Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Patent
1993-10-12
1995-08-29
Willis, Jr., Prince
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
429 26, 429 31, 429 32, 429 33, 429 34, 296231, H01M 802
Patent
active
054459028
ABSTRACT:
A method for operating a power generator in which a solid oxide fuel cell is used as a power-generating element and an air electrode of the solid oxide fuel cell is composed of lanthanum manganite, the method involving the step of setting a heating rate and a cooling rate at least in a temperature range of 800.degree. C. to 900.degree. C. at not less than 3.degree. C./min. when the fuel cell is heated up to an operating temperature at the time of starting the power generator and when the fuel cell is cooled from the operating temperature at the time of stopping the power generator. Alternatively, the method involves the step of setting a partial pressure of oxygen, at least in a temperature range of 800.degree. C. to 900.degree. C., in an atmosphere to which the air electrode is exposed, to at not less than 10.sup.-15 arms but not more than 10.sup.-1 arms when the fuel cell is heated up to an operating temperature at the time of starting the power generator and when the fuel cell is cooled from the operating temperature at the time of stopping the power generator.
REFERENCES:
patent: 4686158 (1987-08-01), Nishi et al.
patent: 4799936 (1989-01-01), Riley
patent: 4950562 (1990-08-01), Yoshida et al.
Journal Of The Electrochemical Society, vol. 136, No. 9, 9 Sep. 1989, Manchester, New Hampshire, U.S., pp. 2604-2606, Toshihiko Yoshida et al., "Properties of Partially Stabilized Zirconia Fuel Cell".
Proceedings Electrochemical Society (First International Symposium On Solid Oxide Fueld Cells, vol. 89, No. 11, 1989, Pennington, pp. 214-219, A Belzner et al. "Measurement of the Chemical Diffusion Coefficient of Oxygen In (LaO, 79SrO, 20)MnO3". (Month N/A).
Solid State Ionics, vol. 35, No. 3-4, 1989, Amsterdam NL, pp. 263-268, Kikuji Tsuneyoshi et al. "Kinetic Studies on the Reaction at the LaO, 6CaO, 4MnO3/YSZ Interface, as an SOFC Air Electrode". (Month N/A).
Kawasaki Shinji
Soma Takao
Takahashi Tomonori
Yoshioka Katsuki
NGK Insulators Ltd.
Nuzzolillo M.
Willis Jr. Prince
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