High-performance thin-film protonic ceramic fuel cells fabricated on anode supports with a non-proton-conducting ceramic matrix
- High-performance thin-film protonic ceramic fuel cells fabricated on anode supports with a non-proton-conducting ceramic matrix
- 김병국; 이종호; 김형철; 손지원; 윤경중; 홍종섭; 배기호; 노호성; 장동영; 심준형
- thin-film PCFC; non-proton-conducting ceramic matrix; BCZY; Ni-BCZY; Ni-YSZ
- Issue Date
- Journal of materials chemistry. A, Materials for energy and sustainability
- VOL 4, NO 17, 6395-6403
- 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.
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