▎ 摘　　要

NOVELTY - Preparing graphene-aluminum composite material, comprises adding concentrated sulfuric acid, potassium permanganate, sodium nitrate, and graphite into beaker under an ice-water bath, stirring and dissolving, and placing in a sealed container, then adding deionized water, heating the system, and stirring and reacting, adding hydrogen peroxide, and filtering and washing, and placing graphene oxide slurry in a beaker, adding deionized water, ultrasonically dispersing, and maintaining in an ultrasonic state, placing spare aluminum powder in a three-necked flask, adding ethanol, then dropwise adding hydrazine hydrate, and heating to refluxing, adding graphene oxide dispersion into a three-necked flask, reflux stirring, filtering to obtain crude product, washing with ethanol, and drying to obtain final product. USE - The graphene-aluminum composite material is useful in combustion (claimed). ADVANTAGE - The material: has tightly coated graphene, which changes the shape of aluminum powder to a certain extent, increases the distance between aluminum particles, and improves storage reliability; increases the combustion efficiency of 20% due to coating and dispersion of graphene, which makes the aluminum powder react more completely; and deduces the combustion mechanism from the combustion products. DETAILED DESCRIPTION - Preparing graphene-aluminum composite material, comprises (1) adding concentrated sulfuric acid, potassium permanganate, sodium nitrate, and graphite into a beaker under an ice-water bath, stirring and dissolving, and placing in a sealed container for 24 hours, stirring at 35 ℃ for 30 minutes, then slowly adding 500 ml deionized water, slowly heating the system at 100 ℃, and stirring and reacting at 100 ℃ for 15 minutes, dropwise adding hydrogen peroxide, and filtering and washing to obtain graphene oxide slurry, and (2) (2a) placing the graphene oxide slurry in a beaker, adding deionized water, and then ultrasonically dispersing at 45 ℃ to obtain uniformly dispersed graphene oxide dispersion, and maintaining in an ultrasonic state, (2b) placing spare aluminum powder in a three-necked flask, adding ethanol, then dropwise adding hydrazine hydrate, and heating and refluxing, and (2c) heating the system at 90-95 ℃, slowly adding the graphene oxide dispersion obtained in step (2a) into a three-necked flask for 30 minutes, reflux stirring, and filtering to obtain crude product, washing for many times with ethanol, and drying in a vacuum oven to obtain final product.