Sk Innovation Co., Ltd.

Lg Chem, Ltd

Korea Institute of Science and Technology

Other

Hyuck Lee

Sun Woong Choi

Yong Seung Kim

Gyung Rok Kim

Seung Hoon Oh

Sang Hun Oh

Hong Chan Kim

Cheol Joong Kim

Sung Won Kim

Jong Hyung Lee

Jae Suk Koh

Seung Woo Lee

Seung Beom Cho

Sang Il Lee

Dae Hyun Choo

Jong Pil Kim

Sam Ryong Park

Jae Hyun Koh

Duck Gyun Mok

Myoung Han Noh

San Su Son

No Woo Kwak

Min Hee Son

Jae Heung Kim

Tae Jin Kim

Tae Joong Kim

Jong Suk Chae

Eun Kyoung Kim

Heung Yong Ha

Yong Jin Choi

Jae Wook Ryu

Jung Young Son

Do Woan Kim

Won Tae Kim

Sang Soon Choi

Yoon Kyung Lee

Jung Im Kim

Soo Kil Kang

Kyung Seok Noh

Dong Joon Ahn

Vadim V Smirnov

Jae Ryong Shim

Hyung Wook Jeon

Sung Bum Park

Kyung Jong Oh

Byeung Soo Lim

Il Yong Jeong

Byoung Mu Chang

Kyeong Hak Seong

Jinyeon Hwang

Myoung Han No

Narm Hee Lee

Kang Seok Go

Seong Hwa Hong

Jong Seok Kang

Hyun Chul Choi

Jin Wook Ju

Yeong Ho Moon

Se Jung Ahn

Seung-Chang Bang

Hyun Sang Jung

A positive electrode active material contains a lithium transition metal oxide in the form of a secondary particle in which primary particles are aggregated, wherein a zirconium-containing coating film is formed on the surface of the lithium transition metal oxide secondary particle and at the interface between the primary particles present inside the secondary particle. A method of making the positive electrode active material is also provided.

Method of producing positive electrode active material for lithium secondary battery and positive electrode active material for lithium secondary battery produced thereby

The method of preparing a positive electrode capable of reducing the usage amount of a rinsing solution, and minimizing the surface degradation of a positive electrode active material is provided. A method of preparing a positive electrode active material includes: (A) preparing a lithium transition metal oxide; and (B) mixing the lithium transition metal oxide and a rinsing solution and performing rinsing and drying, wherein the rinsing solution includes one or more additive of LiOH, NaOH, or KOH, the additive is included in an amount of 3,000 ppm to 18,000 ppm relative to the lithium transition metal oxide in the rinsing solution, and the rinsing solution has a pH of 12 or more.

Method of preparing positive electrode active material

The present invention relates to a positive electrode active material having improved capacity characteristic and life cycle characteristic, and a method of preparing the same, and specifically, to a positive electrode active material for a lithium secondary battery, wherein the positive electrode active material comprises a compound represented by Formula 1 above and allowing reversible intercalation/deintercalation of lithium, and from a crystal structure analysis of the positive electrode active material by a Rietveld method in which space group R-3m is used in a crystal structure model on the basis of an X-ray diffraction analysis, the thickness of MO slab is 2.1275 Å or less, the thickness of inter slab is 2.59 Å or greater, and the cation mixing ratio between Li and Ni is 0.5% or less, and a method of preparing the same.

Positive electrode active material for lithium secondary battery, and positive electrode comprising same

Provided are a method of preparing a positive electrode active material for a secondary battery, in which the positive electrode active material is uniformly doped with various doping elements without worrying about surface damage of the active material and characteristics degradation by including mixing a metal precursor for a positive electrode active material and a raw material including a doping element, in which an average particle diameter ratio is in a range of 5:1 to 2,000:1, using acoustic resonance to prepare a precursor doped with the doping element, and mixing the doped precursor with a lithium raw material and performing a heat treatment, and a positive electrode active material which has improved structure stability by being prepared by the above method and may improve battery characteristics, for example, capacity reduction may be minimized and cycle characteristics may be improved when used in the battery.

Method of preparing positive electrode active material for secondary battery and positive electrode active material for secondary battery prepared thereby

Provided is a porous carbon material having carbon nano-rods on the surface thereof. The porous carbon material has an increased specific surface area and an increased electrochemically active area, and thus may be expected to provide improved performance, when used as an electrode for electrochemical reactions. In addition, the carbon nano-rods of the porous carbon material are formed through an etching process using a catalyst for etching formed on the carbon material, and thus the carbon material may have various functions.

