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<p>Adequate energy storage and transformation are crucial for supporting a stable society. Supercapattery devices offer a viable approach to bridging the gap between conventional batteries and supercapacitors (SCs). Metal-organic frameworks (MOFs) are durable networks with interconnected pores formed by metal ions and organic linkers. MXenes are 2-D transition metal carbides or nitrides with high conductivity and reactivity. This study explores the synergy of MOFs, MXenes, and graphene quantum dots (GQDs) doping as advanced electrode materials. In a three-electrode design, the ZIF-90/Nb<sub>2</sub>C@GQD electrode recorded 1391&#xa0;C g<sup>−1</sup> in specific capacity when tested at 1&#xa0;A g<sup>−1</sup>. A supercapattery device (ZIF-90/Nb<sub>2</sub>C@GQD//AC) was fabricated using ZIF-90/Nb<sub>2</sub>C@GQD as the anode (positive electrode) and activated carbon (AC) as the cathode (negative electrode). The device sustained an energy density of 70 Wh kg<sup>−1</sup> at a power output of 900&#xa0;W kg<sup>−1</sup> and preserved 83.7% of its capacity after 12,000 charge–discharge cycles. The extracted <i>b</i>-values (0.54–0.70) from power-law analysis confirm the hybrid nature of the charge-storage process. The ZIF-90/Nb<sub>2</sub>C@GQD composite showed strong hydrogen evolution reaction (HER) performance, with a low Tafel slope of 45.72 mV dec<sup>−1</sup>. The slight Tafel slope demonstrates the rapid kinetics of the electrocatalytic process. The ZIF-90/Nb<sub>2</sub>C@GQD composites demonstrate strong potential for advanced energy storage systems and catalytic energy conversion.</p>

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“Next-Generation ZIF-90/Nb2C@GQD nanohybrids for integrated energy storage and hydrogen evolution”

  • 期刊论文

  • 发表日期：

    2025年10月28日

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  • Hasan B. Albargi,
  • Muhammad Zeeshan,
  • Mohammed E. Abaker,
  • M. W Iqbal,
  • Muhammad Arslan,
  • Abhinav Kumar,
  • Nermin A.,
  • Heba A. El-Sabban,
  • M. A. Diab

摘要

Adequate energy storage and transformation are crucial for supporting a stable society. Supercapattery devices offer a viable approach to bridging the gap between conventional batteries and supercapacitors (SCs). Metal-organic frameworks (MOFs) are durable networks with interconnected pores formed by metal ions and organic linkers. MXenes are 2-D transition metal carbides or nitrides with high conductivity and reactivity. This study explores the synergy of MOFs, MXenes, and graphene quantum dots (GQDs) doping as advanced electrode materials. In a three-electrode design, the ZIF-90/Nb2C@GQD electrode recorded 1391 C g−1 in specific capacity when tested at 1 A g−1. A supercapattery device (ZIF-90/Nb2C@GQD//AC) was fabricated using ZIF-90/Nb2C@GQD as the anode (positive electrode) and activated carbon (AC) as the cathode (negative electrode). The device sustained an energy density of 70 Wh kg−1 at a power output of 900 W kg−1 and preserved 83.7% of its capacity after 12,000 charge–discharge cycles. The extracted b-values (0.54–0.70) from power-law analysis confirm the hybrid nature of the charge-storage process. The ZIF-90/Nb2C@GQD composite showed strong hydrogen evolution reaction (HER) performance, with a low Tafel slope of 45.72 mV dec−1. The slight Tafel slope demonstrates the rapid kinetics of the electrocatalytic process. The ZIF-90/Nb2C@GQD composites demonstrate strong potential for advanced energy storage systems and catalytic energy conversion.