▎ 摘　　要

NOVELTY - Preparing low-cost three-dimensional porous graphene material comprises e.g. (i) mixing the carbon precursor and solvent and adding into three-mouth flask, heating and stirring to dissolve; then adding additive and templating agent, introducing nitrogen gas, stirring and mixing, distilling off the solvent, taking out and drying, where the mass ratio between carbon precursor, additive and template agent is 1:10:10-10:1:1 and the mass of solvent is 1-5 times mass of carbon precursor, (ii) placing raw materials mixed in step (i) in an atmosphere furnace, then heating to a predetermined temperature, then insulating and cooling to room temperature to taking out, and (iii) pickling the carbonized product obtained in step (ii) in an acid solution, washing with water and alcohol to neutral, then placing in a vacuum oven at 40-100 degrees C for 1-12 hours to obtain final product. USE - The method is useful for preparing low-cost three-dimensional porous graphene material. ADVANTAGE - The low-cost three-dimensional porous graphene material: has a specific surface area of 300-1600 m2/g, a mesoporous content of 85-98 wt.%, a layer number of 1-10 layers and purity of 98-100%; and the method: has simple process and low cost; and is suitable for industrial production. DETAILED DESCRIPTION - Preparing low-cost three-dimensional porous graphene material comprises (i) mixing the carbon precursor and solvent and adding into three-mouth flask, heating and stirring to dissolve; then adding additive and templating agent, introducing nitrogen gas, stirring and mixing, distilling off the solvent, taking out and drying, where the mass ratio between carbon precursor, additive and template agent is 1:10:10-10:1:1 and the mass of solvent is 1-5 times mass of carbon precursor, (ii) placing raw materials mixed in step (i) in an atmosphere furnace, then heating to a predetermined temperature, then insulating and cooling to room temperature to taking out, where the carbonization process parameters are: heating rate of 1-25 degrees C/minute; predetermined temperature of 1200-1900 degrees C; the insulation time is 0.1-3 hours and the protective atmosphere is nitrogen gas or argon gas; and (iii) pickling the carbonized product obtained in step (ii) in an acid solution, washing with water and alcohol to neutral, then placing in a vacuum oven at 40-100 degrees C for 1-12 hours to obtain final product, where the pickling process parameters are: acid is hydrochloric acid, phosphoric acid, nitric acid, oxalic acid or sulfuric acid; the molar concentration of acid solution is 1-4 mol/l; the stirring time is 2-6 hours; and the stirring speed is 25-200 revolutions/minute.