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Since its discovery, graphene’s advantages such as high electron mobility, good thermal stability, high tensile strength, and low resistivity have made it promising for use in coatings. 1 Introduction to Graphene Graphene is a novel two-dimensional material in the form of a single-layer sheet composed of carbon atoms; it is a flat film with a hexagonal, honeycomb-like lattice structure formed by carbon atoms using sp2 hybridized orbitals. It is the basic building block for forming zero-dimensional fullerenes, one-dimensional carbon nanotubes, and three-dimensional graphite. The unique structure of graphene endows it with many excellent physical and chemical properties: its electron mobility at room temperature can reach 2×10^5 cm²/(V·s), the stiffness of single-layer graphene is 300–400 N/m, its thermal conductivity can reach 5,300 W/(m·K), and the light transmittance of graphene with 5 or fewer layers is greater than 90%. These excellent properties of graphene make it suitable for the development of high-performance composite materials. 2 Applications of graphene in coatings: Graphene materials exhibit unique properties and functions in fields such as electronics, optics, biology, sensors, and energy storage. The various outstanding physical and chemical properties of graphene have also drawn widespread attention in the coating industry to the use of graphene materials in coatings, leading to extensive research efforts in this area.