Evaluation of stress conditions in operated anode supported type cells based on In-situ raman scattering spectroscopy

Masafumi Nagai, Fumitada Iguchi, Syo Onodera, Noriko Sata, Tatsuya Kawada, Hiroo Yugami

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

9 Citations (Scopus)

Abstract

We have developed a method for evaluating stress conditions in operated SOFCs based on in-situ Raman scattering spectroscopy. This method uses F 2g vibration mode of CeO 2 in interlayer of anode supported type SOFC as a probe, and we can calculate stress m an interlayer, i.e. stress in an electrolyte from the shift of a Raman peak. We apply this method to typical anode supported type cells and evaluate stress conditions during operation. Using this method, stress conditions in the electrolyte before operation is evaluated to be compressive, consistent with XRD and literature. During operation, stress conditions changed by the reduction of NiO to Ni; the compressive stress changed to tensile. In addition, the standard deviation of stresses became larger than before reoxidation, and nonreversible. These results indicate that compressive residual stress introduced into the electrolyte during fabrication process is relaxed, and suggest that an electrolyte becomes mechanically unstable during operation.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 12, SOFC XII
Pages519-525
Number of pages7
Edition1 PART 1
DOIs
Publication statusPublished - 2011 Dec 1
Event12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting - Montreal, QC, Canada
Duration: 2011 May 12011 May 6

Publication series

NameECS Transactions
Number1 PART 1
Volume35
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting
CountryCanada
CityMontreal, QC
Period11/5/111/5/6

ASJC Scopus subject areas

  • Engineering(all)

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