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).

  • Polymer membrane for fuel cell, method of preparing same, and membrane-electrode assembly for fuel cell comprising same
    Publication number: 20070117000
    Abstract: The polymer electrolyte membrane of the present invention includes polymers having a fluoroalkyl group and a proton conductive group. The present invention also provides a membrane-electrode assembly, a fuel cell system including the polymer electrolyte membrane, and a method of making the polymer electrolyte membrane by a chemical grafting method. The amount of the proton conductive groups in the polymer electrolyte membrane can be controlled, the membrane thickness can be easily controlled, adherence between a polymer electrolyte membrane and an electrode is improved due to the fluoroalkyl of the polymer, and long-term stability of a membrane-electrode assembly is improved.
    Type: Application
    Filed: November 21, 2006
    Publication date: May 24, 2007
    Inventors: Sung-Guk An, Min-Kyu Song, Young-Mi Park, You-Mee Kim, Sang-Il Han, Ho-Jin Kweon, Si-Hyun Lee
  • Micro reforming reactor for fuel cell and method of preparing the same
    Publication number: 20070087935
    Abstract: A micro reforming reactor includes a first substrate with a micro channel having a width of less than 1,000 ?m bonded to a second substrate to form a micro tunnel. An adhesive layer is formed on the internal walls of the micro tunnel using a flow coating method. A catalyst may then be optionally formed on the adhesive coated internal walls of the micro tunnel, also using a flow coating method.
    Type: Application
    Filed: October 19, 2006
    Publication date: April 19, 2007
    Inventors: Ju-Yong Kim, Ho-Jin Kweon, Jae-Jeong Kim, Oh-Joong Kwon, Sun-Mi Hwang
  • Fuel cell and fuel cell system with the same
    Publication number: 20070072052
    Abstract: A fuel cell is provided. The fuel cell includes a medium member. Unit areas are formed at both sides of the medium member. The unit areas include outlets and inlets which allow a fuel to flow. First path members which have first flowpaths for circulating the fuel are disposed at the unit areas. Membrane-electrode assemblies are connected to the respective first path members. Second path members which have second flowpaths for circulating air are connected to the respective membrane-electrode assemblies.
    Type: Application
    Filed: September 28, 2006
    Publication date: March 29, 2007
    Inventors: Seong-Jin An, Hee-Tak Kim, Seung-Shik Shin, Yeong-Chan Eun, Ho-Jin Kweon
  • Electronic device having fuel cell system
    Publication number: 20070059578
    Abstract: There is provided an electronic device including an electronic device main body and a fuel cell main body which has an electricity generator for generating electrical energy and is rotated with respect to the electronic device main body. The electricity generator includes first and second electrode layers and an electrolyte membrane interposed between the first and second electrode layers, an anode portion corresponding to the first electrode layer, and a cathode portion corresponding to the second electrode layer.
    Type: Application
    Filed: September 5, 2006
    Publication date: March 15, 2007
    Inventor: Ho-Jin Kweon
  • Membrane-electrode assembly for fuel cell and fuel cell system comprising the same
    Publication number: 20070026291
    Abstract: The present invention relates to a membrane-electrode assembly and a fuel cell system including the membrane-electrode assembly. The membrane-electrode assembly includes a corrugated polymer electrolyte membrane and an anode and a cathode respectively disposed at each side of the polymer electrolyte membrane. The corrugated polymer electrolyte membrane has a pattern on its surface, and the corrugated surface of the polymer electrolyte membrane increase an area of an interface between the polymer electrolyte membrane and a catalyst layer. The present invention provides a fuel cell system with high power and high performance by adapting the corrugated polymer electrolyte membrane to a membrane-electrode assembly of a fuel cell.
    Type: Application
    Filed: July 27, 2006
    Publication date: February 1, 2007
    Inventors: Hee-Tak Kim, Ho-Jin Kweon
  • Membrane-electrode assembly for fuel cell and fuel cell system comprising same
    Publication number: 20070026293
    Abstract: A membrane-electrode assembly constructed with an anode and a cathode facing each other, and a polymer electrolyte membrane disposed therebetween. At least one of the anode and the cathode includes an electrode substrate that includes a carbon fiber based sheet coated with micro-carbons and a catalyst layer disposed on the electrode substrate with the micro-carbons contacting the catalyst layer.
    Type: Application
    Filed: July 31, 2006
    Publication date: February 1, 2007
    Inventors: Hee-Tak Kim, Ho-Jin Kweon
  • Direct oxidation fuel cell system
    Publication number: 20070026270
    Abstract: The present invention relates to a direct oxidation fuel cell system including at least one electricity generating element including at least one membrane-electrode assembly which includes an anode and a cathode on opposite sides of a polymer electrolyte membrane, and a separator. The direct oxidation fuel cell generates electricity through an electrochemical reaction of a fuel and an oxidant. An oxidant supplier supplies the electricity generating element with the oxidant. A fuel supplier supplies the anode with a combination of fuel and hydrogen to provide improved power output.
