Patents by Inventor Sumit Kundu

Sumit Kundu 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).

  • Publication number: 20170309924
    Abstract: In solid polymer electrolyte fuel cells, an oxygen evolution reaction (OER) catalyst may be incorporated at the anode along with the primary hydrogen oxidation catalyst for purposes of tolerance to voltage reversal. Incorporating this OER catalyst in a layer at the interface between the anode's primary hydrogen oxidation anode catalyst and its gas diffusion layer can provide greatly improved tolerance to voltage reversal for a given amount of OER catalyst. Further, this improvement can be gained without sacrificing cell performance.
    Type: Application
    Filed: July 13, 2017
    Publication date: October 26, 2017
    Inventors: Sumit Kundu, Scott McDermid, Amy Shun-Wen Yang, Liviu Catoiu, Darija Susac
  • Patent number: 9397357
    Abstract: A membrane electrode assembly for a fuel cell is disclosed, which comprises at least one porous ionomer containing layer disposed at the interface between the cathode electrocatalyst material and the ion exchange membrane of the fuel cell. The porous ionomer containing layer comprises a catalyst migration impeding compound. The membrane electrode assembly exhibits improved stability against Pt dissolution and Pt-band formation within the ion exchange membrane, hence having improved durability and lifetime performance.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: July 19, 2016
    Assignees: Daimler AG, Ford Motor Company
    Inventors: Dmitri Bessarabov, Sumit Kundu, Stephen Lee, Scott McDermid
  • Patent number: 9263748
    Abstract: A membrane electrode assembly (MEA) for a fuel cell which exhibits enhanced reversal tolerance. In particular, a layer of iridium or an iridium compound, preferably metallic iridium or iridium oxide supported on TiO2, is provided on the anode to electrolyze available water and pass the majority of the current during a reversal of the fuel cell, thereby preventing damage to the MEA. The iridium or iridium compound is applied to an anode structure according to a predetermined pattern, with only part of the anode active area containing Ir. The parts of the MEA that do not contain Ir are not expected to suffer degradation from Ir cross-over, so that overall degradation of the cell will be diminished. Having less precious metals will also translate into less cost.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: February 16, 2016
    Assignees: Daimler AG, Ford Motor Company
    Inventors: Hao Zhang, Herwig Haas, Sumit Kundu
  • Publication number: 20150155567
    Abstract: A membrane electrode assembly (MEA) for a fuel cell which exhibits enhanced reversal tolerance. In particular, a layer of iridium or an iridium compound, preferably metallic iridium or iridium oxide supported on TiO2, is provided on the anode to electrolyze available water and pass the majority of the current during a reversal of the fuel cell, thereby preventing damage to the MEA. The iridium or iridium compound is applied to an anode structure according to a predetermined pattern, with only part of the anode active area containing Ir. The parts of the MEA that do not contain Ir are not expected to suffer degradation from Ir cross-over, so that overall degradation of the cell will be diminished. Having less precious metals will also translate into less cost.
    Type: Application
    Filed: February 6, 2015
    Publication date: June 4, 2015
    Inventors: Hao Zhang, Herwig Haas, Sumit Kundu
  • Patent number: 8758955
    Abstract: Ligand additives having two or more coordination sites in close proximity can be used in the polymer electrolyte of membrane electrode assemblies in solid polymer electrolyte fuel cells in order to reduce the dissolution of catalyst, particularly from the cathode, and hence reduce fuel cell degradation over time.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: June 24, 2014
    Assignees: Daimler AG, Ford Motor Company
    Inventors: Jing Li, Keping Wang, Yunsong Yang, Scott McDermid, Sumit Kundu
  • Publication number: 20130022890
    Abstract: In solid polymer electrolyte fuel cells, an oxygen evolution reaction (OER) catalyst may be incorporated at the anode along with the primary hydrogen oxidation catalyst for purposes of tolerance to voltage reversal. Incorporating this OER catalyst in a layer at the interface between the anode's primary hydrogen oxidation anode catalyst and its gas diffusion layer can provide greatly improved tolerance to voltage reversal for a given amount of OER catalyst. Further, this improvement can be gained without sacrificing cell performance.
    Type: Application
    Filed: July 17, 2012
    Publication date: January 24, 2013
    Applicants: Ford Motor Company, Daimler AG
    Inventors: Sumit Kundu, Scott McDermid, Amy Shun-Wen Yang, Liviu Catoiu, Darija Susac
  • Publication number: 20120258382
    Abstract: Ligand additives having two or more coordination sites in close proximity can be used in the polymer electrolyte of membrane electrode assemblies in solid polymer electrolyte fuel cells in order to reduce the dissolution of catalyst, particularly from the cathode, and hence reduce fuel cell degradation over time.
    Type: Application
    Filed: April 7, 2011
    Publication date: October 11, 2012
    Applicants: Ford Motor Company, Daimler AG
    Inventors: Jing Li, Keping Wang, Yunsong Yang, Scott McDermid, Sumit Kundu
  • Publication number: 20110256466
    Abstract: A membrane electrode assembly for a fuel cell is disclosed, which comprises at least one porous ionomer containing layer disposed at the interface between the cathode electrocatalyst material and the ion exchange membrane of the fuel cell. The porous ionomer containing layer comprises a catalyst migration impeding compound. The membrane electrode assembly exhibits improved stability against Pt dissolution and Pt-band formation within the ion exchange membrane, hence having improved durability and lifetime performance.
    Type: Application
    Filed: April 15, 2011
    Publication date: October 20, 2011
    Applicants: FORD MOTOR COMPANY, DAIMLER AG
    Inventors: Dmitri Bessarabov, Sumit Kundu, Stephen Lee, Scott McDermid