Oxygen transport properties of dense and porous (La0.8Sr0.2)0.99Co0.8Ni0.2O3-δ

Publication: Research - peer-reviewJournal article – Annual report year: 2009

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We have determined kex and Dchem for (La0.8Sr0.2)0.99Co0.8Ni0.2O3-δ by the use of electrical conductivity relaxation on a dense sample and by applying the ALS model to measured AC impedance spectrum on a porous electrode. Extracting kex and Dchem from the methods resulted in comparable values. kex and Dchem also agreed well with literature values on La0.8Sr0.2CoO3-δ, indicating that nickel substitution does not change the oxygen transport properties. kex of the porous sample was further found to decrease with a five times higher rate than Dchem when measured by using an Electrochemical Impedance Spectroscopy (EIS) over several days.
Original languageEnglish
JournalSolid State Ionics
Publication date2009
Volume180
Journal number23-25
Pages1290-1297
ISSN0167-2738
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 3

Keywords

  • Solid Oxide Fuel Cells, Fuel Cells and hydrogen
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