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J. Korean Ceram. Soc. > Volume 45(12); 2008 > Article
Journal of the Korean Ceramic Society 2008;45(12): 782.
doi: https://doi.org/10.4191/kcers.2008.45.1.782
Nanocomposite Ni-CGO Synthesized by the Citric Method as a Substrate for Thin-film IT-SOFC
Zhenwei Wang, Yu Liu1, Shin-ichi Hashimoto2, Masashi Mori
Central Research Institute of Electric Power Industry
1Shanghai Institute of Ceramics, Chinese Academy of Sciences
2Tohoku University
ABSTRACT
Ni-ceria cermets have been extensively investigated as candidates for the anode in intermediate-temperature solid oxide fuel cells. We have used the citric method to synthesize nanocomposite powders consisting of NiO (Ni metal content: $40{sim}60%$ by volume) highly dispersed in $Ce_{0.9}Gd_{0.1}O_{1.95}$ (CGO). The microstructure characteristics and sintering behaviors of the nanocomposites were investigated. No impurity phases were observed and the shrinkage of these substrates matched well with that of a CGO electrolyte with a specific surface area of $11;m^2/g$. Densification of the CGO electrolyte layer to $<5;{mu}m$ thickness was achieved by co-firing the laminated electrolyte with the porous NiO-CGO substrate at $1400^{circ}C$ for 6 h.
Key words: SOFC, Anode, NiO, Ceria, Citric method, Sintering characteristics
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