▎ 摘 要
3D construction of 2D sheets is the key to the utilization of graphene for large scale industrial applications. The layer by layer approach of additive manufacturing enables a high degree of design freedom for the fabrication of 3D graphene structures with excellent mechanical flexibility. Herein, the excellent mechanical and functional properties of 3D nitrogen-doped graphene (NG) foams fabricated is demonstrated via 3D printed templates and template-directed chemical vapor deposition. The super-elastic foam, consisting of interconnected networks of graphene sheets can make near complete strain recovery from load up to 62500 times its own weight, with extraordinary damage tolerance at a low density of 9.5 mg cm(-3). Fast transport of charge carriers (5 S cm(-1)) highlights the potential of the NG foam for use in various functional applications. Observed temperature-invariant reversible elasticity from -196 to 300 degrees C further emphasizes its value for use in demanding environments.