Tuning the Wrinkles in 3D Graphene Architectures for Mass and Electron Transport

Due to the high in-plane Young's modulus and defects, graphene is prone to deformations such as wrinkles. The effects of wrinkles on the mass and electron transport properties need to be elucidated as graphene has great potential in applications such as catalysis, sensors, energy storage, and conversion. In this paper, the wrinkling of graphene oxide sheets is dominated by the mass ratio of graphene oxide to N , N ′-dicyclohexylcarbodiimide (DCC) to fabricate 3D graphene architectures (TDGAs) with tunable porosity. This template-free DCC tactic of regulating the wrinkling procedure forms hierarchical porosity and modulates the exposure of defect sites. Considering the confinement effect of the wrinkles and defect sites, orthorhombic phase Nb 2 O 5 ( T -Nb 2 O 5 ) nanoparticles are loaded onto TDGAs, and as-obtained T -Nb 2 O 5 @TDGAs composites exhibit favorable properties of Li-ion and electron transport after the wrinkle structures are optimized. The DCC tactic manifests excellent performance in manipulating mass transport properties through tuning the wrinkles on TDGAs-based composites, which may greatly contribute to graphene based materials with high performances in energy storage.