Sulfur poisoning effect on the electrochemical performance and long-term durability of SOFC cathode has been investigated for La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) by Galvanic Current Interruption (GCI) technology. Cell performance was measured supplying with SO2-containing air to the cathode under a constant current density of 200 mA cm-2. At 800 °C, LSCF cathode showed low tolerance to the sulfur poisoning. SO2 tends to react with strontium in LSCF material resulting in the formation of SrSO4 in the cathode. This reaction gave rise to microstructural change in the cathode and caused gradual degradation of cell performance.

Sulfur poisoning at 800°C significantly reduces the performance and durability of LSCF cathodes in SOFCs due to microstructural changes and sulfur formation.

Effect of SO2 on the Performance of LSCF Cathode

Key Takeaway: Sulfur poisoning at 800°C significantly reduces the performance and durability of LSCF cathodes in SOFCs due to microstructural changes and sulfur formation.