Patents by Inventor Ho-Jin Kweon

Ho-Jin Kweon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fuel cell stack and fuel cell system having the same
    Publication number: 20060172163
    Abstract: There is provided a stack of a fuel cell system in which one or more electricity generators including separators disposed at both sides of a membrane-electrode assembly are stacked, the stack comprising heat releasing means for releasing heat generated from the electricity generators. The heat releasing means have different heat release rates depending on the positions of the associated electricity generators in the stack. In particular, the heat releasing means associated with the electricity generators located near the center of the stack have a higher heat release rate in order to maintain a more even temperature gradient across the stack.
    Type: Application
    Filed: July 14, 2005
    Publication date: August 3, 2006
    Inventors: Jun-Won Suh, Ho-Jin Kweon
  • Fuel cell system
    Publication number: 20060172160
    Abstract: The fuel cell system includes a fuel supply unit for supplying a fuel containing hydrogen, an oxygen supply unit for supplying oxygen, an electricity generation unit for generating electricity through an electro-chemical reaction of the fuel supplied by the fuel supply unit or the hydrogen generated from the fuel, and the oxygen supplied by the oxygen supply unit, and a poison removing unit for removing a catalyst poison comprising carbon monoxide by applying a reverse voltage to the electricity generation unit when a voltage drops below a reference value due to catalyst poisoning of the electricity generation unit by the carbon monoxide.
    Type: Application
    Filed: February 1, 2006
    Publication date: August 3, 2006
    Inventors: Myoung-Ki Min, Ri-A Ju, Ho-Jin Kweon
  • All-in-one type hybrid fuel cell system
    Publication number: 20060172158
    Abstract: A hybrid fuel cell system includes a fuel supply unit for supplying a fuel containing hydrogen, an oxygen supply unit for supplying oxygen, at least one electricity generation unit for generating electricity through an electrochemical reaction of the fuel supplied by the fuel supply unit and the oxygen supplied by the oxygen supply unit, and at least one electro-chemical capacitor disposed in the electricity generation unit.
    Type: Application
    Filed: February 1, 2006
    Publication date: August 3, 2006
    Inventors: Myoung-Ki Min, Ho-Jin Kweon
  • Polymer electrolyte membrane for fuel cell, method for preparing the same, and fuel cell system comprising the same
    Publication number: 20060166069
    Abstract: The polymer electrolyte membrane for a fuel cell comprises a hygroscopic substrate and a proton conductive polymer disposed at the inside, one side, and/or both sides of the hygroscopic substrate.
    Type: Application
    Filed: January 26, 2006
    Publication date: July 27, 2006
    Inventors: Myoung-Ki Min, Hye-A Kim, Ho-Jin Kweon
  • Polymer electrode membrane for fuel, and membrane-electrode assembly and fuel cell system comprising the same
    Publication number: 20060154128
    Abstract: The present invention provides a polymer electrolyte membrane for a fuel cell, including a porous membrane including ceramic fibers crisscrossed in a network and pores formed by the ceramic fibers coalesced at intersection points, and a proton conductive polymer inside the pores.
    Type: Application
    Filed: January 11, 2006
    Publication date: July 13, 2006
    Inventors: Hee-Tak Kim, Ho-Jin Kweon
  • Device comprising multi-layered thin film having excellent adhesive strength and method for fabricating the same
    Publication number: 20060145349
    Abstract: A device comprises a multi-layered thin film having excellent adhesion due to the method of fabricating the same. More particularly, the device includes a multi-layered thin film consisting of a tantalum nitride layer, a tantalum layer formed on the tantalum nitride layer, and a gold thin film formed on the tantalum layer.
    Type: Application
    Filed: October 14, 2005
    Publication date: July 6, 2006
    Inventors: Ju-Yong Kim, Ho-Jin Kweon, Jae-Jeong Kim, Jin-Goo Ahn, Oh-Joong Kwon
  • Separator for fuel cell, method for preparing the same, and fuel cell stack comprising the same
    Publication number: 20060134501
    Abstract: The metal separator for a fuel cell of the present invention includes a metal substrate having reactant flow pathways and an electro-conductive anti-corrosion coating layer. The electro-conductive anti-corrosion coating layer covers the surface of the metal substrate on which the reactant flow pathways are formed. The coating layer may include metal carbides, metal oxides, and metal borides. A metal layer for improving adherence is formed between the surface of the metal substrate on which the reactant flow pathways are formed, and the electro-conductive anti-corrosion coating layer.
