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<p>A CuCo<sub>2</sub>O<sub>4</sub>/C composite was produced from copper-cobalt metal–organic frameworks (MOFs) through controlled calcination at 700, 800, and 900&#xa0;°C under an N<sub>2</sub> atmosphere. Structural and morphological analyses confirmed the successful transition to mixed metal oxides, and 1&#xa0;M KOH was employed as the electrolyte for electrochemical assessments. In a three-electrode configuration, the calcined sample at 700&#xa0;°C (CuCo-700) exhibited a specific capacitance of 350 F g<sup>−1</sup> at a current density of 0.25 A g<sup>−1</sup> and retained 98% capacitance after 2500 cycles. These results represented a 96% enhancement compared to the non-calcined CuCo-MOF. The notable improvement was attributed to the optimised crystalline phases and active sites promoted by appropriate thermal treatment, facilitating more efficient redox reactions. An asymmetrical supercapacitor was assembled using CuCo-700 as the positive electrode and activated carbon as the negative electrode. This two-electrode device delivered a specific capacitance of 54 F g<sup>−1</sup> at 0.1 A g<sup>−1</sup>, while achieving an energy density of 14 Wh kg<sup>−1</sup> and a power density of 70&#xa0;W&#xa0;kg<sup>−1</sup>. These findings underscore the viability of employing MOF-derived CuCo<sub>2</sub>O<sub>4</sub>/C as a high-performance supercapacitor electrode, offering promising avenues for future energy storage research.</p> Graphical Abstract <p></p>

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Investigating the electrochemical characteristics of CuCo2O4/C composite derived from metal–organic frameworks as a promising supercapacitor electrode material

  • 期刊论文

  • 发表日期：

    2025年4月26日

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  • Abu Danish Aiman Bin Abu Sofian,
  • F. J. Juni,
  • S. R. Majid

摘要

A CuCo2O4/C composite was produced from copper-cobalt metal–organic frameworks (MOFs) through controlled calcination at 700, 800, and 900 °C under an N2 atmosphere. Structural and morphological analyses confirmed the successful transition to mixed metal oxides, and 1 M KOH was employed as the electrolyte for electrochemical assessments. In a three-electrode configuration, the calcined sample at 700 °C (CuCo-700) exhibited a specific capacitance of 350 F g−1 at a current density of 0.25 A g−1 and retained 98% capacitance after 2500 cycles. These results represented a 96% enhancement compared to the non-calcined CuCo-MOF. The notable improvement was attributed to the optimised crystalline phases and active sites promoted by appropriate thermal treatment, facilitating more efficient redox reactions. An asymmetrical supercapacitor was assembled using CuCo-700 as the positive electrode and activated carbon as the negative electrode. This two-electrode device delivered a specific capacitance of 54 F g−1 at 0.1 A g−1, while achieving an energy density of 14 Wh kg−1 and a power density of 70 W kg−1. These findings underscore the viability of employing MOF-derived CuCo2O4/C as a high-performance supercapacitor electrode, offering promising avenues for future energy storage research.

Graphical Abstract