Enhancing the Mechanical Strength of Electrolyte-Supported Solid Oxide Cells with Thin and Dense Doped-Ceria Interlayers
| Autor: | Christian Geipel, Carolin Sitzmann, Tom Liensdorf, Christian Walter, Nico Langhof, Matthias Riegraf, Ilaria Bombarda, Rémi Costa, Feng Han, Stefan Schafföner, Ferdinand Dömling, Noriko Sata |
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| Rok vydání: | 2021 |
| Předmět: |
Electrolysis
solid oxide fuel cell (SOFC) Materials science Yield (engineering) Oxide residual stress Electrolyte law.invention chemistry.chemical_compound Brittleness chemistry law Residual stress physical vapor deposition (PVD) visual_art visual_art.visual_art_medium General Materials Science Ceramic Composite material Gd-doped ceria (CGO) thin electrolytes Power density |
| Zdroj: | ACS Applied Materials & Interfaces. 13:49879-49889 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | The penetration of fuel cells and electrolyzers in energy systems calls for their scale-up to the gigawatt (GW) level. High temperature solid oxide cells (SOC) offer unrivaled efficiencies in both electrolysis and fuel cell operation. However, they are made of ceramics and are brittle by nature. Consequently, a high mechanical strength to avoid failure during stacking is essential to achieve a high manufacturing yield. Here, we show that without changing the materials of the state-of-the-art cells, thin and dense ceria interlayers enable comparable power densities and durability in fuel cell operation. The sole tuning of the morphology and processing of the interlayers reduce the residual stress in the cell significantly which increases its mechanical strength by up to 78%. These results promise performance gains of similar magnitude by enabling a substantial decrease of the electrolyte thickness while maintaining robustness. This stress engineering approach presents a way to increase the volumetric power density and material efficiency of SOC systems. |
| Databáze: | OpenAIRE |
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