Operational Inhomogeneities in La0.9Sr0.1Ga 0.8Mg0.2O3-δ Electrolytes and La 0.8Sr0.2Cr0.82Ru0.18O 3-δ-Ce0.9Gd0.1O2-δ Composite Anodes for Solid Oxide Fuel Cells

Y. Liao*, D. M. Bierschenk, S. A. Barnett, L. D. Marks

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

The electrolyte/anode interface in solid oxide fuel cells with La 0.9Sr0.1Ga0.8Mg0.2O 3-δ electrolytes and composite anodes containing La 0.8Sr0.2Cr0.82Ru0.18O 3-δ and Ce0.9Gd0.1O2-δ (GDC) was studied using transmission electron microscope Z-contrast imaging and energy dispersive X-ray spectroscopy. The anode/electrolyte interface of an operated cell had numerous defective regions in the electrolyte, immediately adjacent to anode GDC particles. These areas had a different chemical composition than other electrolyte regions and were crystallographically inhomogeneous. These regions were not observed in a cell reduced in hydrogen that was not operated, suggesting that they were the result of combined electrical and chemical potential gradients present during cell operation. Ru nanoparticles were observed on the chromite surfaces of the operated.

Original languageEnglish (US)
Pages (from-to)635-641
Number of pages7
JournalFuel Cells
Volume11
Issue number5
DOIs
StatePublished - Oct 1 2011

Keywords

  • Catalyst
  • Chromite Anode
  • Degradation
  • Interface
  • LSGM Electrolyte
  • Microstructure
  • Nano
  • Ruthenium
  • SOFC
  • TEM

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology

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