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Study of Ga Doped LSCM as an Anode for SOFC

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Author(s)

A. Ghosh, A. K. Azad, J. T. S. Irvine

School/Research organisations

Abstract

A phase pure La0.75Sr0.25Cr0.4Ga0.1Mn0.5O3 (LSCGM) was synthesized by the solid state reaction method. LSCGM crystallized with rhombohedral symmetry in the space group R-3c. AC impedance measurements using symmetrical cell arrangement showed that the area specific resistance (ASR) was 0.69 Omega cm(2) at 850 degrees C in wet 5% H-2. A three-electrode arrangement with thick electrolyte was used to study the anodic characterization in isolation at various temperatures in wet hydrogen (97 vol% H-2 and 3vol% H2O) and methane (97 vol% CH4 and 3 vol% H2O) over a period of 100 hr. For H-2, the open circuit voltage (OCV) was found to decrease with temperature, whereas a different trend was observed in CH4. The value of anodic polarization (RP) at similar to 868 degrees C was found to be 0.65 Omega cm(2) and 2.0 Omega cm(2) in wet hydrogen and methane respectively. At 900 degrees C, the corresponding values were 0.45 and 1.65 Omega cm(2) respectively. The microstructural study revealed a good LSCMG - YSZ interface even after 100 hr of operation.

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Details

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 12 (SOFC XII)
EditorsSC Singhal, K Eguchi
Place of PublicationPENNINGTON
PublisherELECTROCHEMICAL SOCIETY INC
Pages1337-1343
Number of pages7
ISBN (Print)978-1-60768-212-7
DOIs
Publication statusPublished - 2011
Event12th International Symposium on Solid Oxide Fuel Cells (SOFC) - Montreal
Duration: 1 May 20116 May 2011

Publication series

NameECS Transactions
Number1
Volume35
ISSN (Print)1938-5862

Conference

Conference12th International Symposium on Solid Oxide Fuel Cells (SOFC)
CityMontreal
Period1/05/116/05/11

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