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<p>In response to the increasing demand for high‐performance supercapacitor and hydrogen production electrode materials, this article focuses on synthesis and electrochemical testing of WS<sub>2</sub> nanosheets, Mo<sub>2</sub>C (MXene), and WS₂/MXene nanocomposites as hybrids. Carbon nanotubes (CNTs) are being of great interest in the energy storage application area as a result of their outstanding capacity for storage, sensitivity, and conductivity. 3 wt.% of CNT was added to the composite, resulting in the CNT@WS₂/MXene hybrid structure. The aim is to design next-generation materials with enhanced energy storage properties. Toward this end, a comparative study was done on the nanocomposite and its individual building blocks. The synthesis of MXene, WS<sub>2</sub> nanosheets, and their nanocomposites was completed using a combination of chemical etching and hydrothermal techniques. In this work, abundant active sites were combined with high conductivity to rationally design a CNT@WS<sub>2</sub>/Mo<sub>2</sub>C hybrid architecture for enhanced energy storage and hydrogen evolution. Furthermore, through the combination of CNT@WS<sub>2</sub>/Mo<sub>2</sub>C and activated carbon, a hybrid supercapacitor is designed as CNT@WS<sub>2</sub>/Mo<sub>2</sub>C//AC. At 2 Ag<sup>−1</sup>, the hybrid device exhibited a Qs value of 410 C/g. In addition, the hybrid supercapacitor demonstrated a significantly higher energy density (75.9 Wh/kg) and power density (1000 W/kg) than the values that had been previously reported. The device’s stability is evaluated by measuring it for up to 12,000 charging/discharging cycles. The real device maintained 86.8% of its capacity retention and coulombic efficiency of 95.1%. In addition, the CNT@WS<sub>2</sub>/Mo<sub>2</sub>C material demonstrates a low overpotential of 98.7&#xa0;mV at −&#xa0;10&#xa0;mA/cm<sup>2</sup>, along with Tafel slope values of 77.62&#xa0;mV/dec for the HER, and it exhibits excellent cyclic stability. Our research establishes a novel foundation for the development of energy storage devices that are of the supercapacitor type and exhibit exceptional performance. The modification of CNT@WS<sub>2</sub>/Mo<sub>2</sub>C electrode presents novel opportunities for the development of high-performance energy storage devices and electrochemical water splitting.</p>

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Optimizing electrochemical properties of CNT@WS2/Mo2C hybrid nanomaterials for advanced supercapacitors and hydrogen production

  • 期刊论文

  • 发表日期：

    2025年12月14日

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  • N. M. A. Hadia,
  • Muhammad Arslan,
  • Heba A. El-Sabban,
  • M. A. Diab,
  • Mohammed Ezzeldien,
  • Meshal Alzaid,
  • M. F. Hasaneen,
  • W. S. Mohamed,
  • Abhinav Kumar,
  • Layla Shafei,
  • A. Nermin

摘要

In response to the increasing demand for high‐performance supercapacitor and hydrogen production electrode materials, this article focuses on synthesis and electrochemical testing of WS2 nanosheets, Mo2C (MXene), and WS₂/MXene nanocomposites as hybrids. Carbon nanotubes (CNTs) are being of great interest in the energy storage application area as a result of their outstanding capacity for storage, sensitivity, and conductivity. 3 wt.% of CNT was added to the composite, resulting in the CNT@WS₂/MXene hybrid structure. The aim is to design next-generation materials with enhanced energy storage properties. Toward this end, a comparative study was done on the nanocomposite and its individual building blocks. The synthesis of MXene, WS2 nanosheets, and their nanocomposites was completed using a combination of chemical etching and hydrothermal techniques. In this work, abundant active sites were combined with high conductivity to rationally design a CNT@WS2/Mo2C hybrid architecture for enhanced energy storage and hydrogen evolution. Furthermore, through the combination of CNT@WS2/Mo2C and activated carbon, a hybrid supercapacitor is designed as CNT@WS2/Mo2C//AC. At 2 Ag−1, the hybrid device exhibited a Qs value of 410 C/g. In addition, the hybrid supercapacitor demonstrated a significantly higher energy density (75.9 Wh/kg) and power density (1000 W/kg) than the values that had been previously reported. The device’s stability is evaluated by measuring it for up to 12,000 charging/discharging cycles. The real device maintained 86.8% of its capacity retention and coulombic efficiency of 95.1%. In addition, the CNT@WS2/Mo2C material demonstrates a low overpotential of 98.7 mV at − 10 mA/cm2, along with Tafel slope values of 77.62 mV/dec for the HER, and it exhibits excellent cyclic stability. Our research establishes a novel foundation for the development of energy storage devices that are of the supercapacitor type and exhibit exceptional performance. The modification of CNT@WS2/Mo2C electrode presents novel opportunities for the development of high-performance energy storage devices and electrochemical water splitting.