Samsung Electronics Co., Ltd.

Doosan Corporation

Fuelcellpower Co., Ltd.

Fuelcell Power, Inc.

Ho-Suk Kim

Mee-Nam Shinn

Byung-Sun Hong

Seok-jin Kang

Youn-il Ko

Sung-Jin Oh

Myoung-Hoon Choi

Cheol-Nam Yang

Yong-Jung Seo

Du-Hee Kim

Do-Hwan Yu

Yong-Jin Chon

Cheol-Nam 807-601 Jeongdeun Maeul Yang

Yong-Jung; Seo

Sung-Jin; Oh

A lamellar structure graphite foil is used as a material for a separator for a fuel cell, and a hydrophobic layer is formed by impregnation on flow-field channels of the graphite foil. Such a separator is manufactured by forming the flow field channel by etching the graphite foil formed with the mask pattern thereon and forming a hydrophobic layer by impregnation. According to such a separator, performance of a fuel cell stack is enhanced and the manufacturing process of a separator is simplified.

Separator for fuel cell, manufacturing method thereof, and fuel cell having such a separator

The present invention relates to a sealing structure for polymer electrolyte fuel cell, which comprises a bipolar plate with sealing groove to be filled with rubber using a dispenser, and a gasket interposed between the bipolar plate and a membrane electrode assembly. That is, according to the present invention, the thickness deviation in a gasket can be softened by interposing a gasket between a rubber ands a membrane electrode assembly after filling rubber in a sealing groove formed on a bipolar plate using a dispenser. Also, nonuniform stress distribution can be resolved because a gasket covers with a pressure despite the height deviation of rubber, and a stress is not directly transmitted to a membrane electrode assembly and dispersed by a gasket despite nonuniform stress distribution.

Sealing structure for polymer electrolyte fuel cell

The present invention relates to a Membrane Electrode Assembly (MEA) which significantly enhances power density as well as structural reliability and method for producing the same. More specifically, it relates to the Membrane Electrode Assembly which has a plurality of protuberances and method for producing the same. The present invention involves making supporting bodies to have a plurality of protuberances on one side of the supporting bodies, forming a catalyst layer on one side of the supporting bodies having the protuberances, interposing a polymer-electrolyte-membrane between the supporting bodies, aligning the supporting bodies for the protuberances to engage each other; and hot-pressing the aligned supporting bodies. The present invention can increase the area of a three-phase boundary in which oxidation-reduction reaction of hydrogen and oxygen occurs and decrease resistance to ion conduction; consequently fuel cells have the characteristic of a large output of power density.

Method for producing membrane electrode assembly

A high-vacuum packaged microgyroscope for detecting the inertial angular velocity of an object and a method for manufacturing the same. In the high-vacuum packaged microgyroscope, a substrate with an ASIC circuit for signal processing is mounted onto another substrate including a suspension structure of a microgyroscope in the form of a flip chip. Also, the electrodes of the suspension structure and the ASIC circuit can be exposed to the outside through polysilicon interconnection interposed between double passivation layers. The short interconnection between the suspension structure and the ASIC circuit can reduce the device in size and prevents generation of noise, thereby increasing signal detection sensitivity. In addition, by sealing the two substrates at low temperatures, for example, at 363 to 400&deg; C. using co-melting reaction between metal, for example, Au, and Si in a vacuum, the degree of vacuum in the device increases.

High-vacuum packaged microgyroscope and method for manufacturing the same

Growing community of inventors

Seoul, South Korea

Ho-Suk Kim