This title appears in the Scientific Report :
2006
Please use the identifier:
http://dx.doi.org/10.1149/1.2170585 in citations.
Please use the identifier: http://hdl.handle.net/2128/2783 in citations.
La0.4Sr0.6Ti1-xMnxO3-d Perovskites as New Anode Materials for Solid Oxide Fuel Cells
La0.4Sr0.6Ti1-xMnxO3-d Perovskites as New Anode Materials for Solid Oxide Fuel Cells
Perovskite oxides, La0.4Sr0.6Ti1-xMnxO3-delta (x=0, 0.2, 0.4, 0.6), have been investigated in the search for new solid oxide fuel cell (SOFC) anode materials. La0.4Sr0.6Ti0.4Mn0.6O3-delta (LSTM4646) shows an electrical conductivity of 22.6 S/cm in air and 1.5 S/cm in wet Ar/4% H-2 [p(O-2)approximate...
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Personal Name(s): | Fu, Q. X. |
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Tietz, F. / Stöver, D. | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IWV-1 JARA-ENERGY; JARA-ENERGY |
Published in: | Journal of the Electrochemical Society, 153 (2006) S. D74 - D83 |
Imprint: |
Pennington, NJ
Electrochemical Society
2006
|
Physical Description: |
D74 - D83 |
DOI: |
10.1149/1.2170585 |
Document Type: |
Journal Article |
Research Program: |
Solid Oxide Fuel Cell Rationelle Energieumwandlung |
Series Title: |
Journal of the Electrochemical Society
153 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/2783 in citations.
Perovskite oxides, La0.4Sr0.6Ti1-xMnxO3-delta (x=0, 0.2, 0.4, 0.6), have been investigated in the search for new solid oxide fuel cell (SOFC) anode materials. La0.4Sr0.6Ti0.4Mn0.6O3-delta (LSTM4646) shows an electrical conductivity of 22.6 S/cm in air and 1.5 S/cm in wet Ar/4% H-2 [p(O-2)approximate to 10(-18) bar] at 810 degrees C. It is thermally and chemically compatible with yttria-stabilized zirconia (YSZ) electrolytes. Three processes govern the electrochemical performance of LSTM4646/YSZ anodes in wet Ar/H-2 or wet CH4. They are proposed to be charge transfer at the LSTM4646/YSZ interface, dissociative adsorption of hydrogen on the electrode surface, and gas conversion impedance, respectively. Due to the low polarization resistance of the LSTM4646/YSZ anode, 0.32 Omega cm(2), an electrolyte-supported H-2/air fuel cell with an LSM/YSZ cathode yields a power density of 365 mW cm(-2) at 0.7 V at 856 degrees C. In addition, this anode material is stable under a moderately humidified hydrogen atmosphere. It shows insignificant catalytic activity for the direct oxidation of methane however. |