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Long-term stability of solid oxide cell air electrodes influenced by gaseous contaminants.

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Title: Long-term stability of solid oxide cell air electrodes influenced by gaseous contaminants.
Authors: Egger, Andreas1 (AUTHOR), Sitte, Werner1 (AUTHOR) werner.sitte@unileoben.ac.at
Source: Solid State Ionics. May2026, Vol. 439, pN.PAG-N.PAG. 1p.
Subjects: Electrodes, Solid oxide fuel cells, Oxygen electrodes, Selective inhibition (Chemistry), Pollutants, Durability
Abstract: Solid oxide cells, i.e. solid oxide fuel cells (SOFCs) and solid oxide electrolyzer cells (SOECs), are efficient energy converters for a future energy system. Poisoning of air electrodes of solid oxide cells by gaseous contaminants is a serious issue limiting the long-term stability of their electrochemical performance, and is thus a challenge for successful commercialization. This review provides an overview of poisoning of perovskite and Ruddlesden-Popper-type air electrodes by gaseous Cr- and Si-species as well as SO 2 , including recent results. It discusses fundamental aspects of Sr-segregation and reactions with gaseous contaminants, emphasizing the importance of size mismatch and basicity of the constituents of the ceramic oxide electrode. Studies on Cr-, Si- and SO 2 -poisoning of air electrodes are presented together with mitigation and recovery measures. • Sr-segregation and reaction with gaseous contaminants. • Poisoning of air electrodes of solid oxide cells by Cr- and Si-containing species as well as SO 2. • Mitigation of air electrode poisoning and recovery measures. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Solid oxide cells, i.e. solid oxide fuel cells (SOFCs) and solid oxide electrolyzer cells (SOECs), are efficient energy converters for a future energy system. Poisoning of air electrodes of solid oxide cells by gaseous contaminants is a serious issue limiting the long-term stability of their electrochemical performance, and is thus a challenge for successful commercialization. This review provides an overview of poisoning of perovskite and Ruddlesden-Popper-type air electrodes by gaseous Cr- and Si-species as well as SO 2 , including recent results. It discusses fundamental aspects of Sr-segregation and reactions with gaseous contaminants, emphasizing the importance of size mismatch and basicity of the constituents of the ceramic oxide electrode. Studies on Cr-, Si- and SO 2 -poisoning of air electrodes are presented together with mitigation and recovery measures. • Sr-segregation and reaction with gaseous contaminants. • Poisoning of air electrodes of solid oxide cells by Cr- and Si-containing species as well as SO 2. • Mitigation of air electrode poisoning and recovery measures. [ABSTRACT FROM AUTHOR]
ISSN:01672738
DOI:10.1016/j.ssi.2026.117177