Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells

Türk, Hanna; Schmidt, Franz; Götsch, Thomas; Girgsdies, Frank; Hammud, Adnan; Ivanov, Danail; Vinke, Izaak C.; de Haart, L. G. J.; Eichel, Rüdiger-A.; Reuter, Karsten; Schlögl, Robert; Knop-Gericke, Axel; Scheurer, Christoph; Lunkenbein, Thomas

doi:10.1002/admi.202100967

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Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells

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Türk, Hanna
Theory, Fritz Haber Institute, Max Planck Society;
Chair for Theoretical Chemistry and Catalysis Research Center, Department of Chemistry, Technische Universität München;

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Schmidt, Franz
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion;

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Götsch, Thomas
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Girgsdies, Frank
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons188971

Hammud, Adnan
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Ivanov, Danail
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Reuter, Karsten
Theory, Fritz Haber Institute, Max Planck Society;
Chair for Theoretical Chemistry and Catalysis Research Center, Department of Chemistry, Technische Universität München;

/persons/resource/persons22071

Schlögl, Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion;

/persons/resource/persons21743

Knop-Gericke, Axel
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion;

/persons/resource/persons260321

Scheurer, Christoph
Theory, Fritz Haber Institute, Max Planck Society;
Chair for Theoretical Chemistry and Catalysis Research Center, Department of Chemistry, Technische Universität München;

/persons/resource/persons41515

Lunkenbein, Thomas
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Türk, H., Schmidt, F., Götsch, T., Girgsdies, F., Hammud, A., Ivanov, D., et al. (2021). Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells. Advanced Materials Interfaces, 8(18): 2100967. doi:10.1002/admi.202100967.

Cite as: https://hdl.handle.net/21.11116/0000-0009-1CAB-8

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.