期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 616, 期 -, 页码 58-65出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.07.047
关键词
Supercapacitor; Cobalt molybdate; Graphene; Microwave; Nanocomposite
A facile and efficient strategy for preparing reduced graphene oxide-cobalt molybdate (RGO/CoMoO4) nanocomposites assisted by microwave irradiation for the first time is demonstrated. The resulting nanocomposites are comprised of CoMoO4 nanoparticles that are well-anchored on graphene sheets by in situ reducing. The prepared RGO/CoMoO4 nanocomposites have been thoroughly characterized by Fourier-transform infrared spectroscopy, X-ray diffraction, Raman spectroscopy, thermogravimetric analysis, scanning electron microscopy and X-ray photoelectron spectroscopy. Importantly, the prepared nanocomposites exhibit excellent electrochemical performance for supercapacitors. Results show that RGO/CoMoO4 nanocomposites exhibited much better electrochemical capability than pure-CoMoO4 and RGO/CoMoO4 for annealing. RGO/CoMoO4 nanocomposites with 37.4 wt% CoMoO4 content achieved a specific capacitance about 322.5 F g(-1) calculated from the CV plots at 5 mV s(-1), which was higher than that of pure-CoMoO4 (95.0 F g(-1)) and RGO/CoMoO4 for annealing (102.5 F g(-1)). The good electrochemical performance can be attributed to the synergistic effects of the individual components. (C) 2014 Elsevier B.V. All rights reserved.
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