150 results about "Carbon nanostructures" patented technology

There is provided a method for producing graphene or a hollow carbon nanostructure such as hollow spherical, ellipsoidal and tubular nanostructures. The method comprises a) mixing together water, an organic solvent that is immiscible with water, and a surfactant to prepare a suspension of self-assembled surfactant templates, b) adding a monomer to the suspension, c) polymerizing the monomer to form a polymer on the self-assembled surfactant template, and d) decomposing the polymer into carbon, thereby forming graphene or the hollow carbon nanostructure. There is also provided crystalline twisted bilayer or few-layer graphene which can be produced by this method.

A method of manufacturing a carbon nanostructure, such as a carbon foam material, is disclosed. The method comprises the steps of: (a) using a first laser beam to irradiate an encapsulated or sub-surface region of a carbon pre-cursor material below a surface of the material, to create carbon foam in that sub-surface region, and a disorganised, amorphous non-graphene material above the carbon foam, and then (b) using a second laser beam to remove or ablate the disorganised, amorphous non-graphene material sitting above the carbon foam, to expose at least some of the carbon foam. The resultant carbon foam material shows a significant D peak; the 2D peak is significantly less than the G peak; and the peak D:peak G ratio is significantly above zero. In appearance and Raman signature, it appears similar to a carbon nano-onion material. It can be used in biosensors, supercapacitors and pseudo-capacitors.

The invention discloses a carbon-based confinement type catalyst as well as a preparation method and application thereof. The catalyst comprises a sludge carbon substrate, and carbon nanotubes and active metals covering the surface of the substrate, the active metal comprises Fe and Ni; ni is doped in the carbon nanotube to form a confinement structure; fe is loaded outside the carbon nanotubes. The active metal of the carbon-based confinement type catalyst is confined in a superstructure carbon nanostructure covering the surface of a carbon substrate, so that the hydrothermal oxidation efficiency can be effectively improved, the degree of cracking of sludge extracellular polymeric substances is improved, deep cracking of sludge is realized, and the risk of secondary pollution caused by loss of the active metal is reduced; the catalyst can selectively oxidize macromolecular organic matters released by sludge disintegration, the product selectivity of micromolecular carboxylic acid is improved to be higher than 95% by a confinement structure, the micromolecular carboxylic acid can be further utilized as a carbon source, the treated supernate can be used as a composite carbon source to be applied to the biochemical process of sewage treatment, and resource utilization is realized; the catalyst can realize HTO treatment of sludge at 200 DEG C or below, and does not generate biotoxic by-products in the sludge treatment process, and the treated product can be used as a high-quality carbon source.

A composite, comprising a binder, the binder comprising one or more of polymeric, metallic, or ceramic, or pyrolytic carbon binder and a nanostructured carbon having a cellular structure. The cellular structure comprises one or more cell walls having a structure formed by a template and one or more cavities. Each cavity is substantially enclosed by the one or more cell walls and substantially unimpregnated by a liquid or solid.

It relates to a porous self-standing homogeneous hydrogel comprising poly(vinyl alcohol) and carbon nanostructures, wherein: the carbon nanostructures are present in an amount from 7 to 85% by weight with respect to the sum of the weights of the poly(vinyl alcohol) and of the carbon nanostructures and the pores have an average particle size equal to or higher than 8 µm. It also relates to processes for the preparation of these hydrogels including phase inversion and cross-linking methods, and to their use in nerve regeneration.

The invention relates to the technical field of semiconductor material preparation, and provides a TaC composite coating process based on a carbon nanostructure transition layer and a product thereof. The method comprises the following steps: a) pretreating the surface of a base material to form a groove, b) introducing a carbon source gas, carrying out first chemical vapor deposition under the action of a metal salt catalyst to grow carbon nanoparticles, and depositing the base material pretreated in the step a) to obtain a transition layer deposition base material, c) gasifying a tantalum source, mixing the gasified tantalum source with the carbon source gas, a reaction gas and a carrier gas, and carrying out second chemical vapor deposition to obtain the transition layer deposition base material. And second chemical vapor deposition is conducted, the transition layer deposition base material is filled with the fine grain particle layer, then deposition continues to be conducted on the surface of the transition layer deposition base material to form the coarse grain particle layer, and finally the TaC composite coating is obtained. According to the method, the compactness of the coating can be improved, the bonding strength of the coating and the base material is enhanced, the performance of the TaC composite coating is improved, the service life of the TaC composite coating is prolonged, and the reliability of the TaC composite coating is improved.

