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http://bura.brunel.ac.uk/handle/2438/19600
Title: | Electron Beam Induced Synthesis of Ru-rGO and its Super Capacitive Behavior |
Authors: | Saykar, N Phatangare, A Banerjee, I Bhoraskar, V Ray, A Mahapatra, S |
Keywords: | electron beam irradiation;supercapacitor;Ru-rGO |
Issue Date: | 16-Aug-2019 |
Publisher: | IOP Publishing |
Citation: | 2D Materials, 2019, 6(4) 045030 (12) |
Abstract: | We report an in situ synthesis of ruthenium-reduced graphene oxide (Ru-rGO) using 6 MeV electron beam assisted radiolytic reduction method and its supercapacitive behavior. X-ray diffraction (XRD), transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM) explore Ru nanoparticles of size ~2 nm are decorated on rGO sheets. Raman spectroscopy shows I D/I G ratio increased and formation of bilayer rGO after electron beam irradiation. The defect density in Ru-rGO is increased due to the electron beam irradiation as compared to its counterpart GO. The Ru-rGO based supercapacitor exhibits specific capacitance (128.1 ± 5.59) F g−1 at 10 mV s−1 scan rate. The specific capacitance retention of Ru-rGO is up to 99.4% at 900 cycles while it increases to 130% at 5000 cycles. Discharge curve of the supercapacitor involves three current decay processes viz. activation polarization, ohmic polarization and concentration polarization. The highest energy density of (4.125 ± 0.19) W h kg−1 and power density of 1.44 kW kg−1 are achieved with Ru-rGO supercapacitor. This unique electron beam assisted techniques illustrates a promising method of the fabrication of high performance supercapacitor. |
URI: | https://bura.brunel.ac.uk/handle/2438/19600 |
DOI: | https://doi.org/10.1088/2053-1583/ab3304 |
ISSN: | 2053-1583 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
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