Degradation of LaSr2Fe2CrO9-δ solid oxide fuel cell anodes in phosphine-containing fuels

Mingyang Gong, David Bierschenk, J. Haag, Kenneth R Poeppelmeier, Scott A. Barnett, Chunchuan Xu, John W. Zondlo, Xingbo Liu

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The performance and stability of La0.9Sr0.1Ga0.8Mg0.2O3-δ-electrolyte supported solid oxide fuel cells with composite LaSr2Fe2CrO9-δ-Gd0.1Ce0.9O2 anodes were studied in wet H2 and coal syngas containing phosphine impurity. Introduction of 5-20 ppm PH3 into the fuels caused an initial slow cell performance degradation followed by a very rapid complete cell degradation that initiated within 11-24 h - earlier at higher PH3 concentration. There was no recovery after removing PH3 impurity from the fuels. Electrochemical impedance analysis suggested that the initial gradual performance degradation was due to conductivity loss of the oxide anode due to chemisorption and reaction of phosphine. X-ray diffraction analysis showed the formation of FePx and LaPO4 compounds. The rapid degradation presumably occurred when most or all of the Fe initially present in the LaSr2Fe2CrO9-δ was consumed. Thermodynamic calculations confirmed that Fe is highly reactive with PH3 at 800 °C, even at concentrations below 1 ppm.

Original languageEnglish
Pages (from-to)4013-4021
Number of pages9
JournalJournal of Power Sources
Volume195
Issue number13
DOIs
Publication statusPublished - Jul 1 2010

Fingerprint

phosphine
cell anodes
solid oxide fuel cells
Solid oxide fuel cells (SOFC)
phosphines
Anodes
degradation
Degradation
anodes
Impurities
impurities
synthesis gas
Coal
Chemisorption
cells
coal
chemisorption
Oxides
X ray diffraction analysis
Electrolytes

Keywords

  • Coal syngas
  • Hydrogen
  • LaSrFeCrO anode
  • Phosphine
  • SOFC

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

Cite this

Degradation of LaSr2Fe2CrO9-δ solid oxide fuel cell anodes in phosphine-containing fuels. / Gong, Mingyang; Bierschenk, David; Haag, J.; Poeppelmeier, Kenneth R; Barnett, Scott A.; Xu, Chunchuan; Zondlo, John W.; Liu, Xingbo.

In: Journal of Power Sources, Vol. 195, No. 13, 01.07.2010, p. 4013-4021.

Research output: Contribution to journalArticle

Gong, M, Bierschenk, D, Haag, J, Poeppelmeier, KR, Barnett, SA, Xu, C, Zondlo, JW & Liu, X 2010, 'Degradation of LaSr2Fe2CrO9-δ solid oxide fuel cell anodes in phosphine-containing fuels', Journal of Power Sources, vol. 195, no. 13, pp. 4013-4021. https://doi.org/10.1016/j.jpowsour.2009.12.117
Gong, Mingyang ; Bierschenk, David ; Haag, J. ; Poeppelmeier, Kenneth R ; Barnett, Scott A. ; Xu, Chunchuan ; Zondlo, John W. ; Liu, Xingbo. / Degradation of LaSr2Fe2CrO9-δ solid oxide fuel cell anodes in phosphine-containing fuels. In: Journal of Power Sources. 2010 ; Vol. 195, No. 13. pp. 4013-4021.
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