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

Title
High-performance thin-film protonic ceramic fuel cells fabricated on anode supports with a non-proton-conducting ceramic matrix
Authors
김병국이종호김형철손지원윤경중홍종섭배기호노호성장동영심준형
Keywords
thin-film PCFC; non-proton-conducting ceramic matrix; BCZY; Ni-BCZY; Ni-YSZ
Issue Date
2016-05
Publisher
Journal of materials chemistry. A, Materials for energy and sustainability
Citation
VOL 4, NO 17, 6395-6403
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− δ (BCZY) electrolytes (1.5 μm) 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 (∼3 μm), a dense BCZY electrolyte layer (∼1.5 μm), and a porous Ba0.5Sr0.5Co0.8Fe0.2O3− δ cathode (∼2 μm) 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 °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 °C.
URI
http://pubs.kist.re.kr/handle/201004/59234
ISSN
20507488
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KIST Publication > Article
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