Impact of nanostructured anode on low-temperature performance of thin-film-based anode-supported solid oxide fuel cells

Title
Impact of nanostructured anode on low-temperature performance of thin-film-based anode-supported solid oxide fuel cells
Authors
박정훈한승민윤경중김형철홍종섭김병국이종호손지원
Keywords
Thin-film-based SOFC; Nanostructured anode; Ni-YSZ; Grain-size effect; Electrode reaction mechanism
Issue Date
2016-05
Publisher
Journal of power sources
Citation
VOL 315, 324-330
Abstract
The impact of a nanostructured Ni–yttria-stabilized zirconia (Ni–YSZ) anode on low-temperature solid oxide fuel cell (LT-SOFC) performance is investigated. By modifying processing techniques for the anode support, anode-supported SOFCs based on thin-film (∼1 μm) electrolytes (TF-SOFCs) with and without the nanostructured Ni–YSZ (grain size ∼100 nm) anode are fabricated and a direct comparison of the TF-SOFCs to reveal the role of the nanostructured anode at low temperature is made. The cell performance of the nanostructured Ni–YSZ anode significantly increases as compared to that of the cell without it, especially at low temperatures (500 °C). The electrochemical analyses confirm that increasing the triple-phase boundary (TPB) density near the electrolyte and anode interface by the particle-size reduction of the anode increases the number of sites available for charge transfer. Thus, the nanostructured anode not only secures the structural integrity of the thin-film components over it, it is also essential for lowering the operating temperature of the TF-SOFC. Although it is widely considered that the cathode is the main factor that determines the performance of LT-SOFCs, this study directly proves that anode performance also significantly affects the low-temperature performance.
URI
http://pubs.kist.re.kr/handle/201004/58721
ISSN
03787753
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KIST Publication > Article
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