Evaluation method of current distribution in SOFC in operation

T. Tsuchikura, T. Sakamoto, T. Zukawa, H. Sumi, K. Sato, K. Yashiro, T. Hashida, T. Kawada

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

Abstract

A method was developed to estimate local current in an SOFC. Lateral potential profile on a current collector plane was measured using multiple probes, and the local current was estimated as the second derivative of the potential. This concept was successfully demonstrated by experiments measuring 1-dimensional current distribution on a small tubular cell. The condition for the measurement was optimized according to the ratio of resistance on the interconnect to that through the cell. The same concept was applied to a planar single cell flowing current diagonally on the top and bottom plates. Numerical estimation revealed that the 2-dimensional current distribution can be roughly estimated from the measurement of potential on the edges of the interconnect plates. Furthermore, the potential on the current collector was found to be a good indicator of internal current in a cell upon transient operations.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 16, SOFC 2019
EditorsK. Eguchi, S. C. Singhal
PublisherElectrochemical Society Inc.
Pages579-588
Number of pages10
Edition1
ISBN (Electronic)9781607688747
DOIs
Publication statusPublished - 2019 Jan 1
Event16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019 - Kyoto, Japan
Duration: 2019 Sep 82019 Sep 13

Publication series

NameECS Transactions
Number1
Volume91
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

Conference16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019
CountryJapan
CityKyoto
Period19/9/819/9/13

ASJC Scopus subject areas

  • Engineering(all)

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    Tsuchikura, T., Sakamoto, T., Zukawa, T., Sumi, H., Sato, K., Yashiro, K., Hashida, T., & Kawada, T. (2019). Evaluation method of current distribution in SOFC in operation. In K. Eguchi, & S. C. Singhal (Eds.), Solid Oxide Fuel Cells 16, SOFC 2019 (1 ed., pp. 579-588). (ECS Transactions; Vol. 91, No. 1). Electrochemical Society Inc.. https://doi.org/10.1149/09101.0579ecst