The self-healing by electricity has certain requirement for the material, such as good electrical conductivity. Even so, these materials have great potential applications in the field of electronic devices. Hence, graphene based self-healing material with excellent electrical conductivity has been prepared by Huang Y et al. [7]. Namely, a novel self-healing material was fabricated with few-layer graphene (FG) and thermoplastic polyurethane (TPU), with repeatable self-healing via electricity with excellent healing efficiencies higher than 98%, finished by the wetting, diffusion and re-entanglement of the TPU chains. Moreover, Gao et al. [80] reported an efficient solder-free approach to weld individual macroscopic graphene assemblies via electrical Joule heating. Fig. 12 schematically shows the experimental setup and results for the welding of graphene films (GFs) that were chemically reduced by hydroiodic acid (GF-HI). The welded graphene film shows strong joint strength and significantly enhanced electrical conductivity while maintaining their structural integrity. The robust welding behavior is attributed to the bridging covalent bonds formed at the interface of two graphene films with structural defects. This simple yet effective welding technique opens the avenue to direct construct carbon assemblies into well-designed architectures.(III)Catalysts