Abstract
The wet powder spraying (WPS) technique was used for the deposition of dense and thin (Y2O3)0.08(ZrO2)0.92 (YSZ-8) films on an anode substrate being used for fuel cell applications. Both agglomeration of the powder and the presence of organics in the substrate have a significant effect on the quality and densification of the thin electrolyte layer. High-energy ball milling effectively broke up the agglomerates and enhanced the packing density of the green layer. Pre-calcination of the substrate at ∼1000 °C enhanced the match of sintering shrinkage between the electrolyte layer and the substrate and improved the quality of the YSZ-8 thin film significantly. Crack-free dual-layer assembly with a highly densified YSZ-8 film as thin as 10 μm was successfully fabricated by optimizing the fabrication parameters. The cells with a La0.8Sr0.2MnO3 cathode showed a high open circuit voltage of 1.071 V and a peak power density of 894 mW cm-2 at 850 °C operated with hydrogen fuel.
Original language | English |
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Pages (from-to) | 229-237 |
Number of pages | 9 |
Journal | Journal of Power Sources |
Volume | 184 |
Issue number | 1 |
DOIs | |
State | Published - 15 Sep 2008 |
Keywords
- Solid-oxide fuel cells (SOFCs)
- Thin electrolyte film
- Wet powder spraying (WPS)
- Yttria-stabilized zirconia (YSZ)