TEM and ETEM study of SrZrO3 formation at LSCF/GDC/YSZ interfaces

J. Matsuda, S. Kanae, T. Kawabata, J. T. Chou, Y. Inoue, S. Taniguchi, K. Sasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

Transmission electron microscopic (TEM) studies have revealed SrZrO3 formation and growth at La0.6Sr0.4Co0.2Fe0.8O3 (LSCF)/Ce0.9Gd0.1O2 (GDC)/yttria-stabilized zirconia (YSZ) interfaces in solid oxide fuel cells (SOFCs). SrZrO3 forms first at the GDC/YSZ interface: at the interface between the GDC dense layer and the YSZ, at grain boundaries in the GDC dense layer, and on the surface of the GDC dense layer during the sintering of LSCF at 1100°C. Then, SrZrO3 grows to both sides of the YSZ electrolyte and the porous GDC layer. Electron energy loss spectroscopy revealed the inter-diffusion of La, Ce, and Gd as well as Sr and Zr in the vicinity of the GDC/YSZ interface. La was a solute in SrZrO3, and SrZrO3 exhibited a tetragonal crystal structure with a double pseudo-cubic perovskite sub-cell. Nucleation and growth of the SrZrO3 orthorhombic phase was observed at 800°C under an O2 atmosphere in an environmental TEM.

Original languageEnglish
Title of host publicationECS Transactions
EditorsT. Kawada, S. C. Singhal
PublisherElectrochemical Society Inc.
Pages993-1001
Number of pages9
Edition1
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - May 30 2017
Event15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 - Hollywood, United States
Duration: Jul 23 2017Jul 28 2017

Publication series

NameECS Transactions
Number1
Volume78
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017
CountryUnited States
CityHollywood
Period7/23/177/28/17

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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