Supercritical fluid processing of nitric acid treated nitrogen doped graphene with enhanced electrochemical supercapacitance

Supercritical fluid assisted synthesis of N-doped graphene with nitric acid showed a enhanced specific capacitance of 261 F g⁻¹at 0.5 A g⁻¹and 126% capacitance retention was observed after 1000 cycles at 5 A g⁻¹due to cycling induced surface wetting.