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<p>The development of hybrid supercapacitors has accelerated to meet the demand for fast-charging and discharging energy storage technologies in automotive and other energy storage applications. These supercapacitors combine the fast-charging benefits of capacitors with the high-energy density of batteries. To achieve this, it is essential to develop electrode materials with excellent electrochemical activity and rapid ion diffusion capabilities. This paper employs metal–organic framework (MOF) and MXene composites to address these challenges. Specifically, a one-dimensional linear nickel metal–organic framework (Ni-MOF) is grown in situ between MXene layers. The structure and morphology of the Ni-MOF were analyzed using X-ray diffraction, transmission electron microscopy (TEM), and scanning electron microscopy (SEM).The abundant Faradaic active sites and the enhanced kinetics from the synergy between the one-dimensional hollow structure and the two-dimensional layered structure resulted in a specific capacitance of 960&#xa0;F&#xa0;g<sup>−1</sup> for the Ni-MOF/MXene composite at a current density of 0.5&#xa0;A&#xa0;g<sup>−1</sup>. A Ni-MOF/MXene//AC device with an operating voltage of 1.6&#xa0;V was also fabricated, exhibiting a notable energy density of 26.1&#xa0;Wh&#xa0;kg<sup>−1</sup> and power density of 8000&#xa0;W&#xa0;kg<sup>−1</sup>. The device maintained 92.4% of its specific capacity after 5000 cycles, demonstrating excellent electrochemical performance. This study not only showcases the significant potential of Ni-MOF/MXene composites in electrochemical energy storage but also lays a theoretical foundation for the development of high-efficiency supercapacitors.</p> Graphical abstract <p>This study utilizes metal-organic framework (MOF) and MXene composites to address energy storage challenges. A one-dimensional Ni-MOF is grown in situ between MXene layers, resulting in a specific capacitance of 960 F g⁻¹ at 0.5 A g⁻¹. A Ni-MOF/MXene//AC device was also created, with an operating voltage of 1.6 V, an energy density of 26.1 Wh kg⁻¹, and a power density of 8000 W kg⁻¹. The device retained 92.4% of its capacity after 5000 cycles, demonstrating excellent performance.</p>

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In situ growth of Ni metal–organic framework/MXene composites for high‐performance supercapacitors

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Lei Wang,
  • Bingzhe Jia,
  • Huailin Yang,
  • Xinrui Qiang,
  • Jiarui Li,
  • Yichi Liu,
  • Zhiqiang Li,
  • Jialei Wang,
  • Xinming Wu

摘要

The development of hybrid supercapacitors has accelerated to meet the demand for fast-charging and discharging energy storage technologies in automotive and other energy storage applications. These supercapacitors combine the fast-charging benefits of capacitors with the high-energy density of batteries. To achieve this, it is essential to develop electrode materials with excellent electrochemical activity and rapid ion diffusion capabilities. This paper employs metal–organic framework (MOF) and MXene composites to address these challenges. Specifically, a one-dimensional linear nickel metal–organic framework (Ni-MOF) is grown in situ between MXene layers. The structure and morphology of the Ni-MOF were analyzed using X-ray diffraction, transmission electron microscopy (TEM), and scanning electron microscopy (SEM).The abundant Faradaic active sites and the enhanced kinetics from the synergy between the one-dimensional hollow structure and the two-dimensional layered structure resulted in a specific capacitance of 960 F g−1 for the Ni-MOF/MXene composite at a current density of 0.5 A g−1. A Ni-MOF/MXene//AC device with an operating voltage of 1.6 V was also fabricated, exhibiting a notable energy density of 26.1 Wh kg−1 and power density of 8000 W kg−1. The device maintained 92.4% of its specific capacity after 5000 cycles, demonstrating excellent electrochemical performance. This study not only showcases the significant potential of Ni-MOF/MXene composites in electrochemical energy storage but also lays a theoretical foundation for the development of high-efficiency supercapacitors.

Graphical abstract

This study utilizes metal-organic framework (MOF) and MXene composites to address energy storage challenges. A one-dimensional Ni-MOF is grown in situ between MXene layers, resulting in a specific capacitance of 960 F g⁻¹ at 0.5 A g⁻¹. A Ni-MOF/MXene//AC device was also created, with an operating voltage of 1.6 V, an energy density of 26.1 Wh kg⁻¹, and a power density of 8000 W kg⁻¹. The device retained 92.4% of its capacity after 5000 cycles, demonstrating excellent performance.