In situ TEM analysis of a symmetric solid oxide cell in oxygen and vacuum–cation diffusion observations

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Abstract

In order to establish the use of solid oxide fuel/electrolysis cells (SOFC/SOEC) in the energy market, a deeper understanding of degradation effects during operation is necessary. This study apply in situ transmission electron microscopy (TEM) of a symmetric model cell composed by two oxygen electrodes of La0.6Sr0.4CoO3-δ (LSC) and an electrolyte, ZrO2: 8% mol Y2O3 (8YSZ), deposited on 1% Nb doped SrTiO3-δ (STN) single crystal substrate by pulsed laser deposition. The results showed a high cation mobility of the electrodes when exposed to 900 ºC. Cobalt is found to agglomerate at the interface between LSC and STN. Strontium depletion is observed in both electrodes. Finally, a faster grain growth occurs in LSC for the cell exposed to oxygen in comparison with the cell in vacuum.
Original languageEnglish
JournalECS Transactions
Volume75
Issue number42
Pages (from-to)123-133
ISSN1938-6737
DOIs
Publication statusPublished - 2017

Cite this

@article{88515228b7ac49a09dba4c99ee33dfdc,
title = "In situ TEM analysis of a symmetric solid oxide cell in oxygen and vacuum–cation diffusion observations",
abstract = "In order to establish the use of solid oxide fuel/electrolysis cells (SOFC/SOEC) in the energy market, a deeper understanding of degradation effects during operation is necessary. This study apply in situ transmission electron microscopy (TEM) of a symmetric model cell composed by two oxygen electrodes of La0.6Sr0.4CoO3-δ (LSC) and an electrolyte, ZrO2: 8{\%} mol Y2O3 (8YSZ), deposited on 1{\%} Nb doped SrTiO3-δ (STN) single crystal substrate by pulsed laser deposition. The results showed a high cation mobility of the electrodes when exposed to 900 ºC. Cobalt is found to agglomerate at the interface between LSC and STN. Strontium depletion is observed in both electrodes. Finally, a faster grain growth occurs in LSC for the cell exposed to oxygen in comparison with the cell in vacuum.",
author = "Fabrizio Gualandris and Simonsen, {S{\o}ren Bredmose} and Wagner, {Jakob Birkedal} and Simone Sanna and S. Muto and Kuhn, {Luise Theil}",
year = "2017",
doi = "10.1149/07542.0123ecst",
language = "English",
volume = "75",
pages = "123--133",
journal = "E C S Transactions",
issn = "1938-5862",
publisher = "The Electrochemical Society",
number = "42",

}

In situ TEM analysis of a symmetric solid oxide cell in oxygen and vacuum–cation diffusion observations. / Gualandris, Fabrizio; Simonsen, Søren Bredmose; Wagner, Jakob Birkedal; Sanna, Simone; Muto, S.; Kuhn, Luise Theil.

In: ECS Transactions, Vol. 75, No. 42, 2017, p. 123-133.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - In situ TEM analysis of a symmetric solid oxide cell in oxygen and vacuum–cation diffusion observations

AU - Gualandris, Fabrizio

AU - Simonsen, Søren Bredmose

AU - Wagner, Jakob Birkedal

AU - Sanna, Simone

AU - Muto, S.

AU - Kuhn, Luise Theil

PY - 2017

Y1 - 2017

N2 - In order to establish the use of solid oxide fuel/electrolysis cells (SOFC/SOEC) in the energy market, a deeper understanding of degradation effects during operation is necessary. This study apply in situ transmission electron microscopy (TEM) of a symmetric model cell composed by two oxygen electrodes of La0.6Sr0.4CoO3-δ (LSC) and an electrolyte, ZrO2: 8% mol Y2O3 (8YSZ), deposited on 1% Nb doped SrTiO3-δ (STN) single crystal substrate by pulsed laser deposition. The results showed a high cation mobility of the electrodes when exposed to 900 ºC. Cobalt is found to agglomerate at the interface between LSC and STN. Strontium depletion is observed in both electrodes. Finally, a faster grain growth occurs in LSC for the cell exposed to oxygen in comparison with the cell in vacuum.

AB - In order to establish the use of solid oxide fuel/electrolysis cells (SOFC/SOEC) in the energy market, a deeper understanding of degradation effects during operation is necessary. This study apply in situ transmission electron microscopy (TEM) of a symmetric model cell composed by two oxygen electrodes of La0.6Sr0.4CoO3-δ (LSC) and an electrolyte, ZrO2: 8% mol Y2O3 (8YSZ), deposited on 1% Nb doped SrTiO3-δ (STN) single crystal substrate by pulsed laser deposition. The results showed a high cation mobility of the electrodes when exposed to 900 ºC. Cobalt is found to agglomerate at the interface between LSC and STN. Strontium depletion is observed in both electrodes. Finally, a faster grain growth occurs in LSC for the cell exposed to oxygen in comparison with the cell in vacuum.

U2 - 10.1149/07542.0123ecst

DO - 10.1149/07542.0123ecst

M3 - Journal article

VL - 75

SP - 123

EP - 133

JO - E C S Transactions

JF - E C S Transactions

SN - 1938-5862

IS - 42

ER -