46results about "Aligned nanotubes" patented technology

The application provides a preparation method of a transparent conductive film. The method comprises the following steps: laying a raw carbon nanotube film with a set area on a substrate surface and placing the substrate in a growth cavity; the substrate and the gas in the growth cavity are subjected to surface reconstruction, accompanied by transportation of facet atoms constituting a facet, so that a facet is formed, and the facet is in the form of a regular step on the substrate surface in a mesoscopic scale; and the facet and the raw carbon nanotube film are allowed to interact, so that impurities in the raw carbon nanotube film are removed, at least part of carbon nanotubes in the raw carbon nanotube film are driven to move by the facet, adjacent carbon nanotubes or bundles of carbon nanotubes tend to be close to each other, and a carbon nanotube network in the raw carbon nanotube film is recombined to obtain a recombined carbon nanotube film. The recombined carbon nanotube film obtained by the method has a more efficient conductive network inside, can be self-supported, and can also realize large-area preparation of the transparent conductive film.

The purpose of the present invention is to provide a carbon nanotube liquid dispersion that allows secondary battery electrodes to demonstrate a strong peel strength between an electrode mixture layer and a current collector formed from a metal, etc., and a weak peel strength for an electrode mixture layer provided with a release substrate made of a resin or the like, between the electrode mixture layer and the release substrate; and to allow a secondary battery to demonstrate superior rate performance, or realizes good film formation properties when a carbon film is formed. The carbon nanotube liquid dispersion according to the present invention contains carbon nanotubes and a solvent, wherein when a scattering curve obtained by the measurement conducted with ultra-small-angle X-ray scattering method is analyzed by the Beaucage model, the fractal dimension within a wavenumber range from 0.001 (1 / Å) to 0.3 (1 / Å) is in the range from 3 to 4.

A process for making a carbon nanotube structure includes forming a composite by depositing or growing carbon nanotubes onto a metal substrate, and infusing the carbon nanotubes. In other aspects, a method of making a wire, includes coating carbon nanotubes on a wire, and electroplating the carbon nanotubes. In still other aspects, a method of making a conductor includes growing or depositing vertically aligned carbon nanotubes on a sheet. Yet still, a method of making a cable includes forming multiple composite wires, each composite wire formed by depositing or growing carbon nanotubes onto a metal substrate, and performing a metal infusion of the carbon nanotubes. The method also comprises combining multiple finished composite wires or objects to make large cables or straps.

Methods and systems for the fabrication of composite materials are generally described. Certain inventive methods and systems can be used to fabricate composite materials with few or no defects. According to certain embodiments, composite materials are fabricated without the use of an autoclave. In some embodiments, composite materials are fabricated in low pressure environments.

A method for providing a substrate made of a porous carbonaceous material with vertically aligned carbon nanotubes, the method having a first step of depositing a ceramic underlayer on the substrate followed by a second step of synthesizing, by catalytic chemical vapour deposition, the vertically aligned carbon nanotubes on the substrate obtained after the first step, the carbon source necessary for the synthesis during this second step being injected in a direction substantially perpendicular to the plane of the substrate and at a pressure less than 8104 Pa (800 mbar). The use of the substrate for preparing an electrode such as a supercapacitor electrode.

Embodiments of the present disclosure relate to methods and apparatus for producing carbon nanomaterial (CNM) products, which may include carbon nanotubes and various other allotropes of nanocarbon. The methods and apparatus use consumable carbon dioxide (CO2) and renewable carbonate electrolyte as reactants in an electrolysis reaction to make CNTs. In some embodiments of the present disclosure, the operating conditions of the electrolysis reaction may be varied to produce CNM products with even greater generation of a desired allotrope of nanocarbon or a desired combination of two or more allotropes.

The purpose of the present invention is to provide a manufacturing method for carbon nanotube aggregates, which makes it possible to efficiently produce high-quality carbon nanotubes aggregates.　The present invention is a manufacturing method in which carbon nanotube aggregates are grown on a substrate having a catalyst on the surface. In the manufacturing method, a substrate is continuously transported using a transport unit for transporting the substrate, by screw rotation, in each of: a formation unit for performing a formation step in which a catalyst on the substrate is put in a reduction state; and a growth unit for performing a growth step in which carbon nanotube aggregates are grown. Moreover, when implementing the formation step and the growth step, gas environments in these steps are prevented from being mixed with each other while both steps are implemented.

