Abstract
We have developed high-performance oxygen electrodes for reversible solid oxide cells. La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) - (CeO2)0.8(SmO1.5)0.2 (SDC) composite scaffolds were infiltrated with SDC nanoparticles. The electrode with 30 vol% load of SDC nanoparticles exhibited very low overpotentials, η ≤ 0.010 V for anodic and |η| ≤ 0.030 V for cathodic reactions at 0.7 A cm−2 and 800 °C, which was ascribed to a noticeable increase in the exchange current densities. The electrodes have shown very stable performance under anodic oxygen evolution operation at −0.5 A cm−2 and 750 °C for 400 h. Such electrodes developed are extremely promising oxygen electrodes for R-SOC ever reported.
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