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

doi:10.1149/07801.0993ecst

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 proceeding › Conference contribution

16 Citations (Scopus)

Abstract

Transmission electron microscopic (TEM) studies have revealed SrZrO₃ formation and growth at La_0.6Sr_0.4Co_0.2Fe_0.8O₃ (LSCF)/Ce_0.9Gd_0.1O₂ (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 language	English
Title of host publication	ECS Transactions
Editors	S. C. Singhal, T. Kawada
Publisher	Electrochemical Society Inc.
Pages	993-1001
Number of pages	9
Edition	1
ISBN (Electronic)	9781607688150, 9781607688150
DOIs	https://doi.org/10.1149/07801.0993ecst
Publication status	Published - May 30 2017
Event	15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 - Hollywood, United States Duration: Jul 23 2017 → Jul 28 2017

Publication series

Name	ECS Transactions
Number	1
Volume	78
ISSN (Print)	1938-6737
ISSN (Electronic)	1938-5862

Other

Other	15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017
Country/Territory	United States
City	Hollywood
Period	7/23/17 → 7/28/17

All Science Journal Classification (ASJC) codes

Engineering(all)

Access to Document

10.1149/07801.0993ecst

Cite this

Matsuda, J, Kanae, S, Kawabata, T, Chou, JT, Inoue, Y , Taniguchi, S & Sasaki, K 2017, TEM and ETEM study of SrZrO₃ formation at LSCF/GDC/YSZ interfaces. in SC Singhal & T Kawada (eds), ECS Transactions. 1 edn, ECS Transactions, no. 1, vol. 78, Electrochemical Society Inc., pp. 993-1001, 15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017, Hollywood, United States, 7/23/17. https://doi.org/10.1149/07801.0993ecst

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title = "TEM and ETEM study of SrZrO3 formation at LSCF/GDC/YSZ interfaces",

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.",

author = "J. Matsuda and S. Kanae and T. Kawabata and Chou, {J. T.} and Y. Inoue and S. Taniguchi and K. Sasaki",

note = "Funding Information: This study was partly supported by the New Energy and Industrial Technology Development Organization (NEDO), Japan. We thank Prof. H. Yokokawa and the NEDO project team members for their helpful suggestions and comments. Publisher Copyright: {\textcopyright} The Electrochemical Society.; 15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 ; Conference date: 23-07-2017 Through 28-07-2017",

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AU - Matsuda, J.

AU - Kanae, S.

AU - Kawabata, T.

AU - Chou, J. T.

AU - Inoue, Y.

AU - Taniguchi, S.

AU - Sasaki, K.

N1 - Funding Information: This study was partly supported by the New Energy and Industrial Technology Development Organization (NEDO), Japan. We thank Prof. H. Yokokawa and the NEDO project team members for their helpful suggestions and comments. Publisher Copyright: © The Electrochemical Society.

PY - 2017/5/30

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N2 - 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.

AB - 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.

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