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首页> 外文期刊>Advanced energy materials >High Reversible Lithium Storage Capacity and Structural Changes of Fe_2O_3 Nanoparticles Confined inside Carbon Nanotubes
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High Reversible Lithium Storage Capacity and Structural Changes of Fe_2O_3 Nanoparticles Confined inside Carbon Nanotubes

机译：Fe_2O_3纳米粒子内狭窄在碳纳米管内的高可逆锂储存容量和结构变化

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摘要

The structural evolution of electrochemically prelithiated Fe2O3 nanoparticles confined in carbon nanotubes (CNTs) during lithium insertion/extraction is studied by in situ transmission electron microscopy. It is found that the aggregation and coarsening of Fe core-containing Li2O (Fe@Li2O) nanograins formed during the charge process are prevented by the spatial restriction of the CNTs. A high reversible capacity of 2071 mA h g(-1) for the encapsulated Fe2O3 nanoparticles in CNTs is demonstrated when the material is used as the anode of lithium ion batteries. This is the highest reversible capacity ever reported for an Fe2O3 electrode. The significantly improved lithium storage capacity of the Fe2O3 nanoparticles is attributed to the extra lithium storage due to the enhanced interfacial lithium storage and reversible reaction of LiOH to form LiH and solid-electrolyte-interphase conversion originating from the nanoconfinement of CNTs as well as the very small particle size of the Fe@Li2O nanograins and their good electrical contact with CNTs.
机译：通过原位透射电子显微镜研究了在锂插入/萃取过程中限制在碳纳米管（CNT）中的电化学预介质Fe2O3纳米颗粒的结构演变。发现通过CNT的空间限制，防止了在充电过程中形成的含Fe核的Li2O（Fe @ Li2O）纳米预料的聚集和粗化。当材料用作锂离子电池的阳极时，对CNT中的包封Fe2O3纳米颗粒的高可逆能力为2071mA H（-1）。这是Fe2O3电极报告的最高可逆容量。 Fe2O3纳米颗粒的锂储存能力显着提高，由于增强的界面锂储存和LiOH的可逆反应来归因于额外的RIH和固体电解质间转化的额外锂储存，该转化源自CNT的纳米纯净，以及非常Fe @ Li2O纳米的小粒径和它们与CNT的良好电接触。

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  • 来源
    《Advanced energy materials》 |2016年第3期|1501755.1-1501755.10|共10页
  • 作者

    Yu Wan-Jing; Zhang Lili; Hou Peng-Xiang; Li Feng; Liu Chang; Cheng Hui-Ming;

  • 作者单位

    Chinese Acad Sci Inst Met Res Shenyang Natl Lab Mat Sci 72 Wenhua Rd Shenyang 110016 Peoples R China;

    Chinese Acad Sci Inst Met Res Shenyang Natl Lab Mat Sci 72 Wenhua Rd Shenyang 110016 Peoples R China;

    Chinese Acad Sci Inst Met Res Shenyang Natl Lab Mat Sci 72 Wenhua Rd Shenyang 110016 Peoples R China;

    Chinese Acad Sci Inst Met Res Shenyang Natl Lab Mat Sci 72 Wenhua Rd Shenyang 110016 Peoples R China;

    Chinese Acad Sci Inst Met Res Shenyang Natl Lab Mat Sci 72 Wenhua Rd Shenyang 110016 Peoples R China;

    Chinese Acad Sci Inst Met Res Shenyang Natl Lab Mat Sci 72 Wenhua Rd Shenyang 110016 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    carbon nanotubes; confinement effects; Fe2O3 nanoparticles; in situ TEM; lithium-ion batteries;

    机译：碳纳米管;限制效应;Fe2O3纳米颗粒;原位TEM;锂离子电池;

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