Three-dimensional (3D) graphene, featured by perfect intra-plane interconnections and substantial inter-plane separations of individual graphene blocks, are most desired for bringing unique 2D-crystal properties of graphene into the macro-world for large-scale applications. However, the current 3D graphene products still suffer from poor electrical conductivity, low surface area, and insufficient mechanical strength/elasticity; the interconnected self-supported reproducible 3D graphenes remain unavailable. Herein, we developed a novel chemical blowing approach to synthesize a new 3D graphene foam, i.e. strutted graphene (SG). SG consists of mono- /few-layered graphitic membranes tightly "glued", rigidly fixed and spatially scaffolded by micrometer-scale graphitic struts. Such topological configuration provides intimate structural interconnectivities, freeway for electron/phonon transports, huge accessible surface area, as well as robust mechanical properties. The directly grown high-yield and low-cost SG enables many specific applications at the kilogram-level scales and may effectively substitute for standard porous carbons as a functional additive. SG overcomes the drawbacks of all presently available 3D graphene products and opens up a wide horizon for diverse practical usages, e.g. high-power high-energy electrochemical capacitors [1]. Their supercapacitors achieve the maximum-power-density of 106 W/kg in aqueous system, and realize high energy density of 50 Wh/kg at the high maximum-power-density of 340 kW/kg in organic system [2].

Three-dimensional (3D) graphene, featured by perfect intra-plane interconnections and substantial inter-plane separations of individual graphene blocks, are most desired for bringing unique 2D-crystal properties of graphene into the macro-world for large-scale applications. However, the current 3D graphene products still suffer from poor electrical conductivity, low surface area, and insufficient mechanical strength/elasticity; the interconnected self-supported reproducible 3D graphenes remain unavailable. Herein, we developed a novel chemical blowing approach to synthesize a new 3D graphene foam, i.e. strutted graphene (SG). SG consists of mono- /few-layered graphitic membranes tightly "glued", rigidly fixed and spatially scaffolded by micrometer-scale graphitic struts. Such topological configuration provides intimate structural interconnectivities, freeway for electron/phonon transports, huge accessible surface area, as well as robust mechanical properties. The directly grown high-yield and low-cost SG enables many specific applications at the kilogram-level scales and may effectively substitute for standard porous carbons as a functional additive. SG overcomes the drawbacks of all presently available 3D graphene products and opens up a wide horizon for diverse practical usages, e.g. high-power high-energy electrochemical capacitors [1]. Their supercapacitors achieve the maximum-power-density of 106 W/kg in aqueous system, and realize high energy density of 50 Wh/kg at the high maximum-power-density of 340 kW/kg in organic system [2].