Fabrication of NiO/YSZ anode material for SOFC via mixed NiO precursors
| Autor: | Younji Jeong, Kyoung Ran Han, Haiwon Lee, Chang-Sam Kim |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
Mechanical Engineering Nickel oxide Metallurgy Non-blocking I/O chemistry.chemical_element Cermet Condensed Matter Physics law.invention Anode Nickel Chemical engineering chemistry Mechanics of Materials law Mixed oxide General Materials Science Calcination Yttria-stabilized zirconia |
| Zdroj: | Materials Letters. 61:1242-1245 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2006.07.005 |
| Popis: | NiO/YSZ anode material with 45 wt.% NiO for SOFC was synthesized by surface-modification of YSZ powder with mixed nickel oxide precursors. YSZ was treated with acidic nickel nitrate and then followed by basic nickel carbonate. Such prepared NiO/YSZ precursor showed nano-size homogeneous mixture upon calcination at 800 °C. The mixture was ground and subjected to calcination at 1200 °C to give rise to agglomerate-free NiO/YSZ composite powder with particle size of ∼ 0.4–0.7 μm. The composite powder was analyzed by XRD, zetapotential measurements, and SEM. The composite powder produced the Ni/YSZ cermet of homogeneous microstructure with a rigid YSZ skeleton, porosity of 33%, and an electrical conductivity of ∼ 430 S/cm at 800–1000 °C, which is much higher than that (∼ 180 S/cm) prepared by a conventional mixed oxide process. |
| Databáze: | OpenAIRE |
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