Carbon foam is a representative of porous-structured carbon material. It has attracted increasing attention from The researchers because of its unique 3D porous structure and excellent performance, such as low density with high mechanical strength, high electrical conductivity, tailorable thermal conductivities, high adsorption, electromagnetic shielding, ablation resistance, and large surface area[1]. They are expected to make special contributions to modern technology as containers of active materials for thermal energy storage, electrodes for electrochemical devices and electrical energy storage, absorbers of large molecules, and other applications including microwave absorption. Their preparation processes are discussed by classifying into five, blowing and carbonization, template carbonization, compression of exfoliated graphite, assembly of graphene nanosheets and others. Through these processes, density of the foam, sizes of cells and windows, as well as physical properties, are successfully controlled[2].