The present invention relates to a method for producing a carbon nanotube fiber aggregate and provides a carbon nanotube fiber aggregate having an improved level of alignment through ultrasonic wave application and low speed recovery.

The present invention provides a nanotube array manufacturing method, a nanotube array, and a device, the method comprising the steps of: manufacturing a bilayer two-dimensional material having a relative include angle of lattice orientation on a substrate as a template; determining a chiral parameter of the nanotubes to be manufactured corresponding to the relative include angle of the lattice orientation of the bilayer two-dimensional material; determining a nanoribbon orientation and nanoribbon width based on the determined chiral parameter; determining a pitch between nanoribbons based on the density and nanoribbon width of the nanotubes to be manufactured; etching the bilayer two-dimensional material based on the determined nanoribbon orientation, nanoribbon width, and pitch between nanoribbons to obtain a nanoribbon array of the bilayer two-dimensional material; and thermally exciting the obtained nanotube array made of the bilayer two-dimensional material to obtain a nanotube array. The present invention can manufacture a nanotube array with controllable density, orientation, and chirality.

Carbon nanostructure-based composites and methods for making and using the same are described. The carbon nanostructure-based composites can be single-layer or multi-layer composites. Such composites can be useful for shielding radiation, such as that experienced by spacecraft and satellites. Carbon nanostructure-based composites containing low-Z and high-shielding efficiency (e.g., high-Z) materials and having radiation-shielding properties are described herein. A non-limiting exemplary composite is shown in Figure 1.

A high-performance lithium battery current collector and a conductive slurry, and preparation methods therefor. A functional coating of the current collector is a functional layered covering structure with a thickness of no more than 800 nm formed by coating a conductive slurry on a surface of a metal foil and drying. The functional coating includes a plurality of strip-shaped modified conductive agents, and after being cured and molded, the modified conductive agents are parallel to one another in the functional coating, axes of the modified conductive agents are arranged obliquely relative to a surface of the metal foil at an included angle of 15° to 45° within a thickness of the functional coating, and the modified conductive agents are interwoven with a modified nanofiber, a binder and the conductive agent in the coating.

Methods and systems for the fabrication of composite materials are generally described. Certain inventive methods and systems can be used to fabricate composite materials with few or no defects. According to certain embodiments, composite materials are fabricated without the use of an autoclave. In some embodiments, composite materials are fabricated in low pressure environments.

The purpose of the present invention is to provide carbon nanotube (CNT) aggregates having excellent dispersibility, and a method for producing the CNT aggregates.　The present invention pertains to carbon nanotube aggregates that satisfy at least one of conditions (1) to (3) below. (1) In an FT-IR spectrum of a CNT dispersion obtained by dispersing the CNT aggregates, a peak based on CNT plasmon resonance that is present in the range of a wave number exceeding 300 cm-1 but not more than 2,000 cm-1. (2) A maximum peak in differential pore volume distribution of the CNT aggregates falling in the range of a pore size exceeding 100 nm but less than 400 nm. (3) At least one peak in the two-dimensional spatial frequency spectrum of the CNT aggregates present in the range of 1 μm-1 to 100 μm-1, inclusive.

The proposed invention relates to the electrotechnical industry, more particularly to lithium-ion batteries, and even more particularly to lithium-ion batteries with silicon-containing anodes. The invention provides a method for preparing an anode paste, an anode paste, a method for preparing an anode for a lithium-ion battery, an anode for a lithium-ion battery, and a lithium-ion battery with a high initial specific capacity and many charge-discharge cycles while retaining at least 80% of the initial capacity. This technical result is achievable as a result of the presence of an anode material of bundles of single-walled and / or double-walled carbon nanotubes having lengths less than 5 μm, along with bundles of single-walled / double-walled carbon nanotubes having diameters greater than 500 nm and lengths greater than 10 μm.

A method of manufacturing a carbon nanotube sheet includes providing carbon nanotubes, advancing an elastic sheet having a first surface and a second surface opposite to the first surface in a first direction toward a direction changing member, bringing the first surface into contact with the direction changing member and looping the elastic sheet over the direction changing member so as to extend the second surface, advancing the elastic sheet from the direction changing member in a second direction different from the first direction so as to contract the second surface, causing upper ends of the carbon nanotubes to penetrate the second surface that is extended by being looped over the direction changing member, thereby providing temporal fixation therefor, and moving the carbon nanotubes in the second direction while the upper ends are penetrating the second surface.

