Book/Dissertation / PhD Thesis

FZJ-2024-04576

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Investigation and implementation of improved and degradation-tolerant fuel electrodes for solid oxide cells

Schwiers, A.FZJ*

2024
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich
ISBN: 978-3-95806-762-2

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Please use a persistent id in citations: doi:10.34734/FZJ-2024-04576

Abstract: Ni- yttria-stabilized zirconia is commonly used as a fuel electrode cermet in solid oxide cells due to its compelling combination of conductivity, stability, and material compatibility. However, it faces significant degradation when exposed to hydrocarbon-rich fuels, such as tar-containing biogas. Carbon adsorption poisons the Ni component, leading to a decrease in catalytic activity, while the formation of carbon fibers ultimately results in nickel dusting. To address the issue of fuel electrode degradation without the need for fuel pre-treatment, this study investigates two alternative fuel electrode materials. The first material is gadolinia-doped ceria (Gd0.1Ce0.9O2-δ) as a replacement for yttria-stabilized zirconia. Gadolinia-doped ceria possesses mixed electronic and ionic conductivity, allowing it to maintain catalytic activity even when Ni is poisoned. Moreover, it exhibits oxygen storage capacity, potentially aiding in carbon removal. ...

Note: Dissertation, RWTH Aachen University, 2024

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)
2. Werkstoffsynthese und Herstellungsverfahren (IMD-2)

Research Program(s):

1. 1231 - Electrochemistry for Hydrogen (POF4-123) (POF4-123)

Appears in the scientific report 2024

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Database coverage:
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