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.
Yan Gao,Yanan Wang,Yujie Cao,Yajie Hu,Guantao Wang,Mingguang Han,Sida Luo
Macroscopic 3D-controllable graphene (3D-CG) architectures not only retain the intrinsic properties of graphene sheets but also exhibit structural advantages for pollutant adsorption and energy storage. This paper proposes a novel hybrid powder-based additive manufacturing method to fabricate 3D biomass-derived laser-induced graphene (3D B-LIG) structures with customizable geometries and microporous features. This method utilizes two waste sources as feedstock precursors for sustainable graphene production: “black liquor” (sodium lignosulfonate, NaLS) and “white pollution” (polypropylene, PP). Employing a computer-aided design process, this method allows for the synchronous creation of various freeform macrostructures, with either identical or variable sections. To optimize the formability and processing efficiency of 3D B-LIG, systematic studies have been conducted. These studies establish the relationship between processing parameters and the resulting structures by controlling the laser parameters and the mixing ratio of NaLS and PP. By leveraging tunable microporous structures with a maximized specific surface area of 485.3 m 2 g −1 , 3D B-LIG demonstrates exceptional performance in pollutant adsorption (with a maximum adsorption capacity of 283.3 mg g −1 for methylene blue) and energy storage (with a gravimetric specific capacitance value of 194.9 F g −1 ).
危险品化学品经营许可证（带存储）