Abstract
Agglomeration of the metal electrode decreases the performance of low‐temperature solid oxide fuel cells (LT‐SOFC) during operation at elevated temperatures. Here, we report a Pt electrode/ridge‐valley nanostructured samaria‐doped ceria (SDC) layer interface with extended lifetime. LT‐SOFCs with RF‐sputtered SDC interlayers with thicknesses in the range 65–260 nm show a >20 times lower degradation of performance as compared to cells without interlayer when operated at 450 °C (1.8% h−1 vs. 45% h−1). Micromorphological analysis reveals that the coarsening of the Pt electrode is significantly suppressed by the presence of the nanostructured SDC interlayer, possibly due to a stronger bonding between this layer and the Pt grains.
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