▎ 摘　　要

NOVELTY - Preparing graphene mesh material comprises mixing nano calcium carbonate and potassium hydroxide, grinding, mixing, adding resulting mixture into beaker equipped with anthracene oil, adding N,N-dimethylformamide, stirring mixture to obtained reactant; transferring obtain reactant into corundum porcelain boat, placing corundum porcelain boat in tube furnace under an argon atmosphere, heating, raising tube furnace temperature, cooling to room temperature, subjecting resulting product to pickling, washing and drying to obtain graphene mesh material. USE - The material is useful as super capacitor for mutually connecting and rolling (claimed), and in BMIMPF6 ionic liquid electrolyte. ADVANTAGE - The super capacitor has current density of 0.05 A/g, specific volume of 256 F/g and high energy density up to 143 Wh/kg. DETAILED DESCRIPTION - Preparing graphene mesh material comprises (i) mixing nano calcium carbonate and potassium hydroxide, grinding and mixing, adding resulting mixture into beaker equipped with anthracene oil, adding N,N-dimethylformamide, stirring mixture until uniform to obtained reactant, where the mass ratio of anthracene oil, nano calcium carbon and potassium hydroxide total mass is 1/3, the mass ratio of anthracene oil and potassium hydroxide is 1/2, the mass ratio of N,N-dimethylformamide and carbon nano calcium is 17/90; (ii) transferring obtain step (i) reactant into corundum porcelain boat, placing corundum porcelain boat in tube furnace under an argon atmosphere, heating to 550 degrees C at constant for 30 minutes, raising tube furnace temperature to 850-1000 degrees C at constant for 60 minutes, cooling to room temperature, subjecting resulting product to pickling, washing and drying to obtain graphene mesh material.