Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 738, Issue -, Pages 89-96Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.12.131
Keywords
Fe2O3; Mulberry-shaped; Graphene composite; Supercapacitor
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Funding
- National Natural Science Foundation of China [21561029, 21471127]
- Scientific Research Program of the Higher Education Institution of Xinjiang [XJEDU20161014]
- Natural Science Foundation of Xinjiang University [BS150262]
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We report a facile method to synthesize nanocomposites with Fe2O3 nanoparticles (NPs) loaded on the surface of the reduced graphene oxide nanosheets (rGO) or wrapped into rGO sheets by simply regulating the temperatures and times of the hydrothermal reaction, which combines the growth of Fe2O3 NPs and the reduction of graphene oxide simultaneously. The morphology and microstructure of these samples were examined by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectra, X-ray photoelectron spectroscopy, Fourier transform infrared spectrometer and nitrogen isothermal adsorption-desorption. The effects of different temperatures and times of hydrothermal reaction on the microstructure and capacitive performance of these prepared composites were investigated in detail. The as-synthesized mulberry-shaped alpha-Fe2O3 NPs/graphene nanocomposite shows remarkable pseudocapacitive activity containing high specific capacitance (1051 F g(-1) at 1 A g(-1)) and excellent rate capability (548 F g(-1) at 30 A g(-1)). (C) 2017 Elsevier B.V. All rights reserved.
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