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<p>Metallic, two-dimensional molybdenum disulfide (MoS<sub>2</sub>) nanosheets show promise for energy storage and catalysis applications. However, current chemical exfoliation methods require more than 48 h to produce milligrams of material, and result in an impure mixture of metallic (1T/1T′, approximately 50%–70%) and semiconducting (2H) phases. Here we demonstrate large-scale and rapid (&gt;600 g h<sup>−1</sup>) production of nearly pure-phase metallic two-dimensional MoS<sub>2</sub> nanosheets using microwave irradiation. Atomic-resolution imaging and X-ray photoelectron spectroscopy show nearly 100% metallic phase in the basal plane. This high purity leads to a large exchange current density (0.175 ± 0.030 mA cm<sup>−2</sup>) and low Tafel slopes (39–47 mV dec<sup>−1</sup>) for hydrogen evolution reaction. In supercapacitors and lithium–sulfur pouch-cell batteries, the resulting nanosheets enable a high volumetric capacitance of 753.0 ± 3.6 F cm<sup>−3</sup> and a specific capacity of 1,245 ± 16 mAh g<sup>−1</sup> (electrolyte-to-sulfur ratio, 2 µl mg<sup>−1</sup>), respectively. Our method provides a practical pathway for producing high-quality metallic two-dimensional materials for high-performance energy devices.</p>

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Scalable manufacture of nearly pure-phase metallic MoS2 nanosheets

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月29日

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  • Ziwei Jeffrey Yang,
  • Zhuangnan Li,
  • Leyi Loh,
  • James Moloney,
  • John Walmsley,
  • Jiahang Li,
  • Yuan Chen,
  • Lixin Liu,
  • Han Zang,
  • Han Yan,
  • Soumya Sarkar,
  • Jason Day,
  • Yan Wang,
  • Manish Chhowalla

摘要

Metallic, two-dimensional molybdenum disulfide (MoS2) nanosheets show promise for energy storage and catalysis applications. However, current chemical exfoliation methods require more than 48 h to produce milligrams of material, and result in an impure mixture of metallic (1T/1T′, approximately 50%–70%) and semiconducting (2H) phases. Here we demonstrate large-scale and rapid (>600 g h−1) production of nearly pure-phase metallic two-dimensional MoS2 nanosheets using microwave irradiation. Atomic-resolution imaging and X-ray photoelectron spectroscopy show nearly 100% metallic phase in the basal plane. This high purity leads to a large exchange current density (0.175 ± 0.030 mA cm−2) and low Tafel slopes (39–47 mV dec−1) for hydrogen evolution reaction. In supercapacitors and lithium–sulfur pouch-cell batteries, the resulting nanosheets enable a high volumetric capacitance of 753.0 ± 3.6 F cm−3 and a specific capacity of 1,245 ± 16 mAh g−1 (electrolyte-to-sulfur ratio, 2 µl mg−1), respectively. Our method provides a practical pathway for producing high-quality metallic two-dimensional materials for high-performance energy devices.