered an enhanced energy density (Ed) of 37 Wh/kg as compared to pure CoFe2O4 at 1 A/g, with stable capacitive retention after 4900 cycles, ensuring its long-term stability. Furthermore, to assess the practical device-level performance, an asymmetric two-electrode supercapacitor (ASC) was assembled, which delivered a Cs of 140.89 F/g, a high Ed of 46.53 Wh/kg, and a power density (Pd) of 771.03 W/kg. The elevated performance is due to the interactive effect of rGO, which enhanced the conductive ability and ionic transport. This study shows that the CoFe2O4/rGO nanocomposite’s superior electrochemical properties make it a better electrode for SC applications.