Low-temperature solid-oxide fuel cells utilizing thin bilayer electrolytes

Journal Article · Thu May 01 04:00:00 EDT 1997 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1837635· OSTI ID:511934

Tsai, T; Perry, E; Barnett, S ^[1]

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1. Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering

Solid-oxide fuel cells (SOFCs) with electrolytes that provide high open-circuit voltage (OCV) and low ohmic loss down to 550 C are described. The electrolytes were bilayers consisting of a 4 to 8 {micro}m thick Y-doped ceria (YDC) layer with a 1 to 1.5 {micro}m thick Y-doped zirconia (YSZ) layer on the fuel side. The cathode/supports were La{sub 0.85}Sr{sub 0.15}MnO{sub 3}-YSZ. The anodes consisted of thin YDC and Ni-YSZ layers. The YDC/YSZ electrolyte SOFCs yielded 85 to 98% of the theoretical OCV, compared with {approx}50% for YDC electrolyte SOFCs. The cathode overpotential, which was a main factor limiting SOFC power density, was lower for YDC/YSZ than YSZ electrolytes. The maximum power density at 600 C, 210 mW/cm{sup 2}, is higher than previously reported SOFCs.

• Sponsoring Organization: Electric Power Research Inst., Palo Alto, CA (United States); Gas Research Inst., Chicago, IL (United States)
• OSTI ID: 511934
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 5 Vol. 144; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
36 MATERIALS SCIENCE
CATHODES
CERIUM OXIDES
DESIGN
ELECTRICAL PROPERTIES
LANTHANUM OXIDES
MANGANESE OXIDES
POWER DENSITY
SOLID ELECTROLYTE FUEL CELLS
SOLID ELECTROLYTES
STRONTIUM OXIDES
YTTRIUM OXIDES
ZIRCONIUM OXIDES