▎ 摘　　要

NOVELTY - The method involves (a) irradiating a carbon source base film under an air atmosphere to obtain a graphene-based film, (b) dropping a dispersion liquid containing a metal complex to a surface of the graphene-type film, and drying to obtain the graphene film loaded with metal complex, where the metal complex is a metal-metal complex with a macrocyclic conjugated structure, and (c) irradiate the surface of graphite alkenyl film of the load metal complex under the air atmosphere using carbon dioxide laser. USE - Method for preparing metal single-atom modified graphene material, which is useful in lithium sulphur battery (all claimed). ADVANTAGE - The metal single-atom modified graphene material is rich in vacancy and topology defect, with three-dimensional fluffy foam structure, and the lattice graphene doped with metal single atom coordination structure, the specific structure can be used as modified material for modification of lithium-sulphur battery membrane. The preparation method has low cost, simple step, fast and high efficiency, universality, and can successfully realize the preparation of metal-single-atom-modified material graphene. DESCRIPTION OF DRAWING(S) - The drawing shows a photo graph view of a metal single-atom modified graphene material.