▎ 摘　　要

NOVELTY - Graphene composite material is uniformly coated on sponge surface to form graphene micro chip which is tightly connected with the sponge. The mass percentage of the graphene composite material is 15-85%. USE - Graphene composite material used as electromagnetic shielding material in electronic device. ADVANTAGE - The graphene composite material has good flexibility and elasticity, has effective electromagnetic shielding property, increases reliability of electric products, and prolongs use life of product. The graphene composite material is prepared in cost-effective and highly efficient manner, and suitable for industrial production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene composite material, which involves: (A) soaking the sponge in graphene solution, then added with surface active agent solution for 5-30 minutes, then taken out; and (B) drying the sponge, then coated with graphene by spraying or dipping, then dried at 30-150 degrees C for 0.5-5 hours to obtain finished product.