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首页> 外文期刊>Advanced energy materials >Carbon-Sheathed MoS2 Nanothorns Epitaxially Grown on CNTs: Electrochemical Application for Highly Stable and Ultrafast Lithium Storage
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Carbon-Sheathed MoS2 Nanothorns Epitaxially Grown on CNTs: Electrochemical Application for Highly Stable and Ultrafast Lithium Storage

机译：在碳纳米管上外延生长的带碳护套的MoS2纳米刺：高度稳定和超快锂存储的电化学应用

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摘要

Molybdenum disulfide (MoS2), which possesses a layered structure and exhibits a high theoretical capacity, is currently under intensive research as an anode candidate for next generation of Li-ion batteries. However, unmodified MoS2 suffers from a poor cycling stability and an inferior rate capability upon charge/discharge processes. Herein, a unique nanocomposite comprising MoS2 nanothorns epitaxially grown on the backbone of carbon nanotubes (CNTs) and coated by a layer of amorphous carbon is synthesized via a simple method. The epitaxial growth of MoS2 on CNTs results in a strong chemical coupling between active nanothorns and carbon substrate via CS bond, providing a high stability as well as a high-efficiency electron-conduction/ion-transportation system on cycling. The outer carbon layer can well-accommodate the structural strain in the electrode upon lithium-ion insertion/extraction. When employed as an anode for lithium storage, the prepared material exhibits remarkable electrochemical properties with a high specific capacity of 982 mA h g(-1) at 0.1 A g(-1), as well as excellent long-cycling stability (905 mA h g(-1) at 1 A g(-1) after 500 cycles) and superior rate capability, confirming its potential application in high-performance Li-ion batteries.
机译：具有层状结构并具有高理论容量的二硫化钼（MoS2）目前正作为下一代锂离子电池的负极候选材料而受到广泛研究。但是，未改性的MoS2的循环稳定性差，并且在充电/放电过程中的速率能力较差。在此，通过简单的方法合成了独特的纳米复合材料，该复合材料包括外延生长在碳纳米管（CNT）的骨架上并被无定形碳层覆盖的MoS 2纳米刺。 MoS2在CNT上的外延生长导致活性纳米刺和碳底物之间通过CS键形成强化学偶联，从而在循环时提供了高稳定性和高效的电子传导/离子传输系统。当锂离子插入/提取时，外碳层可以很好地适应电极中的结构应变。当用作锂存储阳极时，制得的材料具有出色的电化学性能，在0.1 A g（-1）时具有982 mA hg（-1）的高比容量，以及出色的长循环稳定性（905 mA hg） （-1）经过500次循环后在1 A g（-1）时具有极高的倍率能力，证实了其在高性能锂离子电池中的潜在应用。

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  • 来源
    《Advanced energy materials》 |2018年第7期|1700174.1-1700174.11|共11页
  • 作者

    Zhang Zijia; Zhao Hailei; Teng Yongqiang; Chang Xiwang; Xia Qing; Li Zhaolin; Fang Jiejun; Du Zhihong; Swierczek Konrad;

  • 作者单位

    Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China|Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China;

    Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China;

    AGH Univ Sci & Technol, Fac Energy & Fuels, Dept Hydrogen Energy, Al A Mickiewicza 30, PL-30059 Krakow, Poland|AGH Univ Sci & Technol, AGH Ctr Energy, Ul Czarnowiejska 36, PL-30054 Krakow, Poland;

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  • 正文语种 eng
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  • 关键词

    amorphous carbon layer; carbon nanotubes; epitaxial growth; lithium-ion batteries; molybdenum disulfide;

    机译：非晶碳层;碳纳米管;外延生长;锂离子电池;二硫化钼;

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