Reduced graphene oxide-SnO₂-polyaniline ternary composite for high-performance supercapacitors

A novel symmetric supercapacitor electrode material, rGO-SnO₂-polyaniline nanocomposite, was synthesized using graphite oxide, SnCl₂.2H₂O, and pure Aniline as precursors in a scalable and straight forward one-pot process. Analysis revealed that the rGO-SnO₂-polyaniline composite had been successfully synthesized. When the two-electrode supercapacitor was assembled using 1M H₂SO₄, it showed an outstanding specific gravimetric capacitance of 524.2 F/g at a 5 mV/s scan rate. To the best of our knowledge, such a higher value for a two-electrode specific capacitance for a supercapacitor was never reported. Furthermore, even at a high current density of 1 A/g, the material disclosed an outstanding charge-discharge characteristic. Thus, the rGO-SnO₂-polyaniline nanocomposite could also be used as an electrode for commercial supercapacitors. (author)