▎ 摘　　要

A two-step method consisting of solid-state microwave irradiation and heat treatment under NH3 gas was used to prepare nitrogen-doped reduced graphene oxide (N-RGO) with a high specific surface area (1007m(2)g(-1)), high electrical conductivity (1532Sm(-1)), and low oxygen content (1.5wt%) for electrical double-layer capacitor applications. The specific capacitance of N-RGO was 291Fg(-1) at a current density of 1Ag(-1), and a capacitance of 261Fg(-1) was retained at 50Ag(-1), which indicated a very good rate capability. N-RGO also showed excellent cycling stability and preserved 96% of the initial specific capacitance after 100000cycles. Near-edge X-ray absorption fine-structure spectroscopy results provided evidenced for the recovery of conjugation in the carbon networks with the removal of oxygenated groups and revealed chemical bonding of the nitrogen atoms in N-RGO. The good electrochemical performance of N-RGO is attributed to its high surface area, high electrical conductivity, and low oxygen content.