Cermet anode of NiFe(9:1)-La0.9Sr0.1Ga 0.8Mg0.2O3 (LSGM) was studied for direct CH4 fueled SOFC operating at intermediate temperature. In case of NiFe bimetal anode, power density of the cell decreased drastically in CH 4. On the other hand, mixing Sm doped CeO2, MgO, or LSGM is effective for improving the long-term stability. The cell with NiFe-LSGM anode exhibited much stable power density under CH4 feeding condition. At 1073K, the maximum power density of the cell using NiFe-LSGM anode is achieved a value of 0.48 W/cm2, and after 15 hours operation, degradation in the power density is slightly observed. However, stability in the power density is much improved. Deposition of coke is also hardly detected by Raman spectroscopy, and so it was found that NiFe-LSGM10 shows a high tolerance against the coke deposition.
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