Solid oxide electrolyte type fuel cell and method for fabricatin

Details Solid oxide electrolyte type fuel cell and method for fabricatin Solid oxide electrolyte type fuel cell and method for fabricatin

1991-09-05

1993-06-08

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 40, 427115, 264 61, H01M 810, H01M 486

Patent

active

052178226

ABSTRACT:
A solid oxide electrolyte type fuel cell includes an anode plate made of a porous sintered material composed essentially of (i) partially stabilized zirconia composed of zirconia and magnesia and (ii) nickel, and a solid oxide electrolyte element superimposed on the anode plate and composed of zirconia stabilized with yttria. The anode plate is fabricated by mixing a powder of zirconia partially stabilized with magnesia and a powder of nickel oxide, molding the mixture, sintering the mixture, and then reducing the sintered body in a reducing atmosphere, e.g., hydrogen. Magnesia is added preferably in the amount of 7 to 10% by mole. Addition of the zirconia partially stabilized with magnesia in an amount of 40 to 70% by weight based on total amount of nickel oxide plus the partially stabilized zirconia results in the coefficient of thermal expansion of the cermet matching that of the zirconia stabilized with yttria to an accuracy of .+-.5%.

REFERENCES:
patent: 4614628 (1986-09-01), Hsu et al.
patent: 4702971 (1987-10-01), Isenberg
patent: 4767518 (1988-08-01), Maskalick
patent: 4812329 (1989-03-01), Isenberg
patent: 5035962 (1991-07-01), Jensen
Proceedings of the 23rd Intersociety Energy Conversion Engineering Conference, vol. 2, Jul./Aug. 1988, pp. 218-219.

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