| NiO 전구체가 고체산화물 연료전지 Ni/YSZ 음극의 미세구조와 전기전도도에 미치는 영향 |
| 정윤지, 이해원, 임경란1, 김창삼1 |
한양대학교 화학과
1한국과학기술연구원 재료연구부 |
| Influences of NiO Precursors on Microstructures and Conductivities of Ni/YSZ Anodes in SOFCs |
| Youn-Ji Jeong, Hai-Won Lee, Kyoung-R. Han1, Chang-Sam Kim1 |
Department of Chemistry, Hanyang University
1Division of Materials Science and Engineering, Korea Institute of Science and Technology |
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| ABSTRACT |
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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 $1000^{circ}C$. |
| Key words:
SOFC, Ni/YSZ cermet, NiO precursors, Acid-base reaction, Electrical conductivity |
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