The invention relates to the technical field of copper alloy strips, and discloses a vehicle-mounted connector copper alloy strip which comprises the following components in percentage by mass: 0.04 to 0.1 weight percent of Y, 1.5 to 3.5 weight percent of Sn, 0.02 to 0.08 weight percent of P, 0.5 to 2.5 weight percent of carbon nanostructure X and the balance of copper and inevitable impurities, wherein the carbon nano structure X is a compound of a carbon nano tube and fullerene, and the mass ratio of the carbon nano tube to the fullerene is (2-4): 1; the invention also discloses a preparation method. According to the invention, through the comprehensive advantages in the aspects of conductivity and corrosion resistance, the electrical connection function can be stably and reliably realized in a vehicle-mounted connector, powerful hardware support is provided for the intelligent and electric development of an automobile, and the adaptability and safety of the automobile under different working conditions are enhanced; and the maintenance cost of the automobile is reduced, and the downtime caused by faults is shortened.

The invention discloses a high-strength and high-conductivity glass fiber reinforced PBT (polybutylene terephthalate) composite material and a preparation method thereof. The high-strength and high-conductivity glass fiber reinforced PBT composite material is prepared from the following raw materials in percentage by weight: 40 to 90 percent of polybutylene terephthalate (PBT) resin, 5 to 30 percent of chopped glass fiber, 0.1 to 10 percent of carbon nanostructure material CNS, 0.1 to 10 percent of dispersing aid, 0.1 to 15 percent of toughening agent, 0.1 to 5 percent of antioxidant and 0 to 2 percent of other aids. The high-strength and high-conductivity glass fiber reinforced PBT composite material disclosed by the invention has relatively high tensile strength and bending strength, excellent conductivity and good injection molding performance, and can be widely applied to the automobile interior industry and the electronic and electric appliance industry.

The present invention relates to a medical device manufactured using the additive manufacturing process (3D printing). It is a medical device used preferably as a bone graft composed of a porous structure based on bioceramics based on β-tricalcium phosphate (β-TCP) or hydroxyapatite, which may or not contain nanostructures in its composition, for example: carbon nanostructures (graphene, graphene oxide, reduced graphene oxide, carbon nanotubes, etc.) and, in preferred embodiments, stem cells and polymeric membrane. Also, the present invention relates to the use of this device as a bone graft and the process of preparing this device.

Disclosed are an electrochemical hybrid catalyst that has a configuration in which two species of single atomic metals, that is, nickel (Ni) and iron (Fe), each bonded to (coordinated with) nitrogen in a nitrogen-doped carbon nanostructure, are adjacent to each other and are indirectly linked via nitrogen to form a catalyst site or an active site and thus exhibits high carbon monoxide selectivity and current density at a low overpotential during reduction reaction for converting carbon dioxide into carbon monoxide, and a carbon dioxide conversion system using the same.

FIELD OF THE INVENTION The present invention relates to a conductive agent, an electrode for a lithium battery, and a method for producing the conductive agent. The conductive agent comprises a dry mixture, preferably a freeze-dried mixture, of carbon nanostructures and carbon black.

The invention provides a composite silicon-carbon negative electrode material and a preparation method thereof, a negative electrode plate and a battery. The composite silicon-carbon negative electrode material comprises a silicon-carbon composite core, and a gradient pore carbon buffer layer and a dynamic self-healing binder layer which sequentially coat the surface of the silicon-carbon composite core, a branched carbon nanostructure grows in the pore wall of the gradient pore carbon buffer layer, the dynamic self-healing binder layer partially permeates into the pores of the gradient pore carbon buffer layer, the dynamic self-healing binder layer contains dynamic disulfide bonds, and the dynamic self-healing binder layer comprises a composite binder and a conductive high-molecular polymer. According to the invention, the gradient pore buffer layer is arranged on the surface of the silicon-carbon particles, and meanwhile, the self-healing binder containing dynamic disulfide bonds is used for permeation filling, so that three-dimensional cooperative regulation and control of graded dissipation of expansion stress, self-repairing of microcracks and ion / electron dual-path conduction are realized; the three core problems of electrode pulverization caused by volume expansion, interface impedance sharp increase and long circulation capacity attenuation are thoroughly solved.

The invention relates to an electrochemical hybrid catalyst that has a configuration in which two species of single atomic metals, that is, nickel (Ni) and iron (Fe), each bonded to (coordinated with) nitrogen in a nitrogen-doped carbon nanostructure, are adjacent to each other and are indirectly linked via nitrogen to form a catalyst site or an active site. The catalyst exhibits high carbon monoxide selectivity and current density at a low overpotential during reduction reaction for converting carbon dioxide into carbon monoxide. The invention further relates to a carbon dioxide conversion system using said catalyst.

