Low-temperature solid-oxide fuel cells utilizing thin bilayer electrolytes
- 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
Similar Records
TEM observation of reaction at the interface between yttria-doped ceria and yttria-stabilized zirconia
Effect of mixed-conducting interfacial layers on solid oxide fuel cell anode performance