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Graphene oxide (GO) is the most widely used precursor for graphene materials because of its excellent processibility and unique solution chemistry. In a GO solution, the solvent provides a specific chemical environment to affect the conversion of GO into graphene materials. Herein, we report that organic solvents are good media for producing graphene materials with improved properties. Particularly,...
High specific surface area (SSA), especially effective specific surface area (E-SSA) of the active electrode materials is required for high performance supercapacitors. In this work, such materials (e.g. AC-KOH) were obtained using a scalable industrial method from biomass waste material, with controlling the pore size distribution and mesopores as the major contribution. Thus, an electrode material,...
Two-dimensional poly(triazine imide) nanosheets have attracted increasing attention due to the diverse functionalities, however, it remains a challenge to synthesize poly(triazine imide) nanosheets directly from molecular monomers. Here, a novel bottom-up ionothermal method of high efficiency was developed for the synthesis of ultrathin amorphous poly(triazine imide) (aPTI) nanosheets from molecular...
Graphene oxide (GO) sheets with desired sizes and narrow size distribution were synthesized via a modified Hummers method by using sieved graphite flakes as the starting materials. This method outweighs previous post-synthesis fractionation methods in efficiency and scalability; thus it is more promising for large-scale synthesis of size-controlled GO. The as-prepared GO suspensions exhibited size-dependent...
Carbon materials, including pyrolytic carbon and nanocarbon, especially graphene, have been reported to be introduced in the SnO2-based anodes to decrease the capacity decay during cycling, but the capacity fading was not effectively suppressed. Herein, we report a three-dimensional cross-linked graphene material as the template to load electrochemically active material SnO2. A 3D composite of graphene...
Fluorinated graphene, which combines the unique properties of graphite fluoride and graphene, has attracted considerable attention in recent years. Here, we developed a facile, efficient, and scalable method for high-yield exfoliation of graphite fluoride into fluorinated graphene (fluorographene) nanosheets. The exfoliation approach consists of solid ball milling of graphite fluoride with ammonia...
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