Abstract
In this work, perovskite-type oxide La0.6Ca0.4Fe0.7Sc0.1Ni0.2O3-δ (LCFSN) was synthesized by the conventional wet chemical method and firstly characterized as the electrode for symmetrical solid oxide electrochemical cells (SSOCs). The microstructure and electrochemical performance of SSOCs based on this electrode was investigated. The maximum power density of the cell reaches 0.234 W/cm2 at 800°C and has good stability in short-term test in fuel cell mode. In electrolysis cell mode, it displays an electrolysis current density as high as 0.757 A/cm2 for CO2 electrolysis when the temperature and applied voltage are 800°C and 1.8 V, respectively. The cell also exhibits excellent durability in electrolysis cell mode. The results suggest that the SSOCs based on this symmetrical electrode has a very promising prospect.
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