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<p>Metal ferrites have been widely explored for supercapacitor applications due to their structural stability, several redox states, and remarkable pseudocapacitive behavior. In this study, the solution combustion technique has been employed to synthesize a SrFe<sub>2</sub>O<sub>4</sub>/NiFe<sub>2</sub>O<sub>4</sub> (SFO/NFO) nanocomposite to observe the electrochemical characteristics. Morphological and structural investigations, such as XRD, FTIR, FESEM, TEM, BET, and XPS, revealed the effective formation of a nanocomposite with distinguished phases. SFO/NFO revealed an enhanced specific capacitance of 810 F g<sup>−1</sup> (1296 mF cm<sup>−2</sup>) at a current density of 1 A g<sup>−1</sup> and 1052 F g<sup>−1</sup> (1683 mF cm<sup>−2</sup>) at a scan rate of 1&#xa0;mV&#xa0;s<sup>−1</sup> with low charge transfer resistance, signifying fast electron transport and quick ion diffusion. The practical applicability has been established by the fabrication of a symmetric supercapacitor device using the SFO/NFO electrode, which illuminated a red LED bulb for 1&#xa0;min. The mutual interaction between SFO and NFO renders an effective option for the as-synthesized nanocomposite to be used as a promising electrode for supercapacitor applications.</p>

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Investigation and fabrication of SrFe2O4/NiFe2O4 nanocomposite electrode for symmetric supercapacitor applications

  • 期刊论文

  • 发表日期：

    2026年5月7日

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  • K. Sharath,
  • Y. Vidyalakshmi,
  • T. Thilagavathi,
  • J. Christina Rhoda

摘要

Metal ferrites have been widely explored for supercapacitor applications due to their structural stability, several redox states, and remarkable pseudocapacitive behavior. In this study, the solution combustion technique has been employed to synthesize a SrFe2O4/NiFe2O4 (SFO/NFO) nanocomposite to observe the electrochemical characteristics. Morphological and structural investigations, such as XRD, FTIR, FESEM, TEM, BET, and XPS, revealed the effective formation of a nanocomposite with distinguished phases. SFO/NFO revealed an enhanced specific capacitance of 810 F g−1 (1296 mF cm−2) at a current density of 1 A g−1 and 1052 F g−1 (1683 mF cm−2) at a scan rate of 1 mV s−1 with low charge transfer resistance, signifying fast electron transport and quick ion diffusion. The practical applicability has been established by the fabrication of a symmetric supercapacitor device using the SFO/NFO electrode, which illuminated a red LED bulb for 1 min. The mutual interaction between SFO and NFO renders an effective option for the as-synthesized nanocomposite to be used as a promising electrode for supercapacitor applications.