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首页> 外文期刊>RSC Advances >Nanoporous iron oxide@carbon composites with low carbon content as high-performance anodes for lithium-ion batteries
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Nanoporous iron oxide@carbon composites with low carbon content as high-performance anodes for lithium-ion batteries

机译：纳米多孔氧化铁@碳复合材料，低碳含量为锂离子电池的高性能阳极

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摘要

A composite of nanoporous iron oxide (Fe2O3) nanoparticles coated with a thin layer of carbon (designated as nanoporous Fe2O3@C) is synthesized using a convenient one-pot solvothermal method. Although the thickness of the carbon framework is only 6 nm on average, which is very small compared to the size of Fe2O3 nanoparticles, the carbon framework significantly enhances the electrochemical performance of nanoporous Fe2O3@C composites when they are used as an anode material for lithium-ion batteries. Thanks partly to the relatively low carbon content of 6.7 wt%, the nanoporous Fe2O3@C anodes exhibit a high reversible capacity of 767 mA h g(-1) after 100 cycles at a current density of 500 mA g(-1) and 545 mA h g(-1) even at a higher current density of 2 A g(-1). In comparison to commercial Fe2O3 nanoparticles and bare nanoporous Fe2O3 nanoparticles, the nanoporous Fe2O3@C anodes show superior cycle life. The nanoporous structure offers void space for volume change of Fe2O3 nanoparticles, while the thin carbon framework improves the stability of structures and SEI (solid electrolyte interphase) films during the continuous intercalation/deintercalation processes of Li ions.
机译：使用一种方便的单壶溶液，合成涂覆有薄层碳氧化铁（Fe2O3）纳米颗粒的纳米氧化铁（Fe2O3）纳米颗粒（指定为纳米多孔Fe 2 O 3 C）。尽管碳骨架的厚度平均仅为6nm，但与Fe2O3纳米颗粒的尺寸相比，碳框架非常小，碳框架显着提高了纳米孔Fe2O3 @ C​​复合材料的电化学性能，当它们用作锂的阳极材料时电池。部分地感谢碳含量为6.7wt％，纳米孔Fe2O3 @ C​​阳极在电流密度为500mA g（-1）和545 mA时，在100次循环后表现出高可逆容量为767 mA Hg（-1） Hg（-1）即使在较高的电流密度为2ag（-1）。与商业Fe2O3纳米颗粒和裸纳米孔Fe2O3纳米颗粒相比，纳米孔Fe2O3致阳极显示出优异的循环寿命。纳米多孔结构提供了氧化铁纳米颗粒的体积变化的空隙空间，Li离子的，而薄碳骨架的连续插入期间，这改善结构和SEI（固体电解质相界面）膜的稳定性/脱嵌过程。

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  • 来源
    《RSC Advances》 |2015年第108期|共7页
  • 作者

    Xu Xiaoqian; Wan Yuanxin; Sha Ye; Deng Weijia; Xue Gi; Zhou Dongshan;

  • 作者单位

    Nanjing Univ Sch Chem &

    Chem Engn Dept Polymer Sci &

    Engn State Key Lab Coordinat Chem Nanjing Natl Lab Mic Nanjing 210093 Jiangsu Peoples R China;

    Nanjing Univ Sch Chem &

    Chem Engn Dept Polymer Sci &

    Engn State Key Lab Coordinat Chem Nanjing Natl Lab Mic Nanjing 210093 Jiangsu Peoples R China;

    Nanjing Univ Sch Chem &

    Chem Engn Dept Polymer Sci &

    Engn State Key Lab Coordinat Chem Nanjing Natl Lab Mic Nanjing 210093 Jiangsu Peoples R China;

    Nanjing Univ Sch Chem &

    Chem Engn Dept Polymer Sci &

    Engn State Key Lab Coordinat Chem Nanjing Natl Lab Mic Nanjing 210093 Jiangsu Peoples R China;

    Nanjing Univ Sch Chem &

    Chem Engn Dept Polymer Sci &

    Engn State Key Lab Coordinat Chem Nanjing Natl Lab Mic Nanjing 210093 Jiangsu Peoples R China;

    Nanjing Univ Sch Chem &

    Chem Engn Dept Polymer Sci &

    Engn State Key Lab Coordinat Chem Nanjing Natl Lab Mic Nanjing 210093 Jiangsu Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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