Patents by Inventor IRINA A. KOZHINOVA

IRINA A. KOZHINOVA 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).

  • PEMFC electrode mudcrack mitigation at low Pt loading
    Patent number: 10381653
    Abstract: An electrode ink composition that forms a fuel cell catalyst layer with reduced mudcracking is provided. The ink composition includes a solvent, a platinum group metal-containing catalyst composition dispersed in the solvent, a primary polymer dispersed within the solvent, the primary polymer being an ionomer, and a secondary polymer dispersed within the solvent, the secondary polymer interacting with the primary polymer via a non-covalent interaction.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: August 13, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Roland J. Koestner, Swaminatha P. Kumaraguru, Irina A. Kozhinova
  • PEMFC Electrode Mudcrack Mitigation at Low Pt Loading
    Publication number: 20180254489
    Abstract: An electrode ink composition that forms a fuel cell catalyst layer with reduced mudcracking is provided. The ink composition includes a solvent, a platinum group metal-containing catalyst composition dispersed in the solvent, a primary polymer dispersed within the solvent, the primary polymer being an ionomer, and a secondary polymer dispersed within the solvent, the secondary polymer interacting with the primary polymer via a non-covalent interaction.
    Type: Application
    Filed: March 2, 2017
    Publication date: September 6, 2018
    Inventors: ROLAND J. KOESTNER, SWAMINATHA P. KUMARAGURU, IRINA A. KOZHINOVA
  • ELECTRODE DESIGN WITH OPTIMAL IONOMER CONTENT FOR POLYMER ELECTROLYTE MEMBRANE FUEL CELL
    Publication number: 20160064741
    Abstract: A method of making a membrane electrode assembly for a fuel cell, a membrane electrode assembly, a fuel cell and a fuel cell system. The method includes preferentially adsorbing an ionomer and electrocatalyst mixture onto the surface of a porous fuel cell substrate by appropriate treatment of the mixture prior to or contemporaneous with placement of the mixture onto the substrate. This promotes retention of the ionomer-coated electrocatalyst at or near the surface of the substrate where catalytic activity between it and a proton exchange membrane is designed to take place. Retention of the ionomer-coated electrocatalyst near these interfacial regions by the present invention is preferable to having the ionomer and electrocatalyst be significantly absorbed into the substrate.
    Type: Application
    Filed: September 2, 2014
    Publication date: March 3, 2016
    Inventors: Swaminatha P. Kumaraguru, Roland J. Koestner, Irina Kozhinova
  • Hydrophobic Onium Salt Addition to Fuel Cell Electrode Inks for Improved Manufacturability
    Publication number: 20130096215
    Abstract: An ink composition for forming fuel cell electrodes includes a solvent system, an ion-conducting polymer dispersed within the solvent system, a supported catalyst dispersed within the solvent system; and an onium compound having a hydrophobic hydrocarbon moiety. The onium compound is substantially soluble in the solvent system.
    Type: Application
    Filed: October 18, 2011
    Publication date: April 18, 2013
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Roland J. Koestner, Heidi M. Viterise, Irina Kozhinova