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首页> 外文期刊>RSC Advances >Synthesis of alpha-Fe2O3, Fe3O4 and Fe2N magnetic hollow nanofibers as anode materials for Li-ion batteries
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Synthesis of alpha-Fe2O3, Fe3O4 and Fe2N magnetic hollow nanofibers as anode materials for Li-ion batteries

机译：α-Fe2O3，Fe3O4和Fe2N磁空心纳米纤维作为锂离子电池的阳极材料

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摘要

alpha-Fe2O3 hollow nanofibers were synthesized via a facile electrospinning process followed by a post-calcination process, and for the first time, Fe3O4 and Fe2N hollow nanofibers were successfully obtained via reduction and nitridation of the prepared alpha-Fe2O3 hollow nanofibers in the presence of NH3 atmosphere at 350 degrees C and 400 degrees C, respectively. The crystal structure, morphology and compositions of the alpha-Fe2O3, Fe3O4 and Fe2N hollow nanofibers were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive spectrometry (EDS). Electrochemical measurements show that the alpha-Fe2O3 and Fe3O4 hollow nanofibers electrodes deliver a high specific initial discharge capacity of 1314 and 1210 mA h g (1), respectively, and a stable cycling performance (980 mA h g(-1) for alpha-Fe2O3 after 200 cycles and 572 mA h g(-1) for Fe3O4 after 300 cycles) at a current density of 100 mA g(-1). The Fe2N hollow nanofibers electrode demonstrates a high initial discharge capacity, good cycling stability (438 mA h g(-1) at the 300th cycle with a current density of 100 mA g(-1)), high coulombic efficiency, and excellent rate capability. The superior electrochemical performances are attributed to the unique one-dimensional hollow nanostructure of the materials. The prepared hollow nanofibers are candidate anode materials for Li-ion batteries.
机译：通过容易的静电纺丝过程合成α-Fe2O3中空纳米纤维，然后通过煅烧后工艺合成，并且首次通过制备的α-Fe2O3中空纳米纤维的还原和氮化成功获得Fe 3 O 4和Fe2N中空纳米纤维NH3气氛分别为350℃和400℃。通过X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM）研究了α-Fe2O3，Fe2O3，Fe 2 O 3，Fe 2 O 3和Fe2N中空纳米纤维的晶体结构，形态和组合物，透射电子显微镜（TEM）和能量分散光谱（EDS） 。电化学测量表明，α-Fe2O3和Fe3O4中空纳米纤维电极分别为1314和1210 mA Hg（1）的高特异性初始放电容量，以及稳定的循环性能（980 mA Hg（-1）后，α-Fe2O3在300次循环后的200次循环和572 mA Hg（-1），电流密度为100mA g（-1）。 Fe2N中空纳米纤维电极通过电流密度为100 mA g（-1）），高库仑效率和优异的速率能力，表现出高初始放电容量，循环稳定性（438mA H（-1）），高的库仑效率和优异的速率能力。卓越的电化学性能归因于材料的独特一维中空纳米结构。制备的中空纳米纤维是锂离子电池的候选阳极材料。

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  • 来源
    《RSC Advances》 |2016年第112期|共10页
  • 作者

    Guo Jiangdong; Yang Ying; Yu Wensheng; Dong Xiangting; Wang Jinxian; Liu Guixia; Wang Tingting;

  • 作者单位

    Changchun Univ Sci &

    Technol Key Lab Appl Chem &

    Nanotechnol Univ Jilin Prov Changchun 130022 Peoples R China;

    Changchun Univ Sci &

    Technol Key Lab Appl Chem &

    Nanotechnol Univ Jilin Prov Changchun 130022 Peoples R China;

    Changchun Univ Sci &

    Technol Key Lab Appl Chem &

    Nanotechnol Univ Jilin Prov Changchun 130022 Peoples R China;

    Changchun Univ Sci &

    Technol Key Lab Appl Chem &

    Nanotechnol Univ Jilin Prov Changchun 130022 Peoples R China;

    Changchun Univ Sci &

    Technol Key Lab Appl Chem &

    Nanotechnol Univ Jilin Prov Changchun 130022 Peoples R China;

    Changchun Univ Sci &

    Technol Key Lab Appl Chem &

    Nanotechnol Univ Jilin Prov Changchun 130022 Peoples R China;

    Changchun Univ Sci &

    Technol Key Lab Appl Chem &

    Nanotechnol Univ Jilin Prov Changchun 130022 Peoples R China;

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