Abstract
Solid Oxide Fuel Cells (SOFCs) with a conventional configuration, Ni-YSZ | YSZ | LSM, exhibit a continuous improvement of performance during the operation for initial several tens hours to several weeks until the cathode is completely activated for oxygen reduction. However, the power generation performance is requested to be stable in a short period of time for the practical application. In this study, we investigated the effect of high current loading on the stabilization of cell performance. The time course of terminal voltage was recorded at high current densities, where the cell operated as an oxygen pumping. The terminal voltage abruptly increased at first current loading and then achieved a stable value within several hours. The termination of performance enhancement in fuel cell operation by this current treatment was confirmed. No degradation by loading the current density up to 5.0 A/cm2 for a short time was confirmed in the impedance of both electrodes.
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