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首页> 外文期刊>Chemistry: A European journal >Improved Lithium-Ion and Sodium-Ion Storage Properties from Few-Layered WS_2 Nanosheets Embedded in a Mesoporous CMK-3 Matrix
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Improved Lithium-Ion and Sodium-Ion Storage Properties from Few-Layered WS_2 Nanosheets Embedded in a Mesoporous CMK-3 Matrix

机译：改进的锂离子和钠离子储存性能从嵌入介孔CMK-3基质中的少数层WS_2纳米片中

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摘要

An integrated WS_2@CMK-3 nanocomposite has been prepared by a one-step hydrothermal method and then used as the anode material for lithium-ion and sodiumion batteries. Ultrathin WS_2 nanosheets have been successfully embedded into the ordered mesoporous carbon (CMK- 3) framework. Owing to the few-layered nanostructure of WS_2, as well as the high electronic conductivity and the volume confinement effect of CMK-3, the material shows larger discharge capacity, better rate capability, and improved cycle stability than pristine WS_2. When tested in lithium- ion batteries, the material delivers a reversible capacity of 720 mAhg~(-1) after 100 cycles at a current density of 100 mAg~(-1). A large discharge capacity of 307 mAhg~(-1) is obtained at a current density of 2 Ag~(-1). When used in sodiumion batteries, the material exhibits a capacity of 333 mAhg~(-1) at 100 mAg~(-1) without capacity fading after 70 cycles. A discharge capacity of 230 mAhg~(-1) is obtained at 2 Ag~(-1). This excellent performance demonstrates that the WS_2@CMK-3 nanocomposite has great potential as a high-performance anode material for next-generation rechargeable batteries.
机译：通过一步水热法制备了一体化的WS_2 @ CMK-3纳米复合材料，然后用作锂离子和钠电池的阳极材料。超薄WS_2纳米片已成功嵌入到有序的中孔碳（CMK-3）框架中。由于WS_2的少数纳米结构以及CMK-3的高电子电导率和体积限制效果，该材料显示出较大的放电容量，更好的速率能力和改善的循环稳定性而不是原始WS_2。当在锂离子电池中测试时，在100mAg〜（-1）的电流密度为100次循环后，该材料在100次循环后，该材料可提供可逆容量为720mAhg〜（-1）。在电流密度为2Ag〜（-1）的情况下获得307mAhg〜（-1）的大放电容量。当在钠电池中使用时，该材料在100mAG〜（-1）下表现出333mAhg〜（-1）的容量，而70次循环后容量衰落。在2Ag〜（-1）中获得230mAhg〜（-1）的放电容量。这种优异的性能表明，WS_2 @ CMK-3纳米复合材料具有很大的潜力，作为下一代可充电电池的高性能阳极材料。

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  • 来源
    《Chemistry: A European journal》 |2017年第29期|共7页
  • 作者

    Qiang Pang; Yu Gao; Yingying Zhao; Yanming Ju; Hailong Qiu; Yingjin Wei; Bingbing Liu; Bo Zou; Fei Du; Gang Chen;

  • 作者单位

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P. R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P. R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P. R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P. R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P. R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P. R. China);

    State Key Laboratory of Superhard Materials College of Physics Jilin University Changchun 130012 (P. R. China);

    State Key Laboratory of Superhard Materials College of Physics Jilin University Changchun 130012 (P. R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P. R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P. R. China);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用化学;
  • 关键词

    CMK-3; batteries; lithium; nanostructures; sodium; tungsten disulfide;

    机译：CMK-3;电池;锂;纳米结构;钠;钨二硫化物;

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