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<p>In this work, Mo-doped CuS (Mo@CuS) nanospheres and microspheres were synthesized directly on nickel foam (NF) using a binder-free solvothermal method. Its electrochemical performance to be a supercapacitor cathode was also investigated. In three-electrode system, it boasts an outstanding specific capacitance of 3504.2 F/g when the current density is 2 A/g. Moreover, it maintains 74.8% stability even after 5000 charge–discharge cycles at 10 A/g. To put its practicality to the test, an asymmetric supercapacitor was put together. In this device, Mo@CuS/NF served as the cathode, while biomass—derived activated carbon was used as the anode. The assembled device showed a specific capacitance of 126.4 F/g. It could achieve an energy density of 44.8 Wh/kg when the power density was 800 W/kg. After 10,000 cycles at 5 A/g, it still retained 77.2% of its initial performance. It indicates that Mo@CuS/NF material is a valuable cathode material for supercapacitor applications.</p>

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Enhanced electrochemical performance of molybdenum-doped CuS for asymmetric supercapacitors

  • 期刊论文

  • 发表日期：

    2025年5月21日

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  • Weiguo Zhang,
  • Jiahao Dai,
  • Hongzhi Wang,
  • Suwei Yao

摘要

In this work, Mo-doped CuS (Mo@CuS) nanospheres and microspheres were synthesized directly on nickel foam (NF) using a binder-free solvothermal method. Its electrochemical performance to be a supercapacitor cathode was also investigated. In three-electrode system, it boasts an outstanding specific capacitance of 3504.2 F/g when the current density is 2 A/g. Moreover, it maintains 74.8% stability even after 5000 charge–discharge cycles at 10 A/g. To put its practicality to the test, an asymmetric supercapacitor was put together. In this device, Mo@CuS/NF served as the cathode, while biomass—derived activated carbon was used as the anode. The assembled device showed a specific capacitance of 126.4 F/g. It could achieve an energy density of 44.8 Wh/kg when the power density was 800 W/kg. After 10,000 cycles at 5 A/g, it still retained 77.2% of its initial performance. It indicates that Mo@CuS/NF material is a valuable cathode material for supercapacitor applications.