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Nanostructured Double Perovskite Cathode With Low Sintering Temperature For Intermediate Temperature Solid Oxide Fuel Cells

Authors
Seona KimAreum JunOhhun KwonJunyoung KimSeonyoung YooHu Young Jeong신지영Guntae Kim
Issue Date
Sep-2015
Publisher
WILEY-VCHVERLAGGMBH
Citation
CHEMSUSCHEM, v.8, no.18, pp.3153 - 3158
Journal Title
CHEMSUSCHEM
Volume
8
Number
18
Start Page
3153
End Page
3158
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/147122
DOI
10.1002/cssc.201500509
ISSN
1864-5631
Abstract
This study focuses on reducing the cathode polarization resistance through the use of mixed ionic electronic conductors and the optimization of cathode microstructure to increase the number of electrochemically active sites. Among the available mixed ionic electronic conductors (MIECs), the layered perovskite GdBa0.5Sr0.5CoFeO5+δ (GBSCF) was chosen as a cathode material for intermediate temperature solid oxide fuel cells owing to its excellent electrochemical performance and structural stability. The optimized microstructure of a GBSCF-yttria-stabilized zirconia (YSZ) composite cathode was prepared through an infiltration method with careful control of the sintering temperature to achieve high surface area, adequate porosity, and well-organized connection between nanosized particles to transfer electrons. A symmetric cell shows outstanding results, with the cathode exhibiting an area-specific resistance of 0.006Ω cm2 at 700°C. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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