The object of the present invention is to provide a production method and a production apparatus for a thin film of aligned carbon nanotubes. The present invention relates to a production method for an aligned carbon nanotube film having a film thickness of less than 1000 nm, including a step of causing a part of a dispersion solvent liquid of a carbon nanotube dispersion liquid to permeate to a lower surface side of a filter paper while causing the carbon nanotube dispersion liquid to flow in one direction on an upper surface of the filter paper, and a production apparatus that can be used for said method.

The present invention relates to bundle-type carbon nanotubes having an average bundle thickness of 10 um or more and a D50 of 10 µm or more. The carbon nanotubes have excellent electrical conductivity and dispersibility and are particularly suitable for use as a conductive material.

The substrate includes carbon nanotubes oriented substantially parallel away from the substrate. In a plane along the surface of the substrate, the carbon nanotubes are formed within first cells of a carbon nanotube connection structure. The first cells are formed within a second structure of second cells, whereby the carbon nanotubes are patterned into the structure of the first cells and nested within the structure of the second cells. The first cells include at least one opening without carbon nanotubes to provide access to the surface of the substrate. The second cells are separated from each other by grooves to prevent carbon nanotubes of a second cell from contacting carbon nanotubes of another second cell across a first gap formed by the grooves. The grooves provide access to the substrate. [Selection diagram] None

To provide techniques for transferring nanofiber forests, using transfer films that lack conventional adhesives at the substrate-nanofiber forest interface.SOLUTION: A nanofiber assembly comprises: a transfer film comprising a coating on a carrier and having bond strength; and a nanofiber forest comprising a plurality of nanofibers, the nanofiber forest disposed on the transfer film, and the nanofiber forest free of adhesive. The nanofibers comprise an arcuate portion, a straight portion, an angled portion, and an open end of the straight portion. The angled portion lies between the arcuate portion and the straight portion. The open end lies at an end of the straight portion opposite the angled portion. The nanofibers are perpendicular with respect to the transfer films.SELECTED DRAWING: Figure 2C

A composite comprises vertically aligned carbon nanotubes (VACNT) on a substrate and additional disordered carbon deposited on the outer face of the nanotubes. This additional carbon is not amorphous but comprises graphitic domains. This composite can be prepared by a chemical vapor deposition (CVD) process in the presence of a catalyst on a metal substrate at atmospheric pressure. It can be used as an electrode in electronic and electrotechnical devices, such as supercapacitors.

Provided is a carbon sheet for pellicle that includes a bundle composed of a plurality of carbon nanotubes, and a ratio (P / D) of porosity P to linear density D (in grams per kilometer [g / km]) is within a range of 0.2 to 10. Also provided is a pellicle that includes the carbon sheet and a pellicle frame configured to support it. The carbon sheet is free-standing and exhibits excellent transmittance with respect to ultraviolet rays, including extreme ultraviolet radiation. Further provided is a method for manufacturing the carbon sheet, which includes forming the bundle of carbon nanotubes by reacting a source material under controlled conditions. This method enables the formation of a carbon sheet that maintains mechanical stability while achieving high ultraviolet transmittance, suitable for use in photolithography processes.

The present invention discloses a negative electrode and a secondary battery, the negative electrode comprising a negative electrode active material layer including a negative electrode active material and a conductive material, the negative electrode active material comprising a silicon-based negative electrode active material, the conductive material comprising a carbon nanotube structure in which a plurality of single-walled carbon nanotube units are aligned and bonded to one another, the carbon nanotube structures having an average length of 2 μm to 20 μm, and 60 carbon nanotube structures having an average length of 2 μm to 20 μm as observed when a surface of the negative electrode active material layer is observed through a scanning electron microscope (SEM) at a magnification of 20,000 are selected, and an A value defined by the following [Equation 1] is measured for each of the selected carbon nanotube structures, and then an average A value calculated by arithmetically averaging the remaining 50 A values ​​other than the top 5 values ​​and the bottom 5 values ​​among the measured A values ​​is 70 to 100. [Formula 1] A = {straight-line distance between both ends of the carbon nanotube structure P / total length of the carbon nanotube structure Q} x 100

