Properties of partially stabilized zirconia fuel cell

Journal Article · Fri Sep 01 00:00:00 EDT 1989 · Journal of the Electrochemical Society; (USA)

DOI:https://doi.org/10.1149/1.2097505· OSTI ID:7037275

Yoshida, T; Hoshima, T; Mkaizawa, I; Sakurada, S ^[1]

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1. TONEN Corp., Corporate Research and Development Lab., 3-1 Nishi-Tsurugaoka 1-chome, Ohi-Machi, Iruma-Gun, Saitamo-ken (JP)

Much attention has been focused on the solid oxide fuel cell (SOFC). The tubular configuration is being developed by Westinghouse Corporation and pilot plant facilities are operated in the 1 to 5kW range. The other SOFC configurations have now been proposed: monolithic SOFC and planar configuration SOFC. Fully stabilized zirconia (FSZ) was applied to SOFC as electrolytes, since FSZ offers a superior oxygen conductivity. However, yttria doped zirconia has three different modifications: monoclinic, tetragonal, and cubic phases. In FSZ, a high yttria doping retains the normal high-temperature cubic over a wide range of temperature. Partially stabilized zirconia (PSZ), with a lower concentration of yttria dopant, consists mainly of the tetragonal phase and possesses a high strength and a high toughness despite the fact that FSZ is brittle. The mechanical properties of PSZ seem to be derived from the stress-induced tetragonal to monoclinic transition, which may provide an ambiguity on long term stability at high temperature. Advances in ceramics technology allow the fabrication of thin PSZ sheets below the thickness of 0.25 mm. The thin PSZ sheets could provide a new assembly of SOFC through PSZ sheets conductivity is one order lower than that of 1000{degrees}C. Thus, a thin PSZ sheet is a good candidate for a SOFC electrolyte. In this paper, the properties of SOFC using PSZ as an electrolyte are presented.

• OSTI ID: 7037275
• Journal Information: Journal of the Electrochemical Society; (USA), Journal Name: Journal of the Electrochemical Society; (USA) Vol. 136:9; ISSN JESOA; ISSN 0013-4651
• Country of Publication: United States
• Language: English

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ALLOYS
CHALCOGENIDES
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ELECTRIC CONDUCTIVITY
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TRANSITION ELEMENT COMPOUNDS
YTTRIUM ADDITIONS
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ZIRCONIUM OXIDES