Quantitative evaluation of electrochemically active area in an sofc cathode by oxygen isotopic exchange measurements of a model patterned electrode

Y. Fujimaki, 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

4 Citations (Scopus)

Abstract

The electrochemically active area in an SOFC cathode was quantitatively evaluated from 18O/16O isotope exchange with/without polarization and following isotopic distribution analysis by second ion mass spectroscopy. For this purpose, we proposed a patterned dense thin film electrode modelling a columnar SOFC cathode, and was fabricated it with La0.6Sr0.4CoO3-δ on a Ce0.9Gd0.1O1.95-δ electrolyte. Compared with the results under open circuit condition, the increase in the isotopic ratio of 18O was observed near the electrode/electrolyte interface when a cathodic bias was applied. Such an increase in the 18O isotopic ratio was considered due to the electrochemical oxygen incorporation. The electrochemically active area was evaluated as approximately 25 μm in the La0.6Sr0.4CoO3-δ patterned thin film electrode under cathodic polarization of 220 mV in P(O2) = 1 bar at 973 K.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 14, SOFC 2015
EditorsK. Eguchi, S. C. Singhal
PublisherElectrochemical Society Inc.
Pages623-630
Number of pages8
Edition1
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2015 Jan 1
Event14th 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: 2015 Jul 262015 Jul 31

Publication series

NameECS Transactions
Number1
Volume68
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
CountryUnited Kingdom
CityGlasgow
Period15/7/2615/7/31

ASJC Scopus subject areas

  • Engineering(all)

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