Supercapacitors with unique performance have been widely utilized in many fields.Herein,we report a nitrogen and sulfur co-doped graphene aerogel (N/S-GA-2) prepared using a low toxic precursor for high-performance supercapacitors.The as-obtained material possesses a hierarchically porous structure and a large number of electrochemical active sites.At a current density of 1 A g-1,the specific capacitance of the N/S-GA-2 for supercapacitors with the ionic liquid as the electrolyte is 169.4 F g-1,and the corresponding energy density is 84.5 Wh kg-1.At a power density of 8.9 kW kg-1,the energy density can reach up to 75.7 Wh kg-1,showing that the N/S-GA-2 has an excellent electro-chemical performance.Consequently,the N/S-GA-2 can be used as a promising candidate of electrode materials for supercapacitors with high power density and high energy density.