Lg Chem, Ltd

Electronics and Telecommunications Research Institute

Korea Advanced Institute of Science and Technology

Kolon Industries, Inc.

Korea Institute of Energy Research

Dacom Corporation

Dong Wook Lee

Hun Soon Lee

Doo Kyung Yang

Hee-Tak Kim

Kah-Young Song

In Seok Hwang

Seung Wook Kim

Jun Young Kim

Ji Young Hwang

Ji Eun Kim

Myung Han Lee

Sang Ki Chun

Yu Mi Kim

Jong Hyun Chae

Yun Kyoung Kim

Gi Su Park

Tae Joo Chang

Du Hyeon Shin

Dong Han Kho

Jae Sung Han

Shin Kun Ryi

Hye Jin Han

Sung Wook Lee

Bon Seok Koo

Hyun Seok Choi

Jungho Lim

Jeong Yong Lee

Beom Seok Seo

Nak-Won Kong

Jong Soo Park

Soojung Yeo

Eun Kyung Cho

Myoung Jin Kim

Gwan Ho Ryu

Seung Ha Kim

Seongmin Yuk

Byung Gook Lyu

Disclosed are a radical scavenger, a method for preparing same, and a membrane-electrode assembly containing same, wherein the radical scavenger can maintain the performance of a fuel cell for a long time and enhance the lifespan thereof since the elution of metal ions derived from radical scavenging particles during fuel cell operation can be continuously prevented for a long time. The radical scavenger of the present invention comprises: radical scavenging particles; and a porous protective film on the surface of the radical scavenging particles, wherein the porous protective film comprises at least one material of high oxidative stability selected from the group consisting of silica, carbon nitride, heteroatom-doped graphene, a porphyrin-based compound, a phenazine-based compound, and derivatives thereof.

Radical scavenger, method for preparing same, and membrane-electrode assembly containing same

Disclosed are a fuel cell catalyst of which only a portion, which has relatively low catalytic activity and in which the greatest amount of platinum elution occurs and platinum oxide is easily formed, is selectively coated with a protective layer, and thus degradation due to the long-term operation of a fuel cell can be effectively prevented while also minimizing a deterioration in catalytic activity; a manufacturing method therefor; and a membrane-electrode assembly including same. The fuel cell catalyst of the present invention comprises: a nanoparticle containing platinum; and a protective layer which is selectively coated on only a portion of the surface of the nanoparticle and can suppress the oxidation of the platinum through electronic interaction with the nanoparticle.

Fuel cell catalyst, manufacturing method therefor, and membrane-electrode assembly including same

The present application provides a resin composition which effectively inhibits a photobleaching phenomenon as well as realizes excellent external blocking properties and optical properties through the secondary structure transition concentration and relaxation time of the resin composition, a reliability evaluation method thereof, and a color conversion film comprising the same.

Resin composition and reliability evaluation method thereof and color conversion film comprising the same

The present disclosure relates to a positive electrode active material and a positive electrode comprising metal nano particles, and a lithium-sulfur battery comprising the same, and in particular, to a positive electrode for a lithium-sulfur battery comprising a positive electrode active material of a sulfur-metal catalyst-carbon composite, and a lithium-sulfur battery comprising the same. The lithium-sulfur battery using a positive electrode comprising metal nano particles according to the present disclosure increases reactivity of sulfur, a positive electrode active material, and increases electrical conductivity of an electrode by the dispersion of the metal nano particles in the electrode so as to increase reactivity and electric capacity of the positive electrode. In addition, battery reaction products such as lithium sulfide (LiS) are readily decomposed by a catalyst reaction, and therefore, lifespan characteristics can be improved.

Cathode active material and cathode comprising metal nano particles, and lithium-sulfur battery comprising same

The present invention relates to a positive electrode of a lithium-air battery having a side reaction prevention layer with a partially introduced metal catalyst, and a method for preparing the same, and in particular, to a positive electrode of a lithium-air battery having a side reaction prevention layer with a metal catalyst sporadically partially introduced to a surface thereof, and a method for preparing the same. The lithium-air battery according to the present invention suppresses a side reaction at an interface between a positive electrode active material and an electrolyte thereby effectively reduces an overvoltage when charged, and therefore, does not cause liquid electrolyte decomposition, which is effective in enhancing a cycle life.

Positive electrode of lithium-air battery having side reaction prevention film to which metal catalyst is partially introduced, lithium-air battery having same, and manufacturing method therefor

The present application relates to a light conversion device, a backlight unit and a display apparatus.

Light conversion device and display apparatus comprising the same

The present invention relates to a method for preparing a hydrogen separation membrane capable of preventing the plating of Pd inside a porous support and a porous shielding layer when a separation membrane is prepared; a hydrogen separation membrane prepared therefrom; and a use thereof. In addition, the present invention relates to a device for preparing a hydrogen separation membrane; and a method for preparing a hydrogen separation membrane using the device, and in particular, relates to a device for preparing a hydrogen separation membrane capable of stably growing a Pd-containing separation membrane for hydrogen gas separation as a plating solution grows from the upper surface of a porous support to a uniform thickness by simply shielding the lower surface of the porous support when a hydrogen separation membrane is prepared using an electroless plating method. Furthermore, the present invention relates to a device for preparing a hydrogen separation membrane, and in particular, relates to a device for preparing a hydrogen separation membrane capable of stably growing a composite membrane for hydrogen gas separation as a plating solution grows from the top of a porous support to a uniform thickness by simply shielding the bottom of the porous support.

