▎ 摘　　要

NOVELTY - Preparing alkali metal rubidium-doped graphene composite material, comprises heating graphene to remove oxygen through introduction of nitrogen, placing 1,2-dimethoxyethane in a container, dispersing rubidium in 1,2-dimethoxyethane under magnetic stirring until complete dissolution, dispersing graphene in the above-mentioned rubidium-dissolved 1,2-dimethoxyethane and magnetic stirring to obtain rubidium-doped graphene dispersion, allowing to stand, layering rubidium-doped graphene dispersion, pouring upper clear solution, washing the remainder with ethanol, centrifuging and drying. USE - The method is useful for preparing alkali metal rubidium-doped graphene composite material (claimed). DETAILED DESCRIPTION - Preparing alkali metal rubidium-doped graphene composite material, comprises heating graphene under vacuum conditions to remove oxygen through introduction of nitrogen, placing 1,2-dimethoxyethane in a container as a reaction solvent, dispersing rubidium which is twice the amount of graphene in 1,2-dimethoxyethane under magnetic stirring until complete dissolution, dispersing graphene in the above-mentioned rubidium-dissolved 1,2-dimethoxyethane and magnetic stirring to obtain rubidium-doped graphene dispersion by the ionic bond interaction between the metal atom and the carbon atom, allowing to stand, layering the rubidium-doped graphene dispersion, pouring upper clear solution, washing the remainder with ethanol, centrifuging to remove weakly bound rubidium, and drying under vacuum to obtain stable rubidium-doped graphene composite material as a black powder form.