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<p>This research presents the fabrication of a NiFe₂O₄@MWCNTs/TiO₂ (NMT) ternary nanocomposite. XRD analysis revealed the formation of cubic NiFe₂O₄ crystals with an average size of 36&#xa0;nm. Surface area measurements showed 45.54 m<sup>2</sup>/g for pristine NiFe₂O₄, 289.63 m<sup>2</sup>/g for MWCNTs, 68.52 m<sup>2</sup>/g for the NiFe₂O₄@MWCNTs binary composite, and.70.5 m<sup>2</sup>/g for the complete NMT system. The characterization confirmed that both NiFe₂O₄ and TiO₂ maintained their crystalline phases while preserving the structural characteristics of the carbon nanotubes. Electrochemical testing was conducted using a 1&#xa0;M KOH electrolyte across a 0.0–0.8&#xa0;V potential range. Cyclic voltammetry measurements revealed outstanding capacitive behaviour, achieving a maximum specific capacitance of 335.3 F/g at 5&#xa0;mV/s scan rate. GCD testing validated these results, delivering 297.5 F/g specific capacitance at 1 A/g current density. The material demonstrated notable energy storage metrics with an energy density of 95.2 Wh/kg at 1 A/g and a maximum power density of 5.7&#xa0;kW/kg at 4 A/g, indicating suitability for high-power applications. Durability assessment through 5000 consecutive cycles at 5 A/g showed 96.2% capacitance retention, confirming excellent long-term stability. Electrochemical impedance spectroscopy conducted from 100&#xa0;kHz to 100&#xa0;MHz revealed a charge transfer resistance of 8.5 Ω with clear Warburg behaviour, indicating favourable ion transport kinetics. These results collectively demonstrate the NMT nanocomposite’s superior electrochemical characteristics and its viability as an advanced electrode material for supercapacitor technology.</p>

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Electrochemical performance of cubic NiFe₂O₄@MWCNTs/TiO₂ nanocomposite for supercapacitor applications

  • 期刊论文

  • 发表日期：

    2025年10月7日

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  • Davis Varghese,
  • E. Kavitha,
  • P. Joselene Suzan Jennifer,
  • S. Muthupandi,
  • Kasinthan Kaviyarasu,
  • M. Victor Antony Raj

摘要

This research presents the fabrication of a NiFe₂O₄@MWCNTs/TiO₂ (NMT) ternary nanocomposite. XRD analysis revealed the formation of cubic NiFe₂O₄ crystals with an average size of 36 nm. Surface area measurements showed 45.54 m2/g for pristine NiFe₂O₄, 289.63 m2/g for MWCNTs, 68.52 m2/g for the NiFe₂O₄@MWCNTs binary composite, and.70.5 m2/g for the complete NMT system. The characterization confirmed that both NiFe₂O₄ and TiO₂ maintained their crystalline phases while preserving the structural characteristics of the carbon nanotubes. Electrochemical testing was conducted using a 1 M KOH electrolyte across a 0.0–0.8 V potential range. Cyclic voltammetry measurements revealed outstanding capacitive behaviour, achieving a maximum specific capacitance of 335.3 F/g at 5 mV/s scan rate. GCD testing validated these results, delivering 297.5 F/g specific capacitance at 1 A/g current density. The material demonstrated notable energy storage metrics with an energy density of 95.2 Wh/kg at 1 A/g and a maximum power density of 5.7 kW/kg at 4 A/g, indicating suitability for high-power applications. Durability assessment through 5000 consecutive cycles at 5 A/g showed 96.2% capacitance retention, confirming excellent long-term stability. Electrochemical impedance spectroscopy conducted from 100 kHz to 100 MHz revealed a charge transfer resistance of 8.5 Ω with clear Warburg behaviour, indicating favourable ion transport kinetics. These results collectively demonstrate the NMT nanocomposite’s superior electrochemical characteristics and its viability as an advanced electrode material for supercapacitor technology.