▎ 摘　　要

Graphene with a unique two-dimensional lamellar structure is considered an attractive carbon-based electrode material for supercapacitors. However, the actual electrochemical performance of graphene-based supercapacitors is far below the theoretical level. In this work, reduced graphene oxide aerogels co-doped with different amounts of nitrogen and sulfur (N/S-rGAs) were prepared via a one-pot hydrothermal approach using trithiocyanuric acid as a doping agent. Characterization of the materials showed that the optimal N/S-rGA had a high sulfur content (4.1 at%) and an interconnected porous network structure that provided accessible diffusion channels for electrolyte ions, thus leading to low ion diffusion resistance. The optimal N/S-rGA displayed high electrical conductivity of 11.5 S cm(-1) and a specific capacitance of 180.5 F g(-1) at 1 A g(-1). This N/S-rGA delivered a high energy density of 75 Wh kg(-1) at a power density of 0.9 kW kg(-1) in an ionic liquid (1-ethyl-3-methyl-imidazolium tetrafluoroborate, EMIMBF4) electrolyte, and its energy density was still 33 Wh kg(-1) when its power density was 15 kW kg(-1). Consequently, N/S-rGAs are promising electrode material for high-performance ionic liquid-based supercapacitors.