Patents by Inventor Gi Suk Hwang

Gi Suk Hwang 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).

  • Membrane-electrode structures for molecular catalysts for use in fuel cells and other electrochemical devices
    Patent number: 9455451
    Abstract: Water soluble catalysts, (M)meso-tetra(N-Methyl-4-Pyridyl)Porphinepentachloride (M=Fe, Co, Mn & Cu), have been incorporated into the polymer binder of oxygen reduction cathodes in membrane electrode assemblies used in PEM fuel cells and found to support encouragingly high current densities. The voltages achieved are low compared to commercial platinum catalysts but entirely consistent with the behavior observed in electroanalytical measurements of the homogeneous catalysts. A model of the dynamics of the electrode action has been developed and validated and this allows the MEA electrodes to be optimized for any chemistry that has been demonstrated in solution. It has been shown that improvements to the performance will come from modifications to the structure of the catalyst combined with optimization of the electrode structure and a well-founded pathway to practical non-platinum group metal catalysts exists.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: September 27, 2016
    Assignee: The Regents of the University of California
    Inventors: John B. Kerr, Xiaobing Zhu, Gi Suk Hwang, Zulima Martin, Qinggang He, Peter Driscoll, Adam Weber, Kyle Clark
  • Membrane-Electrode Structures for Molecular Catalysts for use in Fuel Cells and other Electrochemical Devices
    Publication number: 20140106255
    Abstract: Water soluble catalysts, (M)meso-tetra(N-Methyl-4-Pyridyl)Porphinepentachloride (M=Fe, Co, Mn & Cu), have been incorporated into the polymer binder of oxygen reduction cathodes in membrane electrode assemblies used in PEM fuel cells and found to support encouragingly high current densities. The voltages achieved are low compared to commercial platinum catalysts but entirely consistent with the behavior observed in electroanalytical measurements of the homogeneous catalysts. A model of the dynamics of the electrode action has been developed and validated and this allows the MEA electrodes to be optimized for any chemistry that has been demonstrated in solution. It has been shown that improvements to the performance will come from modifications to the structure of the catalyst combined with optimization of the electrode structure and a well-founded pathway to practical non-platinum group metal catalysts exists.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 17, 2014
    Inventors: John B. Kerr, Xiaobing Zhu, Gi Suk Hwang, Zulima Hwang, Qinggang He, Peter Driscoll, Adam Weber, Kyle Clark