Method for preparing hydrogen separation membrane and device for preparing hydrogen separation membrane

There are provided a sheet having a silicon/plastic bi-layer structure capable of easily transferring a paste even when a hard roll is used, the hard roll having excellent durability but having disadvantages that the paste is poorly transferred when the paste is printed on a plastic base, and a method for producing the same. The bi-layer structured sheet having excellent printability when printed by hard roll includes a flexible substrate and a silicon resin formed on the substrate.

Bi-layer structured sheet having excellent printability when printed by hard roll and method for producing the same

Provided is an apparatus for computing a T-function based Stream Cipher (TSC)-4 stream cipher. The apparatus includes: two T-function units; and a nonlinear filter for receiving bits output from the two T-function units and generating an 8-bit output sequence per clock. Each of the T-function units includes: a first register for storing an internal state value of the lower N bits; an N-bit internal state updater for updating the internal state value of the lower N-bits stored in the first register; an intermediate result register for storing an intermediate result value output from the N-bit internal state updater; a second register for storing an internal state value of the upper M bits; and an M-bit internal state updater for updating the internal state value of the upper M bits stored in the second register using the value stored in the intermediate result register.

Apparatus for computing streamcipher TSC-4

The present invention provides a method for preparing a conductive pattern, comprising a pattern forming step of forming a conductive pattern on a substrate; and a blackening processing step of blackening the surface of the conductive pattern by immersing the conductive pattern in an aqueous solution containing reducing metal ions to oxidize the surface of the conductive pattern, and a conductive pattern prepared therefrom.

Method for preparing conductive pattern and conductive pattern prepared by the method

The present invention relates to a signal modulation apparatus of multicarrier direct sequence spread spectrum communication system. There was a problem that since multiple carrier having different frequencies are modulated by a baseband signal and the results are added to be transmitted, the enveloped variation of transmitted signal is very large. A modulation apparatus of multicarrier direct sequence spread spectrum system is suggested to solve such problems, which can reduce the enveloped variation of transmitted signal by inverting the polarity of baseband signal which modulates one of four carriers in the case when the same baseband signal is used to modulate the multiple carriers and by inverting the plurality of one of two Walsh code pairs having two adjacent indexes by using the characteristics of Walsh function in case when different baseband signals should be used to modulate four carriers.

Modulation apparatus of multicarrier direct sequence spread spectrum communication system

A code synchronization apparatus in a multi-carrier direct sequence spread spectrum communication system and method thereof are disclosed. The purpose of the present invention is to solve the problems that when using the conventional code synchronization apparatus used in a single carrier system, the time necessary for synchronization as well as the complexity of the system are increased. To do this, the present invention discloses a code synchronization apparatus in a multi-carrier direct sequence spread spectrum communication system and method thereof which are capable of obtaining a stabilized code synchronization, using a code synchronization method suitable to the situation to adjust the symbol combining gain and the symbol integration period adaptively to the channel situation.

Code synchronization apparatus of multi-carrier direct sequence spread spectrum communication system

A system for providing a power-efficient soft handoff in a multicarrier CDMA cellular system includes: a determining device for determining a time point when a user of a mobile station executes a handoff operation from one base station to an adjacent base station thereto, during the user communicates with another system's user through the one base station; a providing device for providing handoff request information inclusive of information of the adjacent base station; a base station control device for commanding the one base station and the adjacent base station to transmit stop of information of the another system's user, with non-assigned carrier and for commanding the adjacent base station to transmit start the information of the another system's user, with assigned carrier, in accordance with the hand off request information received through the one base station by the mobile station's user; a base station transmission device for transmitting the information of the another system's user only with the assigned carrier, in accordance with the assignment of carrier of the base station control device; and a receiving device of the mobile station's user for combining and demodulating received signals having different frequencies from the one base station and the adjacent base station.

Method and system for providing a power-efficient soft handoff in a multicarrier CDMA cellular system

In a direct sequence spread spectrum communications system wherein user binary information symbols are spread spectrum modulated and transmitted to the other party, a non-coherent Walsh QPSK and a coherent Walsh QPSK modulation methods, wherein the PN spreading sequences for inphase and quadrature data in a conventional QPSK PN modulation scheme are coded by Walsh sequences indexed by a special rule to reduce the envelope variation of the transmitted signal, can reduce the envelope variation of transmit signal. And, in a direct sequence spread spectrum communications system wherein several user binary information symbols are spread spectrum modulated, the information symbols of each user are covered by user-specified different Walsh codes and transmitted to the other party, a QPSK modulation methods, wherein the polarity of quadrature PN spreading sequence of a user is controlled by a system controller to make the number of users using the quadrature PN sequence equal to that of users using NOT of the sequence, can reduce the envelope variation of transmit signal.

Walsh-QPSK chip modulation apparatus for generating signal waveform in a

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Daejeon, South Korea

Dong Wook Lee