Abstract
In planar solid oxide fuel cells (SOFCs), in-plane electrochemical performance can be significantly varied, depending upon operating conditions such as current density and fuel/oxidant utilization, etc. In our previous study, anode-supported SOFCs were tested using four segmented cathodes under co-flow and counter-flow conditions. Even in the case of small size button cell, in-plane performance variation was not negligible under co-flow condition. A larger planar cell is expected to show more significant in-plane performance variation, with higher fuel utilization. In the present study, 5 x 5 cm2 cells were tested with four segmented cathodes to investigate in-plane performance variation as function of fuel utilization. Additionally, Pt reference electrode was embedded in the electrolyte layer of each segment. Utilizing three electrode system for each segment, anode and cathode overpotential can be separated for each segment so that the cause of in-plane performance variation can be more accurately analyzed. Experimental results were discussed with numerical analysis.
Published Version
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