A composite oxygen-reduction electrode composed of SrSc 0.2Co0.8O3-δ perovskite and Sm 0.2Ce0.8O1.9 for an intermediate-temperature solid-oxide fuel cell

An, Baoming, Zhou, Wei, Guo, Youmin, Ran, Ran and Shao, Zongping (2010) A composite oxygen-reduction electrode composed of SrSc 0.2Co0.8O3-δ perovskite and Sm 0.2Ce0.8O1.9 for an intermediate-temperature solid-oxide fuel cell. International Journal of Hydrogen Energy, 35 11: 5601-5610. doi:10.1016/j.ijhydene.2010.03.044


Author An, Baoming
Zhou, Wei
Guo, Youmin
Ran, Ran
Shao, Zongping
Title A composite oxygen-reduction electrode composed of SrSc 0.2Co0.8O3-δ perovskite and Sm 0.2Ce0.8O1.9 for an intermediate-temperature solid-oxide fuel cell
Formatted title
A composite oxygen-reduction electrode composed of SrSc0.2Co0.8O3-δ perovskite and Sm0.2Ce0.8O1.9 for an intermediate-temperature solid-oxide fuel cell
Journal name International Journal of Hydrogen Energy   Check publisher's open access policy
ISSN 0360-3199
1879-3487
Publication date 2010-06-01
Sub-type Article (original research)
DOI 10.1016/j.ijhydene.2010.03.044
Open Access Status Not Open Access
Volume 35
Issue 11
Start page 5601
End page 5610
Total pages 10
Place of publication Camden, London, United Kingdom
Publisher Elsevier
Language eng
Formatted abstract
SSC (70 wt.% SrSc0.2Co0.8O3-δ)-SDC (30 wt.% Sm0.2Ce0.8O1.9) composite was evaluated as cathode for intermediate-temperature solid-oxide fuel cells. The effect of firing temperature on the chemical interaction between SSC and SDC was characterized by oxygen-temperature programmed desorption (O2-TPD) techniques. Certain type of phase reactions occurred between SSC and SDC at calcination temperatures higher than 950 °C. The conductivity of the composite was measured by a four-prober direct current technique. The electro-catalytic activity of the composite electrode for oxygen reduction was measured by electrochemical impedance spectroscopy (EIS) in a symmetric cell configuration. The electrode fired at 950 °C showed the best performance. By applying the SSC + SDC-composite electrode, a cell with a ∼20-μm thick SDC electrolyte delivered a peak power density of 760 mW cm-2 at 600 °C. This suggested that an SSC + SDC-composite electrode may be a promising cathode for intermediate-temperature solid-oxide fuel cells.
Keyword Cathode
Composite electrode
Perovskite
Solid-oxide fuel cells
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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