Exploring mixed protonic/electronic conducting oxides as cathode materials for intermediate temperature SOFCs based on proton conducting electrolytes

Emiliana Fabbri*, Isaac Markus, Lei Bi, Daniele Pergolesi, Enrico Traversa

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Novel mixed protonic/electronic conducting perovskite oxides, BaZr 0.8-x-Pr xY 0.2O 3-δ (BZPYx, 0.1 < x < 0.4), were investigated for use as cathode materials in intermediate temperature solid oxide fuel cells (IT-SOFCs) based on proton conducting electrolytes. Chemical stability tests showed that BZPYx oxides were stable in the presence of CO 2 and water vapor. Conductivity measurements of BZPYx were performed in wet (3% H 2O) air atmosphere using electrochemical impedance spectroscopy analysis. Ionic and electronic transport numbers were calculated from conductivity measurements at different oxygen partial pressures, using an established defect model. For all the compositions, electronic conduction decreased with decreasing the temperature. Varying the Pr content, it was found that the ratio between the electronic and ionic conductivity was dependent on the Pr content, being the electronic conductivity proportional to Pr content.

Original languageEnglish (US)
Title of host publicationSolid Oxide Fuel Cells 12, SOFC XII
Pages2305-2311
Number of pages7
Edition3 PART 3
DOIs
StatePublished - Dec 1 2011
Event12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting - Montreal, QC, Canada
Duration: May 1 2011May 6 2011

Publication series

NameECS Transactions
Number3 PART 3
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
Period05/1/1105/6/11

ASJC Scopus subject areas

  • Engineering(all)

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