Fe3O4-Graphene Nanocomposites with Improved Lithium Storage and Magnetism Properties
Fe3O4-Graphene Nanocomposites with Improved Lithium Storage and Magnetism Properties
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Fe3O4-石墨烯纳米复合材料具有改进的锂存储和磁性
DOI：
10.1021/jp201666s
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发表时间：
2011-08-04
影响因子：
3.7
通讯作者：
Hu, Changwen
中科院分区：
文献类型：
--
作者：
Su, Jing;Cao, Minhua;Hu, Changwen
本文提出了一种简单的水热一步法制备石墨烯-Fe 3 O 4（GN-Fe 3 O 4）纳米复合材料的方法，其中氧化石墨（GO）片还原为GN的过程伴随着Fe 3 O 4纳米颗粒的生成。该方法对GO的还原程度可与常规方法相当。透射电子显微镜图像显示，直径小至7 nm的所形成的Fe 3 O 4纳米颗粒致密且均匀地沉积在GN片上，结果，有效地防止了Fe 3 O 4纳米颗粒的聚集。GN Fe 3 O 4纳米复合材料具有改善的循环稳定性和倍率性能，作为高性能锂离子电池的潜在负极材料。此外，GN-Fe 3 O 4纳米复合材料表现出超顺磁性行为，使它们成为生物纳米技术/可控靶向药物递送领域的实际应用的有前途的候选者。
In this paper, we proposed a facile one-step strategy to prepare graphene-Fe3O4 (GN-Fe3O4) nanocomposites under hydrothermal conditions, where the reduction process of graphite oxide (GO) sheets into GN was accompanied by the generation of Fe3O4 nanoparticles. The reduction extent of GO by this process could be comparable to that by conventional methods. A transmission electron microscopy image has shown that the as-formed Fe3O4 nanoparticles with a diameter as small as 7 nm were densely and uniformly deposited on GN sheets, and, as a result, the aggregating of the Fe3O4 nanoparticles was effectively prevented. The GN Fe3O4 nanocomposites exhibit improved cycling stability and rate performances as a potential anode material for high-performance lithium ion batteries. In addition, the GN-Fe3O4 nanocomposites exhibit a superparamagnetic behavior, making them promising candidates for practical applications in the fields of bionanotechnology/controlled targeted drug delivery.