Porous carbon materials and methods of manufacturing the same

A method for converting source data to a channel-modulated signal having a plurality of pairs of in-phase (I) and quadrature-phase (Q) data in a mobile station, wherein the mobile station uses at least one channel, includes the steps of: a) encoding the source data to generate at least one data part and a control part; b) generating at least one spreading code to be allocated to the channel, wherein each spreading code is selected on the basis of a data rate of the data part and the control part and spreading codes are selected so that two consecutive pairs of the I and Q data are correspondent to two points located on same point or symmetrical with respect to a zero point on a phase domain; and c) spreading the control part and the data part by using the spreading code, to thereby generate the channel-modulated signal.

Apparatus and method for modulating data message by employing orthogonal variable spreading factor (OVSF) codes in mobile communication system

The present invention relates to a method and system for constructing a database for a product demand/supply connection network of a technology market connection and analysis apparatus comprising a microprocessor for controlling the construction of a database for implementing a product demand/supply connection network, and further comprising the database for a product demand/supply connection network, in which information relating to the database generated in accordance with the control of the microprocessor is stored.

Method and system for constructing database for product demand/supply connection network

This invention relates to a method of producing aromatic hydrocarbons and olefin from hydrocarbonaceous oils including large amounts of polycyclic aromatic compounds having two or more rings via partial hydrogenation in the presence of a hydrogenation catalyst and catalytic cracking in the presence of a catalytic cracking catalyst.

Method of producing aromatic hydrocarbons and olefin from hydrocarbonaceous oils comprising large amounts of polycyclic aromatic compounds

The present invention relates to a method for manufacturing aromatic products (benzene/toluene/xylene) and olefinic products from an aromatic-compound-containing oil fraction, whereby it is possible to substitute naphtha as a feedstock for aromatic production and so make stable supply and demand, and it is possible to substantially increase the yield of high-added-value olefinic and high-added-value aromatic components, by providing a method for manufacturing olefinic and aromatic products from light cycle oil comprising a hydrogen-processing reaction step, a catalytic cracking step, an separation step and a transalkylation step, and optionally also comprising a recirculation step.

Method for producing high-added-value aromatic products and olefinic products from an aromatic-compound-containing oil fraction

This invention relates to a method of producing aromatics and light paraffins from hydrocarbonaceous oils derived from oil, coal or wood, including partially saturating and hydrocracking the oils derived from oil in a hydrogenation and reaction area, separating them depending on the number of carbons, recirculating heavy oils having 11 or more carbons to the hydrogenation and reaction area, feeding oils suitable for producing BTX to an aromatic separation process and a transalkylation process to recover aromatics, and feeding hydrocarbonaceous components having 5 or fewer carbons to a light separation process, thus obtaining light paraffins.

Method for producing valuable aromatics and light paraffins from hydrocarbonaceous oils derived from oil, coal or wood

This invention relates to a method of producing aromatics and olefins from oils derived from coal or wood, including partially saturating and cracking the oils derived from coal or wood in a hydrogenation and reaction area, separating them depending on the number of carbons, recirculating heavy oils having 11 or more carbons to the hydrogenation and reaction area, feeding oils suitable for producing BTX to an aromatic separation process and a transalkylation process to recover aromatics, and feeding hydrocarbonaceous components having 5 or less carbons to a light separation process, thus obtaining olefins.

Method of producing valuable aromatics and olefins from hydrocarbonaceous oils derived from coal or wood

This invention relates to a petroleum refining method for producing high value-added clean petroleum products and aromatics (Benzene/Toluene/Xylene) together, by which low pollution petroleum products including liquefied petroleum gas or low-sulfur gas oil and aromatics can be efficiently produced together from a fluid catalytic cracked oil fraction.

Process for the preparation of clean fuel and aromatics from hydrocarbon mixtures catalytic cracked on fluid bed

The present invention relates to the formation by a communication relay server of a communication pathway between a terminal and a service provider server. It relates to a communication relay system, server and method for same, wherein, when a terminal accesses a service provider server, the communication relay server uses virtual information such as path ID, etc., to form a communication pathway so that terminal identification information such as telephone number, etc., may not be directly exposed, and the communication pathway that is formed between the terminal and the service provider server may also be changed to a communication pathway that is formed between another terminal and the service provider server.

Communication relay system, server, and method for same

Multiview three-dimensional image display device

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Daejeon, South Korea

Hyuck Lee