Processing of Ce0.8Gd0.2O2-δ barrier layers for solid oxide cells: The effect of preparation method and thickness on the interdiffusion and electrochemical performance
| Autor: | Jakub Karczewski, Sebastian Molin, Sea-Fue Wang, Bartosz Kamecki, Piotr Jasiński, Aleksander Mroziński |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Electrolysis Materials science Oxide 02 engineering and technology 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Chemical reaction law.invention Barrier layer chemistry.chemical_compound Chemical engineering chemistry law 0103 physical sciences Materials Chemistry Ceramics and Composites 0210 nano-technology Clark electrode Ohmic contact Electrical conductor |
| Zdroj: | Journal of the European Ceramic Society. 40:5626-5633 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2020.06.006 |
| Popis: | Ce0.8Gd0.2O1.9 (CGO) barrier layers are required to mitigate the chemical reactions between Sr-containing oxygen electrode materials and Zr-based oxygen ion conductors in high-temperature solid oxide cells. Barrier layers produced by different methods were studied in this work. As a reference, a cell with no barrier layer was measured. The application of the powder-processed barrier layers, considerably increases the performance. For further comparison, thin and dense CGO layers were produced by a low-temperature spray pyrolysis process. Three different thicknesses were evaluated: ∼300 nm, ∼700 nm and ∼1500 nm. The best performance was found for the ∼700 nm thick CGO barrier layer. It showed low ohmic and polarisation resistances. The low thickness and high density of the CGO barrier layer were found to be the important factors. The cells with the ∼700 nm CGO barrier layers were also evaluated for their electrolysis performance as well as fuel cell durability. |
| Databáze: | OpenAIRE |
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