Hanna Türk, Franz-Philipp Schmidt, Thomas Götsch, Frank Girgsdies, Adnan Hammud, Danail Ivanov, Izaak C. Vinke, L.G.J. (Bert) de Haart, Rüdiger-A. Eichel, Karsten Reuter, Robert Schlögl, Axel Knop-Gericke, Christoph Scheurer, Thomas LunkenbeinIn this work, we have investigated the electrolyte-anode interface of solid state electrolysis cells using modern methods of electron microscopy, X-ray spectroscopy, first-principle calculations, and molecular simulation together with scientists from the Electronic Structure Group of the AC Department and the Theory Department of FHI. No classical interface was found, but a complexion. This intermediate phase is less crystalline than the two oxides and is depleted in Sr. This finding can be explained by the degraded periodicity of the oxygen sublattice. The study reveals a new structural picture of such interfaces and we hope to use this model in the future to better explain the origin of the structural instability.
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