Abstract

In this work, porous ceramic supported tubular cell with inner coating was studied. The hollow fiber support tube was fabricated through phase-inversion method using 3%mol Y2O3 doped ZrO2 (TZP). Then the NiO-8%mol Y2O3 stabilized ZrO2 (YSZ) anode layer, YSZ electrolyte layer, (La0.8Sr0.2)0.95MnO3-δ(LSM)-YSZ cathode layer and LSM current collected layer were applied by screen printing and high-temperature sintering in proper orders. Finally, La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ-Gd0.1Ce0.9O1.95 composite layer was coated on the inner side of the support tube. Cell performance characterization was conducted using room-temperature humidified hydrogen and methane at a gas flow rate of 40 mL min-1 inside the tube and ambient air at cathode side. Results show that, the maximum power density was 96 and 106 mW cm-2 at 850 oC under H2 and CH4, respectively. No obvious degradations were observed in the stability test under humidified H2 for 50 h and CH4 for 250 h.

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