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
SN - 1938-6737
VL - 75
SP - 123
EP - 133
JO - ECS Transactions
JF - ECS Transactions
IS - 42
ER -