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Title: Method and apparatus for gasketing a fuel cell

Abstract

In a solid-oxide fuel cell assembly comprising a plurality of components having electrically-conductive mating surfaces therebetween, the surfaces are sealed by gasket elements that include first and second silver braze alloy layers and a dielectric layer, formed preferably of yttrium-stabilized zirconia (YSZ), disposed between the alloy layers. The alloy is capable of bonding to many ceramics, including YSZ, and is readily brazed to the oxide layer formed on many metals at elevated temperatures. Because the braze alloy is electrically conductive, a dielectric layer must be included to break conductivity in bonding applications where electrical insulation is required. YSZ functions as a reliable insulator and will not crystallize or fracture as do prior art glass insulators. The assembly is useful as an auxiliary power unit in a vehicle.

Inventors:
;
Issue Date:
Research Org.:
Delphi Technologies, Inc., Troy, MI (United States); National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1531529
Patent Number(s):
7217300
Application Number:
10/607,609
Assignee:
Delphi Technologies, Inc. (Troy, MI)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
DOE Contract Number:  
FC26-02NT41246
Resource Type:
Patent
Resource Relation:
Patent File Date: 2003-06-27
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; 36 MATERIALS SCIENCE

Citation Formats

Haltiner, Jr., Karl J., and Reisdorf, Gary F. Method and apparatus for gasketing a fuel cell. United States: N. p., 2007. Web.
Haltiner, Jr., Karl J., & Reisdorf, Gary F. Method and apparatus for gasketing a fuel cell. United States.
Haltiner, Jr., Karl J., and Reisdorf, Gary F. Tue . "Method and apparatus for gasketing a fuel cell". United States. https://www.osti.gov/servlets/purl/1531529.
@article{osti_1531529,
title = {Method and apparatus for gasketing a fuel cell},
author = {Haltiner, Jr., Karl J. and Reisdorf, Gary F.},
abstractNote = {In a solid-oxide fuel cell assembly comprising a plurality of components having electrically-conductive mating surfaces therebetween, the surfaces are sealed by gasket elements that include first and second silver braze alloy layers and a dielectric layer, formed preferably of yttrium-stabilized zirconia (YSZ), disposed between the alloy layers. The alloy is capable of bonding to many ceramics, including YSZ, and is readily brazed to the oxide layer formed on many metals at elevated temperatures. Because the braze alloy is electrically conductive, a dielectric layer must be included to break conductivity in bonding applications where electrical insulation is required. YSZ functions as a reliable insulator and will not crystallize or fracture as do prior art glass insulators. The assembly is useful as an auxiliary power unit in a vehicle.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {5}
}

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Works referenced in this record:

Series planar design for solid electrolyte oxygen pump
patent, May 1998


Fuel Cell Systems Explained, Second Edition
book, February 2003