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Ruthenium nanoparticles-modified reduced graphene prepared by a green method for high-performance supercapacitor application in neutral electrolyte

Hassan, Hagar K.; Atta, Nada F.; Hamed, Maher M.; Galal, Ahmed; Jacob, Timo

Here, we report a one-pot preparation method of a ruthenium-based reduced graphene oxide hybrid (Runano-based RGO). The synthesis is based on a single step for the reduction of Ru3+ (RuCl3) into Ru nanoparticles, and graphene oxide (GO) into reduced graphene oxide (RGO) without the use of any reducing agent. The structure of the hybrid material was ascertained using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and high resolution transmission spectroscopy (HRTEM). The change in pH of the synthesis media resulted in different structures and morphologies. A mixture of Ru and RuO2 (3:2) was obtained at pH 8.0, while only Ru-nanoparticles were obtained at pH 4.0. The supercapacitor performance of the hybrid was investigated in a neutral electrolyte, 1.0 M NaNO3, in a three-electrode setup. Runano-based RGO prepared at pH 8 exhibited a maximum specific capacitance of 270 F g−1 (238.5 mF cm−2), and maximum energy and power densities of 15 W h kg−1 and 76.4 kW kg−1, respectively. The proposed supercapacitor has a stable potential window up to 1.1 V with very good cycling stability over 5000 cycles at 24 A g−1.

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DOI: 10.1039/C6RA27415C
Zitationen: 21
Web of Science
Zitationen: 20
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 2046-2069
KITopen-ID: 1000067040
HGF-Programm 37.01.01 (POF III, LK 01)
Erschienen in RSC Advances
Band 7
Heft 19
Seiten 11286–11296
Nachgewiesen in Web of Science
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