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Kim, Guntae
GUNS Lab
Research Interests
  • Solid Oxide Fuel Cells (SOFCs)& SOE, metal-air batteries, ceramic membranes, PEMFC

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Assessment of perovskite-type La0.8Sr0.2ScxMn1-xO3-delta oxides as anodes for intermediate-temperature solid oxide fuel cells using hydrocarbon fuels

Cited 14 times inthomson ciCited 11 times inthomson ci
Title
Assessment of perovskite-type La0.8Sr0.2ScxMn1-xO3-delta oxides as anodes for intermediate-temperature solid oxide fuel cells using hydrocarbon fuels
Author
Sengodan, S.Yeo, H. J.Shin, J. Y.Kim, Guntae
Keywords
Anode material; Anode polarization; Ceramic anode; Composite anodes; Coulometric titration; Electrical conductivity; Electrochemical performance; Electrolyte-supported cells; Hydrocarbon fuel; Hydrocarbon oxidation; Non-stoichiometric oxygen; Oxygen non-stoichiometry; Oxygen partial pressure; Peak power densities; Solid oxide; Supported palladium catalysts
Issue Date
201103
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v.196, no.6, pp.3083 - 3088
Abstract
Composites formed by the infiltration of 40 wt% La0.8Sr0.2ScxMn1-xO3-delta (LSSM) oxides (x = 0.1, 0.2, 0.3) into 65% porous yttria-stabilized zirconia (YSZ) are investigated as anode materials for intermediate-temperature solid oxide fuel cells for hydrocarbon oxidation. The oxygen non-stoichiometry and electrical conductivity of each LSSM-YSZ composite are determined by coulometric titration. As the concentration of Sc increases, the composites show higher phase stability and the electrical conductivity of LSSM is significantly affected by the Sc doping, the non-stoichiometric oxygen content, and oxygen partial pressure (p(O-2)). To achieve better electrochemical performance, it is necessary to add ceria-supported palladium catalyst for operation with humidified CH4. Anode polarization resistance increases with Sc doping due to a decrease in electrical conductivity. An electrolyte-supported cell with a LSSM-YSZ composite anode delivers peak power densities of 395 and 340 mW cm(-2) at 923 K in humidified (3% H2O) H-2 and CH4, respectively, at a flow rate of 20 mL min(-1).
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DOI
http://dx.doi.org/10.1016/j.jpowsour.2010.11.161
ISSN
0378-7753
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