    Type: Application
    Filed: July 21, 2006
    Publication date: February 1, 2007
    Inventors: In-Hyuk Son, Si-Hyun Lee, Ho-Jin Kweon
  • Binder composition for fuel cell, membrane-electrode assembly for fuel cell, and method for preparing the membrane-electrode assembly
    Publication number: 20070020507
    Abstract: The present invention relates to a binder composition for a fuel cell including a proton conductor and one or more binders selected from the group consisting of poly[2,2?-(m-phenylene)-5,5?-bibenzimidazole] (PBI), poly[2,5-benzimidazole] (ABPBI), polybenzoxazole (PBO), and polybenzothiazole (PBT).
    Type: Application
    Filed: June 23, 2005
    Publication date: January 25, 2007
    Inventors: Hyoung-Juhn Kim, Yeong-Chan Eun, Seong-Jin An, Sung-Yong Cho, Ju-Yong Kim, Hae-Kwon Yoon, Ho-Jin Kweon
  • Positive active material composition for rechargeable lithium battery and method of preparing positive electrode using same
    Publication number: 20060292446
    Abstract: A positive active material composition for a rechargeable battery includes a positive active material selected from compounds represented by formulas 1 to 13, and at least one semi-metal, metal or oxides thereof: LixMnA2??(1) LixMnO2?zAz??(2) LixMn1?yM?yA2??(3) LixMn2A4??(4) LixMn2O4?zAz??(5) LixMn2?yM?yA4??(6) LixBA2??(7) LixBO2?zAz??(8) LixB1?yM?yA2??(9) LixB1?yM?yO2?zAz??(10) LixNiCoO2?zAz??(11) LixNiCoO2?zAz??(12) LixNi1?y?zCoyM?zA2??(13) where 1.0?x?1.1, 0.01?y?0.1, 0.01?z?0.5, M? is at least one transition metal or lanthanide metal selected from Al, Cr, Co, Mg, La, Ce, Sr, or V, M? is at least one transition metal or lanthanide metal selected from Al, Cr, Mn, Fe, Mg, La, Ce, Sr or V, A is selected from 0, F, S or P, and B is Ni or Co.
    Type: Application
    Filed: August 25, 2006
    Publication date: December 28, 2006
    Inventors: Ho-Jin Kweon, Geun-Bae Kim, Hyun-Suk Jeong, Dong-Gon Park, Ki-Ho Kim
  • Polymer membrane and membrane-electrode assembly for fuel cell and fuel cell system comprising same
    Publication number: 20060292415
    Abstract: The polymer electrolyte membrane of the present invention includes a proton conductive cation exchange resin, a non-proton-conductive polymer, and an inorganic additive. The inorganic additive is adapted to inhibit a phase separation between the proton conductive cation exchange resin and the non-proton-conductive polymer.
    Type: Application
    Filed: June 28, 2006
    Publication date: December 28, 2006
    Inventors: Min-Kyu Song, You-Mee Kim, Ho-Jin Kweon, Hee-Woo Rhee
  • Catalyst composite material fuel cell, method for preparing the same, membrane-electrode assembly comprising the same, and fuel cell system comprising the same
    Publication number: 20060275648
    Abstract: The present invention relates to a catalyst composite material which includes a catalyst characterized by oxygen-reducing activity and which is selected from the group consisting of metals, metal oxides, and combinations thereof, and a resin layer which covers at least a portion of the surface of the catalyst and comprises an anion exchange resin layer and a cation exchange resin layer.
    Type: Application
    Filed: March 28, 2006
    Publication date: December 7, 2006
    Inventors: Hee-Tak Kim, Chan Kwak, Ho-Jin Kweon
  • Active material for battery and method of preparing the same
    Publication number: 20060269659
    Abstract: An active material for a battery has a surface treatment layer that includes a conductive agent and at least one coating-element-containing compound selected from the group consisting of a coating-element-containing hydroxide, a coating-element-containing oxyhydroxide, a coating-element-containing oxycarbonate, a coating-element-containing hydroxycarbonate, and a mixture thereof.
