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<p>Molybdenum disulfide (MoS<sub>2</sub>), a metal sulfide with a high theoretical capacity, is considered a potential alternative to traditional graphite anodes in lithium-ion batteries (LIBs). However, MoS<sub>2</sub> is prone to agglomeration during the lithiation/delithiation process and has poor electrical conductivity, which limits its application. Herein, a composite of two-dimensional (2D) MoS<sub>2</sub> nanosheets and three-dimensional (3D) Cu<sub>7.2</sub>S<sub>4</sub> cubes was prepared by a self-sacrificing template method to alleviate the inherent defects of MoS<sub>2</sub>. The 3D Cu<sub>7.2</sub>S<sub>4</sub> alleviates the agglomeration problem of MoS<sub>2</sub> nanosheets, while the surface-covered carbon layer increases the structural stability of the material, collectively resulting in excellent electrochemical properties. As expected, when used as anode active material, the Cu<sub>7.2</sub>S<sub>4</sub>@C@MoS<sub>2</sub> composite demonstrates excellent specific capacity of 1813.3&#xa0;mA&#xa0;h&#xa0;g<sup>−1</sup> at 0.1 A g<sup>−1</sup> and shows superior cycling stability (702.4&#xa0;mA&#xa0;h&#xa0;g<sup>−1</sup> after 1000 cycles at 1 A g<sup>−1</sup>), which is attributed to the unique structure combining 2D and 3D as well as the synergistic effect between different components. The study offers a novel approach for the expanded use of MoS<sub>2</sub>.</p>

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A hierarchical Cu7.2S4@C@MoS2 composite with superior lithium-ion storage properties

  • 期刊论文

  • 发表日期：

    2025年4月2日

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  • Ziqiushui Zhuang,
  • Huizhong Xu,
  • Qianqian Wu,
  • Xiaochen Liu,
  • Enwang Ma,
  • Yufeng Zhu,
  • Minghui Zhao,
  • Wei Li

摘要

Molybdenum disulfide (MoS2), a metal sulfide with a high theoretical capacity, is considered a potential alternative to traditional graphite anodes in lithium-ion batteries (LIBs). However, MoS2 is prone to agglomeration during the lithiation/delithiation process and has poor electrical conductivity, which limits its application. Herein, a composite of two-dimensional (2D) MoS2 nanosheets and three-dimensional (3D) Cu7.2S4 cubes was prepared by a self-sacrificing template method to alleviate the inherent defects of MoS2. The 3D Cu7.2S4 alleviates the agglomeration problem of MoS2 nanosheets, while the surface-covered carbon layer increases the structural stability of the material, collectively resulting in excellent electrochemical properties. As expected, when used as anode active material, the Cu7.2S4@C@MoS2 composite demonstrates excellent specific capacity of 1813.3 mA h g−1 at 0.1 A g−1 and shows superior cycling stability (702.4 mA h g−1 after 1000 cycles at 1 A g−1), which is attributed to the unique structure combining 2D and 3D as well as the synergistic effect between different components. The study offers a novel approach for the expanded use of MoS2.