Processing and characterization of ultra-thin yttria-stabilized zirconia (YSZ) electrolytic films for SOFC
Sub-micron yttria-stabilized zirconia (YSZ) electrolyte layer was prepared by a liquid state deposition method and with an average thickness of 0.5 μm to improve the performance of the anode-supported solid oxide fuel cell (SOFC). The YSZ precursors, containing yttrium and zirconium species and an a...
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Veröffentlicht in: | Solid state ionics 2006-01, Vol.177 (3), p.351-357 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Sub-micron yttria-stabilized zirconia (YSZ) electrolyte layer was prepared by a liquid state deposition method and with an average thickness of 0.5 μm to improve the performance of the anode-supported solid oxide fuel cell (SOFC). The YSZ precursors, containing yttrium and zirconium species and an additive, poly-vinyl-pyrrolidone (PVP), were spin-coated on a Ni/YSZ anode substrate. Several properties, including crystalline phases, microstructures, and current–voltage (
I–
V) characteristics, were investigated. The thin film of 4 mol% Y
2O
3-doped ZrO
2 (4YSZ) consisted of cubic, tetragonal, and a trace of monoclinic phases, and showed a crack-free layer after sintering at 1300 °C. The anode supported SOFC, which consists of the Ni–YSZ anode, 4YSZ electrolyte, and Pt/Pd cathode, showed power densities of 477 mW/cm
2 at 600 °C, and 684 mW/cm
2 at 800 °C. Otherwise, the surface cracks of the other YSZ-coated samples (e.g. 8YSZ) can be repaired by a multi-coating method. |
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ISSN: | 0167-2738 1872-7689 |
DOI: | 10.1016/j.ssi.2005.10.010 |