Abstract
Herein, we report nanocomposite of titanium dioxide (TiO2) nanorods decorated reduced graphene oxide (TiO2/RGO) nanocomposite prepared using the simple, one-pot hydrothermal route for electrode material in supercapacitor applications. A systematic comparison study was carried out for the TiO2 nanorods coated on graphite foil in presence of alkaline media 3 M KOH, NaCl, and Na2SO4 using the three-electrode method. The TiO2/RGO composite shows an excellent specific capacitance (Csp) of 330 Fg-1 at the discharge current density 0.5 Ag-1 in presence of 3 M KOH electrolyte solution. The obtained highest specific capacitance values in order by various electrolytes are observed as KOH > NaCl > Na2SO4. The long-term cycle stability of charge and discharge cycle at current density 0.5 Ag-1 over 1000 cycles and only 8% decay in the specific capacitance of TiO2/RGO nanocomposite was observed in 3 M KOH electrolyte. The improved electrochemical performance TiO2/RGOcomposite in presence of KOH electrolyte is shown to be the most suitable electrode for the supercapacitors.
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•Novel binary TiO2/RGO composite was prepared through a facile hydrothermal method.•The materials structural, morphological and elemental composition confirmed using XRD, TEM and EDAX techniques.•The electrochemical properties TiO2/RGO electrodes were studied in 3 M KOH electrolyte solution.•Pure TiO2 NRs and TiO2/RGO electrodes exhibit higher Csp about 142 and 330 Fg-1 at 0.5 Ag-1 current density.•The capacitance was retained at 92.0% after 1000 charge-discharge cycles at 0.5 A g−1.