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首页> 外文期刊>New Journal of Chemistry >Enhanced stability of smoothly electrodeposited amorphous Fe2O3@electrospun carbon nanofibers as self-standing anodes for lithium ion batteries
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Enhanced stability of smoothly electrodeposited amorphous Fe2O3@electrospun carbon nanofibers as self-standing anodes for lithium ion batteries

机译：增强电沉积的无定形Fe2O3的稳定性，作为锂离子电池的自支撑阳极作为自支撑阳极

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摘要

Fe2O3 and carbon nanofiber (Fe2O3@CNFs) composite anodes for lithium ion batteries (LIBs) were fabricated by electrospinning and electrodeposition of naturally abundant, environmentally friendly, and cost effective materials to provide a simple route for modulating the morphology of the anodes and their performance. These anodes offer the advantage of being self-supporting to avoid increased mass of the electrodes from the binder, carbon black and the current collector, so the performance is reported on the basis of the full mass of the electrode (0.5-0.8 mg cm(-2)). Anodes consisting of nanofibers with a flat morphology without nanoscale roughness exhibit a superior cyclic stability (692 mA h g(-1) in the 2nd cycle vs. 518 mA h g(-1) after 100 cycles at 0.05 A g(-1)) compared with an anode with nanoscale roughness, where the capacity faded by 36.6% under the same conditions. The improvement in the cyclic performance for the flat morphology was attributed to the formation of a stable solid-electrolyte interface layer on the smooth sample combined with the enhanced contact between Fe2O3 and the CNFs, which inhibited degradation from the volume change of Fe2O3 during the successive charge and discharge. The Fe2O3@CNFs with flat morphology also exhibit reasonable performance (232 mA h g(-1)) at a high current density of 2.5 A g(-1). These studies provide insights about how morphology impacts performance, namely the flat morphology at the nanoscale can stabilize the interfaces between the electrolyte and electrode composed of carbon and high performance active materials to promote long cycle life.
机译：用于锂离子电池（LIBS）的Fe2O3和碳纳米纤维（Fe2O3 @ C​​NFS）复合阳极（Libs）通过静电纺丝和电沉积的天然丰富，环保，具有成本效益的材料来制造，以提供一种调节阳极形态及其性能的简单路线。这些阳极提供了自支撑的优点，以避免从粘合剂，炭黑和集电器的电极增加的质量，因此在电极的全质量（0.5-0.8mgcm（ -2））。由没有纳米级粗糙度的平坦形态组成的碱脂肪，其在0.05Ag（-1）的100次循环之后，在第2循环中具有优异的循环稳定性（692mA Hg（-1）。比较阳极具有纳米级粗糙度，其中容量在相同条件下褪色36.6％。平坦形态的循环性能的改善归因于在平滑样品上形成稳定的固体电解质界面层与Fe2O3和CNF之间的增强接触结合，这抑制了在连续期间Fe2O3的体积变化的降解充电和放电。具有平整形态的Fe2O3 @ C​​NF也表现出合理的性能（232 mA H（-1）），高电流密度为2.5Ag（-1）。这些研究提供了关于形态学如何影响性能的见解，即纳米级的平整形态可以稳定由碳和高性能活性材料构成的电解质和电极之间的界面，以促进长循环寿命。

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  • 来源
    《New Journal of Chemistry》 |2018年第3期|共12页
  • 作者

    Kobayashi Yuta; Abe Jyunichiro; Kawase Koki; Takahashi Keisuke; Vogt Bryan D.; Shiratori Seimei;

  • 作者单位

    Keio Univ Grad Sch Sci &

    Technol Sch Integrated Design Engn Ctr Mat Design Sci Kohoku Ku 3-14-1 Hiyoshi Yokohama Kanagawa 2238522 Japan;

    Keio Univ Grad Sch Sci &

    Technol Sch Integrated Design Engn Ctr Mat Design Sci Kohoku Ku 3-14-1 Hiyoshi Yokohama Kanagawa 2238522 Japan;

    Keio Univ Grad Sch Sci &

    Technol Sch Integrated Design Engn Ctr Mat Design Sci Kohoku Ku 3-14-1 Hiyoshi Yokohama Kanagawa 2238522 Japan;

    Keio Univ Grad Sch Sci &

    Technol Sch Integrated Design Engn Ctr Mat Design Sci Kohoku Ku 3-14-1 Hiyoshi Yokohama Kanagawa 2238522 Japan;

    Univ Akron Dept Polymer Engn 250 S Forge St Akron OH 44325 USA;

    Keio Univ Grad Sch Sci &

    Technol Sch Integrated Design Engn Ctr Mat Design Sci Kohoku Ku 3-14-1 Hiyoshi Yokohama Kanagawa 2238522 Japan;

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