TiO₂ nanorods decorated on RGO sheet for an excellent energy storage performance

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 (C_sp) 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.