TY  - JOUR
AU  - Tavabi, Amir Hossein
AU  - Arai, S.
AU  - Muto, S.
AU  - Tanji, T.
AU  - Dunin-Borkowski, Rafal
TI  - In situ transmission electron microscopy of ionic conductivity and reaction mechanism in ultrathin solid oxide fuel cells
JO  - Microscopy and microanalysis
VL  - 20
IS  - 6
SN  - 1435-8115
CY  - New York, NY
PB  - Cambridge University Press
M1  - FZJ-2015-02562
SP  - 1817 - 1825
PY  - 2014
AB  - Solid oxide fuel cells (SOFCs) are promising candidates for use in alternative energy technologies. A full understanding of the reaction mechanisms in these dynamic material systems is required to optimize device performance and overcome present limitations. Here, we show that in situ transmission electron microscopy (TEM) can be used to study redox reactions and ionic conductivity in SOFCs in a gas environment at elevated temperature. We examine model ultrathin half and complete cells in two environmental TEMs using off-axis electron holography and electron energy-loss spectroscopy. Our results from the model cells provide insight into the essential phenomena that are important for the operation of commercial devices. Changes in the activities of dopant cations in the solid electrolyte are detected during oxygen anion conduction, demonstrating the key role of dopants in electrolyte architecture in SOFCs.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000347233400020
DO  - DOI:10.1017/S143192761401349X
UR  - https://juser.fz-juelich.de/record/189387
ER  -