TiO2 nanorods decorated on RGO sheet for an excellent energy storage performance. (26th April 2022)

• Record Type: Journal Article
• Authors: Godlaveeti, Sreenivasa Kumar; Maseed, Hussen; Shaik, Dadamiah PMD.; Al-Ammar, Essam A.; Tighezza, Ammar Mohamed; Sillanpaa, Mika; Somala, Adinarayana Reddy; Nagireddy, Ramamanohar Reddy
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 35(2022)
• Page Start: 15571
• Page End: 15582
• Publication Date: 2022-04-26
• Subjects: Hydrothermal -- Graphene -- TiO2 nanorods -- Graphite foil -- Supercapacitor; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.03.071
• Languages: English
• ISSNs: 0360-3199

Abstract

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 Na2 SO4 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 > Na2 SO4 . 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. Graphical abstract: Image 1 Highlights: 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 .