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<p>A cost-effective synthesis of a novel SnO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub>-SnFe<sub>2</sub>O<sub>4</sub> nanocomposite was achieved using the sol–gel method, followed by comprehensive characterization. Phase formation was verified through x-ray diffraction (XRD), while Fourier transform infrared (FTIR) spectroscopy provided information on the chemical bonding. The surface morphology and microstructure were examined via field emission scanning electron microscopy (FESEM), and the elemental composition was confirmed using energy-dispersive x-ray spectroscopy (EDS). Importantly, the nanoparticles were directly fabricated into a binder-free anode without the need for any pre- or postheat treatment, simplifying the preparation process. The electrochemical performance was investigated in NaOH and Na<sub>2</sub>SO<sub>4</sub> electrolytes using a three-electrode setup. Techniques including cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) were applied to evaluate energy storage properties. The findings emphasize the critical influence of electrolyte choice on electrochemical behavior and its charge storage mechanism. The electrode performed better in NaOH electrolyte, with a specific capacitance of ~514&#xa0;F/g due to the improved ionic conductivity in an alkaline medium. The resulting anode demonstrated excellent electrochemical performance, indicating strong potential for high-performance supercapacitor applications.</p> Graphical Abstract <p></p>

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Binder-Free Architecture of SnO2-Fe2O3-SnFe2O4 Mixed Oxide Nanocomposite for Supercapacitor Electrode

  • 期刊论文

  • 发表日期：

    2026年8月3日

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  • Amanpreet Kaur,
  • Navneet Kaur,
  • Avtar Singh,
  • Vandana Shinde,
  • Raminder Kaur

摘要

A cost-effective synthesis of a novel SnO2-Fe2O3-SnFe2O4 nanocomposite was achieved using the sol–gel method, followed by comprehensive characterization. Phase formation was verified through x-ray diffraction (XRD), while Fourier transform infrared (FTIR) spectroscopy provided information on the chemical bonding. The surface morphology and microstructure were examined via field emission scanning electron microscopy (FESEM), and the elemental composition was confirmed using energy-dispersive x-ray spectroscopy (EDS). Importantly, the nanoparticles were directly fabricated into a binder-free anode without the need for any pre- or postheat treatment, simplifying the preparation process. The electrochemical performance was investigated in NaOH and Na2SO4 electrolytes using a three-electrode setup. Techniques including cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) were applied to evaluate energy storage properties. The findings emphasize the critical influence of electrolyte choice on electrochemical behavior and its charge storage mechanism. The electrode performed better in NaOH electrolyte, with a specific capacitance of ~514 F/g due to the improved ionic conductivity in an alkaline medium. The resulting anode demonstrated excellent electrochemical performance, indicating strong potential for high-performance supercapacitor applications.

Graphical Abstract