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

Francesca Deganello, Vincenzo Esposito, Enrico Traversa, Masaru Miyayama

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

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 auto-combustion 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 Single Chamber Solid Oxide Fuel Cells. 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 °C to 1250 °C and the best sintering temperature was found to be 900 °C. The best characteristics as cathode around the operating temperature of Single Chamber Fuel Cells were found for the composition with a=0.4 and the minimum iron doping; at 700°C, an Area Specific Resistance of 0.13 Ω·cm2 was measured.
Original languageEnglish
JournalE C S Transactions
Volume1
Issue number7
Pages (from-to)219-232
ISSN1938-5862
DOIs
Publication statusPublished - 2006
Externally publishedYes
Event208th ECS Meeting - Los Angeles, California, United States
Duration: 16 Oct 200521 Oct 2005

Conference

Conference208th ECS Meeting
Country/TerritoryUnited States
CityLos Angeles, California
Period16/10/200521/10/2005

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