▎ 摘　　要

NOVELTY - The preparation method of porous nitrogen-doped graphene nanomaterial involves (1) taking urea and glucose as raw material, and ionic liquid as template, mixing, uniformly grinding, placing the raw materials into a crucible in a muffle furnace, and calcining at 500-600 degrees C, and (2) placing graphitic carbon nitride obtained in step (1) into a tubular furnace, and calcining under high temperature nitrogen atmosphere at 700-900 degrees C. USE - Preparation method of porous nitrogen-doped graphene nanomaterial for supercapacitor electrode material (claimed). ADVANTAGE - The method enables preparation of porous nitrogen-doped graphene nanomaterial with high specific surface area, uniform porous structure, high energy storage electrochemical activity, and excellent repeatability, in short period, by simple, economical and industrial process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for porous nitrogen-doped graphene nanomaterial.