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http://dx.doi.org/10.4191/KCERS.2006.43.7.402

Influences of NiO Precursors on Microstructures and Conductivities of Ni/YSZ Anodes in SOFCs  

Jeong, Youn-Ji (Department of Chemistry, Hanyang University)
Lee, Hai-Won (Department of Chemistry, Hanyang University)
Han, Kyoung-R. (Division of Materials Science and Engineering, Korea Institute of Science and Technology)
Kim, Chang-Sam (Division of Materials Science and Engineering, Korea Institute of Science and Technology)
Publication Information
Journal of the Korean Ceramic Society / v.43, no.7, 2006 , pp. 402-407 More about this Journal
Abstract
NiO/YSZ(70 wt%NiO) composite powders were prepared by ball-milling of 8YSZ and NiO precursors, dried and then followed by calcination. The approach was to combine acidic $Ni(NO_3)_2{\cdot}6H_2O$ and basic $2NiCO_3{\cdot}3Ni(OH)_2{\cdot}4H_2O$ via acid-base reaction as a mixed NiO precursor. Their effects were studied in the aspects of DSC, microstructure, porosity, and electrical conductivity. Ni/YSZ composite of 1N9C (1 mole NiO from the nitrate and 9 moles of NiO from the carbonate) was prepared by consolidation at $1400^{\circ}C$ for 3 h, and then followed by reduction at $1000^{\circ}C$ for 3 h under flowing of 6% $H_2/N_2$. It showed a homogeneous microstructure with ${\sim}20%$ porosity and 1880 S/cm at $1000^{\circ}C$.
Keywords
SOFC; Ni/YSZ cermet; NiO precursors; Acid-base reaction; Electrical conductivity;
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Times Cited By KSCI : 1  (Citation Analysis)
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