Towards understanding of oxygen electrode processes during solid oxide electrolysis operation to improve simultaneous fuel and oxygen generation

Vanja Subotić, Shotaro Futamura, George F. Harrington, Junko Matsuda, Katsuya Natsukoshi, Kazunari Sasaki

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

Solid oxide electrolysis cells (SOEC) present a very promising technology to utilize excessive renewables among other available technologies. In comparison to other electrolyzers, SOECs enable simultaneous generation of valuable fuels, e.g. hydrogen and syngas, and pure oxygen. Pure oxygen can be used to increase efficiency of industrial combustion processes or for medical purposes. Nevertheless, increasing oxygen partial pressure on the oxygen electrode seems to be critical point for numerous conventional materials used. In this study, we showed that increasing oxygen partial pressure has a positive effect on the oxygen electrode durability. Supply with pure oxygen significantly reduced performance degradation, thus presenting the cells developed as very promising candidates for pure oxygen generation. Moreover, the cells were tested under operating conditions designed to accelerate degradation. This resulted in LSCF decomposition and formation of Sr-layer. Undesired morphology changes of the oxygen electrode were successfully identified with online-monitoring tools, thus providing a great contribution in preventing irreversible electrode degradation by suggesting more appropriate operating conditions.

本文言語英語
論文番号229600
ジャーナルJournal of Power Sources
492
DOI
出版ステータス出版済み - 4 30 2021

All Science Journal Classification (ASJC) codes

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 物理化学および理論化学
  • 電子工学および電気工学

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