- Cathode Materials Development for Proton Conducting SOFCs
- Zhou, Guihua
Citrate-nitrate combustion method
- Jan 5, 2012 12:20 PM
- Adobe PDF
- 2877249 bytes
- Thin film electrolyte and new cathode catalysts were developed to improve the performance of proton conducting solid oxide fuel cells (SOFCs). Electrolyte BaCe0.7Zr0.1Y0.2O3-δ; (BCZY) and cathode materials La0.6Sr0.4Co0.2Fe0.8O3-δ; (LSCF) and Sr0.7Ce0.3MnO3-δ; (SCM) were synthesized using the citrate-nitrate combustion method, and characterized using XRD. Thin film electrolyte was successfully prepared using a spin coating technique. Two cathode catalysts were developed: a composite cathode comprising Ag-modified LSCF+BCZY, and SCM. Chemical compatibility between LSCF and BCZY and chemical stability of LSCF in CO2-containing atmosphere were demonstrated. The electrochemical performance of the composite cathode was dependent on Ag content in the composite cathode, peaking at a power density of 563 mW.cm-2 at 700 °C for Ni+BCZY|BCZY|10 wt% Ag-(LSCF+BCZY) thin film button cell. The performance of SCM was dependent on the cathode firing temperature. The highest peak power density, 378 mW.cm-2, was obtained at 700 °C for Ni+BCZY|BCZY|SCM single cell with SCM fired at 1100 °C.
- Master of Science
- Department of Chemical and Materials Engineering
- Chemical Engineering
- Spring 2012
- Luo, Jingli (Department of Chemical and Materials Engineering)
Etsell, Thomas (Department of Chemical and Material Engineering)
Gallart, Marc Secanell (Department of Mechnical Engineering)
Theses and Dissertations Spring 2009 to present
Department of Chemical and Materials Engineering
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