Journal
CRYSTENGCOMM
Volume 15, Issue 47, Pages 10222-10229Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ce41517a
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Funding
- National Research Foundation of Korea [2011-0015829]
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Two-dimensional (2D) reduced graphene oxide/titanium dioxide nanorod array/reduced graphene oxide (rGO/TiO2 NR/rGO) with a porous hybrid structure was fabricated as an electrode material for use in electrochemical supercapacitors. The structural, morphological, and compositional characteristics of the resulting electrode material were evaluated by using X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FE-SEM), and X-ray photoelectron spectroscopy (XPS). The electrochemical behavior of the as-prepared electrodes was characterized by using cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS) in 1 M Na2SO4 aqueous electrolyte. The maximum specific capacitance of this rGO/TiO2 NR/rGO electrode was 114.5 F g(-1) at a scan rate of 5 mV s(-1). The electrode exhibited high cycling stability, retaining over 85% of its initial capacitance after 4000 cycles. These results indicate that rGO/TiO2/rGO is a promising candidate for the electrode material in supercapacitor applications.
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