An in situ diffraction study of a solid oxide fuel cell system

L. Sörby; F.W. Poulsen; H.F. Poulsen; S. Garbe; J.O. Thomas

An in situ diffraction study of a solid oxide fuel cell system

L. Sörby, F.W. Poulsen, H.F. Poulsen, S. Garbe, J.O. Thomas

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

The design of a synchrotron diffraction experiment on a working SOFC air-electrode is outlined. A large number of diffraction data sets were collected successfully from LSM/YSZ/Ag cells under different polarization states at 850 degrees C. Systematic changes are observed in lattice parameters and FWHM's for the LSM phase when the cell is polarized. The peak positions for the YSZ electrode are unchanged throughout the entire experiment. This is the first experimental evidence that oxygen stoichiometry in LSM is strongly influenced by the electrochemical reactions which take place. The cell parameters increase under reducing conditions, due to a decrease in the oxygen content of the LSM. All observed changes seem to be reversible.

Original language	English
Title of host publication	Proceedings of 5th European Powder Diffraction Conference
Volume	278-281
Publisher	Transtec Publications LTD
Publication date	1998
Pages	408-413
ISBN (Print)	0-87849-807-9
Publication status	Published - 1998
Event	European Powder Diffraction Conference 1997 - Parma, Italy Duration: 25 May 1997 → 28 May 1997 Conference number: 5 http://epdic.ing.unitn.it/html/past-future_events.html

Conference

Conference	European Powder Diffraction Conference 1997
Number	5
Country/Territory	Italy
City	Parma
Period	25/05/1997 → 28/05/1997
Internet address	http://epdic.ing.unitn.it/html/past-future_events.html

Series	Materials Science Forum
ISSN	0255-5476

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title = "An in situ diffraction study of a solid oxide fuel cell system",

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An in situ diffraction study of a solid oxide fuel cell system. / Sörby, L.; Poulsen, F.W.; Poulsen, H.F. et al.
Proceedings of 5th European Powder Diffraction Conference. Vol. 278-281 Transtec Publications LTD, 1998. p. 408-413 (Materials Science Forum).

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

TY - GEN

T1 - An in situ diffraction study of a solid oxide fuel cell system

AU - Sörby, L.

AU - Poulsen, F.W.

AU - Poulsen, H.F.

AU - Garbe, S.

AU - Thomas, J.O.

N1 - Conference code: 5

PY - 1998

Y1 - 1998

N2 - The design of a synchrotron diffraction experiment on a working SOFC air-electrode is outlined. A large number of diffraction data sets were collected successfully from LSM/YSZ/Ag cells under different polarization states at 850 degrees C. Systematic changes are observed in lattice parameters and FWHM's for the LSM phase when the cell is polarized. The peak positions for the YSZ electrode are unchanged throughout the entire experiment. This is the first experimental evidence that oxygen stoichiometry in LSM is strongly influenced by the electrochemical reactions which take place. The cell parameters increase under reducing conditions, due to a decrease in the oxygen content of the LSM. All observed changes seem to be reversible.

AB - The design of a synchrotron diffraction experiment on a working SOFC air-electrode is outlined. A large number of diffraction data sets were collected successfully from LSM/YSZ/Ag cells under different polarization states at 850 degrees C. Systematic changes are observed in lattice parameters and FWHM's for the LSM phase when the cell is polarized. The peak positions for the YSZ electrode are unchanged throughout the entire experiment. This is the first experimental evidence that oxygen stoichiometry in LSM is strongly influenced by the electrochemical reactions which take place. The cell parameters increase under reducing conditions, due to a decrease in the oxygen content of the LSM. All observed changes seem to be reversible.

KW - Industrielle materialer

M3 - Article in proceedings

SN - 0-87849-807-9

VL - 278-281

T3 - Materials Science Forum

SP - 408

EP - 413

BT - Proceedings of 5th European Powder Diffraction Conference

PB - Transtec Publications LTD

T2 - European Powder Diffraction Conference 1997

Y2 - 25 May 1997 through 28 May 1997

ER -

An in situ diffraction study of a solid oxide fuel cell system

Abstract

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