▎ 摘　　要

NOVELTY - Mesoporous graphene powder preparation involves mixing metal magnesium powder and magnesia powder uniformly to obtain mixed powder, and then placing in a sealed pressure-resistance container. A tungsten filament coil is embedded in the mixed powder, where carbon dioxide gas is filled into the sealed pressure resistance container. The direct current power is applied to the filament coil for 5-30 seconds. The metal magnesium powder reacts with carbon dioxide for 1-2 minutes to obtain black powder. USE - Method for preparing mesoporous graphene powder (claimed). ADVANTAGE - The method prepares the mesoporous graphene powder in a simple, cost-effective and eco-friendly manner with high yield and excellent capacitance performance and electrochemical stability. DETAILED DESCRIPTION - Mesoporous graphene powder preparation involves mixing metal magnesium powder and magnesia powder uniformly to obtain mixed powder, and then placing in a sealed pressure-resistance container. A tungsten filament coil is embedded in the mixed powder, where carbon dioxide gas is filled into the sealed pressure resistance container. The direct current power is applied to the filament coil for 5-30 seconds. The metal magnesium powder reacts with carbon dioxide for 1-2 minutes to obtain black powder, where the obtained black powder is mixed with diluted acid solution to obtain the mesoporous graphene powder. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic scanning electron microscope photograph of the mesoporous graphene powder.