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<p>Nowadays, new electrode materials for energy storage devices like mixed ligands and bi-metal MOFs have attracted a lot of attention owing to their high porosity and high capacity for charge storage. In this study, a Co-based metal-organic framework (4,4’-bpy = 4,4′-Bipyridine and H<sub>3</sub>BTC = 1,3,5-Benzenetricarboxylic acid) was successfully fabricated by a hydrothermal method. To obtain good electrochemical behavior, Co-MOFs were modified using a porous spherical scaffold of NiS/Ni<sub>3</sub>S<sub>4</sub> nanoparticles. The electrochemical efficiency was analyzed by electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charge-discharge methods. Detailed electrochemical scrutiny performed by Co-MOF/NiS-Ni<sub>3</sub>S<sub>4</sub> in a 6&#xa0;M KOH electrolyte reveals a high specific capacity of 136.67 mAh/g at 1&#xa0;A/g, with a superb cycle life of 91%. Co-MOF/NiS-Ni<sub>3</sub>S<sub>4</sub>//AC asymmetric supercapacitor produces a large amount of energy density (33.32 Wh/kg) and power density (600&#xa0;W/kg). The produced composite is an appropriate candidate for electrodes in both batteries and hybrid supercapacitors, owing to its favorable electrochemical characteristics.</p>

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In-situ growth of NiS-Ni3S4 on dual-ligand Co-MOF as a new electrode for high-performance supercapacitors

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月7日

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  • Amir Hossein Alipour,
  • Mohammad Soleimani Lashkenari,
  • Mohsen Ghorbani,
  • Leila Asadi Kafshgari

摘要

Nowadays, new electrode materials for energy storage devices like mixed ligands and bi-metal MOFs have attracted a lot of attention owing to their high porosity and high capacity for charge storage. In this study, a Co-based metal-organic framework (4,4’-bpy = 4,4′-Bipyridine and H3BTC = 1,3,5-Benzenetricarboxylic acid) was successfully fabricated by a hydrothermal method. To obtain good electrochemical behavior, Co-MOFs were modified using a porous spherical scaffold of NiS/Ni3S4 nanoparticles. The electrochemical efficiency was analyzed by electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charge-discharge methods. Detailed electrochemical scrutiny performed by Co-MOF/NiS-Ni3S4 in a 6 M KOH electrolyte reveals a high specific capacity of 136.67 mAh/g at 1 A/g, with a superb cycle life of 91%. Co-MOF/NiS-Ni3S4//AC asymmetric supercapacitor produces a large amount of energy density (33.32 Wh/kg) and power density (600 W/kg). The produced composite is an appropriate candidate for electrodes in both batteries and hybrid supercapacitors, owing to its favorable electrochemical characteristics.