Fe3O4–carbon nanocomposites via a simple synthesis as anode materials for rechargeable lithium ion batteries
Fe3O4–carbon nanocomposites via a simple synthesis as anode materials for rechargeable lithium ion batteries
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DOI：
10.1039/c3ce41486h
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发表时间：
2013-11
期刊：
影响因子：
3.1
通讯作者：
Lisha Shen;Huawei Song;H. Cui;X. Wen;Xiaolin Wei;Chengxin Wang
中科院分区：
文献类型：
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作者：
Lisha Shen;Huawei Song;H. Cui;X. Wen;Xiaolin Wei;Chengxin Wang
采用无模板水热法合成了Fe 3 O 4-碳纳米复合材料，并对其进行了退火处理。形貌和成分分析表明，Fe 3 O 4纳米晶均匀地嵌入到介孔碳基体中，粒径约为10 nm。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、拉曼、能量色散谱（EDS）和X射线衍射（XRD）对有趣的构型进行了评价。受益于良好的缓冲和导电性的优点，该纳米复合材料在0.2 C（1 C = 1 A g−1）下的初始容量为1706 mAh g−1。除了优异的锂存储能力外，它还具有上级的循环稳定性，在0.2C和1C下100次循环后容量保持率超过100%。当以可变速率连续放电时，该纳米复合材料在0.1C下保持1249 mAh g-1的可逆容量，在1C下保持690 mAh g-1，在10 C下保持311 mAh g-1。Fe 3 O 4-碳纳米复合材料具有优异的容量和倍率性能，有望成为绿色大规模生产的锂离子电池负极材料。
Fe3O4–carbon nanocomposites have been synthesized simply with a hydrothermal method free of template that is followed by an annealing process. The morphological and compositional analysis reveals that the inter-separated Fe3O4 nanocrystals with a size of ~10 nm are homogeneously embedded within the mesoporous carbon matrix. The interesting configuration is evaluated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman, energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). Benefiting from the advantages of good buffering and electric conductivity, the nanocomposite delivers an initial capacity of 1706 mAh g−1 at 0.2 C (1 C = 1 A g−1). Besides excellent lithium storage capability, it exhibits a superior cycling stability with more than 100% capacity retention after 100 cycles at 0.2 C and 1 C. When successively discharging at variable rates, the nanocomposite retains a reversible capacity of 1249 mAh g−1 at 0.1 C, 690 mAh g−1 at 1 C, and 311 mAh g−1 at 10 C. With excellent capability and rate performance, the Fe3O4–carbon nanocomposites may be a promising anode material of lithium ion batteries (LIBs) for the green large-scale production.