Correlation between the defect structure, conductivity and chemical stability of La1-ySryFe1-xAlxO3-delta cathodes for SOFC

Authors
Kuscer, D Holc, J Hrovat, M Kolar, D
Citation
D. Kuscer et al., Correlation between the defect structure, conductivity and chemical stability of La1-ySryFe1-xAlxO3-delta cathodes for SOFC, J EUR CERAM, 21(10-11), 2001, pp. 1817-1820
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN journal
09552219 → ACNP
Volume
21
Issue
10-11
Year of publication
2001
Pages
1817 - 1820
Database
ISI
SICI code
0955-2219(2001)21:10-11<1817:CBTDSC>2.0.ZU;2-6
Abstract
The chemical compatibility of a La1-ySryFe1-xAlxO3-delta cathode and an ytt ria-stabilised ZrO2 electrolyte (YSZ) was studied for solid-oxide fuel cell (SOFC) applications. The Al addition to the LaFe1-xAlxO3 reduces the react ivity with the YSZ associated with increasing tolerance factor. The Sr addi tion to the LaFe1-xAlxO3 leads to Fe4+ and anion-vacancy formation. The Sr addition hinders the formation of La2Zr2O7, but at y greater than or equal to 0.2 promotes the formation of SrZrO3 at the La1-ySryFe1-xAlxO3-delta/YSZ interface. At low p(O-2) the formation of secondary phases is pronounced w hat could be related to the formation of anion vacancy. (C) 2001 Elsevier S cience Ltd. All rights reserved.