Improving the Electrochemical Performance of Hybrid Supercapacitor using Well-organized Urchin-like TiO2 and Activated Carbon

Abstract TiO 2 of various morphologies was synthesized by a hydrothermal method. Among them, urchin-like TiO 2 exhibited the largest BET [Brunauer–Emmett–Teller] specific surface area. In this paper, the full-cell was fabricated using Urchin-like TiO 2 as negative electrode and the activated carbon as positive electrode and measured electrochemical properties for cell balancing of cylindrical hybrid supercapacitors. The hybrid supercapacitor using urchin-like TiO 2 with a large specific surface area had a discharge-specific capacitance of 61.1 Fg −1 and excellent cycle life. Also, the hybrid supercapacitor with an urchin-like TiO 2 negative electrode showed a maximum power density of 12224.356 W kg −1 at an energy density of 10.134 Wh kg −1 and maximum energy density of 50.648 Wh kg −1 at a power density of 194.412 W kg −1 . Thus, urchin-like TiO 2 showed potential as a material for the negative electrode of hybrid supercapacitors.