    Type: Application
    Filed: November 23, 2005
    Publication date: June 22, 2006
    Inventors: Jong-Ki Lee, Ho-Jin Kweon, Jun-Won Suh
  • Electrode for fuel cell, fuel cell comprising the same, and method for preparing the same
    Publication number: 20060115711
    Abstract: An electrode for a fuel cell of the present invention includes an electrode substrate, a microporous layer formed on the surface of the electrode substrate, and a nano-carbon layer formed on the surface of the microporous layer with a catalyst layer coated on the surface of the nano-carbon layer. Alternatively, an electrode for a fuel cell includes an electrode substrate in which carbon particles are dispersed, a nano-carbon layer on the electrode substrate, and a catalyst layer on the nano-carbon layer.
    Type: Application
    Filed: November 28, 2005
    Publication date: June 1, 2006
    Inventors: Hee-Tak Kim, Ho-Jin Kweon, Jong-Ki Lee
  • Electrode for fuel cell, fuel cell system comprising the same, and method for preparing the same.
    Publication number: 20060115712
    Abstract: The electrode for a fuel cell of the present invention includes a carbonaceous electrode substrate, a microporous layer formed on the surface of the electrode substrate with the microporous layer including a carbonized polymer, and nano-carbon formed on the surface of the microporous layer with a catalyst layer coated on the surface of the nano-carbon. Alternatively, an electrode for a fuel cell includes a carbonaceous electrode substrate in which carbon particles are dispersed, a nano-carbon on the electrode substrate with a catalyst layer on the surface of the nano-carbon.
    Type: Application
    Filed: November 28, 2005
    Publication date: June 1, 2006
    Inventors: Hee-Tak Kim, Jan-Dee Kim, Ho-Jin Kweon
  • Reformer of fuel cell system
    Publication number: 20060112637
    Abstract: A reformer of a fuel cell system includes a heat source unit for generating heat, a reforming reaction unit for generating a reforming gas containing hydrogen from a fuel through a fuel reforming reaction using the heat, a carbon monoxide reducing unit connected to a reforming reaction unit to reduce a concentration of carbon monoxide contained in the reforming gas, and a thermal treatment unit disposed outside the reforming reaction unit and the carbon monoxide reducing unit to adjust the thermal energy supplied to the reforming reaction unit and the carbon monoxide reducing unit.
    Type: Application
    Filed: October 19, 2005
    Publication date: June 1, 2006
    Inventors: Seong-Jin An, Ju-Yong Kim, Ho-Jin Kweon
  • Separator for fuel cell system, and method for preparing the same
    Publication number: 20060110648
    Abstract: A metal separator for a fuel cell of the present invention includes a metal substrate having a reactant flow pathway, and a metal nitride coating layer. The metal nitride coating layer covers the surface of the metal substrate on which a reactant flow pathway is formed and slurry-coated. A metal layer for improving adherence is formed between the surface of the metal substrate on which a reactant flow pathway is formed, and the electro-conductive metal nitride coating layer. The metal separator is suitable for a fuel cell since it is lightweight, and has excellent anti-corrosion and electric conductivity.
    Type: Application
    Filed: November 23, 2005
    Publication date: May 25, 2006
    Inventors: Jong-Ki Lee, Ho-Jin Kweon, Jun-Won Suh
  • Electrode for fuel cell, and membrane-electrode assembly and fuel cell system comprising the same
    Publication number: 20060105227
    Abstract: The electrode for a fuel cell of the present invention includes a catalyst layer and an electrode substrate supporting the catalyst layer, where the electrode substrate includes a hydrophilic region and a hydrophobic region separated from each other. The hydrophilic region and the hydrophobic region that are separated from each other can easily release water produced at the cathode, and thereby prevent clogging of pores of the membrane by water, and smoothly diffuse the reactants resulting in obtaining a high current density.
    Type: Application
    Filed: November 2, 2005
    Publication date: May 18, 2006
    Inventors: Hee-Tak Kim, Jong-Ki Lee, Jan-Dee Kim, Hae-Kwon Yoon, Ho-Jin Kweon, Young-Mi Park
  • Fuel cell system
    Publication number: 20060105212
    Abstract: A fuel cell system including: at least one electricity generator for generating electric energy through a reaction between fuel and oxygen and for discharging the remaining fuel; a fuel supply unit for supplying a predetermined amount of fuel to the electricity generator; an oxygen supply unit for supplying oxygen to the electricity generator; a valve unit which is connected to a fuel discharger of the electricity generator and which adjusts a fuel pressure in the electricity generator; a sensor unit which is disposed in the electricity generator and which senses an output amount of electricity of the electricity generator; and a control unit which converts a sensed signal from the sensor unit into a predetermined control signal and which controls the valve unit with the predetermined control signal.
    Type: Application
    Filed: October 14, 2005
    Publication date: May 18, 2006
    Inventors: Seong-Jin An, Jong-Ki Lee, Jun-Won Suh, Sung-Yong Cho, Yeong-Chan Eun, Jan-Dee Kim, Ho-Jin Kweon
  • Catalyst for a fuel cell, a method of preparing the same, and a fuel cell system comprising the same
    Publication number: 20060099483
    Abstract: The catalyst for a fuel cell of the present invention includes a compound including at least one element selected from the group consisting of silicon, aluminum, and titanium, and a catalytic metal.
