▎ 摘　　要

NOVELTY - Preparing three dimensional porous graphene, comprises dispersing graphene oxide in strong base water solution to obtain dispersion liquid, carrying out pre-drying process on obtained dispersed liquid at 80 degrees C to obtain slurry, heating obtained slurry at 120-1200 degrees C under a vacuum or inert gas or reducing gas atmosphere for 1-20 hours, neutralizing the heated mixture, filtering the mixture, and washing the filtrate and then drying. USE - The method is useful for preparing three dimensional porous graphene (claimed), which is useful as electrode material of supercapacitor. ADVANTAGE - The method provides three dimensional porous graphene with improved specific surface area thus improving electrochemical performance of the supercapacitor.