Linking the microstructure, performance and durability of Ni-yttria-stabilized zirconia solid oxide fuel cell anodes using three-dimensional focused ion beam-scanning electron microscopy imaging

James R. Wilson, J. Scott Cronin, Scott A. Barnett

Research output: Contribution to journalArticlepeer-review

92 Scopus citations

Abstract

In this work we demonstrate the utility of three-dimensional focused ion beam-scanning electron microscopy nanotomography for understanding composite electrode performance and degradation. Phase connectivity, electrochemically active triple-phase boundary density and phase tortuosity are calculated for a series of anodes with varying Ni-YSZ composition. These structural characteristics, achievable only through three-dimensional interrogation, are shown to play a vital role in determining electrode polarization resistance. Additionally, Ni-YSZ samples are experimentally annealed in hydrogen and reconstructed to quantitatively assess degradation as a function of reduced triple-phase boundary density.

Original languageEnglish (US)
Pages (from-to)67-72
Number of pages6
JournalScripta Materialia
Volume65
Issue number2
DOIs
StatePublished - Jul 2011

Keywords

  • Electrodes
  • FIB-SEM
  • Microstructure
  • SOFC
  • Tomography

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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