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<p>Transition metal chalcogenides (TMCs) are promising electrode materials for supercapacitors because of their improved reversibility, cost-effectiveness, stability, and ability to display diverse oxidation states. Here, we report the synthesis of a composite material, ZnS@CNT, composed of zinc sulfide (ZnS) nanoparticles embedded within carbon nanotubes (CNTs), via one-pot hydrothermal synthesis followed by calcination. The fabricated asymmetric supercapacitor device (ZnS@CNT//AC ASC) delivered a capacitance of 213.9&#xa0;F&#xa0;g<sup>−1</sup>, with specific energy and power of 43.3&#xa0;Wh&#xa0;kg<sup>−1</sup> and 6.8&#xa0;kW&#xa0;kg<sup>−1</sup>, respectively, by using 2&#xa0;M KOH as the electrolyte. After 5,000 operational cycles, the device maintained a remarkable capacity retention of 91.79%, highlighting the potential of ZnS@CNT-based ASC devices for future supercapacitor technology.</p>

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Self-assembled ZnS@CNT composite nanoparticles for advanced supercapacitor electrode

  • 期刊论文

  • 发表日期：

    2025年1月6日

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  • A. Tamilselvan,
  • Shilpi Sengupta,
  • Atin Pramanik,
  • Pulickel M. Ajayan,
  • Manab Kundu

摘要

Transition metal chalcogenides (TMCs) are promising electrode materials for supercapacitors because of their improved reversibility, cost-effectiveness, stability, and ability to display diverse oxidation states. Here, we report the synthesis of a composite material, ZnS@CNT, composed of zinc sulfide (ZnS) nanoparticles embedded within carbon nanotubes (CNTs), via one-pot hydrothermal synthesis followed by calcination. The fabricated asymmetric supercapacitor device (ZnS@CNT//AC ASC) delivered a capacitance of 213.9 F g−1, with specific energy and power of 43.3 Wh kg−1 and 6.8 kW kg−1, respectively, by using 2 M KOH as the electrolyte. After 5,000 operational cycles, the device maintained a remarkable capacity retention of 91.79%, highlighting the potential of ZnS@CNT-based ASC devices for future supercapacitor technology.