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Electrochemical properties of composite cathodes using Sm doped layered perovskite for intermediate temperature-operating solid oxide fuel cell

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Irvine_2017_ASS_CompositeCathodes_AAM.pdf (558.7Kb)
Date
28/02/2018
Author
Baek, Seung-Wook
Azad, Abul K.
Irvine, John T. S.
Choi, Won Seok
Kang, Hyunil
Kim, Jung Hyun
Keywords
Intermediate temperature-operating solid oxide fuel cell
Layered peorvksite
Area specific resistance
Percolation
Composite cathode
QD Chemistry
NDAS
Metadata
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Abstract
SmBaCo2O5+d (SBCO) showed the lowest observed Area Specific Resistance (ASR) value in the LnBaCo2O5+d (Ln: Pr, Nd, Sm, and Gd) oxide system for the overall temperature ranges tested. The ASR of a composite cathode (mixture of SBCO and Ce0.9Gd0.1O2−d) on a Ce0.9Gd0.1O2−d (CGO91) electrolyte decreased with respect to the CGO91 content; the percolation limit was also achieved for a 50 wt% SBCO and 50 wt% CGO91 (SBCO50) composite cathode. The ASRs of SBCO50 on the dense CGO91 electrolyte in the overall temperature range of 500 to 750 °C were relatively lower than those of SBCO50 on the CGO91 coated dense 8 mol % yttria-stabilized zirconia (8YSZ) electrolyte for the same temperature range. From 750 °C and for all higher temperatures tested, however, the ASRs of SBCO50 on the CGO91 coated dense 8YSZ electrolyte were lower than those of the CGO91 electrolyte. The maximum power densities of SBCO50 on the Ni-8YSZ/8YSZ/CGO91 buffer layer were 1.034 W cm−2 and 0.611 W cm−2 at 800 °C and 700 °C.
Citation
Baek , S-W , Azad , A K , Irvine , J T S , Choi , W S , Kang , H & Kim , J H 2018 , ' Electrochemical properties of composite cathodes using Sm doped layered perovskite for intermediate temperature-operating solid oxide fuel cell ' , Applied Surface Science , vol. 432 , no. B , pp. 272-277 . https://doi.org/10.1016/j.apsusc.2017.02.211
Publication
Applied Surface Science
Status
Peer reviewed
DOI
https://doi.org/10.1016/j.apsusc.2017.02.211
ISSN
0169-4332
Type
Journal article
Rights
© 2017 Elsevier Ltd. All rights reserved. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.apsusc.2017.02.211
Description
The authors are grateful for the support of the Basic Science Research Program, part of the National Research Foundation of Korea (NRF), funded by the Ministry of Science, ICT and Future Planning (No. 2014R1A1A1004163).
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/12778

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