Three-dimensional microstructure of high-performance pulsed-laser deposited Ni-YSZ SOFC anodes

Title
Three-dimensional microstructure of high-performance pulsed-laser deposited Ni-YSZ SOFC anodes
Authors
David Kennouche홍종섭노호성손지원Scott A. Barnett
Keywords
Thin film SOFC; Nanostructure anode; 3-D microstructure; FIB; PLD
Issue Date
2014-08
Publisher
Physical chemistry chemical physics : PCCP
Citation
VOL 16, NO 29, 15249-15255
Abstract
The Ni–yttria-stabilized zirconia (YSZ) anode functional layer in solid oxide fuel cells produced by pulsed laser-deposition was studied using three-dimensional tomography. Anode feature sizes of ~130 nm were quite small relative to typical anodes, but errors arising in imaging and segmentation were shown using a sensitivity analysis to be acceptable. Electrochemical characterization showed that these cells achieved a relatively high maximum power density of 1.4 W cm−2 with low cell resistance at an operating temperature of 600 °C. The tomographic data showed anode three-phase boundary density of ~56 μm−2, more than 10 times the value observed in conventional Ni–YSZ anodes. Anode polarization resistance values, predicted by combining the structural data and literature values of three-phase boundary resistance in an electrochemical model, were consistent with measured electrochemical impedance spectra, explaining the excellent intermediate-temperature performance of these cells.
URI
http://pubs.kist.re.kr/handle/201004/47795
ISSN
14639076
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KIST Publication > Article
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