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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Novel Fe2P/graphitized carbon yolk/shell octahedra for high-efficiency hydrogen production and lithium storage
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Novel Fe2P/graphitized carbon yolk/shell octahedra for high-efficiency hydrogen production and lithium storage

机译：新型Fe2P /石墨化碳黄/壳八面体，可高效制氢和储锂

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摘要

We successfully designed and synthesized thin octahedral graphitized carbon shells with Fe2P particles enveloped inside them through a simple hydrothermal method and calcination process. Notably, the precursor Fe2PO5/polymeric layer octahedra (FPO/PLO) composite was one-step synthesized via a hydrothermal route. The final Fe2P/graphitized carbon (Fe2P/GC) yolk/shell octahedra composite was used for both the hydrogen evolution reaction (HER) and lithium-ion batteries (LIBs). In 0.5 M H2SO4 aqueous solution, the obtained Fe2P/GC yolk/shell octahedra composite possessed a strong catalytic activity towards the HER. The overpotential requirement to obtain a 10 mA cm(-2) current density was as low as 76 mV. The as-prepared composite was also applied in LIBs as the anode electrode. The electrochemical test exhibited a steady specific capacity of similar to 627 mA h g(-1) and a nearly 100% coulombic efficiency at a current density of 0.1 A g(-1). Therefore, the Fe2P/GC yolk/shell composite is a promising anode for use in LIBs and presents a high specific capacity, favorable rate capability, and a long circulatory stability.
机译：我们通过简单的水热法和煅烧工艺成功设计并合成了包覆有Fe2P颗粒的薄八面体石墨化碳壳。值得注意的是，前驱体Fe2PO5 /聚合物层八面体（FPO / PLO）复合材料是通过水热途径一步合成的。最终的Fe2P /石墨化碳（Fe2P / GC）蛋黄/壳八面体复合材料既用于析氢反应（HER），又用于锂离子电池（LIB）。在0.5 M H2SO4水溶液中，所得Fe2P / GC蛋黄/壳八面体复合材料对HER具有很强的催化活性。获得10 mA cm（-2）电流密度的过电位要求低至76 mV。所制备的复合材料也被应用于LIB中作为阳极。电化学测试显示，在电流密度为0.1 A g（-1）时，稳定的比容类似于627 mA h g（-1），库仑效率接近100％。因此，Fe2P / GC卵黄/壳复合材料是用于LIB的有希望的阳极，并且具有高的比容量，有利的速率能力和长的循环稳定性。

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