Carbon-wrapped Fe3O4 nanoparticle films grown on nickel foam as binder-free anodes for high-rate and long-life lithium storage.
Carbon-wrapped Fe3O4 nanoparticle films grown on nickel foam as binder-free anodes for high-rate and long-life lithium storage.
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DOI：
10.1021/am404756h
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发表时间：
2014-01
影响因子：
9.5
通讯作者：
Dan Li;Xiu Li;Suiyan Wang;Yunxian Zheng;L. Qiao;D. He
中科院分区：
文献类型：
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作者：
Dan Li;Xiu Li;Suiyan Wang;Yunxian Zheng;L. Qiao;D. He
以蔗糖为前驱体，采用水热法在泡沫镍表面制备了碳包覆Fe 3 O 4纳米颗粒薄膜。所制备的样品直接用作锂离子电池的无粘结剂阳极，其表现出增强的倍率性能和优异的循环性能。在高达10 C的电流密度下，经过2000次以上的循环后，可逆容量为543 mA h g（-1）。这种上级的电化学性能可以归因于薄碳层的形成，该薄碳层构建了包裹纳米尺寸的Fe 3 O 4颗粒的3D网络结构。这样的结构可以促进电子转移并适应放电/充电循环期间活性材料的体积变化。
Carbon-wrapped Fe3O4 nanoparticle films on nickel foam were simply prepared by a hydrothermal synthesis with sucrose as a precursor of subsequent carbonization. The as-prepared samples were directly used as binder-free anodes for lithium-ion batteries which exhibited enhanced rate performance and excellent cyclability. A reversible capacity of 543 mA h g(-1) was delivered at a current density as high as 10 C after more than 2000 cycles. The superior electrochemical performance can be attributed to the formation of a thin carbon layer which constructs a 3D network structure enwrapping the nanosized Fe3O4 particles. Such an architecture can facilitate the electron transfer and accommodate the volume change of the active materials during discharge/charge cycling.