▎ 摘　　要

NOVELTY - Preparation of porous graphene nanometre belt involves: reacting the multi-wall carbon nano tube, concentrated sulfuric acid and concentrated nitric acid to obtain a reaction solution, first heating the mixed reaction liquid to obtain the pre-oxidized carbon nano-tube; mixing the pre-carbon nano-tube and cleaning agent, drying and second heating to obtain the expansion of graphene nanometre belt; and mixing the graphite nano-belt with an activator for activating to obtain the porous graphene nanometre belt. USE - For preparation of porous graphene nanometre belt in the preparation of supercapacitors (claimed). ADVANTAGE - The preparation of porous graphene nanometer belt is simple. The prepared porous graphite nano-belt is provided with higher specific capacity.