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<p>In this work, manganese ferrite microfibers (MnFe<sub>2</sub>O<sub>4</sub>-<i>mf</i>) prepared by electrospinning and reduced graphene oxide sheets (RGOS) made by traditional hydrothermal methods were incorporated to form a RGOS@MnFe<sub>2</sub>O<sub>4</sub>-<i>mf</i> composite due to the noncovalent interaction. This RGOS@MnFe<sub>2</sub>O<sub>4</sub>-<i>mf</i> composite was further applied as a supercapacitor. A variety of characterization techniques, including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, FTIR spectroscopy, and X-ray photoelectron spectroscopy, were used to examine the RGOS@MnFe<sub>2</sub>O<sub>4</sub>-mf composite. In addition, galvanostatic charge–discharge (GCD) measurements and cyclic voltammetry (CV) data were collected in electrochemical experiments. The produced RGOS@MnFe<sub>2</sub>O<sub>4</sub>-<i>mf</i> composite showed a good surface area, a high energy storage capacity with noticeable endurance, and remarkable electrocatalysis capabilities. Based on the outcomes, RGOS@MnFe<sub>2</sub>O<sub>4</sub>-<i>mf</i>-coated nickel foam (NF) electrodes demonstrated relatively high supercapacitive performance of 1797 Fg<sup>−1</sup> at 1 Ag<sup>−1</sup>. Following charge and discharge in a 2.0&#xa0;M KOH aqueous electrolyte solution, the RGOS@MnFe<sub>2</sub>O<sub>4</sub>-mf/NF electrodes exhibited remarkable cyclic stability of around 99% at 5 Ag<sup>−1</sup>. We conclude that the synthesized RGOS@MnFe<sub>2</sub>O<sub>4</sub>-mf/NF electrode is useful for energy storage applications based on electrochemical capacitive measurements.</p>

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Electrospun-prepared metal ferrite microfibers incorporated with reduced graphene oxide for supercapacitor with excellent specific capacitance

  • 期刊论文

  • 发表日期：

    2025年7月25日

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  • Sivaramakrishnan Vinothini,
  • Arjunan Karthi Keyan,
  • Joel Skaria Joseph,
  • Ching-Lung Chen,
  • Subramanian Sakthinathan,
  • Te-Wei Chiu

摘要

In this work, manganese ferrite microfibers (MnFe2O4-mf) prepared by electrospinning and reduced graphene oxide sheets (RGOS) made by traditional hydrothermal methods were incorporated to form a RGOS@MnFe2O4-mf composite due to the noncovalent interaction. This RGOS@MnFe2O4-mf composite was further applied as a supercapacitor. A variety of characterization techniques, including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, FTIR spectroscopy, and X-ray photoelectron spectroscopy, were used to examine the RGOS@MnFe2O4-mf composite. In addition, galvanostatic charge–discharge (GCD) measurements and cyclic voltammetry (CV) data were collected in electrochemical experiments. The produced RGOS@MnFe2O4-mf composite showed a good surface area, a high energy storage capacity with noticeable endurance, and remarkable electrocatalysis capabilities. Based on the outcomes, RGOS@MnFe2O4-mf-coated nickel foam (NF) electrodes demonstrated relatively high supercapacitive performance of 1797 Fg−1 at 1 Ag−1. Following charge and discharge in a 2.0 M KOH aqueous electrolyte solution, the RGOS@MnFe2O4-mf/NF electrodes exhibited remarkable cyclic stability of around 99% at 5 Ag−1. We conclude that the synthesized RGOS@MnFe2O4-mf/NF electrode is useful for energy storage applications based on electrochemical capacitive measurements.