Effects of Ce0.6Mn0.3Fe0.1O2-δ (CMF) anodic interlayer on power generation properties of microtubular SOFC using doped La0.9Sr0.1Ga0.8Mg0.2O3 (LSGM) electrolyte were investigated. Two types of microtubular cells, which were used NiOCe0.8Gd0.2O2-δ (GDC) cerment for anode porous substrate, were prepared with (A-cell) or without (B-cell) CMF interlayer by dip-coating method. The power generation properties of A- and B-cell sintered at 1623 K were measured. It was revealed that A-cell showed about 40% higher power density (1 W/cm2 at 973 K) than that of B-cell at temperature from 873 to 973 K because of the decreased electrode polarization by introducing CMF anodic interlayer. It was found that the diffusion of Ni into LSGM/Ti-LDC (Ce0.6La0.4O2-δ added with 0.5 wt% TiO2) interlayer was much suppressed by CMF interlayer (A-cell). This is because Ni was trapped in the CMF interlayer and formed Ni-CMF composite layer. Decrease in the polarization resistance might be assigned to the formation of Ni-CMF composite layer. Thus, CMF is promising for increasing the power generation property of microtubular SOFC using LSGM electrolyte prepared by dip coating method.
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