%0 Journal Article
%A Türk, Hanna
%A Schmidt, Franz-Philipp
%A Götsch, Thomas
%A Girgsdies, Frank
%A Hammud, Adnan
%A Ivanov, Danail
%A Vinke, Izaak C.
%A de Haart, L. G. J.
%A Eichel, Rüdiger-A.
%A Reuter, Karsten
%A Schlögl, Robert
%A Knop-Gericke, Axel
%A Scheurer, Christoph
%A Lunkenbein, Thomas
%T Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells
%J Advanced materials interfaces
%V 8
%N 18
%@ 2196-7350
%C Weinheim
%I Wiley-VCH
%M FZJ-2021-05750
%P 2100967 -
%D 2021
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000689640100001
%R 10.1002/admi.202100967
%U https://juser.fz-juelich.de/record/904180