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<p>This study presents the synthesis of a hierarchical flower-like ZnCo<sub>2</sub>O<sub>4</sub>/MoS<sub>2</sub> nanocomposite integrated with reduced graphene oxide (rGO) nanosheets using a simple hydrothermal method. The structural, morphological, and compositional properties of the material are systematically analysed. Electrochemical characterization in a three-electrode configuration with 1.0&#xa0;M KOH demonstrates that ZnCo<sub>2</sub>O<sub>4</sub>/MoS<sub>2</sub>@rGO achieves a high specific capacitance of 1764&#xa0;F/g at 1&#xa0;A/g, with excellent cycling stability, retaining 97% of its capacitance after 10,000 cycles. When assembled into an asymmetric supercapacitor (ZnCo<sub>2</sub>O<sub>4</sub>/MoS<sub>2</sub>@rGO//AC), the device delivers a maximum energy density of 45.27 Wh/kg at a power density of 3326&#xa0;W/kg, while maintaining 96% capacitance retention over 10,000 cycles. The enhanced electrochemical performance is attributed to the synergistic effects of ZnCo<sub>2</sub>O<sub>4</sub>, MoS<sub>2</sub> and rGO, which collectively improve charge transport and electrochemical activity. These results highlight the potential of ZnCo<sub>2</sub>O<sub>4</sub>/MoS<sub>2</sub>@rGO as a high-performance electrode material for next-generation supercapacitors.</p>

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Porous rGO nanosheet-enhanced ZnCo2O4/MoS2 flower-like structures for high-efficiency positive electrodes in asymmetric supercapacitor applications

  • 期刊论文

  • 发表日期：

    2025年4月29日

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  • K. Manimegala,
  • S. Stella Mary,
  • M. Aslam Manthrammel,
  • Mohd Shkir,
  • Thangabalu Subramani,
  • M. Sakthivel

摘要

This study presents the synthesis of a hierarchical flower-like ZnCo2O4/MoS2 nanocomposite integrated with reduced graphene oxide (rGO) nanosheets using a simple hydrothermal method. The structural, morphological, and compositional properties of the material are systematically analysed. Electrochemical characterization in a three-electrode configuration with 1.0 M KOH demonstrates that ZnCo2O4/MoS2@rGO achieves a high specific capacitance of 1764 F/g at 1 A/g, with excellent cycling stability, retaining 97% of its capacitance after 10,000 cycles. When assembled into an asymmetric supercapacitor (ZnCo2O4/MoS2@rGO//AC), the device delivers a maximum energy density of 45.27 Wh/kg at a power density of 3326 W/kg, while maintaining 96% capacitance retention over 10,000 cycles. The enhanced electrochemical performance is attributed to the synergistic effects of ZnCo2O4, MoS2 and rGO, which collectively improve charge transport and electrochemical activity. These results highlight the potential of ZnCo2O4/MoS2@rGO as a high-performance electrode material for next-generation supercapacitors.