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<p>Two-dimensional (2D) molybdenum disulfide (MoS<sub>2</sub>) has emerged as a promising material for supercapacitors, attributed to its high specific surface area and exceptional reactivity. However, the absence of large-scale, efficient methods for producing MoS<sub>2</sub> nanosheets has significantly impeded their practical application. Herein, we report a novel solid-state shear pan-milling (S<sup>3</sup>M) method, distinct from traditional ball milling, for the large-scale preparation of MoS<sub>2</sub> nanosheets. Compared to bulk MoS<sub>2</sub>, exfoliated MoS<sub>2</sub> nanosheets significantly enhance supercapacitor performance, increasing the specific capacitance from 120 to 222.2&#xa0;Fg<sup>−1</sup> at 1&#xa0;A/g. At a current density of 2 A/g, the capacitance retention of 90% and the high Coulomb efficiency of 95.2% are maintained after 10,000 cycles. Additionally, H/90/AC asymmetric supercapacitors achieve an energy density of 12.23&#xa0;Wh/kg at a power density of 591.74&#xa0;W/kg. These findings demonstrate that S<sup>3</sup>M method offers a novel, environmentally friendly, and simple approach for exfoliating MoS<sub>2</sub> electrode materials with excellent performance.</p>

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Molybdenum disulfide nanosheets and evaluation of their supercapacitor performance via solid-state shear pan-milling method

  • 期刊论文

  • 发表日期：

    2025年3月4日

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  • Yichen Zhang,
  • Kanshe Li,
  • Yiming Li

摘要

Two-dimensional (2D) molybdenum disulfide (MoS2) has emerged as a promising material for supercapacitors, attributed to its high specific surface area and exceptional reactivity. However, the absence of large-scale, efficient methods for producing MoS2 nanosheets has significantly impeded their practical application. Herein, we report a novel solid-state shear pan-milling (S3M) method, distinct from traditional ball milling, for the large-scale preparation of MoS2 nanosheets. Compared to bulk MoS2, exfoliated MoS2 nanosheets significantly enhance supercapacitor performance, increasing the specific capacitance from 120 to 222.2 Fg−1 at 1 A/g. At a current density of 2 A/g, the capacitance retention of 90% and the high Coulomb efficiency of 95.2% are maintained after 10,000 cycles. Additionally, H/90/AC asymmetric supercapacitors achieve an energy density of 12.23 Wh/kg at a power density of 591.74 W/kg. These findings demonstrate that S3M method offers a novel, environmentally friendly, and simple approach for exfoliating MoS2 electrode materials with excellent performance.