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Cathode performance of nanostructured La1-aSraCo1-bFebO3-x on a Ce0.8Sm0.2O2 electrolyte prepared by citrate-nitrate autocombustion

Nanostructured La1-aSraCo1-bFebO3-x (a=0.3-0.5; b=0-0.2) and Ce0.8Sm0.2O2 powders were successfully prepared by citrate-nitrate autocombustion synthesis and were characterized by scanning electron microscopy and X-ray diffraction analysis. Electrochemical impedance spectroscopy measurements on symme... Full description

Contained in: Journal of the Electrochemical Society Vol. 154, No. 2 (2007), p. A89-A96
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Links: Additional Link (dx.doi.org)
Additional Keywords: CERVERBINDUNG
COBALTVERBINDUNG
ELEKTRISCHE-LEITFAEHIGKEIT
ELEKTROCHEMISCHE-IMPEDANZSPEKTROMETRIE
FESTELEKTROLYT
HOCHTEMPERATURBRENNSTOFFZELLE
KATHODE
LANTHANVERBINDUNG
NANOPARTIKEL
PULVERHERSTELLUNG
RASTERELEKTRONENMIKROSKOPIE
ROENTGENBEUGUNG
SINTERTECHNIK
STRONTIUMVERBINDUNG
VERBRENNUNGSSYNTHESE
DOI: 10.1149/1.2400611
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 8 Seiten, 30 Quellen
ID (e.g. DOI, URN): 10.1149/1.2400611
PPN (Catalogue-ID): WTI045388539
Note: WTI TEMA DB
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520 |a Nanostructured La1-aSraCo1-bFebO3-x (a=0.3-0.5; b=0-0.2) and Ce0.8Sm0.2O2 powders were successfully prepared by citrate-nitrate autocombustion synthesis and were characterized by scanning electron microscopy and X-ray diffraction analysis. Electrochemical impedance spectroscopy measurements on symmetric cells were performed to evaluate the applicability of La1-aSraCo1-bFebO3-x as a cathode material for intermediate temperature solid oxide fuel cells based on Sm doped-ceria electrolytes. Our results demonstrated that strontium has a positive effect while iron shows a slightly negative effect on the interfacial resistance. The effect of the electrode sintering temperature was investigated by varying the temperature from 850 to 1250 deg C, and the best sintering temperature was found to be 900 deg C. The best characteristics as cathode at intermediate operating temperatures were found for the composition with a=0.4 and the minimum iron doping, b=0.05; at 700 deg C, an area specific resistance of 0.13 Omega cm2 was measured. 
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