Facile synthesis of TiO₂/rGO neatly electrodeposited on carbon fiber applied as ternary electrode for supercapacitor

A direct and quick approach to performer rGO (reduced graphene oxide) and TiO 2 (titanium oxide) depositions using electrochemical techniques to reduce GO on CF substrate (rGO/CF) with subsequent TiO 2 nanoparticles electrodeposition to produce ternary nanocomposites TiO 2 /rGO/CF is presented. A new bath solution consisting of titanium chloride, H 2 O 2 and supporting salt LiClO 4 was develop in order to simplify and reduce the preparation time of TiO 2 synthesis. Scanning electron microscopy images showed irregular and flakes-like shape aggregates with high particle density on CF substrate characteristic of rGO morphology. Homogeneous distribution of TiO 2 nanoparticles on TiO 2 /rGO/CF surfaces were observed on graphene sheets without modifying their morphologies. The CV curves presented a quasi-rectangular shape, indicating that the charge storage occurs preferentially through of the TiO 2 /rGO/CF electric double layer. Galvanostatic tests showed the highest time of the charge/discharge for TiO 2 /rGO/CF_5 sample, probably attributed to its surface area increase, improving its charge storage capacity. These results assured that TiO 2 /rGO/CF ternary composite has great potential as new electrode for supercapacitor application.