Abstract
Murata Manufacturing Co., Ltd. has been developing single step co-fired planar type solid oxide fuel cells (SOFCs). A long-term operation had been carried out at 750°C for over 8000 h under galvanostatic condition. The single cell voltage degradation rate was less than 0.20 %/kh after 2000 h operation, and Cr-poisoning in the LSCF cathode after 10000h operation was not observed. However sulfur distribution in the La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) cathode was observed by detailed analysis. To study the S- poisoning mechanism, SO2 poisoning test was carried out at various temperatures, current density and air utilization (Ua). As a result, it revealed that the distribution of sulfur depended on the operating temperature, current density and Ua.
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