Chemical degradation of SOFCs: External impurity poisoning and internal diffusion-related phenomena

K. Sasaki, T. Yoshizumi, K. Haga, H. Yoshitomi, T. Hosoi, Y. Shiratori, S. Taniguchi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Durability of SOFCs is one of the most important requirements for commercialization. In this paper, we analyze chemical degradation phenomena caused by both extrinsic and intrinsic origins besides by thermal/redox cycling. As external degradation, impurity (sulfur, phosphorus etc.) poisoning has been systematically analyzed and classified based on both thermochemical and kinetic consideration. We present typical intrinsic chemical degradation phenomena observed, mainly diffusion-related processes (interdiffusion, grain boundary diffusion, dopant dissolution, phase transformation etc.) around interfaces between the electrolyte and the electrode, which has been revealed through high-resolution STEM-EDX analysis of cells after long-term operation. Degradation mechanisms have been classified.

Original languageEnglish
Pages (from-to)315-323
Number of pages9
JournalECS Transactions
Volume57
Issue number1
DOIs
Publication statusPublished - 2013

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poisoning
Solid oxide fuel cells (SOFC)
Impurities
Degradation
degradation
commercialization
grain boundary
durability
electrolyte
electrode
dissolution
sulfur
Interdiffusion (solids)
phosphorus
kinetics
Phosphorus
Energy dispersive spectroscopy
Dissolution
Grain boundaries
Durability

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Chemical degradation of SOFCs : External impurity poisoning and internal diffusion-related phenomena. / Sasaki, K.; Yoshizumi, T.; Haga, K.; Yoshitomi, H.; Hosoi, T.; Shiratori, Y.; Taniguchi, S.

In: ECS Transactions, Vol. 57, No. 1, 2013, p. 315-323.

Research output: Contribution to journalArticle

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