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<p>To improve the electrochemical characteristics of MOFs used as supercapacitor electrode materials, three Ni-MOFs materials, Ni-MOFs-P, Ni-MOFs-L, Ni-MOFs-E, were synthesized by one-step hydrothermal method using terephthalic acid (PTA), biphenyl dicarboxylic acid (BPDC) and stilbene dicarboxylic acid (SDC) as ligands, respectively, and the structure-activity relationship was discussed combining the electrochemical properties of Ni-MOFs based on benzene carboxylic acid derivative ligands. It is found that the morphology, specific surface areas, and electrochemical properties of Ni-MOFs were adjusted by changing the structures of the benzene carboxylic acid derivative ligands. The greatest specific capacitance of 2300.60&#xa0;F/g for the Ni-MOFs-P electrode was attributed to smaller steric hindrance and better crystallinity of PTA, which makes Ni-MOFs-P exhibited outstanding multiplicative characteristics at 1&#xa0;A/g current density. The Ni-MOFs-P//AC asymmetric supercapacitor device achieving a maximum energy density of 58.49 Wh/kg within a voltage window of 1.6&#xa0;V. In addition, after 5,000 charge/discharge cycles, it maintains 71.9% capacitance retention compared to its initial capacitance. This study confirms that the structure of organic ligands substantially influences the evaluation of high-performance supercapacitors MOFs-based electrode materials.</p>

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Preparation of Ni-MOFs supercapacitor electrode materials based on benzene carboxylic acid derivative ligands and their structure-activity relationship

  • 期刊论文

  • 发表日期：

    2026年1月2日

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  • Liguo Wei,
  • Run Wang,
  • Lishuang Zhao,
  • Zhuo Ren,
  • Haihong Bai,
  • Zihan Zhang,
  • Yunting Ju,
  • Yuan He

摘要

To improve the electrochemical characteristics of MOFs used as supercapacitor electrode materials, three Ni-MOFs materials, Ni-MOFs-P, Ni-MOFs-L, Ni-MOFs-E, were synthesized by one-step hydrothermal method using terephthalic acid (PTA), biphenyl dicarboxylic acid (BPDC) and stilbene dicarboxylic acid (SDC) as ligands, respectively, and the structure-activity relationship was discussed combining the electrochemical properties of Ni-MOFs based on benzene carboxylic acid derivative ligands. It is found that the morphology, specific surface areas, and electrochemical properties of Ni-MOFs were adjusted by changing the structures of the benzene carboxylic acid derivative ligands. The greatest specific capacitance of 2300.60 F/g for the Ni-MOFs-P electrode was attributed to smaller steric hindrance and better crystallinity of PTA, which makes Ni-MOFs-P exhibited outstanding multiplicative characteristics at 1 A/g current density. The Ni-MOFs-P//AC asymmetric supercapacitor device achieving a maximum energy density of 58.49 Wh/kg within a voltage window of 1.6 V. In addition, after 5,000 charge/discharge cycles, it maintains 71.9% capacitance retention compared to its initial capacitance. This study confirms that the structure of organic ligands substantially influences the evaluation of high-performance supercapacitors MOFs-based electrode materials.