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<p>This research focuses on the synthesis, characterization, and electrochemical performance of a Cobalt-based Metal–Organic Framework (Co-MOF) developed via the solvothermal method for high-performance supercapacitor applications. The optical bandgap of the synthesized Co-MOF was estimated to be 4.77&#xa0;eV from Tauc’s plot, classifying it as a wide bandgap material. SEM analysis revealed a spherical morphology, primarily due to the interaction between Co metal ions and the BTC linker. X-ray diffraction analysis showed that the Co-MOF possesses a crystallite size of approximately 56.6&#xa0;nm. BET analysis indicated a Type IV isotherm, with a specific surface area of 24.197 m<sup>2</sup>/g, signifying sufficient porosity and active sites for electrochemical interactions. Electrochemical measurements in a three-electrode setup demonstrated a high specific capacitance of 571.73 F/g at 1 A/g, along with excellent cycling stability, retaining 96.87% of its initial capacitance. Furthermore, the fabricated symmetric supercapacitor device (SSD) displayed outstanding long-term cycling stability, maintaining 92.15% capacitance retention after 5000 cycles. The device also achieved an impressive energy density of 70.48 Wh/kg and a power density of 1335.45 W/kg, which indicates excellent electrochemical functionalities, supporting their application in the field of energy storage.</p>

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Facile solvothermal fabrication of cobalt-metal–organic framework (Co-MOF)-based electrode material for supercapacitor devices

  • 期刊论文

  • 发表日期：

    2025年8月25日

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  • V. Snowlin,
  • J. Snowban,
  • H. Joy Prabu,
  • A. Felix Sahayaraj,
  • J. Sophia,
  • A. Joseph Sagaya Kennedy

摘要

This research focuses on the synthesis, characterization, and electrochemical performance of a Cobalt-based Metal–Organic Framework (Co-MOF) developed via the solvothermal method for high-performance supercapacitor applications. The optical bandgap of the synthesized Co-MOF was estimated to be 4.77 eV from Tauc’s plot, classifying it as a wide bandgap material. SEM analysis revealed a spherical morphology, primarily due to the interaction between Co metal ions and the BTC linker. X-ray diffraction analysis showed that the Co-MOF possesses a crystallite size of approximately 56.6 nm. BET analysis indicated a Type IV isotherm, with a specific surface area of 24.197 m2/g, signifying sufficient porosity and active sites for electrochemical interactions. Electrochemical measurements in a three-electrode setup demonstrated a high specific capacitance of 571.73 F/g at 1 A/g, along with excellent cycling stability, retaining 96.87% of its initial capacitance. Furthermore, the fabricated symmetric supercapacitor device (SSD) displayed outstanding long-term cycling stability, maintaining 92.15% capacitance retention after 5000 cycles. The device also achieved an impressive energy density of 70.48 Wh/kg and a power density of 1335.45 W/kg, which indicates excellent electrochemical functionalities, supporting their application in the field of energy storage.