Journal Article

FZJ-2021-05750

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells

Türk, H. ; Schmidt, F.-P. ; Götsch, T. (Corresponding author) ; Girgsdies, F. ; Hammud, A. ; Ivanov, D. ; Vinke, I. C.FZJ* ; de Haart, L. G. J.FZJ* ; Eichel, R.-A.FZJ*RWTH* ; Reuter, K. ; Schlögl, R. ; Knop-Gericke, A. ; Scheurer, C. ; Lunkenbein, T.

2021
Wiley-VCH Weinheim

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Please use a persistent id in citations: http://hdl.handle.net/2128/29849  doi:10.1002/admi.202100967

Abstract: 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.

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Contributing Institute(s):

1. Grundlagen der Elektrochemie (IEK-9)

Research Program(s):

1. 1232 - Power-based Fuels and Chemicals (POF4-123) (POF4-123)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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