Abstract
Surface modification of electrodes for realizing high electrochemical reactivity and thermal stability is an attractive strategy for high-performance low temperature solid oxide fuel cells (LT-SOFCs). Herein, the atomic-layer-deposited (ALD) CeO2-coated Pt anode structure is fabricated and applied to anodized aluminum oxide (AAO)-based thin-film LT-SOFC. The effect of Pt anode morphology on the infiltration of ALD CeO2 is elucidated. Anode kinetics are improved in the ALD CeO2-coated porous Pt anode cell possibly due to the larger Pt–CeO2 interface density, leading to a decrease in activation resistance by 86%. The maximum power density of the cell with the ALD CeO2-coated porous Pt anode shows 478 mW/cm2; a dramatic improvement by a factor of two compared to the bare porous Pt anode.
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