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<p>The g-C<sub>3</sub>N<sub>4</sub>-incorporated MnO<sub>2</sub>/MoS<sub>2</sub> nanocomposite was successfully fabricated via a two-step hydrothermal approach. Structural and morphological analyses confirmed the uniform dispersion of g-C<sub>3</sub>N<sub>4</sub> within the MnO<sub>2</sub>/MoS<sub>2</sub> matrix, forming a porous interconnected framework that facilitates ion transport. Electrochemical analysis indicates improved charge transfer behaviour, suggesting enhanced electron transport within the composite. Electrochemical investigation in 1&#xa0;M KOH shows that the MnO<sub>2</sub>/MoS<sub>2</sub>@g-C<sub>3</sub>N<sub>4</sub> electrode delivers a high specific capacitance of 1535&#xa0;F g⁻<sup>1</sup> at 1 A g⁻<sup>1</sup>, outperforming the pristine MnO<sub>2</sub>/MoS<sub>2</sub> electrode. The assembled asymmetric supercapacitor (MnO<sub>2</sub>/MoS<sub>2</sub>@g-C<sub>3</sub>N<sub>4</sub>//AC) exhibits an energy density of 60.6 Wh kg⁻<sup>1</sup> at a power density of 800&#xa0;W kg⁻<sup>1</sup>, along with 94.3% capacitance retention over 10,000 cycles. These results demonstrate that the synergistic integration of MnO<sub>2</sub>, MoS<sub>2</sub> and g-C<sub>3</sub>N<sub>4</sub> enhances electrical conductivity, structural stability, and redox activity, making the composite a promising electrode material for advanced energy storage applications.</p>

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g-C3N4-integrated MnO2/MoS2 nanocomposite as a high-energy-density electrode for asymmetric supercapacitors

  • 期刊论文

  • 发表日期：

    2026年5月8日

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  • A. Siveshwari Bhasker,
  • N. Vijayakumar,
  • Muhammadu Sathik Raja,
  • Kumaravelan Radhakrishnan

摘要

The g-C3N4-incorporated MnO2/MoS2 nanocomposite was successfully fabricated via a two-step hydrothermal approach. Structural and morphological analyses confirmed the uniform dispersion of g-C3N4 within the MnO2/MoS2 matrix, forming a porous interconnected framework that facilitates ion transport. Electrochemical analysis indicates improved charge transfer behaviour, suggesting enhanced electron transport within the composite. Electrochemical investigation in 1 M KOH shows that the MnO2/MoS2@g-C3N4 electrode delivers a high specific capacitance of 1535 F g⁻1 at 1 A g⁻1, outperforming the pristine MnO2/MoS2 electrode. The assembled asymmetric supercapacitor (MnO2/MoS2@g-C3N4//AC) exhibits an energy density of 60.6 Wh kg⁻1 at a power density of 800 W kg⁻1, along with 94.3% capacitance retention over 10,000 cycles. These results demonstrate that the synergistic integration of MnO2, MoS2 and g-C3N4 enhances electrical conductivity, structural stability, and redox activity, making the composite a promising electrode material for advanced energy storage applications.