Patents by Inventor Gijsbertus Rietveld

Gijsbertus Rietveld 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).

  • Patent number: 8349395
    Abstract: The invention relates to a electrically conductive steel-ceramic connection comprising a steel interconnector and an electrically conductive ceramic joining layer arranged thereon. The interconnector comprises a ferritic steel containing Cr in a quantity ranging from 18 to 24% by weight. The ceramic layer contains perovskite of a formula Ln1-xSrxMn1-yCoyO3-? or Ln1-xSrxFe1-yCoyO3-?, wherein 0.1?x?0.4, 0.1?y?0.6, 0???x/2 and Ln=La—Lu. The inventive steel-ceramic connection is usable for a high-temperature fuel cell and regularly exhibits good adhesive properties and a low transition resistance (initial transition resistance R approximately equal to 0.01 ?cm2). Said steel-ceramic connection makes it possible to advantageously introduce a ferritic steel into high-temperature fuel cells. The inventive method for producing said steel-ceramic connection consists in pre-treating an inserted ceramic powder exhibiting good sinterability during an assembly process and during the fuel cell operation.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: January 8, 2013
    Assignees: Forschungszentrum Jülich GmbH, Topsoe Fuel Cell A/S
    Inventors: Joachim Laatsch, Frank Tietz, Niels Christiansen, Petru Gordes, Gijsbertus Rietveld, Nicolaas J. J. Dekker
  • Publication number: 20080118803
    Abstract: A fuel cell is constructed as anode-supported solid oxide fuel cell, but can also be used with electrolyte- and metal-supported solid oxide fuel cells. The anode and electrolyte are larger than the cathode and the portion of the anode/electrolyte protruding beyond the cathode is provided with a peripheral seal. The anode-/electrolyte/cathode combination is provided with a flow/gas distribution grid on both the anode and the cathode side. The anode/cathode combination including the flow/gas distribution grids is enclosed between two separator plates, an auxiliary plate and a spacer. The auxiliary plate is designed for external feeding and discharge of a cathode gas, while the separator plate and the auxiliary plate are provided with openings for internal feeding/discharge of anode gas. The auxiliary plate and spacer are solder joined to the separator plate. Several fuel cells of the invention can be used to form a cell stack.
    Type: Application
    Filed: August 18, 2005
    Publication date: May 22, 2008
    Applicant: STICHTING ENERGIEONDERZOEK CENTRUM NEDERLAND
    Inventors: Nicolaas Jacobus Joseph Dekker, Gerard Jan Kraaij, Gijsbertus Rietveld
  • Publication number: 20070178004
    Abstract: The invention relates to a electrically conductive steel-ceramic connection comprising a steel interconnector and an electrically conductive ceramic joining layer arranged thereon. The interconnector comprises a ferritic steel containing Cr in a quantity ranging from 18 to 24% by weight. The ceramic layer contains perovskite of a formula Ln1-xSrxMn1-yCoyO3-? or Ln1-xSrxFe1-yCOyO3-?, wherein 0.1?x?0.4, 0.1?y?0.6, 0???x/2 and Ln=La—Lu. The inventive steel-ceramic connection is usable for a high-temperature fuel cell and regularly exhibits good adhesive properties and a low transition resistance (initial transition resistance R approximately equal to 0.01 ?cm2). Said steel-ceramic connection makes it possible to advantageously introduce a ferritic steel into high-temperature fuel cells. The inventive method for producing said steel-ceramic connection consists in pre-treating an inserted ceramic powder exhibiting good sinterability during an assembly process and during the fuel cell operation.
    Type: Application
    Filed: March 16, 2005
    Publication date: August 2, 2007
    Inventors: Joachim Laatsch, Frank Tietz, Niels Christiansen, Petru Gordes, Gijsbertus Rietveld, Nicolaas Dekker
  • Publication number: 20060127746
    Abstract: Cathode-supported fuel cell wherein the cathode support comprises a porous part made of an alloy containing iron and chromium and more particularly stainless steel. The anode has a thickness of 1-50 ?m and preferably consists of nickel/nickel oxide. The cathode preferably consists of LSM material. Such an electrode-supported fuel cell can be produced by providing a metallic support containing at least iron or chromium by means of sintering, preferably starting form a powder, successively applying thereto an electrode, electrolyte and other electrodes. With this method a cathode is applied to the metallic support and the combination obtained is sintered at a temperature between 1000 and 1200° C.
    Type: Application
    Filed: September 29, 2003
    Publication date: June 15, 2006
    Inventors: Gijsbertus Rietveld, Gerry Martina Van Druten