Abstract
A new composite solid oxide fuel cell anode material, SrTi 1-xFexO3-δ mixed with Gd-doped ceria, was tested in La0.9Sr0.1Ga0.8Mg 0.2O3-δ electrolyte-supported cells with La 0.4Ce0.6O2 barrier layers and La 0.6Sr0.4Fe0.8Co0.2O3 cathodes. The x = 0.7 composition had an anode polarization resistance of 0.17 Ω cm2, at 800 °C in humidified H2, much lower than the value 0.39 Ω cm2 measured for x = 0.4 and 3.14 Ω cm2 for x = 0. The reduced polarization resistance correlated with increased oxygen non-stoichiometry δ, which suggests that it may be related to increased ionic conductivity. Electrochemical impedance spectroscopy (EIS) measurements at 800 °C on the x = 0.7 anode cell showed a main response centered at ∼1 Hz that increased with decreasing hydrogen partial pressure. The maximum power density observed was for the x = 0.7 cell-337 mW cm-2 at 800 °C in air and humidified hydrogen-and was limited mainly by the thick electrolyte.
| Original language | English |
|---|---|
| Pages (from-to) | 1850-1857 |
| Number of pages | 8 |
| Journal | Energy and Environmental Science |
| Volume | 6 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2013 |
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ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Environmental Chemistry
- Pollution
- Nuclear Energy and Engineering
Cite this
Fe-substituted SrTiO3-δ-Ce0.9Gd 0.1O2 composite anodes for solid oxide fuel cells. / Cho, Sungmee; Fowler, Daniel E.; Miller, Elizabeth C.; Cronin, J. Scott; Poeppelmeier, Kenneth R; Barnett, Scott A.
In: Energy and Environmental Science, Vol. 6, No. 6, 06.2013, p. 1850-1857.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Fe-substituted SrTiO3-δ-Ce0.9Gd 0.1O2 composite anodes for solid oxide fuel cells
AU - Cho, Sungmee
AU - Fowler, Daniel E.
AU - Miller, Elizabeth C.
AU - Cronin, J. Scott
AU - Poeppelmeier, Kenneth R
AU - Barnett, Scott A.
PY - 2013/6
Y1 - 2013/6
N2 - A new composite solid oxide fuel cell anode material, SrTi 1-xFexO3-δ mixed with Gd-doped ceria, was tested in La0.9Sr0.1Ga0.8Mg 0.2O3-δ electrolyte-supported cells with La 0.4Ce0.6O2 barrier layers and La 0.6Sr0.4Fe0.8Co0.2O3 cathodes. The x = 0.7 composition had an anode polarization resistance of 0.17 Ω cm2, at 800 °C in humidified H2, much lower than the value 0.39 Ω cm2 measured for x = 0.4 and 3.14 Ω cm2 for x = 0. The reduced polarization resistance correlated with increased oxygen non-stoichiometry δ, which suggests that it may be related to increased ionic conductivity. Electrochemical impedance spectroscopy (EIS) measurements at 800 °C on the x = 0.7 anode cell showed a main response centered at ∼1 Hz that increased with decreasing hydrogen partial pressure. The maximum power density observed was for the x = 0.7 cell-337 mW cm-2 at 800 °C in air and humidified hydrogen-and was limited mainly by the thick electrolyte.
AB - A new composite solid oxide fuel cell anode material, SrTi 1-xFexO3-δ mixed with Gd-doped ceria, was tested in La0.9Sr0.1Ga0.8Mg 0.2O3-δ electrolyte-supported cells with La 0.4Ce0.6O2 barrier layers and La 0.6Sr0.4Fe0.8Co0.2O3 cathodes. The x = 0.7 composition had an anode polarization resistance of 0.17 Ω cm2, at 800 °C in humidified H2, much lower than the value 0.39 Ω cm2 measured for x = 0.4 and 3.14 Ω cm2 for x = 0. The reduced polarization resistance correlated with increased oxygen non-stoichiometry δ, which suggests that it may be related to increased ionic conductivity. Electrochemical impedance spectroscopy (EIS) measurements at 800 °C on the x = 0.7 anode cell showed a main response centered at ∼1 Hz that increased with decreasing hydrogen partial pressure. The maximum power density observed was for the x = 0.7 cell-337 mW cm-2 at 800 °C in air and humidified hydrogen-and was limited mainly by the thick electrolyte.
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U2 - 10.1039/c3ee23791e
DO - 10.1039/c3ee23791e
M3 - Article
VL - 6
SP - 1850
EP - 1857
JO - Energy and Environmental Science
JF - Energy and Environmental Science
SN - 1754-5692
IS - 6
ER -