Three-dimensional network structured α-Fe2O3 made from a stainless steel plate as a high-performance electrode for lithium ion batteries
Three-dimensional network structured α-Fe2O3 made from a stainless steel plate as a high-performance electrode for lithium ion batteries
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DOI：
10.1039/c3ta10821j
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发表时间：
2013-05
影响因子：
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通讯作者：
Xiu Li;L. Qiao;Dan Li;Xinghui Wang;Wenhe Xie;D. He
中科院分区：
文献类型：
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作者：
Xiu Li;L. Qiao;Dan Li;Xinghui Wang;Wenhe Xie;D. He
采用化学腐蚀和热氧化相结合的方法制备了具有三维网络结构的α-Fe 2 O3。当该结构直接用作锂离子电池（LIB）的电极时，在第二次放电的200 mA g-1的电流密度下获得858.2 mA h g-1的高可逆容量。特别是，它在第100次充放电循环时保持了1105.6 mA h g−1的容量。根据不同电压区的容量变化，研究了循环容量增加的机理。在各种电流密度下循环后，它可以在高达5000 mA g− 1的电流密度下提供520.0 mA h g −1的容量，表明通过这种简单的路线制备的电极可以成为高功率LIB的有希望的候选者。
Three-dimensional network structured α-Fe2O3 was prepared by a facile chemical corrosion of a stainless steel plate followed by thermal oxidation. When the architecture was directly used as an electrode for lithium ion batteries (LIBs), a high reversible capacity of 858.2 mA h g−1 was obtained at a current density of 200 mA g−1 for the 2nd discharge. Especially, it retained a capacity of 1105.6 mA h g−1 at the 100th discharge–charge cycle. The mechanism behind the capacity increase with cycling has been investigated based on the capacity changes in different voltage regions. After cycling with various current densities, it can deliver a capacity of 520.0 mA h g−1 at a current density as high as 5000 mA g−1, indicating that the electrode prepared by such a simple route can be a promising candidate for high-power LIBs.