28results 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.

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 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.

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 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.

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.

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

The purpose of the present invention is to provide a carbon film having excellent electromagnetic shielding performance. This carbon film is formed from carbon nanotube aggregates, and is characterized in that, when a scattering profile obtained by ultrasmall angle X-ray scattering analysis of at least one surface of the carbon film is fitted to the Beaucage equation, the fractal dimension in the wave number range from 0.0001 (1 / Å) to 0.001 (1 / Å) is 2.6-4, and the porosity is 80-95%.

Various embodiments may relate to a method of forming a carbon nanotube-based electrode. The method may include growing a carbon nanotube array on or over a semiconductor substrate using a chemical vapor deposition process such that the carbon nanotube array is subsequently separated from the semiconductor substrate via self-delamination. The method may also include transferring the carbon nanotube array, the carbon nanotube array being a freestanding carbon nanotube array, to a water bath. The method may further include immersing a target substrate into the water bath. The method may additionally include removing the target substrate with the carbon nanotube array from the water bath to form the carbon nanotube-based electrode, which includes the target substrate and the carbon nanotube array.

A carbon film excellent in electromagnetic shielding performance is provided. The carbon film is made of a carbon nanotube assembly and has a fractal dimension of 2.6 or more and 4 or less in a wavenumber range of 0.0001 (1 / Å) or more and 0.001 (1 / Å) or less when a scattering profile obtained by performing ultra-small-angle X-ray scattering on at least one surface of the carbon film is fitted to the Beaucage equation, while having a porosity of 80 % or more and 95 % or less.

The invention relates to electrotechnical industry, more particularly to lithium-ion batteries, and even more particularly to lithium-ion batteries with silicon-containing negative electrode (anode). The invention provides a method for producing an anode slurry (paste), an anode slurry (paste), a method for producing 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 a long cycle life with a large number of charge-discharge cycles over which the battery retains at least 80% of its initial capacity. This result becomes possible due to the presence in the anode material of bundles of single-walled and / or double-walled carbon nanotubes having a length of less than 5 μm, together with bundles of single-walled and / or double-walled carbon nanotubes having a diameter of more than 500 nm and a length of more than 10 μm.

The present disclosure provides carbon nanotube (CNT)-to-metal assemblies comprising a carbon nanotube (CNT) component connected to a metal component, and methods for preparing them. The assemblies may be connected through a CNT-to-metal connector that may comprise a CNT connector pad.

Solder-carbon nanostructure composites and methods of making and using thereof are described. Such composites can be useful for thermal application and can serve, for example, as thermal interface materials (TIMs).

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 relates to a method for providing a substrate made of a porous carbonaceous material with vertically aligned carbon nanotubes, said method having a first step of depositing a ceramic underlayer on said substrate followed by a second step of synthesising, by catalytic chemical vapour deposition, said 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 present invention relates to said substrate thus provided and to the use of same for preparing an electrode such as a supercapacitor electrode.

A process and apparatus for producing carbon nanofibers. The process comprises two stages. The first stage involves oxidizing light hydrocarbon with carbon dioxide or water, or oxygen, or a combination thereof to a mixture of hydrogen and carbon monoxide. The second stage involves converting the produced hydrogen and the carbon monoxide to carbon nanofibers and steam. In this way, greenhouse gases may be reduced by using carbon dioxide and methane (and / or other light hydrocarbons) as reactants; and useful products may be produced, such as Carbon NanoFibers (CNF).

Carbon nanostructure-based composites and methods of making and using thereof are described. The carbon nanostructure-based composites may be single-layered or multi-tiered composites. Such composites can be useful for radiation shielding, such as experienced by spacecraft and space satellites.

The present invention relates to a bundle-type carbon nanotube which has a bulk density of 25 to 45 kg / m3, a ratio of the bulk density to a production yield of 1 to 3, and a ratio of a tap density to the bulk density of 1.3 to 2.0, and a method for preparing the same.

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 ([g / km]) is in a range of 0.2 to 10, and provided is a pellicle and a method of manufacturing a carbon sheet for pellicle that is free-standing and have an excellent transmittance against UV rays.