Fabrication of a symmetrical microtubular SOFC single cell with catalyst- impregnated YSZ scaffold using an electrophoretic deposition process
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Symmetrical microtubular solid oxide fuel cells (SOFCs) with a catalyst-impregnated yttria-stabilized zirconia (YSZ) scaffoldwere fabricated via electrophoretic deposition (EPD). While the pH of the prepared slurry decreased with the amount ofphosphate ester (PE) as a charging agent, the electrical conductivity increased. Both the YSZ scaffold and electrolyte slurrieswith 0.5 wt% PE were stable over 36 h. The deposit thickness of the YSZ electrolyte layer increased with the applied voltageand deposition time. Due to the symmetrical scaffold structure, a single cell could be obtained by a one-step co-firing process. Fine Ni and La0.6Sr0.4CoO3-δ (LSC) catalysts for anodes and cathodes, respectively, can be impregnated and distributeduniformly into the porous YSZ scaffold by a glycine-mediated impregnation technique. The maximum power density was 59,67, and 71 mW/cm2 at 600, 700, and 800 oC, respectively. After the 50th redox cycle, the single cell exhibited no significantperformance degradation.
Abstract
Symmetrical microtubular solid oxide fuel cells (SOFCs) with a catalyst-impregnated yttria-stabilized zirconia (YSZ) scaffoldwere fabricated via electrophoretic deposition (EPD). While the pH of the prepared slurry decreased with the amount ofphosphate ester (PE) as a charging agent, the electrical conductivity increased. Both the YSZ scaffold and electrolyte slurrieswith 0.5 wt% PE were stable over 36 h. The deposit thickness of the YSZ electrolyte layer increased with the applied voltageand deposition time. Due to the symmetrical scaffold structure, a single cell could be obtained by a one-step co-firing process. Fine Ni and La0.6Sr0.4CoO3-δ (LSC) catalysts for anodes and cathodes, respectively, can be impregnated and distributeduniformly into the porous YSZ scaffold by a glycine-mediated impregnation technique. The maximum power density was 59,67, and 71 mW/cm2 at 600, 700, and 800 oC, respectively. After the 50th redox cycle, the single cell exhibited no significantperformance degradation.
참고문헌 (24)
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