Electrode performance test on single ceramic fuel cells using as electrolyte Sr- and Mg-doped LaGaO{sub 3}

Journal Article · Wed Oct 01 00:00:00 EDT 1997 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1838058· OSTI ID:562223

Huang, K; Feng, M; Goodenough, J B ^[1]; Milliken, C ^[2]

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1. Univ. of Texas, Austin, TX (United States). Center for Materials Science and Engineering
2. Ceramatec, Inc., Salt Lake City, UT (United States)

The electrode performance of a single oxide fuel cell was evaluated using a 500 {micro}m thick La{sub 0.9}Sr{sub 0.1}Ga{sub 0.8}Mg{sub 0.2}O{sub 2.85} (LSGM) as the electrolyte membrane. Comparison of La{sub 0.6}Sr{sub 0.4}CoO{sub 3{minus}{delta}} (LSCo) and La{sub 0.9}Sr{sub 0.1}MnO{sub 3} (LSM) as cathodes showed LSCo gave an exchange current density two orders of magnitude higher than that of LSM. Comparison of CeO{sub 2}/Ni and LSGM/Ni as anodes showed a degradation of the latter with time, and studies of the anode-electrolyte interface and the reactivity of NiO and LSGM suggest better anode performances can be obtained with a buffer layer that prevents formation of LaNiO{sub 3}. The cell performance showed that, with a proper choice of electrode materials and LSGM as the electrolyte, a SOFC operating at temperatures 600 C < T{sub op} < 800 C is a realistic goal.

• Sponsoring Organization: Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 562223
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 10 Vol. 144; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
BATTERY SEPARATORS
CERIUM OXIDES
COBALT OXIDES
DOPED MATERIALS
ELECTRODES
GALLIUM OXIDES
LANTHANUM OXIDES
MAGNESIUM
MANGANESE OXIDES
NICKEL
PERFORMANCE
SOLID ELECTROLYTE FUEL CELLS
STRONTIUM