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首页> 外文期刊>Materials Letters >Facile solution-free preparation of a carbon coated Fe3O4 nanoparticles/expanded graphite composite with outstanding Li-storage performances
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Facile solution-free preparation of a carbon coated Fe3O4 nanoparticles/expanded graphite composite with outstanding Li-storage performances

机译：无溶剂溶液制备具有出色的锂存储性能的碳包覆的Fe3O4纳米颗粒/膨胀石墨复合材料

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摘要

A novel carbon coated Fe3O4 nanoparticles (NPs)/expanded graphite (EG) composite has been prepared by in-situ pyrolysis of ferrecene on the nanosheets (NSs) of EG in an isolated atmosphere. Results indicated that the restack behavior of the NSs of EG which is easy to be induced by solvent removal was effectively avoided by this solution-free route. Well-crystallized Fe3O4-NPs with a dimension of <5 nm were observed to be homogeneously anchored on these NSs. The composite as anode material of Li-ion batteries (LIBs) exhibited prominently enhanced reversible capacity and rate capability, meanwhile inherited the superior cycling performance of EG. After 100 cycles at 100 mA g(-1), the charge capacity still reached 728 mA h g(-1), which was 283% higher than that of pure EG. The greatly improved electrochemical performances are ascribed to the favorable synergistic effect between carbon coated Fe3O4-NPs and EG, suggesting that the special Fe3O4-NPs/EG composite is promising anode material for high-performance LIBs. (C) 2016 Elsevier B.V. All rights reserved.
机译：通过在隔离的气氛中将二茂铁在EG纳米片（NSs）上原位热解制备了一种新型的碳包覆Fe3O4纳米粒子（NPs）/膨胀石墨（EG）复合材料。结果表明，通过这种无溶液途径有效地避免了容易被溶剂去除诱导的EG的NS的重堆行为。观察到尺寸小于5 nm的结晶良好的Fe3O4-NPs均匀地锚定在这些NS上。作为锂离子电池（LIBs）负极材料的复合材料具有显着增强的可逆容量和倍率性能，同时继承了EG的优异循环性能。在100 mA g（-1）下进行100次循环后，充电容量仍达到728 mA h g（-1），比纯EG高283％。电化学性能的大大提高归因于碳包覆的Fe3O4-NPs与EG之间的良好协同作用，这表明特殊的Fe3O4-NPs / EG复合材料是用于高性能LIB的有希望的负极材料。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Materials Letters》 |2016年第15期|148-151|共4页
  • 作者

    Zhao Yun; Ma Canliang; Ma Chang; Shi Jing; Shi Jingli;

  • 作者单位

    Shanxi Univ, Inst Mol Sci, Key Lab Mat Energy Convers & Storage Shanxi Prov, Taiyuan 030006, Peoples R China;

    Shanxi Univ, Inst Mol Sci, Key Lab Mat Energy Convers & Storage Shanxi Prov, Taiyuan 030006, Peoples R China;

    Tianjin Polytech Univ, Sch Mat Sci & Engn, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China;

    Chinese Acad Sci, Analyt Instrumentat Ctr, Inst Coal Chem, Taiyuan 030006, Peoples R China;

    Tianjin Polytech Univ, Sch Mat Sci & Engn, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nanoparticles; Expanded graphite; Solution-free route; Energy storage and conversion;

    机译：纳米颗粒;膨胀石墨;无溶液途径;储能转化;

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