A method of enhancing extreme ultraviolet (EUV) transmission and reducing scattering of a carbon nanostructure pellicle film is disclosed. The method includes treating the carbon nanostructure pellicle film with at least one irradiation, which reduces the defects of the carbon nanostructure and strengthens the properties of the carbon nanostructure. Carbon nanostructure pellicle film with modified and enhanced properties for EUV lithography is also disclosed.

The invention relates to the technical field of bridge and tunnel paving materials, in particular to an anti-rutting epoxy asphalt modifier and a using method thereof.The anti-rutting epoxy asphalt modifier is prepared from, by mass, 13-27 parts of a component A and 12.1-27 parts of a component B; the component A comprises the following components in parts by mass: 10-20 parts of epoxy resin; 2-4 parts of a reactive diluent; 1-3 parts of a composite bifunctional compatilizer; the component B comprises the following components in parts by mass: 10-20 parts of a curing agent; 2-4 parts of an accelerant; 0.1-3 parts of a functionalized carbon nanomaterial; a carbon nanomaterial is subjected to amino silane functional modification, so that the adaptability among epoxy, asphalt and aggregate is improved, the carbon nanomaterial and the asphalt are premixed to form an asphalt-carbon nanoskeleton structure, and the compatibility between the epoxy and the asphalt is improved by utilizing a composite bifunctional compatilizer; finally, the epoxy, the asphalt and the aggregate are tightly bonded through physical blending and chemical bonding, so that the anti-rutting performance is greatly improved.

The present technology provides a curable silicone-based composition comprising a curable silicone polymer, a catalyst, an electrically conductive filler, and carbon nanostructures. The combination of the electrically conductive filler and the carbon nanostructures provide a cured material that exhibit good electrical conductivity and electromagnetic interference shielding.

To provide a fibrous carbon nanostructure that can be easily surface-modified.SOLUTION: A fibrous carbon nanostructure of the present invention has a symmetry factor of 3.70 or less for a peak of a first derivative curve of a thermogravimetric curve obtained by thermogravimetric analysis under a dry air atmosphere. The first derivative curve of the thermogravimetric curve can be a temperature derivative curve of the thermogravimetric curve or a time derivative curve of the thermogravimetric curve.SELECTED DRAWING: Figure 2

Electrodes and rechargeable lithium batteries including the electrodes are disclosed. The electrode may include an electrode current collector and a multi-layered active material layer thereon. The multi-layered active material layer may include first to third active material layers sequentially stacked on the electrode current collector. The first active material layer may include a first active material. The second active material layer may include a second active material and a first composite conductive material. The third active material layer may include a third active material and a second composite conductive material. The first composite conductive material may include a first carbon nanostructure and a first polymer. The second composite conductive material may include a second carbon nanostructure and a second polymer. The first polymer and the second polymer may be different from each other. The first polymer may have higher ionic conductivity than the second polymer.

To provide: a transition metal based electrochemical electrode catalyst available for carbon dioxide reduction that improves price competitiveness with better activity than noble metal catalysts such as Ag / C; a production method thereof; an electrode for carbon dioxide reduction reaction containing the catalyst; and a carbon dioxide reduction system including the catalyst.SOLUTION: An electrode catalyst comprises: a support comprising a nitrogen-doped carbon nanostructure; and Ni and Fe in the form of single atoms each supported on the support, where the Ni is bonded to four surrounding nitrogen atoms while the Fe is bonded to five surrounding nitrogen atoms, and where the Ni and Fe at the respective sites are adjacent to each other and are indirectly linked to each other via nitrogen, thereby forming an active site. The electrode catalyst exhibits high carbon monoxide selectivity and current density under a low overpotential condition during reduction of carbon dioxide to carbon monoxide.SELECTED DRAWING: Figure 1

A structure including a coated free-standing film attached to a support wherein the free-standing film is a free-standing film of carbon nanostructures and a parylene-coating having a thickness of 5-200 nm is provided on the free-standing film.

A method for producing a film of functionalized carbon nanostructures includes providing an electrode including a film of carbon nanostructures attached to a support, subjecting the electrode to an electrografting process in a bath containing water and at least one diazonium compound, conducting the electrografting process using potential pulses, wherein each potential pulse consists of an ON-time, wherein potential is applied for 0.01-0.1 s and an OFF-time, wherein zero potential is applied for 0.01-0.1 s, to form anchoring sites on the surfaces of the carbon nanostructures. Further is disclosed a film of functionalized carbon nanostructures. Further the use of the film or the method for forming a sensor, a filter, an electron stopping window, and / or a pellicle is explained.