    Type: Application
    Filed: October 28, 2005
    Publication date: May 11, 2006
    Inventors: Myoung-Ki Min, Chan-Hee Park, Hye-A Kim, Chan Kwak, Ho-Jin Kweon
  • Catalyst for fuel cell, method for preparing the same, and membrane-electrode assembly and fuel cell system comprising same
    Publication number: 20060093892
    Abstract: The present invention includes a catalyst for a fuel cell which contains a transition element core, and a surface layer that contains at least one selected from the group including platinum, a platinum-transition element alloy, and a combination thereof, and that exists on the surface of the core. The catalyst being prepared without a surfactant.
    Type: Application
    Filed: October 28, 2005
    Publication date: May 4, 2006
    Inventors: Myoung-Ki Min, Chan-Hee Park, Hye-A Kim, Chan Kwak, Ho-Jin Kweon, Hasuck Kim
  • Fuel cell stack and fuel cell system having the same
    Publication number: 20060063045
    Abstract: A cooling system for a fuel cell stack is provided. The fuel cell stack includes an electricity generating assembly having a plurality of unit cells, wherein each of the unit cells comprises common passages. An oxidant used to generate electric energy and a coolant used to cool the stack may both flow through the common passages.
    Type: Application
    Filed: September 15, 2005
    Publication date: March 23, 2006
    Inventors: Jun-Won Suh, Young-Seung Na, Seong-Jin An, Ho-Jin Kweon
  • Electrode for fuel cell and fuel cell comprising same
    Publication number: 20060057452
    Abstract: The present invention relates to an electrode for a fuel cell containing a catalyst layer, a gas diffusion layer including a conductive substrate, and a micro-porous layer interposed between the catalyst layer and the gas diffusion layer and including a conductive material and a dispersant.
    Type: Application
    Filed: August 25, 2005
    Publication date: March 16, 2006
    Inventors: Jan-Dee Kim, Yeong-Chan Eun, Seong-Jin An, Sung-Yong Cho, Ho-Jin Kweon
  • Reformer and fuel cell system having the same
    Publication number: 20060051262
    Abstract: A fuel cell system is provided comprising: a reformer for generating hydrogen from hydrogen-containing fuel; and at least one electricity generator for generating electric energy through an electrochemical reaction of hydrogen and oxygen. The reformer includes a main body in which a plurality of reaction sections for generating hydrogen from hydrogen-containing fuel is integrally formed. A heating section is disposed in contact with the main body in order to supply different amounts of thermal energy to the plurality of reaction sections.
    Type: Application
    Filed: August 31, 2005
    Publication date: March 9, 2006
    Inventors: Zin Park, Ju-Yong Kim, Ji-Seong Han, Hyun-Jeong Lim, Eun-Suk Cho, Ho-Jin Kweon
  • Fuel cell stack having improved cooling structure
    Publication number: 20060046118
    Abstract: A cooling system for a fuel cell stack is provided. The fuel cell stack includes electricity generators generating electric energy through an electrochemical reaction between hydrogen and oxygen, and separators between the electricity generators. It may also contain cooling plates between the electricity generators. Cooling channels including main channels and branch channels coupling the main channels together are formed in the separators or the cooling plates. The intersection of the main and branch cooling channels forms grid-shaped areas with pillars in between that are rectangular, triangular, circular, shaped like a parallelogram, or formed in a combination of these shapes. The cooling channels increase the contact area between the coolant and the separators or the cooling plates and therefore the cooling efficiency of a stack.
    Type: Application
    Filed: August 23, 2005
    Publication date: March 2, 2006
    Inventors: Dong-Myung Suh, Ho-Jin Kweon
  • Reformer and fuel cell system having the same
    Publication number: 20060014056
    Abstract: A fuel cell system comprises a reformer for generating hydrogen from fuel, at least one electricity generator for generating electric energy through an electrochemical reaction between hydrogen and oxygen, a fuel supply unit for supplying the fuel to the reformer and an oxygen supply unit for supplying oxygen to the electricity generator. The reformer includes a main body which has an inner space with a reformer inlet and a reformer outlet. A reaction section is disposed within the inner space of the main body. The reaction section includes a heat-generating element for generating thermal energy from externally applied energy such as electrical current. The heat-generating element has a corrugated structure with a catalyst layer formed on the surface. The corrugated structure defines a plurality of flow passages for the fuel and encourages both even flow distribution and turbulent flow.
    Type: Application
    Filed: June 22, 2005
    Publication date: January 19, 2006
    Inventors: Zin Park, Ju-Yong Kim, Ji-Seong Han, Hyun-Jeong Lim, Eun-Suk Cho, Ho-Jin Kweon, Bok-Hwan Jung