Electrochemical performance and stability of the cathode for solid oxide fuel cells

V. high performance and stable Pr 2NiO 4 as the cathode for solid oxide fuel cells

X. D. Zhou, J. W. Templeton, Z. Nie, H. Chen, J. W. Stevenson, L. R. Pederson

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

The polarization loss due to oxygen reduction at the cathode in solid oxide fuel cells is a thermally activated process; therefore, as temperature is lowered, the loss becomes substantial. Highly active cathodes have been investigated by several groups; equally important, if not more, is the stability of these electrodes. The high performance and stable Pr 2NiO 4 cathode was studied by impedance spectroscopy and dc current-potential sweeping methods. The power density in Pr 2NiO 4-based anode supported button cells was in the range between 0.65 and 0.7 W/cm 2 at 750 ° C at the external load of 0.8 V. The degradation rate at 0.8 V was approximately 3% per 1000 h up to 2000 h. The electrode resistance is a function of external loads, thus also varies with current densities. The relationship between electrode resistance and external loads is non-linear, which may changes in lattice oxygen nonstoichiometry of the cathodes.

Original languageEnglish
Pages (from-to)44-49
Number of pages6
JournalElectrochimica Acta
Volume71
DOIs
Publication statusPublished - 1 Jun 2012
Externally publishedYes

Fingerprint

Solid oxide fuel cells (SOFC)
Cathodes
Electrodes
Oxygen
Anodes
Current density
Spectroscopy
Polarization
Degradation
Temperature

Keywords

  • Cathode
  • Impedance
  • Performance
  • Solid oxide fuel cells
  • Stability

ASJC Scopus subject areas

  • Electrochemistry
  • Chemical Engineering(all)

Cite this

Electrochemical performance and stability of the cathode for solid oxide fuel cells : V. high performance and stable Pr 2NiO 4 as the cathode for solid oxide fuel cells. / Zhou, X. D.; Templeton, J. W.; Nie, Z.; Chen, H.; Stevenson, J. W.; Pederson, L. R.

In: Electrochimica Acta, Vol. 71, 01.06.2012, p. 44-49.

Research output: Contribution to journalArticle

Zhou, X. D. ; Templeton, J. W. ; Nie, Z. ; Chen, H. ; Stevenson, J. W. ; Pederson, L. R. / Electrochemical performance and stability of the cathode for solid oxide fuel cells : V. high performance and stable Pr 2NiO 4 as the cathode for solid oxide fuel cells. In: Electrochimica Acta. 2012 ; Vol. 71. pp. 44-49.
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