TY  - JOUR
AU  - Türk, Hanna
AU  - Schmidt, Franz-Philipp
AU  - Götsch, Thomas
AU  - Girgsdies, Frank
AU  - Hammud, Adnan
AU  - Ivanov, Danail
AU  - Vinke, Izaak C.
AU  - de Haart, L. G. J.
AU  - Eichel, Rüdiger-A.
AU  - Reuter, Karsten
AU  - Schlögl, Robert
AU  - Knop-Gericke, Axel
AU  - Scheurer, Christoph
AU  - Lunkenbein, Thomas
TI  - Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells
JO  - Advanced materials interfaces
VL  - 8
IS  - 18
SN  - 2196-7350
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2021-05750
SP  - 2100967 -
PY  - 2021
AB  - Rapid deactivation presently limits a wide spread use of high-temperature solid oxide cells (SOCs) as otherwise highly efficient chemical energy converters. With deactivation triggered by the ongoing conversion reactions, an atomic-scale understanding of the active triple-phase boundary between electrolyte, electrode, and gas phase is essential to increase cell performance. Here, a multi-method approach is used comprising transmission electron microscopy and first-principles calculations and molecular simulations to untangle the atomic arrangement of the prototypical SOC interface between a lanthanum strontium manganite (LSM) anode and a yttria-stabilized zirconia (YSZ) electrolyte in the as-prepared state after sintering. An interlayer of self-limited width with partial amorphization and strong compositional gradient is identified, thus exhibiting the characteristics of a complexion that is stabilized by the confinement between two bulk phases. This offers a new perspective to understand the function of SOCs at the atomic scale. Moreover, it opens up a hitherto unrealized design space to tune the conversion efficiency.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000689640100001
DO  - DOI:10.1002/admi.202100967
UR  - https://juser.fz-juelich.de/record/904180
ER  -