▎ 摘　　要

Nanohole graphene oxide (NHGO) was obtained in a homogeneous aqueous mixture of graphene oxide (GO) and H2O2 at 120 degrees C. Supercapacitors were fabricated as the electrode material by using NHGO. A specific capacitance of 240.1 F g(-1) was obtained at a current density of 1 A g(-1) in 6 m KOH electrolyte and specific capacitance remained 193.6 F g(-1) at the current density of 20 A g(-1). This was attributed to reducing the inner space between the double-layers, enhanced ion diffusion and large specific surface area. Supercapacitor prepared with NHGO electrodes also exhibited an excellent cycle stability. (C) 2016 Elsevier B.V. All rights reserved.