Lg Chem, Ltd

Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

SungJin Kim

KyungYeon Kang

Jihee Woo

Seungyong Son

Seungyong Lee

Dongchul Lee

Jinmyung Cha

Sung-Kyun Chang

Dong Hyun Cho

Hyungsik Jang

JaeKeun Yoon

Je Young Kim

Jiyun Seol

Song Taek Oh

Hyun Woo Park

Jeongho Park

Seung-Tae Hong

Kyung Yeon Kang

Eugene Oh

YoHan Kwon

Yonghoon Lee

Byungchun Park

Minhyun Kim

Donghyun Cho

KwangWoo Yoon

Uitae Hwang

Jindo Kim

The present invention relates to an impregnated supported catalyst, a carbon nanotube aggregate, and a method for producing the carbon nanotube aggregate. The carbon nanotube aggregate includes a four-component catalyst in which catalytic components and active components are supported on a granular support, and bundle type carbon nanotubes grown on the catalyst. The carbon nanotube aggregate has an average particle diameter of 100 to 800 &#x3bc;m, a bulk density of 80 to 250 kg/m, and a spherical or potato-like shape.

Supported catalyst, carbon nanotube assembly, and preparation method therefor

Provided is a method for preparing a supported catalyst that enables the production of carbon nanotubes having a large specific surface area in high yield. Carbon nanotubes produced using the supported catalyst are also provided. The carbon nanotubes are suitable for use in various applications due to their large specific surface area and high yield.

Carbon nanotube having high specific surface area and method for manufacturing same

The present invention relates to a supported catalyst that can be used to produce a carbon nanotube aggregate with high bulk density, a method for preparing the supported catalyst, a carbon nanotube aggregate produced using the supported catalyst, and a method for producing the carbon nanotube aggregate. According to the present invention, the bulk density of the carbon nanotube aggregate is easily controllable. Therefore, the carbon nanotube aggregate is suitable for use in various fields.

Method for manufacturing carbon nanotube agglomerate having controlled bulk density

The present invention relates to a method for producing large-diameter, low-density carbon nanotubes. The method uses a catalyst containing spherical &#x3b1;-alumina that is capable of controlling the growth of carbon nanotubes without deteriorating the quality of the carbon nanotubes. The use of the catalyst makes the carbon nanotubes highly dispersible.

Carbon nanotubes having larger diameter and lower bulk density and process for preparing same

The present invention relates to a supported catalyst having a structure in which a metal catalyst is supported on a core-shell structured support. The support includes core particles and shell particles having a smaller particle diameter than the core particles and coated on the core particles to form a shell layer. Due to this structure, the supported catalyst can be used to produce carbon nanostructures that form a novel secondary structure in which ends of the carbon nanostructures are supported on the supported catalyst and form independent branches and the opposite ends grow and are assembled together. The novel structure is expected to find application in various fields, such as energy materials, functional composites, pharmaceuticals, batteries, and semiconductors, because of its characteristic shape.

Supported catalyst, method for preparing same, secondary structure of carbon nanostructure manufactured using same

Provided is a supported catalyst for producing carbon nanotubes with a large specific surface area. The supported catalyst enables the production of carbon nanotubes with a large specific surface area in high yield. Therefore, the catalyst can be used in various fields. Also provided are carbon nanotubes produced using the supported catalyst.

Catalyst for producing carbon nanotubes and carbon nanotubes produced using same

The present invention relates to a method for producing a carbon nanotube aggregate whose bulk density is easily controllable. Therefore, the present invention provides a carbon nanotube aggregate suitable for use in various fields.

Method for controlling bulk density of carbon nanotube agglomerate

A method and apparatus configures a beamforming coefficient based on the signal strength information without collecting channel information by adjusting the phase of the antennas through random perturbation. An antenna control method of a base station in a wireless communication system using a beamforming technique includes measuring nreceived signal strength at nphase of at least one receive antenna, measuring (n+1)received signal strength at (n+1)phase shifted randomly from the nphase in one of forward and backward directions, and configuring a beamforming coefficient with the phase at which the received signal strength is greatest through comparison of received signal strengths. The random perturbation-based beamforming method and apparatus of the present disclosure is capable of configuring the beamforming coefficient appropriate for the normal cellular environment using a plurality analog array antenna without channel estimation overhead.

Random perturbation-based beamforming method and apparatus for use in mobile communication system

The present invention relates to a novel secondary structure of carbon nanostructures, a bundle thereof and a composite comprising the same. The secondary structure according to the present invention is characterized that it is formed by a plurality of carbon nanostructures (CNSs) assembled to have a tube form in whole or in part. The novel secondary structure according to the present invention, the bundle thereof and the composite comprising the same are highly applicable in fields of energy materials, functional composites, batteries, semiconductors and the like.

Secondary structure of carbon nanostructure, bundle thereof and composite comprising same

Disclosed is an integrated electrode assembly having a structure in which a cathode, an anode, and a separation layer disposed between the cathode and the anode are integrated with one another, wherein the separation layer has a multilayer structure including at least one two-phase electrolyte including a liquid phase component and a polymer matrix and at least one three-phase electrolyte including a liquid phase component, a solid component, and a polymer matrix, wherein the polymer matrices of the separation layer are coupled to the cathode or the anode and the liquid phase components of the separation layer are partially introduced into an electrode in a process of manufacturing the electrode assembly.

Electrode assembly having novel structure and secondary battery using the same

Disclosed is a novel cathode active material for secondary batteries. More specifically, disclosed is a cathode active material for secondary batteries that reduces deintercalation of oxygen from a crystal structure of Li2MnO3 at a high voltage of 4.3V to 4.6V through incorporation of excess lithium in a transition metal cation layer.

Growing community of inventors

Daejeon, South Korea

SungJin Kim