Contribution of triple-phase boundary reaction in cathodic reaction of solid oxide fuel cell

Y. Fujimaki, K. Mizuno, Y. Kimura, T. Nakamura, K. Develos-Bagarinao, K. Yamaji, K. Yashiro, T. Kawada, F. Iguchi, H. Yugami, K. Amezawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The cathodic reaction of a solid oxide fuel cell (SOFC) was investigated by 18O/16O isotope exchange with/without polarization and isotopic distribution analysis by second ion mass spectroscopy. In order to elucidate the contribution of triple phase boundary (TPB) reaction while eliminating the influence of the electrode microstructure, a patterned thin film electrode was used as a model cathode. La0.6Sr0.4CoO3-δ was chosen as a model material exhibiting mixed ionic and electronic conduction. A slight increase in the 18O ratio was observed within 20 μm from the electrode/electrolyte interface under a constant cathodic polarization of 220 mV at 973 K in 1 bar of P(O2). Such an increase in the 18O ratio was considered to be caused by the electrochemical oxygen incorporation. The contribution of the TPB reaction to the total cathode reaction was not clearly observed at least in applied experimental conditions.

Original languageEnglish
Title of host publicationECS Transactions
EditorsT. Kawada, S. C. Singhal
PublisherElectrochemical Society Inc.
Pages847-853
Number of pages7
Edition1
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2017 May 30
Event15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 - Hollywood, United States
Duration: 2017 Jul 232017 Jul 28

Publication series

NameECS Transactions
Number1
Volume78
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017
CountryUnited States
CityHollywood
Period17/7/2317/7/28

ASJC Scopus subject areas

  • Engineering(all)

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