High temperature fuel cell and high temperature fuel cell stack

Details High temperature fuel cell and high temperature fuel cell stack High temperature fuel cell and high temperature fuel cell stack

1998-08-12

2000-12-05

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 34, H01M 802, H01M 812

Patent

active

061564486

ABSTRACT:
A high temperature fuel cell stack is composed of high temperature fuel cells having interconnecting conducting plates for leading off current produced in the high temperature fuel cell. At least one of the plates is formed of an alloy based on Fe with a Cr content of between 17 and 30% by weight and has an average coefficient of thermal expansion of between 13 and 14.times.10.sup.-6 /K in a temperature range from room temperature to 900.degree. C. Two electrodes are disposed between the plates and supplied with a working medium by the plates. One of the electrodes has a thickness of at least 100 .mu.m and the other a thickness of about 30 .mu.m. An electrolyte is disposed between the two electrodes, contains stabilized ZrO.sub.2 and has a thickness of between 5 and 30 .mu.m. The electrodes and the electrolyte have a coefficient of thermal expansion matched to that of the at least one plate. The material costs for the plates are reduced by a factor of 10 to 20 in comparison with prior art plates.

REFERENCES:
patent: 5518829 (1996-05-01), Satake et al.
"Ceramic and Metallic Components for a Planar SOFC", Ivers-Tiffee et al., 250a Berichte der Bunsengesellschaft fur Physikalische Chemie, 94 (1990), Sep., No. 9, Wewinheim, Germany, pp. 978-981.
"Fuel Cell Handbook", A.J. Appleby et al., 1989, pp. 442-454 No Month Available.
"Brennstoffzellen als Energiewandler", Wolfgang Drenckhahn et al., Energiewirtschaftliche Tagesfragen, Jun. 1993, vol. 6, pp. 382-390.

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