Rational design of hierarchical carbon hybrid microassemblies via reductive-catalytic chemical vapor deposition

Carbon hybrids (CHs) with controllable synthesis and hierarchical structures have been considered as promising materials to satisfy the explosive energy consuming. Here, a novel strategy is demonstrated to design hierarchical CHs by reductive-catalytic chemical vapor deposition (RCCVD). The graphene oxide sheets self-assemble into microfiber skeleton during wet-spinning, combining with in situ growth of carbon hybrid nanofibers by the catalytic species from RCCVD. The derivatives from RCCVD exhibit diverse microstructures of nanocaps, nanofibers and nanorods under different synthesis temperatures. Ammonia (NH₃), hydrogen cyanide (HCN) and cyanic acid (HCNO) are released efficiently as the reductant by the synergy of ion-contained graphene oxide and melamine. The microassemblies display satisfactory performance as LIB anodes ascribed to the well-designed micro-nano hierarchical structures. This work provides a feasible strategy to synthesize functional carbon-based hierarchical assemblies.