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Semiconductor-ionic Membrane of LaSrCoFe-oxide-doped Ceria Solid Oxide Fuel Cells
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.ORCID iD: 0000-0002-3133-7031
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2017 (English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 248, p. 496-504Article in journal (Refereed) Published
Abstract [en]

A novel semiconductor-ionic La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF)-Sm/Ca co-doped CeO2 (SCDC) nanocomposite has been developed as a membrane, which is sandwiched between two layers of Ni0.8Co0.15Al0.05Li-oxide (NCAL) to construct semiconductor-ion membrane fuel cell (SIMFC). Such a device presented an open circuit voltage (OCV) above 1.0 V and maximum power density of 814 mW cm(-2) at 550 degrees C, which is much higher than 0.84 V and 300 mW cm(-2) for the fuel cell using the SCDC membrane. Moreover, the SIMFC has a relatively promising long-term stability, the voltage can maintain at 0.966 V for 60 hours without degradation during the fuel cells operation and the open-circuit voltage (OCV) can return to 1.06 V after long-term fuel cell operation. The introduction of LSCF electronic conductor into the membrane did not cause any short circuit but brought significant enhancement of fuel cell performances. The Schottky junction is proposed to prevent the internal electrons passing thus avoiding the device short circuiting problem.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2017. Vol. 248, p. 496-504
Keywords [en]
semiconductor-ionic membrane, solid oxide fuel cells, co-doped ceria, Schottky junction, short circuit
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Other Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-214874DOI: 10.1016/j.electacta.2017.07.128ISI: 000409525300055Scopus ID: 2-s2.0-85026786096OAI: oai:DiVA.org:kth-214874DiVA, id: diva2:1152326
Note

QC 20171024

Available from: 2017-10-24 Created: 2017-10-24 Last updated: 2017-10-24Bibliographically approved

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Xia, ChenAfzal, MuhammadZhu, Bin

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