Synthesis of well-defined Fe3O4 nanorods/N-doped graphene for lithium-ion batteries

The geometric size and distribution of magnetic nanoparticles are critical to the morphology of graphene （GN） nanocomposites, and thus they can affect the capacity and cycling performance when these composites are used as anode materials in lithium-ion batteries （LiBs）. In this work, Fe304 nanorods...

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Bibliographic Details
Published in:Nano research 2016-05, Vol.9 (5), p.1256-1266
Main Authors: Jiao, Jiqing, Qiu, Wenda, Tang, Jianguo, Chen, Liuping, Jing, Laiying
Format: Article
Language:English
Subjects:
Anodes
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Chemical synthesis
Chemistry and Materials Science
Condensed Matter Physics
Electrical conductivity
Electrical resistivity
Electrode materials
Electron microscopy
Electron transport
Fe3O4
Fourier transforms
Graphene
Infrared analysis
Iron oxides
Lithium
Lithium-ion batteries
Materials Science
Mathematical morphology
Nanocomposites
Nanoparticles
Nanorods
Nanotechnology
Nitrogen
Photoelectron spectroscopy
Rechargeable batteries
Research Article
Sheets
Size distribution
Spectroscopy
Spectrum analysis
Thermogravimetric analysis
Transmission electron microscopy
X ray photoelectron spectroscopy
X-ray diffraction
X-rays
X射线光电子能谱
掺杂石墨
氮掺杂
纳米复合材料
纳米棒
透射电子显微镜
锂离子电池
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Summary:The geometric size and distribution of magnetic nanoparticles are critical to the morphology of graphene （GN） nanocomposites, and thus they can affect the capacity and cycling performance when these composites are used as anode materials in lithium-ion batteries （LiBs）. In this work, Fe304 nanorods were deposited onto fully extended nitrogen-doped GN sheets from a binary precursor in two steps, a hydrothermal process and an annealing process. This route effectively tuned the Fe3O4 nanorod size distribution and prevented their aggregation. The transformation of the binary precursor was characterized by X-ray diffraction （XRD）, Fourier transform infrared （FTIR） spectroscopy, X-ray photoelectron spectroscopy （XPS）, thermogravimetric analysis （TGA）, and transmission electron microscopy （TEM）. XPS analysis indicated the presence of N-doped GN sheets, and that the magnetic nanocrystals were anchored and uniformly distributed on the surface of the flattened N-doped GN sheets. As a high performance anode material, the structure was beneficial for electron transport and exchange, resulting in a large reversible capacity of 929 mA·h·g^-1, high-rate capability, improved cycling stability, and higher electrical conductivity. Not only does the result provide a strategy for extending GN composites for use as LiB anode materials, but it also offers a route for the preparation of other oxide nanorods from binary precursors.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-016-1021-1