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Cathode Materials Development for Proton Conducting SOFCs Open Access


Other title
cathode materials
Citrate-nitrate combustion method
spin coating
Type of item
Degree grantor
University of Alberta
Author or creator
Zhou, Guihua
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
Chemical 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 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, 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
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