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<p>The enhancing need for efficient energy storage and conversion devices demonstrates the crucial need for electrode materials with dual excellence. Conversely, attaining simultaneous optimization of supercapcitor performance and hydrogen evolution reaction (HER) activity remains a challenge due to limitations of material. This study reported the synthesis of pure nickel sulfide (Ni<sub>3</sub>S<sub>2</sub>) and (3% and 5%) cerium-doped nickel sulfide (Ce<sub>2</sub>S<sub>3</sub>-doped Ni<sub>3</sub>S<sub>2</sub>) nanomaterials with micro-emulsion-mediated hydrothermal approach for dual-excellence in supercapcitor and hydrogen evolution reactions (HER). The synthesized materials were characterized via UV-Vis spectroscopy, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM). The SEM analysis illustrated aggregated globular morphology of the prepared nanomaterials. The electrochemical performance confirmed exceptional pseudocapacitive behaviour and remarkable cyclic stability of the prepared Ce-doped Ni<sub>3</sub>S<sub>2</sub> materials. Cyclic voltammetry (CV) analysis displayed symmetrical behaviour, sustaining 89% stability at 3000th cycles. Similarly, galvanostatic charge-discharge (GCD) at performed at 1&#xa0;A/g exposed capacitance values of 890&#xa0;F/g, 978&#xa0;F/g and 1106&#xa0;F/g for pure Ni<sub>3</sub>S<sub>2</sub>, 5% Ce<sub>2</sub>S<sub>3</sub>-Ni<sub>3</sub>S<sub>2</sub> and 3% Ce<sub>2</sub>S<sub>3</sub>-Ni<sub>3</sub>S<sub>2</sub>. Additionally, energy densities were also determined about 31.15 Wh/kg, 38.71 Wh/kg, and 34.23 Wh/kg, for pure Ni<sub>3</sub>S<sub>2</sub>, 3% Ce-doped Ni<sub>3</sub>S<sub>2</sub> and 5% Ce-doped Ni<sub>3</sub>S<sub>2</sub> respectively. Interestingly, the 3% Ce-doped Ni<sub>3</sub>S<sub>2</sub> demonstrated superior cyclic stability (92% after 3000th cycles) and significant performance, illustrating its potential as a high-performance energy storage device. Moreover, the ideal concentration of cerium dopant was determined to be 3% in Ni<sub>3</sub>S<sub>2</sub> in HER study, exhibited an onset potential of 0.14&#xa0;V, an over potential of 71 mV at a current density of 10 mAcm<sup>− 2</sup>, and a Tafel slope of 57 mVdec<sup>− 1</sup> in 2.0&#xa0;M KOH, demonstrating the highest activity.</p> Graphical Abstract <p></p>

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Design the Synergy of Rare Earth Metal Based Ce2S3@Ni3S2 Hybrid Electrode Materials for Hydrogen Evolution and Supercapacitor Application: Dual Excellence

  • 期刊论文

  • 发表日期：

    2025年3月6日

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  • Zeshan Ali Sandhu,
  • Muhammad Danish,
  • Umme Farwa,
  • Muhammad Asam Raza,
  • Ali Haider Bhalli,
  • Aeysha Sultan,
  • Norah Alwadai,
  • Wissem Mnif

摘要

The enhancing need for efficient energy storage and conversion devices demonstrates the crucial need for electrode materials with dual excellence. Conversely, attaining simultaneous optimization of supercapcitor performance and hydrogen evolution reaction (HER) activity remains a challenge due to limitations of material. This study reported the synthesis of pure nickel sulfide (Ni3S2) and (3% and 5%) cerium-doped nickel sulfide (Ce2S3-doped Ni3S2) nanomaterials with micro-emulsion-mediated hydrothermal approach for dual-excellence in supercapcitor and hydrogen evolution reactions (HER). The synthesized materials were characterized via UV-Vis spectroscopy, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM). The SEM analysis illustrated aggregated globular morphology of the prepared nanomaterials. The electrochemical performance confirmed exceptional pseudocapacitive behaviour and remarkable cyclic stability of the prepared Ce-doped Ni3S2 materials. Cyclic voltammetry (CV) analysis displayed symmetrical behaviour, sustaining 89% stability at 3000th cycles. Similarly, galvanostatic charge-discharge (GCD) at performed at 1 A/g exposed capacitance values of 890 F/g, 978 F/g and 1106 F/g for pure Ni3S2, 5% Ce2S3-Ni3S2 and 3% Ce2S3-Ni3S2. Additionally, energy densities were also determined about 31.15 Wh/kg, 38.71 Wh/kg, and 34.23 Wh/kg, for pure Ni3S2, 3% Ce-doped Ni3S2 and 5% Ce-doped Ni3S2 respectively. Interestingly, the 3% Ce-doped Ni3S2 demonstrated superior cyclic stability (92% after 3000th cycles) and significant performance, illustrating its potential as a high-performance energy storage device. Moreover, the ideal concentration of cerium dopant was determined to be 3% in Ni3S2 in HER study, exhibited an onset potential of 0.14 V, an over potential of 71 mV at a current density of 10 mAcm− 2, and a Tafel slope of 57 mVdec− 1 in 2.0 M KOH, demonstrating the highest activity.

Graphical Abstract