    Type: Application
    Filed: August 4, 2006
    Publication date: November 30, 2006
    Applicant: Samsung SDI Co., Ltd
    Inventors: Ho-Jin Kweon, Jun-Won Suh, Jang-Ho Yoon, Jung-Joon Park
  • Positive active material for rechargeable lithium battery and method of preparing same
    Patent number: 7138209
    Abstract: Disclosed is a positive active material for a rechargeable lithium battery. The positive active material includes a core and a surface-treatment layer on the core. The core includes at least one lithiated compound and the surface-treatment layer includes at least one coating material selected from the group consisting of coating element included-hydroxides, oxyhydroxides, oxycarbonates, hydroxycarbonates and any mixture thereof.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: November 21, 2006
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Ho-Jin Kweon, Joon-Won Suh
  • Electrode substrate for a fuel cell, a method for preparing the same, and a membrane-electrode assembly comprising the same
    Publication number: 20060257641
    Abstract: An electrode substrate for a fuel cell including a diffusion layer, a first microporous layer that embeds into the diffusion layer, with the first microporous layer having a thickness in the range of 10 to 30 ?m, and a second microporous layer that forms a boundary with the diffusion layer on the surface of the first microporous layer. The electrode substrate has improved performance such as increased diffusion properties of a fuel or an oxidant, increased properties of releasing moisture, and enhanced electron conductivity.
    Type: Application
    Filed: May 10, 2006
    Publication date: November 16, 2006
    Inventors: Sung-Yong Cho, Jong-Ki Lee, Yeong-Chan Eun, Ho-Jin Kweon
  • Polymer electrolyte for a direct oxidation fuel cell, method of preparing the same, and direct oxidation fuel cell comprising the same
    Publication number: 20060251945
    Abstract: A polymer electrolyte membrane for a direct oxidation fuel cell includes a porous polymer supporter having a plurality of pores, and a hydrocarbon fuel diffusion barrier layer which is formed on the polymer supporter and contains an inorganic additive dispersed in a cation exchange resin.
    Type: Application
    Filed: October 14, 2005
    Publication date: November 9, 2006
    Inventors: Min-Kyu Song, You-Mee Kim, Ho-Jin Kweon, Hee-Woo Rhee
  • Positive active material for rechargeable lithium battery and method of preparing same
    Publication number: 20060246352
    Abstract: A positive active material for a rechargeable lithium battery. The positive active material includes a core and a surface-treatment layer on the core. The core includes at least one lithiated compound and the surface-treatment layer includes at least one coating material selected from the group consisting of coating element included-hydroxides, oxyhydroxides, oxycarbonates, hydroxycarbonates and any mixture thereof.
    Type: Application
    Filed: May 23, 2006
    Publication date: November 2, 2006
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Ho-Jin Kweon, Joon-Won Suh
  • Stack having reforming function and fuel cell system having the same
    Publication number: 20060210845
    Abstract: There is provided a fuel cell system comprising: a stack including at least one electricity generator generating electric energy through a reaction between hydrogen and oxygen and a fuel processing unit which is integrally coupled to the electricity generator and which generates hydrogen from fuel and supplies the generated hydrogen to the electricity generator; a fuel supply unit supplying the fuel to the fuel processing unit; and an oxygen supply unit supplying oxygen to the electricity generator and the fuel processing unit.
    Type: Application
    Filed: February 1, 2006
    Publication date: September 21, 2006
    Inventors: Ju-Yong Kim, Ho-Jin Kweon, Seong-Jin An
  • Active material having surface treatment layer for battery and method of preparing the same
    Patent number: 7108944
    Abstract: An active material for a battery has a surface treatment layer that includes a conductive agent and at least one coating-element-containing compound selected from the group consisting of a coating-element-containing hydroxide, a coating-element-containing oxyhydroxide, a coating-element-containing oxycarbonate, a coating-element-containing hydroxycarbonate, and a mixture thereof.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: September 19, 2006
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Ho-Jin Kweon, Jun-Won Suh, Jang-Ho Yoon, Jung-Joon Park
  • Fuel cell system
    Publication number: 20060204804
    Abstract: A fuel cell system includes a stack for generating electrical energy through electrochemical reaction between a fuel and oxygen and supplying the electrical energy to a load, a fuel supply unit for supplying the fuel to the stack, an oxygen supply unit for supplying the oxygen to the stack, and a comparator coupled to the stack to compare an electricity output value of the stack with a reference electricity output value corresponding to the load and to selectively electrically connect the stack to the load according to the electricity output value.
    Type: Application
    Filed: March 8, 2006
    Publication date: September 14, 2006
    Inventors: Ri-A Ju, Jin-Hong An, Ho-Jin Kweon, Jong-Ki Lee, Sang-Hyeon Choi
  • Membrane-electrode assembly, method for preparing the same, and fuel cell system comprising the same
    Publication number: 20060199070
    Abstract: The invention relates to a membrane-electrode assembly for a fuel cell, a method for preparing the same, and a fuel cell system comprising the same. The membrane-electrode assembly comprises a polymer electrolyte membrane, a catalyst layer spray-coated directly on both surfaces of the polymer electrolyte membrane; and a gas diffusion layer disposing both outer surfaces of the catalyst layer; and a method for preparing the same, and a fuel cell system comprising the same.
    Type: Application
    Filed: March 6, 2006
    Publication date: September 7, 2006
    Inventors: Myoung-Ki Min, Hae-Kwon Yoon, Jan-Dee Kim, Hye-A Kim, Ho-Jin Kweon