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

Autor:	Drago Kolar, Danjela Kuscer, Janez Holc, Marko Hrovat
Rok vydání:	2001
Předmět:	chemistry.chemical_classification Aluminium oxides Materials science Inorganic chemistry Analytical chemistry Electrolyte Conductivity chemistry Vacancy defect Materials Chemistry Ceramics and Composites Reactivity (chemistry) Chemical stability Inorganic compound Yttria-stabilized zirconia
Zdroj:	Journal of the European Ceramic Society. 21:1817-1820
ISSN:	0955-2219
DOI:	10.1016/s0955-2219(01)00122-4
Popis:	The chemical compatibility of a La 1– y Sr y Fe 1– x Al x O 3- δ cathode and an yttria-stabilised ZrO 2 electrolyte (YSZ) was studied for solid-oxide fuel cell (SOFC) applications. The Al addition to the LaFe 1– x Al x O 3 reduces the reactivity with the YSZ associated with increasing tolerance factor. The Sr addition to the LaFe 1– x Al x O 3 leads to Fe 4+ and anion-vacancy formation. The Sr addition hinders the formation of La 2 Zr 2 O 7 , but at y ⩾0.2 promotes the formation of SrZrO 3 at the La 1– y Sr y Fe 1– x Al x O 3– δ /YSZ interface. At low p(O 2 ) the formation of secondary phases is pronounced what could be related to the formation of anion vacancy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::da82c99f7e48dcaac2605b0deabeffa3 https://doi.org/10.1016/s0955-2219(01)00122-4 Zobrazit plný text záznamu Full Text from ScienceDirect