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<p>The fabrication of hybrid supercapacitor that combines the features of a battery and a supercapacitor into one unit is crucial in realm of energy crisis. Here, we have reported a facile synthesis of Cu-complex derived from isonicotinic acid (INA) and 2D Cu-MOF (metal organic framework) containing 4,4-bipyridine (Bpy). For structural elucidation, efficient tools such as scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), BET (Brunauer–Emmett–Teller) analysis, Fourier transform infrared (FTIR) spectroscopy, and single-crystal X-ray diffraction (SCXRD) spectroscopy have been employed. To delve electrochemical applications, we have used modern techniques such as cyclic voltammetry (CV), galvanic charge–discharge (GCD), and electrochemical impedance spectrometry (EIS) via a three-electrode as well as two-electrode assembly in 1M KOH electrolyte. Cu-MOF exhibits better electrochemical performance, leading to its practical implementation in a hybrid device against activated carbon. The device demonstrates a remarkable specific capacity of 196.05&#xa0;C/g, specific capacitance of 392.11&#xa0;F/g, energy density of 26.15&#xa0;Wh/kg at 0.5&#xa0;A/g, and power density of 2095.23&#xa0;W/kg at 2.25&#xa0;A/g. To assess the stability, the device undergoes 10000 GCD cycles, offering a coulombic efficiency of 99.8% which supports its candidacy as a potential hybrid supercapacitor in the future.</p> Graphical abstract

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Electrochemical performance and structural investigation of nitrogen-containing copper complex and 2D copper-based metal-organic framework for hybrid supercapacitor applications

  • 期刊论文

  • 发表日期：

    2026年5月9日

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  • Sidra Farid,
  • Swera,
  • Muhammad Shahbaz,
  • Bisma,
  • Saira Ishaq,
  • Shahzad Sharif,
  • Fatima Jamil,
  • Muhammad Kamran Rafique,
  • Zakir Ullah

摘要

The fabrication of hybrid supercapacitor that combines the features of a battery and a supercapacitor into one unit is crucial in realm of energy crisis. Here, we have reported a facile synthesis of Cu-complex derived from isonicotinic acid (INA) and 2D Cu-MOF (metal organic framework) containing 4,4-bipyridine (Bpy). For structural elucidation, efficient tools such as scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), BET (Brunauer–Emmett–Teller) analysis, Fourier transform infrared (FTIR) spectroscopy, and single-crystal X-ray diffraction (SCXRD) spectroscopy have been employed. To delve electrochemical applications, we have used modern techniques such as cyclic voltammetry (CV), galvanic charge–discharge (GCD), and electrochemical impedance spectrometry (EIS) via a three-electrode as well as two-electrode assembly in 1M KOH electrolyte. Cu-MOF exhibits better electrochemical performance, leading to its practical implementation in a hybrid device against activated carbon. The device demonstrates a remarkable specific capacity of 196.05 C/g, specific capacitance of 392.11 F/g, energy density of 26.15 Wh/kg at 0.5 A/g, and power density of 2095.23 W/kg at 2.25 A/g. To assess the stability, the device undergoes 10000 GCD cycles, offering a coulombic efficiency of 99.8% which supports its candidacy as a potential hybrid supercapacitor in the future.

Graphical abstract