Abstract
In this paper, the effects of ion irradiation at the cathode–electrolyte interface of solid oxide fuel cells (SOFCs) are studied. In particular, the current–voltage performance is studied as a function of irradiation energy for both xenon and sodium ions at a dose of . Impedance spectroscopy is used to determine the type of loss most affected by the irradiation. Results indicate that xenon ion irradiation at a low energy (70 keV and below) produces an increase of more than 100% in the peak power density at by reducing the activation losses of the SOFCs, while sodium irradiation produces little effect. Both xenon and sodium ion irradiation produces a significantly worse performance at a high irradiation energy (150 keV and above). Secondary-ion mass spectrometry was used to verify the depth profile of the implanted ions, which compared favorably with simulations performed using a kinetic Monte Carlo model. Additionally, transmission electron microscopy is used to visualize the damage created in the electrolyte substrates under various irradiation conditions.
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