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

David Kennouche, Jongsup Hong, Ho Sung Noh, Ji Won Son, Scott A. Barnett

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23 Citations (Scopus)

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. This journal is

Original languageEnglish
Pages (from-to)15249-15255
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume16
Issue number29
DOIs
Publication statusPublished - 2014 Aug 7

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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