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Enhancing the Mechanical Strength of Electrolyte-Supported Solid Oxide Cells with Thin and Dense Doped-Ceria Interlayers

Title data

Riegraf, Matthias ; Bombarda, Ilaria ; Dömling, Ferdinand ; Liensdorf, Tom ; Sitzmann, Carolin ; Langhof, Nico ; Schafföner, Stefan ; Han, Feng ; Sata, Noriko ; Geipel, Christian ; Walter, Christian ; Costa, Rémi:
Enhancing the Mechanical Strength of Electrolyte-Supported Solid Oxide Cells with Thin and Dense Doped-Ceria Interlayers.
In: ACS Applied Materials & Interfaces. Vol. 13 (2021) Issue 42 . - pp. 49879-49889.
ISSN 1944-8252
DOI: https://doi.org/10.1021/acsami.1c13899

Project information

Project title:
Project's official titleProject's id
Kostenoptimierter Stack und verbessertes Offgrid-System (KOSOS)03ETB005

Project financing: Bundesministerium für Wirtschaft und Energie

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Ceramic Materials > Chair Ceramic Materials - Univ.-Prof. Dr.-Ing. Stefan Schafföner
Faculties
Faculties > Faculty of Engineering Science > Chair Ceramic Materials
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences
600 Technology, medicine, applied sciences > 600 Technology
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 03 Dec 2021 08:37
Last Modified: 20 Jan 2022 14:20
URI: https://eref.uni-bayreuth.de/id/eprint/67994