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<p>This study presents the synthesis of Zn<sub>0.5</sub>Co<sub>0.5</sub>O nanorods via a hydrothermal method for supercapacitor applications. XRD confirmed a cubic phase, and FESEM revealed a unique wheat-embedded morphology with interwoven fibrous rods, enhancing surface area (168&#xa0;m<sup>2</sup>/g) and porosity. XPS and BET analyses confirmed the successful incorporation of Zn2⁺ ions and the material’s porous structure, aiding electrolyte penetration. Electrochemical testing showed a maximum specific capacitance of 1120.13&#xa0;F/g at 2&#xa0;A/g, an energy density (<i>E</i><sub>d</sub>) of 105.98&#xa0;Wh/kg, and power density (<i>P</i><sub>d</sub>) of 2712&#xa0;W/kg. Dunn’s model analysis highlighted that diffusion-controlled redox reactions dominate, indicating battery-type behavior. In an asymmetric supercapacitor (ASC) configuration, Zn<sub>0.5</sub>Co<sub>0.5</sub>O achieved 712.6&#xa0;F/g at 2&#xa0;A/g along with <i>E</i><sub>d</sub> of 66.14&#xa0;W/kg and a <i>P</i><sub>d</sub> of 2514.39&#xa0;W/kg, retaining 91.3% capacitance after 8000 cycles. Zn doping and CoO’s redox-active nature enhanced charge storage kinetics. These findings establish Zn<sub>0.5</sub>Co<sub>0.5</sub>O as a promising material for advanced energy storage devices.</p>

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Zn0.5Co0.5O nanorods as a promising electrode material for high-energy supercapacitors

  • 期刊论文

  • 发表日期：

    2026年2月24日

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  • Ebraheem Abdu Musad Saleh,
  • Najam Ul Hassan,
  • Sana Ullah Asif,
  • Nusrat Shaheen,
  • Nusiba M. M. Alshik,
  • Ismail Hassan,
  • M. M. Moharam,
  • Asmaa F. Kassem,
  • Maria Sadiq

摘要

This study presents the synthesis of Zn0.5Co0.5O nanorods via a hydrothermal method for supercapacitor applications. XRD confirmed a cubic phase, and FESEM revealed a unique wheat-embedded morphology with interwoven fibrous rods, enhancing surface area (168 m2/g) and porosity. XPS and BET analyses confirmed the successful incorporation of Zn2⁺ ions and the material’s porous structure, aiding electrolyte penetration. Electrochemical testing showed a maximum specific capacitance of 1120.13 F/g at 2 A/g, an energy density (Ed) of 105.98 Wh/kg, and power density (Pd) of 2712 W/kg. Dunn’s model analysis highlighted that diffusion-controlled redox reactions dominate, indicating battery-type behavior. In an asymmetric supercapacitor (ASC) configuration, Zn0.5Co0.5O achieved 712.6 F/g at 2 A/g along with Ed of 66.14 W/kg and a Pd of 2514.39 W/kg, retaining 91.3% capacitance after 8000 cycles. Zn doping and CoO’s redox-active nature enhanced charge storage kinetics. These findings establish Zn0.5Co0.5O as a promising material for advanced energy storage devices.