Nitrogen/sulfur co-doped graphene networks uniformly coupled N-Fe2O3 nanoparticles achieving enhanced supercapacitor performance

N-Fe2O3/NSG composite has been successfully synthesized by an easily one-step hydrothermal method, in which N-Fe2O3 particles with 20-30 nm in size uniformly anchored on the surface of NSG sheet, and exhibits excellent charge/discharge stability and long-term cycling life (91.3% of capacitance retention after 5000 cycles).262