NDLI: Fe-substituted SrTiO3−δ–Ce0.9Gd0.1O2 composite anodes for solid oxide fuel cells

Content Provider	Royal Society of Chemistry (RSC)
Author	Poeppelmeier, Kenneth R. Barnett, Scott A. Cronin, J. Scott Cho, Sungmee Miller, Elizabeth C. Fowler, Daniel E.
Copyright Year	2013
Abstract	A new composite solid oxide fuel cell anode material, SrTi1−xFexO3−δ mixed with Gd-doped ceria, was tested in La0.9Sr0.1Ga0.8Mg0.2O3−δ electrolyte-supported cells with La0.4Ce0.6O2 barrier layers and La0.6Sr0.4Fe0.8Co0.2O3 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.
Starting Page	1850
Ending Page	1857
Page Count	8
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	6
Issue Number	6
Journal	Energy & Environmental Science
DOI	10.1039/c3ee23791e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Solid oxide fuel cell Anode Cerium(IV) oxide Oxygen Dielectric spectroscopy Hydrogen Partial pressure Electrolyte
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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