Oxidation-induced degradation of SOFC Ni anodes at high fuel utilizations

T. Kawasaki; J. Sugimoto; Y. Tachikawa; Y. Shiratori; S. Taniguchi; K. Sasaki

doi:10.1149/06801.1345ecst

Oxidation-induced degradation of SOFC Ni anodes at high fuel utilizations

T. Kawasaki, J. Sugimoto, Y. Tachikawa, Y. Shiratori, S. Taniguchi, K. Sasaki

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

10 Citations (Scopus)

Abstract

In the downstream of SOFC systems, higher oxygen partial pressure can cause oxidation-induced Ni anode degradation. In this study, we have investigated cell performance at high fuel utilizations for simulating situations around the system downstream. When the anode voltage was higher than a voltage threshold, the cell performance was stable. On the other hand, it became unstable associated with cell voltage oscillation when anode voltage was around or less than the threshold value. The threshold value was consistent with the anode potential derived from the oxygen partial pressure at the phase boundary at which both Ni and NiO coexist.

Original language	English
Title of host publication	Solid Oxide Fuel Cells 14, SOFC 2015
Editors	S. C. Singhal, K. Eguchi
Publisher	Electrochemical Society Inc.
Pages	1345-1352
Number of pages	8
Edition	1
ISBN (Electronic)	9781623322717
DOIs	https://doi.org/10.1149/06801.1345ecst
Publication status	Published - 2015
Event	14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage - Glasgow, United Kingdom Duration: Jul 26 2015 → Jul 31 2015

Publication series

Name	ECS Transactions
Number	1
Volume	68
ISSN (Print)	1938-6737
ISSN (Electronic)	1938-5862

Other

Other	14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
Country/Territory	United Kingdom
City	Glasgow
Period	7/26/15 → 7/31/15

All Science Journal Classification (ASJC) codes

Engineering(all)

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10.1149/06801.1345ecst

Cite this

Kawasaki, T., Sugimoto, J., Tachikawa, Y., Shiratori, Y., Taniguchi, S., & Sasaki, K. (2015). Oxidation-induced degradation of SOFC Ni anodes at high fuel utilizations. In S. C. Singhal, & K. Eguchi (Eds.), Solid Oxide Fuel Cells 14, SOFC 2015 (1 ed., pp. 1345-1352). (ECS Transactions; Vol. 68, No. 1). Electrochemical Society Inc.. https://doi.org/10.1149/06801.1345ecst

Oxidation-induced degradation of SOFC Ni anodes at high fuel utilizations. / Kawasaki, T.; Sugimoto, J.; Tachikawa, Y. et al.

Solid Oxide Fuel Cells 14, SOFC 2015. ed. / S. C. Singhal; K. Eguchi. 1. ed. Electrochemical Society Inc., 2015. p. 1345-1352 (ECS Transactions; Vol. 68, No. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kawasaki, T, Sugimoto, J, Tachikawa, Y, Shiratori, Y, Taniguchi, S & Sasaki, K 2015, Oxidation-induced degradation of SOFC Ni anodes at high fuel utilizations. in SC Singhal & K Eguchi (eds), Solid Oxide Fuel Cells 14, SOFC 2015. 1 edn, ECS Transactions, no. 1, vol. 68, Electrochemical Society Inc., pp. 1345-1352, 14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage, Glasgow, United Kingdom, 7/26/15. https://doi.org/10.1149/06801.1345ecst

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abstract = "In the downstream of SOFC systems, higher oxygen partial pressure can cause oxidation-induced Ni anode degradation. In this study, we have investigated cell performance at high fuel utilizations for simulating situations around the system downstream. When the anode voltage was higher than a voltage threshold, the cell performance was stable. On the other hand, it became unstable associated with cell voltage oscillation when anode voltage was around or less than the threshold value. The threshold value was consistent with the anode potential derived from the oxygen partial pressure at the phase boundary at which both Ni and NiO coexist.",

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AB - In the downstream of SOFC systems, higher oxygen partial pressure can cause oxidation-induced Ni anode degradation. In this study, we have investigated cell performance at high fuel utilizations for simulating situations around the system downstream. When the anode voltage was higher than a voltage threshold, the cell performance was stable. On the other hand, it became unstable associated with cell voltage oscillation when anode voltage was around or less than the threshold value. The threshold value was consistent with the anode potential derived from the oxygen partial pressure at the phase boundary at which both Ni and NiO coexist.

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Oxidation-induced degradation of SOFC Ni anodes at high fuel utilizations

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