Observing the microstructural evolution of Ni-Yttria-stabilized zirconia solid oxide fuel cell anodes

David Kennouche, Yu Chen Karen Chen-Wiegart, Kyle J. Yakal-Kremski, Jun Wang, John W. Gibbs, Peter W. Voorhees, Scott A. Barnett*

*Corresponding author for this work

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

This report describes a transmission X-ray microscopy observation of the high-temperature microstructural evolution of a solid oxide fuel cell Ni-Yttria-stabilized zirconia (Ni-YSZ) anode. Unlike prior studies that compared microstructural differences between different anodes, this three-dimensional measurement directly shows the changes occurring in the same region of an anode, enabling a new understanding of evolutionary processes. High-temperature ageing for 48 h at 1050 °C yielded substantial structural changes in the Ni, YSZ and pore networks, including coalescence of Ni particles, leading to a three-fold decrease in three phase boundary length. Implications for fuel cell long-term degradation are discussed.

Original languageEnglish (US)
Pages (from-to)204-210
Number of pages7
JournalActa Materialia
Volume103
DOIs
StatePublished - Jan 15 2016

Keywords

  • Anodes
  • Degradation
  • Ni-YSZ
  • Solid oxide fuel cell
  • X-ray tomography

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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