Patents by Inventor Go-Ul CHOI

Go-Ul CHOI 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 catalyst, method of preparing same, and membrane-electrode assembly for fuel cell and fuel cell system including same
    Patent number: 9105936
    Abstract: A fuel cell catalyst includes a platinum-iron (Pt—Fe) alloy having an ordered or disordered face-centered cubic structure or face-centered tetragonal structure. The face-centered cubic structure has a lattice constant ranging from about 3.820 ? to about 3.899 ? (or from about 3.862 ? to about 3.880 ?), and the face-centered tetragonal structure has a first lattice constant ranging from about 3.800 ? to about 3.880 ? (or from about 3.810 ? to about 3.870 ?) and a second lattice constant ranging from about 3.700 ? to about 3.810 ? (or from about 3.710 ? to about 3.800 ?). A membrane-electrode assembly can improve cell performance by including the above catalyst having the relatively high activity and selectivity for an oxidant reduction in at least one of an anode or a cathode, and can increase lifespan by inhibiting catalyst poisoning.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: August 11, 2015
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Myoung-Ki Min, Chan-Hee Park, Chan Kwak, Alexey Alexandrovichserov, Go-Ul Choi, Geun-Seok Chai
  • FUEL CELL CATALYST, METHOD OF PREPARING SAME, AND MEMBRANE-ELECTRODE ASSEMBLY FOR FUEL CELL AND FUEL CELL SYSTEM INCLUDING SAME
    Publication number: 20080248372
    Abstract: A fuel cell catalyst includes a platinum-iron (Pt—Fe) alloy having an ordered or disordered face-centered cubic structure or face-centered tetragonal structure. The face-centered cubic structure has a lattice constant ranging from about 3.820 ? to about 3.899 ? (or from about 3.862 ? to about 3.880 ?), and the face-centered tetragonal structure has a first lattice constant ranging from about 3.800 ? to about 3.880 ? (or from about 3.810 ? to about 3.870 ?) and a second lattice constant ranging from about 3.700 ? to about 3.810 ? (or from about 3.710 ? to about 3.800 ?). A membrane-electrode assembly can improve cell performance by including the above catalyst having the relatively high activity and selectivity for an oxidant reduction in at least one of an anode or a cathode, and can increase lifespan by inhibiting catalyst poisoning.
    Type: Application
    Filed: November 7, 2007
    Publication date: October 9, 2008
    Inventors: Myoung-Ki MIN, Chan-Hee PARK, Chan KWAK, Alexey ALEXANDROVICHSEROV, Go-Ul CHOI, Geun-Seok CHAI