Hybrid molten carbonate fuel cell with unique sealing
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United States of America Patent
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Sep 22, 1998
Grant Date -
N/A
app pub date -
Aug 5, 1997
filing date -
Aug 5, 1997
priority date (Note) -
Expired
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Abstract
A hybrid internal/external manifolded fuel cell stack comprising a plurality of fuel cell units, each of which comprises an anode and a cathode and an electrolyte in contact on one side with an electrolyte facing face of the anode and in contact on the opposite side with an electrolyte facing face of the cathode. A separator plate separates each of the fuel cell units between an anode and cathode forming an anode chamber between the anode facing face of the separator plate and the anode and forming a cathode chamber between the opposite cathode facing face of the separator plate and the cathode of an adjacent fuel cell unit. The anode chamber is in gas communication with a fuel gas supply and outlet provided through internal manifolds whereas the cathode chamber is in gas communication with an oxidant gas supply and outlet provided through external manifolds. Each of the separator plates, in addition to a wet seal structure for providing a wet seal between the separator plates and the electrolyte under cell operating conditions also comprises a dry peripheral seal structure at a distance from the peripheral wet seal structure, thereby forming a gap therebetween.
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