Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 586, Issue -, Pages 745-753Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.10.078
Keywords
RGO/Cu2O/Cu composites; Thin films; Hydrothermal synthesis; Supercapacitors
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Funding
- National Natural Science Foundation of China [20504026]
- Shanghai Natural Science Foundation [13ZR1411900]
- Shanghai Leading Academic Discipline Project [B502]
- Shanghai Key Laboratory Project [08DZ2230500]
- Australian Research Council [DP130102699, DP130102274]
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Reduced graphene oxide/cuprous oxide (RGO/Cu2O) composite films were directly synthesized on the surface of copper foil substrates through a straight redox reaction between GO and Cu foil via a hydrothermal approach. Characterization of the resultant composites with X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and field emission scanning electron microscope (FESEM) confirms the formation of Cu2O and reduction of GO, in which Cu2O nanoparticles were well covered by RGO. The resultant composites (referred to as RGO/Cu2O/Cu) were directly used as electrodes for supercapacitors, and their electrochemical performance was assessed by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectrometry (EIS) in 1 M KOH aqueous solution. A specific capacitance of 98.5 F g(-1) at 1 A g(-1) was obtained, which is much higher than that of pure Cu2O prepared under the same conditions, due to the presence of RGO. (C) 2013 Elsevier B.V. All rights reserved.
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