Granular nanocrystalline zirconia electrolyte layers deposited on porous SOFC cathode substrates
✍ Scribed by Johannes Seydel; Michael Becker; Ellen Ivers-Tiffée; Horst Hahn
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 724 KB
- Volume
- 164
- Category
- Article
- ISSN
- 0921-5107
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✦ Synopsis
Thin granular yttria-stabilized zirconia (YSZ) electrolyte layers were prepared by chemical vapor synthesis and deposition (CVD/CVS) on a porous substoichiometric lanthanum-strontium-manganite (ULSM) solid oxide fuel cell cathode substrate. The substrate porosity was optimized with a screen printed fine porous buffer layer. Structural analysis by scanning electron microscopy showed a homogeneous, granular nanocrystalline layer with a microstructure that was controlled via reactor settings. The CVD/CVS gas-phase process enabled the deposition of crack-free granular YSZ films on porous ULSM substrates. The electrolyte layers characterized with impedance spectroscopy exhibited enhanced grain boundary conductivity.