▎ 摘　　要

NOVELTY - Preparing three-dimensional porous graphene involves adding crosslinking agent into the graphene oxide dispersion liquid at 120-180 degrees C for hydro-thermal reaction at 10-25 degrees C for 8-10 hours to obtain the mixed solution, adding lauryl amine into the mixed solution, uniformly stirring, then adding ammonium bicarbonate and ammonium nitrate, slowly stirring for 0.5-1 hours, then freezing and drying for 1-2 days. The material is taken out, dried in reducing atmosphere of 200-300 degrees C for pre-burning for 12-24 hours, then the temperature is raised to 500-700 degrees C for 3-5 hours, and cooled. USE - Method for preparing three-dimensional porous graphene used in battery material (claimed). ADVANTAGE - The method enables to prepare three-dimensional porous graphene which has large specific surface area, lap joint stability and high conductivity. It improves cell energy density and safety of use. DETAILED DESCRIPTION - Preparing three-dimensional porous graphene involves adding crosslinking agent into the graphene oxide dispersion liquid at 120-180 degrees C for hydro-thermal reaction at 10-25 degrees C for 8-10 hours to obtain the mixed solution, adding lauryl amine into the mixed solution, uniformly stirring, then adding ammonium bicarbonate and ammonium nitrate, slowly stirring for 0.5-1 hours, then freezing and drying for 1-2 days. The material is taken out, dried in reducing atmosphere of 200-300 degrees C for pre-burning for 12-24 hours, then the temperature is raised to 500-700 degrees C for 3-5 hours, and cooled to obtain the three-dimensional porous graphene. The dispersion of graphene oxide and crosslinking agent are mixed with dodecyl dimethyl amine, ammonium bicarbonate and ammonium nitrate in mass ratio of 40-70:5-10:1-5:1-5:1-5.