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首页> 外文期刊>Nanotechnology >Enhanced cycling performance of an Fe~0/Fe_3O_4 nanocomposite electrode forp lithium-ion batteries
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Enhanced cycling performance of an Fe~0/Fe_3O_4 nanocomposite electrode forp lithium-ion batteries

机译：Fe〜0 / Fe_3O_4纳米复合电极用于锂离子电池的增强循环性能

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摘要

We demonstrate the formation of a highly conductive, Fe~0//Fe_3O_4 nanocomposite electrode by the hydrogen reduction process. Fe_2O_3 nanobundles composed of one-dimensional nanowires were initially prepared through thermal dehydrogenation of hydrothermally synthesized FeOOH. The systematic phase and morphological evolutions from Fe_2O_3 to Fe_2O_3/Fe_3O_4, Fe_3O_4, and finally to Fe/Fe_3O_4 by the controlled thermochemical reduction at 300℃ in H_2 were characterized using x-ray diffraction (XRD) and transmission electron microscopy (TEM). The Fe/Fe_3O_4 nanocomposite electrode shows excellent capacity retention (～540 mA h g~(-1) after 100 cycles at a rate of 185 mA g~(-1), compared to that of Fe_2O_3 nanobundles. This enhanced electrochemical performance in Fe/Fe_3O_4 composites was attributed to the formation of unique, core—shell nanostructures offering an efficient electron transport path to the current collector.
机译：我们演示了通过氢还原过程形成的高导电性Fe〜0 // Fe_3O_4纳米复合电极。首先通过水热合成FeOOH的热脱氢制备由一维纳米线组成的Fe_2O_3纳米束。利用X射线衍射（XRD）和透射电镜（TEM）对H_2在300℃下的热化学控制还原过程中，Fe_2O_3到Fe_2O_3 / Fe_3O_4，Fe_3O_4，最后到Fe / Fe_3O_4的系统相和形貌演化进行了表征。与Fe_2O_3纳米束相比，Fe / Fe_3O_4纳米复合电极在185 mA g〜（-1）的速率下循环100次后表现出优异的容量保持率（〜540 mA hg〜（-1）。 Fe_3O_4复合材料的形成归因于独特的核-壳纳米结构的形成，该结构提供了向集电器的有效电子传输路径。

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