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Cathode Materials Development for Proton Conducting SOFCs Open Access
- Other title
Citrate-nitrate combustion method
- Type of item
- Degree grantor
University of Alberta
- Author or creator
- Supervisor and department
Luo, Jingli (Department of Chemical and Materials Engineering)
- Examining committee member and department
Gallart, Marc Secanell (Department of Mechnical Engineering)
Etsell, Thomas (Department of Chemical and Material Engineering)
Department of Chemical and Materials Engineering
- Date accepted
- Graduation date
Master of Science
- Degree level
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.
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File title: Chapter 1 Introduction