High-surface area carbon nanotubes having targeted, or selective, species of oxygen containing species levels, types and/or content on either or both of the interior and exterior of the tube walls are claimed. Such carbon nanotubes can have little to none inner tube surface oxygen containing species, or differing amounts and/or types of oxygen containing species between the tubes' inner and outer surfaces or amongst the carbon nanotubes. Additionally, such high-surface area carbon nanotubes or their assemblages may have greater lengths and diameters, creating useful mechanical, electrical, and thermal properties.

The inventive concept described herein relates to nanostructured carbons having improved characteristics, and method of preparing the same.

High-surface area carbon nanotubes having targeted, or selective, oxidation levels and/or content on the interior and exterior of the tube walls are claimed. Such carbon nanotubes can have little to no inner tube surface oxidation, or differing amounts and/or types of oxidation between the tubes' inner and outer surfaces. Additionally, such high-surface area carbon nanotubes may have greater lengths and diameters, creating useful mechanical, electrical, and thermal properties.

Provided is a fibrous carbon nanostructure dispersion liquid having excellent fibrous carbon nanostructure dispersibility. The fibrous carbon nanostructure dispersion liquid contains a solvent and one or more fibrous carbon nanostructures that exhibit a convex upward shape in a t-plot obtained from an adsorption isotherm.

Embodiments of the present disclosure pertain to methods of making a carbon nanotube hybrid material by depositing a catalyst solution onto a carbon-based material, and growing carbon nanotubes on the carbon-based material such that the grown carbon nanotubes become covalently linked to the carbon-based material through carbon-carbon bonds. The catalyst solution includes a metal component (e.g., iron) and a buffer component (e.g., aluminum) that may be in the form of particles. The metal component of the particle may be in the form of a metallic core or metallic oxide core while the buffer component may be on a surface of the metal component in the form of metal or metal oxides. Further embodiments of the present disclosure pertain to the catalytic particles and carbon nanotube hybrid materials. The carbon nanotube hybrid materials of the present disclosure may be incorporated as electrodes (e.g., anodes or cathodes) in energy storage devices.

The present invention relates to Composite comprising CNT fibres and an ionic conducting compound forming a homogeneous continuous phase or a two-phase bicontinuous structure and its process of obtainment by impregnation methods. Furthermore the invention relates to its use as part of an energy storage device such as an structural flexible electrochemical capacitor.

The present invention provides a conductive material for a secondary battery, and a secondary battery containing the same, the conductive material comprising carbon nanotubes, having a secondary structure in which carbon nanotube units having a diameter of 20-150 nm are entangled, having a ratio of true density to bulk density (TD/BD) of 30-120, having a metal content of 50 ppm or less, and having both excellent dispersibility and high purity, thereby being capable of improving, by increasing the conductivity within an electrode, battery performance, particularly, battery performance at room temperature and low temperature when applied to a battery.

The present disclosure relates to a method for continuously synthesizing carbon nanotubes using a plasma treated catalyst. The method for continuously synthesizing carbon nanotubes comprises: a plasma treating step of preparing metal nanoparticles by plasma treating metal salts in an H.sub.2 or NH.sub.3 atmosphere; a first mixture preparing step of preparing an emulsion mixture by mixing a solvent and a surfactant; a second mixture preparing step of preparing a second mixture by mixing the emulsion mixture and a carrier gas; and a reacting step of forming carbon nanotubes by introducing the second mixture and metal nanoparticles into a heated reactor. Accordingly, the catalyst can be prepared by reducing metal salts at a relatively low temperature and in a shorter time, the yield of the carbon nanotubes can be increased, and the diameter of the carbon nanotubes can be uniformly controlled, thereby enabling an economical and mass production of carbon nanotubes.

Disclosed is a sheet which comprises a fibrous substrate and carbon nanotubes attached to fibers constituting the fibrous substrate. The carbon nanotubes in the sheet comprise single-walled carbon nanotubes as a main component.

Provided is an electrode mixture layer capable of reducing internal resistance by use of a carbon nanotube molding. The electrode mixture layer includes an active material and a conductor of carbon nanotubes in close contact with the surface of the active material, and the number density of the carbon nanotubes is 4 tubes/m or more. The number density is defined as a value obtained by providing measurement lines on a scanning electron microscope image of a surface of the electrode mixture layer at 0.3 m intervals both longitudinally and laterally, measuring the total number of the carbon nanotubes being in close contact with the surface of the active material and intersecting the measurement lines, and dividing the total number of the carbon nanotubes by the total length of the measurement lines on the active material surface.