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Hydrothermal synthesis of RuO 2.xH 2O/graphene hybrid nanocomposite for supercapacitor application
- Jaidev, Razack Imran Jafri,
Published in
2011
Abstract
Herein we report a facile approach for synthesis of well dispersed hydrated ruthenium oxide nanoparticles onto the surface of hydrogen exfoliated graphene (HEG) sheets via hydrothermal synthesis route. The as prepared hybrid nanocomposite (RuO 2·xH 2O/HEG) was characterized by X-ray diffraction analysis (XRD), field emission scanning electron microscopy (FESEM) and high resolution transmission electron microscopy (HRTEM). A symmetrical supercapacitor was fabricated and the electrochemical performance of this model supercapacitor cell was investigated by cyclic voltammetry (CV), chronopotentiometry (CP) and impedance spectroscopy (EIS) in 1.0 M H 2SO 4 solution. The hybrid nanocomposite shows a maximum specific capacitance of 154 F/g and energy density of about 11Wh/kg at a specific discharge current of 1 A/g (20 wt% Ru loading). The composite also shows a maximum power density of 5 kW/kg and coulombic efficiency of 97% for a specific discharge current of 10 A/g. © 2011 IEEE.
About the journal
Journal2011 International Conference on Nanoscience, Technology and Societal Implications, NSTSI11
Open AccessNo
Concepts (32)
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    CHRONOPOTENTIOMETRY
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    Coulombic efficiency
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    Discharge currents
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    Electrochemical performance
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    Energy density
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    Field emission scanning electron microscopy
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    Hybrid nanocomposites
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    Hydrothermal
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    Impedance spectroscopy
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    MAXIMUM POWER DENSITY
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    PSEUDOCAPACITANCE
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    RUTHENIUM OXIDE
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    Specific capacitance
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    Super capacitor
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    Supercapacitor application
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    Well-dispersed
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    XRD
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    Capacitors
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    Cyclic voltammetry
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    Electrochemical impedance spectroscopy
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    Field emission microscopes
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    Graphene
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    High resolution transmission electron microscopy
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    Hydrogen
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    Nanocomposites
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    NANOSCIENCE
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    Ruthenium
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    Ruthenium alloys
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    Ruthenium compounds
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    Scanning electron microscopy
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    X ray diffraction analysis
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    Hydrothermal synthesis