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Journal of the Electrochemical Society, Vol.162, No.12, F1379-F1383, 2015
Effects of Ce0.6Mn0.3Fe0.1O2-delta Inter layer on Electrochemical Properties of Microtubular SOFC Using Doped LaGaO3 Electrolyte
Effects of Ce0.6Mn0.3Fe0.1O2-delta (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 NiO-Ce0.8Gd0.2O2-delta, (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/cm(2) 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-delta 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. (C) 2015 The Electrochemical Society. All rights reserved.