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<p>A novel hierarchical NiCo<sub>2</sub>O<sub>4</sub>/MoS<sub>2</sub>@rGO composite was synthesized to improve the electrochemical properties of supercapacitors. The nanocomposite combines the enhance capacity of NiCo<sub>2</sub>O<sub>4</sub>, the excellent ion storage capability of MoS<sub>2</sub>, and the conductive support of rGO, addressing challenges related to energy density, cycle life performance. The NiCo<sub>2</sub>O<sub>4</sub>/MoS<sub>2</sub>@rGO nanocomposite exhibits an impressive specific capacitance of 1696&#xa0;F g<sup>−1</sup> at 1&#xa0;A g<sup>−1</sup>, and the resulting asymmetric supercapacitor (NiCo<sub>2</sub>O<sub>4</sub>/MoS<sub>2</sub>@rGO//AC) demonstrates an increased energy density of 56.45 Wh kg<sup>−1</sup> and a power density of 750&#xa0;W kg<sup>−1</sup>. Moreover, the composite retains 95.2% of its initial capacitance over 10,000 cycles at 1&#xa0;A g<sup>−1</sup>, showing exceptional cycling performance. These improvements are due to the synergistic interaction of NiCo<sub>2</sub>O<sub>4</sub>, MoS<sub>2</sub>, and rGO, where MoS<sub>2</sub> serves as an effective ion buffer, enhancing ion diffusion and transport, while rGO improves conductivity and structural stability. The NiCo<sub>2</sub>O<sub>4</sub>/MoS<sub>2</sub>@rGO composite exhibits great promise for advanced asymmetric supercapacitor applications, offering large energy capacity, rapid charge/discharge performance, and exceptional longevity.</p>

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Hydrothermally Synthesized rGO-Coated NiCo2O4/MoS2 Cubes as High-Performance Positive Electrode for Asymmetric Supercapacitors

  • 期刊论文

  • 发表日期：

    2025年3月20日

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  • K. Manimegala,
  • S. Stella Mary,
  • Mohd Shkir,
  • Nasir A. Siddiqui,
  • Aslam Khan,
  • M. Saravanakumar,
  • M. Sakthivel

摘要

A novel hierarchical NiCo2O4/MoS2@rGO composite was synthesized to improve the electrochemical properties of supercapacitors. The nanocomposite combines the enhance capacity of NiCo2O4, the excellent ion storage capability of MoS2, and the conductive support of rGO, addressing challenges related to energy density, cycle life performance. The NiCo2O4/MoS2@rGO nanocomposite exhibits an impressive specific capacitance of 1696 F g−1 at 1 A g−1, and the resulting asymmetric supercapacitor (NiCo2O4/MoS2@rGO//AC) demonstrates an increased energy density of 56.45 Wh kg−1 and a power density of 750 W kg−1. Moreover, the composite retains 95.2% of its initial capacitance over 10,000 cycles at 1 A g−1, showing exceptional cycling performance. These improvements are due to the synergistic interaction of NiCo2O4, MoS2, and rGO, where MoS2 serves as an effective ion buffer, enhancing ion diffusion and transport, while rGO improves conductivity and structural stability. The NiCo2O4/MoS2@rGO composite exhibits great promise for advanced asymmetric supercapacitor applications, offering large energy capacity, rapid charge/discharge performance, and exceptional longevity.