▎ 摘　　要

As the electromagnetic environment becomes increasingly deteriorated and complex, there is an increasing ur-gency for electromagnetic wave absorbing materials with thin, light, and wide strength characteristics. Graphene-based composites are considered candidates for the next generation of microwave absorbing materials. To realize the large-scale preparation of graphene-based materials, we utilize a modified salt template assisted pyrolysis method and innovatively chose iron phthalocyanine as the carbon source to prepare Fe@graphene. KCl cubic templates are prepared using an anti-solvent method, and iron phthalocyanine is pyrolyzed on the surface to form graphene and loaded with Fe particles in situ. The prepared Fe@graphene achieves extremely excellent electromagnetic wave absorption performance, with an effective absorption bandwidth of 7.9 GHz at a filling level of only 1 wt%. The effect of material dispersion and cubic structure is also investigated in this paper using finite element simulation.