Effect of starting powder on screen-printed YSZ films used as electrolyte in SOFCs

Screen-printing technology was developed to fabricate dense YSZ electrolyte films onto NiO–YSZ porous anode substrates. A single fuel cell of Ni-YSZ/YSZ (31 μm)/LSM-YSZ was successfully prepared by screen-printing technology. Using humidified hydrogen as fuel and ambient air as oxidant, the fuel cel...

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Bibliographic Details
Published in:Solid state ionics 2006-01, Vol.177 (3), p.281-287
Main Authors: Zhang, Yaohui, Huang, Xiqiang, Lu, Zhe, Ge, Xiaodong, Xu, Jiahuan, Xin, Xianshuang, Sha, Xueqing, Su, Wenhui
Format: Article
Language:English
Subjects:
Ball milling
Dense YSZ films
Screen-printing
SOFCs
Starting powder
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Summary:Screen-printing technology was developed to fabricate dense YSZ electrolyte films onto NiO–YSZ porous anode substrates. A single fuel cell of Ni-YSZ/YSZ (31 μm)/LSM-YSZ was successfully prepared by screen-printing technology. Using humidified hydrogen as fuel and ambient air as oxidant, the fuel cell provided the maximum power densities of 0.18, 0.33, 0.58, 0.97 and 1.3 W/cm 2 at 650, 700, 750, 800 and 850 °C, respectively. The properties of the starting YSZ powder exerted a significant effect on the characteristics of the screen-printed YSZ electrolyte films. The aggregates of the powder could be partially broken by ball milling. The YSZ powder with a small particle size and a narrow particle size distribution helped to obtain dense YSZ films. The films prepared from the YSZ powder with high aggregates were very porous, which resulted in a low open circuit voltage, a high ohmic resistance, a high polarization resistance and thus a poor cell performance.
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2005.11.008