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<p>This work investigates the influence of sintering temperature on the electrochemical performance of graphitic carbon nitride nanosheets grafted copper cobalt oxide (GCN-NS-g-CuCo₂O₄), synthesized via a one-step pyrolysis route. Structural and elemental analyses using X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDX) confirm the successful formation of GCN-NS-g-CuCo₂O₄ nanocomposites. Field-emission scanning electron microscopy (FESEM) revealed a porous morphology favorable for charge transport. Among the samples, the electrode sintered at 350&#xa0;°C (GCN-NS-g-CuCo₂O₄@350) exhibits a specific capacity of 113.24&#xa0;C g⁻<sup>1</sup> at 0.5&#xa0;A g⁻<sup>1</sup> in 6.0&#xa0;M KOH electrolyte. An asymmetric supercapacitor device (GCN-NS-g-CuCo₂O₄@350//AC) delivered a specific capacity of 76.51&#xa0;C g⁻<sup>1</sup> at 1.0&#xa0;A g⁻<sup>1</sup> and retains ~ 97.3% of its capacity after 2000 cycles, demonstrating excellent stability and potential for energy storage applications.</p>

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Tuning sintering temperature of copper cobalt oxide immobilized on graphitic carbon nitride for asymmetric supercapacitor performance

  • 期刊论文

  • 发表日期：

    2025年11月14日

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  • T. S. Lessa,
  • R. Suresh Babu,
  • L. M. Samyn,
  • M. Vinayagam,
  • R. Vinodh,
  • A. L. F. de Barros

摘要

This work investigates the influence of sintering temperature on the electrochemical performance of graphitic carbon nitride nanosheets grafted copper cobalt oxide (GCN-NS-g-CuCo₂O₄), synthesized via a one-step pyrolysis route. Structural and elemental analyses using X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDX) confirm the successful formation of GCN-NS-g-CuCo₂O₄ nanocomposites. Field-emission scanning electron microscopy (FESEM) revealed a porous morphology favorable for charge transport. Among the samples, the electrode sintered at 350 °C (GCN-NS-g-CuCo₂O₄@350) exhibits a specific capacity of 113.24 C g⁻1 at 0.5 A g⁻1 in 6.0 M KOH electrolyte. An asymmetric supercapacitor device (GCN-NS-g-CuCo₂O₄@350//AC) delivered a specific capacity of 76.51 C g⁻1 at 1.0 A g⁻1 and retains ~ 97.3% of its capacity after 2000 cycles, demonstrating excellent stability and potential for energy storage applications.