Fuel cell

Details Fuel cell Fuel cell

2008-04-01

2008-04-01

Ruthkosky, Mark (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S047000

Reexamination Certificate

active

10424889

ABSTRACT:
A fuel cell comprising a gas-permeable and electrically conducting support substrate having a fuel gas passage formed therein; a fuel-electrode layer formed on said substrate; a solid electrolytic layer formed on said support substrate so as to cover said fuel-electrode layer and containing ZrO2in which rare earth elements are existing in the form of solid solutions; and an oxygen-electrode provided on the solid electrolytic layer so as to face said fuel-electrode layer; wherein said support substrate is formed of a metal of the iron family and/or an oxide of a metal of the iron family, and a rare-earth oxide containing at least one kind of element selected from the group consisting of Y, Lu, Yb, Tm, Er, Ho, Dy, Gd, Sm and Pr. The invention brings a coefficient of thermal expansion of the support substrate close to that of the solid electrolytic layer, and prevents a reduction in the performance of the solid electrolyte caused by the diffusion of elements from the support substrate.

REFERENCES:
patent: 3961987 (1976-06-01), Mund et al.
patent: 4894297 (1990-01-01), Singh et al.
patent: 5391440 (1995-02-01), Kuo et al.
patent: 6887361 (2005-05-01), Visco et al.
patent: 07-029574 (1995-01-01), None

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