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首页> 外文期刊>International Journal of Electrochemical Science >Fe3O4?Nanorods and Polyhedrons as Anodes for Lithium Ion Batteries: Morphology and Electrochemical Properties
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Fe3O4?Nanorods and Polyhedrons as Anodes for Lithium Ion Batteries: Morphology and Electrochemical Properties

机译：Fe3O4？纳米棒和多面体作为锂离子电池的阳极：形态和电化学性能

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摘要

A solvothermal process with temperature up to 350°C has been exploited for the fabrication of Fe3O4 with diverse morphologies. The influences of solvothermal temperature and treating time on the composition, morphology and electrochemical properties of the resulted Fe3O4 samples have been studied. Electrochemical properties of the obtained Fe3O4 with morphologies of nanorods, nanoplates and polyhedrons have been explored as anode materials for lithium ion batteries. It has been found that two typical morphologies of nanorods and polyhedrons can be resulted by varying the solvothermal treating times from 12 to 72 h. The morphology evolution of the Fe3O4 sample upon treating times has been discussed by analyzing the control experiments. The Fe3O4 nanorods obtained under the favorite condition, i.e. solvothermally at 350°C for 12h and then calcined at 500°C for 2h delivered a superior reversible capacity of 807.9 mAh g ?1 at 0.2 A g?1 even after 200 charging-discharging cycles, demonstrating excellent cycle stability. It shows also satisfied rate capability of 360 mAh g-1 at current density of 2 A g-1 . The superior electrochemical performance of the Fe3O4 nanorods has been discussed from the structure character and the composition aspects.
机译：具有温度高达350°C的溶剂热处理，用于制备Fe3O4与不同的形态。已经研究了溶剂热温和处理时间对所得Fe3O4样品的组成，形态和电化学性质的影响。所得Fe3O4的电化学性能具有纳米棒，纳米层，纳米板和多面体形态的形态，已被探索为锂离子电池的阳极材料。已经发现，通过改变12至72小时的溶剂热处理时间，可以通过改变溶剂热处理时间来导致纳米棒和多叠氮的两个典型形态。通过分析对照实验讨论了Fe3O4样品在治疗时间后的形态演化。在最喜欢的条件下获得的Fe3O4纳米棒，即在350℃下溶于12小时，然后在500℃下煅烧2小时，在200μg×1的情况下以0.2Ag≤1在0.2ag'1处递送优异的可逆容量，展示出色的循环稳定性。它表明，在电流密度为2 A G-1的情况下也显示360mAh G-1的速率能力。已经从结构特征和组合物方面讨论了Fe3O4纳米棒的卓越电化学性能。

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