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首页> 外文期刊>Chemical engineering journal >In situ growth of amorphous Fe2O3 on 3D interconnected nitrogen-doped carbon nanofibers as high-performance anode materials for sodium-ion batteries
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In situ growth of amorphous Fe2O3 on 3D interconnected nitrogen-doped carbon nanofibers as high-performance anode materials for sodium-ion batteries

机译：在3D互连的氮气掺杂碳纳米纤维上以钠离子电池的高性能阳极材料，原位生长

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摘要

In this work, a novel porous amorphous Fe2O3/nitrogen-doped carbon composite as a promising anode material for sodium-ion batteries has been fabricated by in situ growing amorphous Fe2O3 on 3D interconnected nitrogen-doped carbon nanofibers. The as-prepared composite exhibits superior sodium storage properties. It delivers a high reversible capacity of 408 mAh g~(-1) after 350 cycles at a current density of 100 mAg~(-1) and a good rate capability of 183mAhg~(-1) at 3Ag~(-1). The excellent electrochemical performance is owing to the synergistic effects of the amorphous structure of Fe2O3 and the 3D interconnected nitrogen-doped carbon network with high nitrogen doping content (10 atom%), which do not only relieve the internal stress of the electrode and accommodate more electrochemical active sites for Na + storage, but also buffer the volume changes of amorphous Fe2O3 as well as facilitate the electronic and ionic transportation during cycling.
机译：在这项工作中，通过在3D互连的氮掺杂碳纳米纤维上的原位生长无定形Fe2O3制造了一种新型多孔无定形Fe2O3 /氮掺杂碳复合材料作为钠离子电池的有希望的阳极材料。 制备的复合材料表现出优异的钠储存性能。 在350次循环以100mAg〜（-1）的350次循环之后，在350mAg〜（1）的良好速率能力下，它在350mAhg〜（-1）的良好速率能力下提供高可逆容量。 优异的电化学性能是由于Fe2O3的无定形结构和3D互连的氮掺杂碳网络具有高氮掺杂含量（10个原子％）的协同效应，这不仅能够缓解电极的内应力并容纳更多 Na +储存的电化学活性位点，还缓冲了无定形Fe2O3的体积变化，并促进循环期间的电子和离子运输。

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