A biosustainable wood-based microfluidic cassette having an impedimetric nitrate sensor for nitrate monitoring of water samples, wherein the nitrate sensor employs a nanocomposite having nitrate-binding metal ion complexes incorporated in and / or on polyaniline / carbon nanostructure. The nitrate sensor demonstrates good specificity to nitrate, reproducibility, a wide temperature range operability, and measurement equivalency to commercial nitrate sensors.

The present invention relates to a conductive agent, an electrode for a lithium battery, and a method for producing the conductive agent. The conductive agent comprises a dried, preferably freeze-dried, mixture of a carbon nanostructure and a carbon black.

Disclosed is a carbon fiber precursor treatment agent that contains a carbon nanostructure and a surfactant. The carbon nanostructure is present in the nonvolatile matter of the carbon fiber precursor treatment agent at a content of 10 ppm or more and less than 50,000 ppm.

The present invention provides a method for preparation of porous hard-carbon nanostructures and applications thereof. Particularly, the present invention provides a the method for preparation of porous nano-carbon florets (NCF) comprising chemical vapour deposition of a carbon source on a silica-based template followed by removal of silica via alkali-mediated etching and spray coating of NCF over desired substrates. The resulting nano-carbon florets (NCF) finds application in light-heat conversion such as use of NCF in solar-thermal conversion for generating temperature in dry state as well as for evaporating water; use of NCF in solar-thermal conversion for bacteriocidal disinfection of water. The NCF of the present invention may also be utilized for heavy metal scavenging and wastewater remediation.

Disclosed herein are methods of electrochemically producing halogen using an oxygen consuming gas diffusion electrode, referred to herein as an oxygen depolarized cathode (ODC). The electrode can include heteroatom-doped carbon nanostructures as catalysts for both halogen evolving anodes and oxygen depolarized cathodes. Examples of halogens that can be produced include chlorine and bromine by oxidation of the respective halide ions.

A method of manufacturing a carbon nanostructure, such as a carbon foam material, is disclosed. The method comprises the steps of: (a) using a first laser beam to irradiate an encapsulated or sub-surface region of a carbon pre-cursor material below a surface of the material, to create carbon foam in that sub-surface region, and a disorganised, amorphous non-graphene material above the carbon foam, and then (b) using a second laser beam to remove or ablate the disorganised, amorphous non-graphene material sitting above the carbon foam, to expose at least some of the carbon foam. The resultant carbon foam material shows a significant D peak; the 2D peak is significantly less than the G peak; and the peak D:peak G ratio is significantly above zero. In appearance and Raman signature, it appears similar to a carbon nano-onion material. It can be used in biosensors, supercapacitors and pseudo-capacitors.

The application provides a graphite processing method for blocking molten salt and molten metal infiltration, comprising the following steps: S1: providing a thermosetting resin monomer or oligomer solution, adding a small amount of catalyst to the solution to form a precursor, and immersing the precursor into graphite pores; S2: converting the precursor immersed in the graphite pores into organic nanostructures through solidification and drying; and S3: carbonizing the organic nanostructures in the graphite pores at a temperature higher than 500 DEG C to form carbon nanostructures, so that a graphite capable of blocking molten salt and molten metal infiltration is obtained. The processing method provided by the application has the advantages of simple process, difficulty in failure, and no change in the performance of the base material, compared with the traditional surface coating, resin and other impregnation methods, and has obvious advantages over other processing methods when used for processing the graphite in a molten salt core, and has little influence on the mechanical, thermal and radiation behaviors of the graphite, so that the cost caused by the reevaluation of the graphite material can be saved or reduced.

To provide an electrode for an energy storage device that has an active material layer with a novel structure consisting mainly of carbon nanostructure and that can achieve high battery performance.SOLUTION: An electrode for an energy storage device comprises a metal substrate that constitutes a current collector and has a micro-uneven structure formed on its surface, and an active material layer consisting mainly of carbon nanostructure composed of nanographene and amorphous carbon, and densely covering the surface of the uneven structure, in which metal atoms involved in the charging and discharging of the energy storage device are deposited on the surface when the device is charged.SELECTED DRAWING: Figure 2

The present invention relates to a conductive agent composition, a conductive agent dispersion comprising the conductive agent composition, a method for preparing the conductive agent dispersion, the use of the conductive agent composition or the conductive agent dispersion in manufacturing an electrode, and an electrode. The conductive agent composition comprises carbon black and at least one material selected from the following materials: a carbon nanostructure, fragments of a carbon nanostructure, and fragmented multi-walled carbon nanotubes.