A graphene nanosheet and a manufacturing method therefor and, more particularly, to a water-dispersible graphene nanosheet and a manufacturing method therefor. The water-dispersible graphene nanosheet of the present invention is characterized in that at least a part of the end portion of a basal plane is sulfated.

A weakly coupled enhanced graphene film includes an enhanced graphene structure based on weak coupling, wherein the enhanced graphene structure based on weak coupling comprises a plurality of graphene units stacked vertically; the graphene unit is a single graphene sheet, or consists of two or more graphene sheets stacked in AB form; two vertically adjacent graphene units are weakly coupled, to promote the hot electron transition and increase the joint density of states, thereby increasing the number of hot electrons in high-energy states; the stacking direction of the graphene units in the graphene structure is in the thickness direction of the graphene film; and the graphene film enhances the accumulation of hot electrons in high-energy states by the enhanced graphene structure based on weak coupling.

Various embodiments provide a zinc oxide graphene composite. A zinc oxide graphene composite includes zinc oxide crystallites and graphene. A method of forming the composite includes combining graphene and zinc oxalate to form a mixture and heating the mixture to produce the zinc oxide graphene composite.

A nanocarbon material includes agglomerate nanostructures made of aggregates of: (i) graphene nanostructures having at least partially crumpled morphology, and (ii) clusters of at least one carbon material. The carbon material may have a graphitic structure. At least a portion of the graphitic structure may be at least partially hollow and have at least one winged protrusion. Optionally, the nanocarbon material may be part of a composition that includes a dispersion medium or a cementitious material. Methods of making such a composition are also disclosed.

The present disclosure relates to a graphene-nanoflower shaped MXene composite material, preparation method and application thereof, which belongs to the field of negative electrode materials for supercapacitors. In the present disclosure, a space-time shaping femtosecond laser is utilized to process MXene target in graphene oxide nanoflake dispersion, so as to synthesize a graphene-nanoflower shaped MXene composite material in one-step. This nanoflower shaped MXene has adjustable size and morphology and an extremely large specific surface area; when it is used in an electrode material for supercapacitors, the supercapacitor exhibits an extremely high specific capacitance and good cycle stability. This method utilizes a space-time shaping femtosecond laser to synthesize the graphene-nanoflower shaped MXene composite material, which is highly controllable, and can be used to uniformly prepare the material in large-scale. It has provided a new way for synthesis of materials.

Graphene based sensor technology is described. Certain aspects relate to graphene containing ink formulations suitable for fabricating sensor electrodes via inkjet printing methods and to sensor electrodes produced from such ink formulations. Certain further aspects relate to processes for fabricating functionalized graphene materials for use in such ink formulations. Further still, certain aspects relate to sensors comprising graphene sensor electrodes.

Several variations of synthetic carbon materials are disclosed. The materials can assume a variety of properties, including high electrical conductivity. The materials also can have favorable structural and mechanical properties. They can form gas impenetrable barriers, form insulating structures, and can have unique optical properties.

The present development is a novel graphene foam with highly enriched incommensurately-stacked layers. The graphene foam is intended to be applied as active electrodes in rechargeable batteries. A 93% incommensurate graphene foam demonstrated a reversible specific capacity of 1540 mAh g.sup.−1 with a 75% coulombic efficiency, and an 86% incommensurate sample achieves above 99% coulombic efficiency exhibiting 930 mAh g-1 specific capacity.

A method for preparing artificial graphite includes (A) preparing heavy oil, and forming coke from the heavy oil through continuous coking reaction such that the coke has a plurality of mesophase domains, wherein a size of the mesophase domains ranges between 1 and 30 μm by polarizing microscope analysis; and (B) processing the coke formed by step (A) sequentially by pre-burning carbonization treatment, grinding classification, high-temperature carbonization treatment and graphitization treatment to form polycrystalline artificial graphite from the coke. The method for preparing artificial graphite of the present invention and the polycrystalline artificial graphite prepared thereby are applicable to batteries.

A method for continuously mass-manufacturing graphene using thermal plasma, the method for continuously mass-manufacturing graphene includes the steps of: (a) injecting an inert gas into a plasma device to generate plasma; (b) injecting expandable graphite and graphite intercalation compounds (GIC) into the plasma device in constant amounts; and (c) allowing the expandable graphite and GIC to be expanded by thermal plasma treatment so that graphene is exfoliated.