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High-performance thin-film protonic ceramic fuel cells fabricated on anode supports with a non-proton-conducting ceramic matrix

Authors
Bae, KihoNoh, Ho-SungJang, Dong YoungHong, JongsupKim, HyoungchulYoon, Kyung JoongLee, Jong-HoKim, Byung-KookShim, Joon HyungSon, Ji-Won
Issue Date
2016
Publisher
ROYAL SOC CHEMISTRY
Keywords
protonic ceramic fuel cells; thin-film electrolytes; anode supports
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.4, no.17, pp.6395 - 6403
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF MATERIALS CHEMISTRY A
Volume
4
Number
17
Start Page
6395
End Page
6403
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/90367
DOI
10.1039/c5ta10670b
ISSN
2050-7488
Abstract
A novel strategy to fabricate high-performance thin-film protonic ceramic fuel cells (PCFCs) is introduced by building thin-film PCFC components, including BaCe0.55Zr0.3Y0.15O3-delta (BCZY) electrolytes (1.5 mu m) over anode supports consisting of non-proton-conducting ceramic and metal catalytic phases. Ni-yttria-stabilized zirconia (YSZ) was used as supports in this study, which is superior in terms of its well-established facile fabrication process, along with physical and chemical stability, compared to proton-conducting materials. The Ni-YSZ supports provided a flat and smooth deposition surface that facilitates the deposition of the thin film components. A Ni-BCZY anode (similar to 3 mu m), a dense BCZY electrolyte layer (similar to 1.5 mu m), and a porous Ba0.5Sr0.5Co0.8Fe0.2O3-delta cathode (similar to 2 mu m) were sequentially fabricated over the Ni-YSZ substrates using pulsed laser deposition, followed by post-annealing, and the process was optimized for each component. A fully integrated thin-film PCFC microstructure was confirmed, resulting in high open circuit voltages exceeding 1 V at operating temperatures in the range of 450-650 degrees C. A promising fuel cell performance was obtained using the proposed fuel cell configuration, reaching a peak power density of 742 mW cm(-2) at 650 degrees C.
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