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A perovskite oxide with high conductivities in both air and reducing atmosphere for use as electrode for solid oxide fuel cells

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Lan, Rong, Cowin, Peter I., Sengodan, Sivaprakash and Tao, Shanwen (2016) A perovskite oxide with high conductivities in both air and reducing atmosphere for use as electrode for solid oxide fuel cells. Scientific Reports, 6 . 31839. doi:10.1038/srep31839 ISSN 2045-2322.

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Official URL: http://dx.doi.org/10.1038/srep31839

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Abstract

Electrode materials which exhibit high conductivities in both oxidising and reducing atmospheres are in high demand for solid oxide fuel cells (SOFCs) and solid oxide electrolytic cells (SOECs). In this paper, we investigated Cu-doped SrFe0.9Nb0.1O3−δ finding that the primitive perovskite oxide SrFe0.8Cu0.1Nb0.1O3−δ (SFCN) exhibits a conductivity of 63 Scm−1and 60 Scm−1 at 415 °C in air and 5%H2/Ar respectively. It is believed that the high conductivity in 5%H2/Ar is related to the exsolved Fe (or FeCu alloy) on exposure to a reducing atmosphere. To the best of our knowledge, the conductivity of SrFe0.8Cu0.1Nb0.1O3−δ in a reducing atmosphere is the highest of all reported oxides which also exhibit a high conductivity in air. Fuel cell performance using SrFe0.8Cu0.1Nb0.1O3−δ as the anode, (Y2O3)0.08(ZrO2)0.92 as the electrolyte and La0.8Sr0.2FeO3−δ as the cathode achieved a power density of 423 mWcm−2 at 700 °C indicating that SFCN is a promising anode for SOFCs.

Item Type: Journal Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > Engineering > Engineering
Library of Congress Subject Headings (LCSH): Fuel cells , Electrodes, Electric conductors, Perovskite
Journal or Publication Title: Scientific Reports
Publisher: Nature Publishing Group
ISSN: 2045-2322
Official Date: 22 August 2016
Dates:
DateEvent
22 August 2016Published
26 July 2016Available
UNSPECIFIEDAccepted
Volume: 6
Article Number: 31839
DOI: 10.1038/srep31839
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 31 August 2016
Date of first compliant Open Access: 31 August 2016
Funder: Engineering and Physical Sciences Research Council (EPSRC)
Grant number: EP/K021036/2, EP/I037016/1, EP/G030995/1
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