An object of the present invention is to provide a member and a method for producing a fibrous carbon nanohorn aggregate with high efficiency. According to an embodiment of the present invention, there is provided a carbon nanohorn aggregate production member for producing a fibrous carbon nanohorn aggregate in which single-walled carbon nanohorns are aggregated radially and are connected in a fibrous form, comprising: a target fixing jig having a target housing section on an upper surface which has a partition and is capable of mounting a plurality of rod-shaped catalyst-containing carbon targets without making a mutual contact, and a jig guide for movement on a side surface; a jig for target fixing jig movement which is slidably engaged with the jig guide for movement; and a target fixing jig guide which is inclined downward, and is equipped with a guide rail which is adapted to an arrangement of the plurality of rod-shaped catalyst-containing carbon targets, wherein the target fixing jig is slidably engaged with the guide rail, and moves in a downward direction by a weight thereof and in a transverse direction along the guide rail by the jig for target fixing jig movement.

The present invention provides an electrode that is excellent in conductivity and improves the power density and energy density of a power storage device, a method for manufacturing the same, and a power storage device using the same. The electrode of the present invention is an electrode containing at least a graphene aggregate having a particle diameter of 0.1 μm or more and less than 100 μm, wherein the graphene aggregate is an aggregate of graphene basic structures each having graphene layers among which a fibrous material is located. A method for manufacturing the electrode of the present invention comprises a step of mixing the above-mentioned graphene basic structures with at least a lower alcohol having 1 or more and 5 or less carbon atoms to form a graphene aggregate in which the graphene basic structures are aggregated, and a step of forming a film using the graphene aggregate.

Provided are a graphene-based compound, a preparation method thereof, a single-phase composition for preparing a graphene-based compound, and a graphene quantum dot. Specifically, provided are a graphene-based compound prepared from a single-phase composition for preparing a graphene-based compound including hydrocarbyl amine, a hydroxyl group-containing carbon source, and an acid, a preparation method thereof, a single-phase composition for preparing a graphene-based compound, and a graphene quantum dot.

Presently disclosed is a multi-layered carbon-based scaffolded structure having a conductive substrate. A first film is deposited on the conductive substrate and includes: a first concentration of three-dimensional (3D) carbon-based particles comprising: a plurality of conductive 3D aggregates formed of graphene sheets that are sintered together to define a 3D hierarchical open porous structure with mesoscale structuring in combination with micron-scale fractal structuring that is also configured to provide conduction between contact points of the graphene sheets. A porous arrangement is formed in the 3D hierarchical open porous structure and contains a liquid electrolyte configured to provide ion transport through a plurality of interconnected porous channels. The first film is configured to provide a first conductivity. A second film is deposited on the first film and comprising a second concentration of 3D carbon-based particles. The second film configured to provide a second conductivity lower than the first conductivity.

Disclosed are sensor materials and sensors prepared from thermoplastic polymers filled with 2D nanoparticles. The thermoplastic polymers filled with 2D nanoparticles are prepared by a method in which a thermoplastic polymer is melt-blended with at least one layered material under shear sufficient to exfoliate the layered material in the thermoplastic polymer until 2D nanoparticles are formed, to provide covalently linked 2D nanoparticle-filled thermoplastic polymers. Such filled thermoplastic polymers have utility for preparing various types of sensors which are useful in a variety of practical applications and devices.

The embodiments herein provide a facile four-step process for the preparation of binder-free graphene felts that are free standing and mechanically robust. The step of deagglomeration of graphene material leads to a uniform size distribution which when combined/integrated with an appropriate moulding technique allows an easy fine tuning of various attributes of graphene felts including electrical conductivity, porosity, surface area, surface morphology and surface functionalization depending on the desired application. Since graphene felts obtained from this process do not incorporate any binder, to achieve better electrical conductivity, electrochemical activity and catalytic and sensing properties compared to conventional graphene felts while not compromising with their mechanical properties.

A multilayer body includes a base portion and a graphene film. In an ion mass distribution versus depth of the multilayer body determined by time-of-flight secondary ion mass spectrometry, detection intensities of C.sub.6 ions have a maximum value at a depth of greater than 0 nm and 2.5 nm or less from an exposed surface. Detection intensities of C.sub.3 ions have a maximum value at a depth of greater than 0 nm and 3.0 nm or less from the exposed surface. Detection intensities of SiC.sub.4 ions have a maximum value at a depth of 0.5 nm or greater and 5.0 nm or less from the exposed surface. Detection intensities of SiC ions have a maximum value at a depth of 0.5 nm or greater and 10.0 nm or less from the exposed surface. Detection intensities of Si.sub.2 ions have a maximum value at a depth of 0.5 nm or greater and 10.0 nm or less from the exposed surface. A value obtained by dividing the maximum value of the detection intensities of SiC.sub.4 ions by an average of detection intensities of SiC.sub.4 ions associated with a region of the multilayer body is 1 or greater and 3.5 or less, the region having distances from the exposed surface in a thickness direction of the multilayer body of equal to or greater than 8 nm and 12 nm or less.

Upgraded coal, method of forming the same, and graphene films and quantum dots made therefrom. A method of upgrading coal includes cleaning coal to form a cleaned coal residue. The method also includes (A) reacting the cleaned coal residue with an oxidizable inorganic metallic agent, or (B) reacting the cleaned coal residue with a reducing agent, or a combination thereof, to form the upgraded coal.

A three-dimensional graphene antenna includes a three-dimensional graphene radiation layer, a dielectric substrate, a metal layer and a feeder line. The three-dimensional graphene radiation layer is made from porous three-dimensional graphene. A preparation method of the porous three-dimensional graphene includes steps of preparing pressurized solid particles by pressurizing gas into solid micro particles, mixing the pressurized solid particles with a graphene oxide dispersion liquid, removing liquid nitrogen under high pressure and low temperature such that the graphene oxide flakes enwrap around the pressurized solid particles, obtaining a graphene oxide block containing the pressurized solid particles by extruding, sublimating the pressurized solid particles in the graphene oxide block into gas, forming holes in the graphene oxide block and annealing, thereby obtaining the three-dimensional graphene. The three-dimensional graphene has a porous three-dimensional conductive network structure, which is able to be in any shape without any pollution.

The present invention generally relates to a method of making graphene and graphene devices.