However, there are still challenges to face for grapheneapplications in metal composites, due to reasons including anagglomeration tendency in liquids, and poor wettabilitybetween graphene and metal, which cause difficulties in thepreparation of high performance metal/graphene composites.Therefore, up to now, there are few works on metal/graphenecomposites and complex preparation methods with low costs.Electrochemical deposition22and laser physical vapordeposition23have been proven capable of realizing uniformdispersion of reduced graphene oxide (RGO) in a metal matrixfor preparation of metal/graphene composite lms. Z. Li et al.24successfully prepared aluminum/RGO composites and foundthat a composite reinforced with only 0.3 wt% of RGO showedan 18 and 17% increase in the elastic modulus and hardness,respectively. They rstly achieved uniform distribution of RGOin an Al matrix via simple electrostatic interaction betweengraphene oxide (GO) and Al akes, and a densied RGO/Alcomposite was obtained by hot pressing the RGO/Alcomposite powders.