Three-dimensional reconstruction and analysis of an entire solid oxide fuel cell by full-field transmission X-ray microscopy

J. Scott Cronin, Yu Chen Karen Chen-Wiegart, Jun Wang, Scott A. Barnett*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

An entire active region of an anode-supported solid oxide fuel cell was structurally analyzed by X-ray computed nano-tomography using full-field transmission X-ray microscopy (NANO-TXM). A total three-dimensional volume of ∼38,500 μm3 was imaged, from which Ni-YSZ anode functional layer (∼3650 μm3) and LSM-YSZ cathode functional layer (∼4100 μm3) volumes were reconstructed. These were among the largest-volume electrode reconstructions ever reported, while at the same time exhibiting high spatial resolution of 50 nm. Comparison with electrode microstructures measured using other imaging methods demonstrates that the larger NANO-TXM-measured volumes provided significantly more accurate phase connectivity information. A microstructure-based electrochemical model prediction agreed well with the measured full-cell electrochemical data. The results suggest that low LSM connectivity and slow oxygen reduction reaction kinetics in the cathode were a major limitation to the overall cell performance.

Original languageEnglish (US)
Pages (from-to)174-179
Number of pages6
JournalJournal of Power Sources
Volume233
DOIs
StatePublished - Feb 20 2013

Keywords

  • 3D
  • Electrode
  • Microstructure
  • Reconstruction
  • SOFC
  • X-ray tomography

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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