Electrical energy generation system with an assembly comprising: a light concentrating funnel; a multilayer photovoltaic cell; a thermos-electric layer: and a thermal stabilization device, wherein each layer of the multilayer photovoltaic cell contains: 5 semiconductor nanoparticles complexed with perovskite, an electrolyte, and a catalyst. The system assembly is arranged so as light can enter at a range of incidence angles at the light concentrating funnel, is directed and concentrated, then exits the light concentrating funnel and irradiates the multilayer photovoltaic cell where a voltage is generated, and the residual heat from these processes is stabilized with a thermal stabilization device.

The present invention aims to provide a carbon film having excellent electromagnetic wave shielding performance. The carbon film of the present invention is characterized by being composed of a carbon nanotube aggregate, when at least one surface of the carbon film is subjected to ultra-small-angle X-ray scattering measurement and a scattering pattern obtained is fitted with a Beaucage formula, a fractal dimension in a wave number range of above and below is 2.6 or more and 4 or less, and a porosity of the carbon film is 80% or more and 95% or less.

Electrostatic catalysis in chemical synthesis is known to boost reaction rates and selectively produce certain reaction products. Earlier studies required external electric field (EEF) of more than 10 MV / cm and alignment of EEF with the reaction axis. Such large and oriented EEF is unfeasible for large-scale implementation. Disclosed herein is a method of spontaneously shifting the band energy at the tip of an individual single-walled carbon nanotube (SWCNT) in a high-permittivity growth environment, with its other end in contact with a low work function electrode, such as hafnium carbide or titanium carbide. By adjusting the band energy at a point where there is a substantial disparity in the density of states (DOS) between semiconducting (s-) and metallic (m-) SWCNTs, effective electrostatic catalysis for s-SWCNT growth is achieved. The disclosed method enables the production of high-purity (99.92%) s-SWCNT horizontal arrays with stable chirality twist, aided by weak EEF as a perturbation.

The present disclosure provides a carbon sheet for a pellicle, a pellicle, and a method for manufacturing a carbon sheet for a pellicle, the carbon sheet having excellent transmittance to ultraviolet light and being capable of free-standing.SOLUTION: According to an exemplary embodiment of the present disclosure, it is possible to provide a carbon sheet for a pellicle, which includes a bundle composed of a plurality of carbon nanotubes and has a ratio (P / D) of a porosity (P) to a linear density (D, [g / km]) of 0.2 or more to 10 or less, a pellicle having excellent UV transmittance and capable of free-standing, and a method of manufacturing the carbon sheet for a pellicle.SELECTED DRAWING: Figure 1

Provided is a method for preparing transparent conductive films (TCFs), including: laying at least one original carbon nanotube (CNT) film on a surface of a substrate and placing them into a growth chamber; enabling the surface of the substrate to undergo reconstruction resulted from an interaction with a gas in the growth chamber, accompanied by transport of atoms constituting facets, to form facets, which appear as a regular stepped or zigzag pattern at a mesoscopic scale on the surface of the substrate; making the facets interact with the original CNT film, to remove impurities, and to cause at least a portion of CNTs in the original CNT film to move under driving of the facets, thereby compelling adjacent CNTs or bundles to adhere closely together, resulting in reorganization of a CNT network in the original CNT film to form a whole reorganized CNT TCF.

The invention discloses a carbon-based composite material and its preparation method and application. The carbon-based composite material comprises the substrate, carbon film and structural carbon, and the carbon film or structural carbon contains alkali metal element or alkaline earth metal element. The alkali metal element or alkaline earth metal element is used as the catalyst to make the carbon source deposit the carbon film on the substrate surface and the structural carbon on the carbon film, and the substrate, carbon film and structural carbon are bonded together forming an integrated body without use of binder. The carbon film and structural carbon modify the substrate to generate the carbon-based composite material with a excellent property, and the property comprises one or more of any property of material. A use of the carbon-based composite material is any kind material in any technical field.

The invention relates to a method for producing a carbon nanotube structure with substantially aligned carbon nanotubes (CNTs), and a temperature-controlled flow-through reactor.

The present invention relates to a method for producing carbon nanotube structures having substantially aligned carbon nanotubes (CNTs), and a temperature-controlled flow-through reactor.