Berlin 2008 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 18: Poster Session I - MA 141/144 (Atomic Wires; Size-Selected Clusters; Nanostructures; Metal Substrates: Clean Surfaces+Adsorption of Organic / Bio Molecules+Solid-Liquid Interfaces+Adsorption of O and/or H; Surface or Interface Magnetism; Oxides and Insulators: Clean Surfaces)
O 18.40: Poster
Montag, 25. Februar 2008, 18:30–19:30, Poster F
Au model anodes for Li-ion batteries studied by in-situ X-ray diffraction — •Frank Uwe Renner1,2 and Hiroyuki Kageyama2 — 1MPI für Eisenforschung, Düsseldorf, Germany — 2AIST, UBIQEN, Ikeda, Osaka, Japan
We present first results of experiments on the electrochemically-driven alloying and de-alloying of Au substrates with Li-ions from organic electrolytes studied by in-situ X-ray diffraction employing Synchrotron radiation. Au(111) single crystals, 111-textured thin Au films and nanometer-sized Au particles on HOPG have been examined using a specially designed in-situ X-ray cell. Starting from single crystalline Au systems we could follow the structural degradation and pulverization under different electrochemical conditions. Reciprocal lattice space maps show the occurrence of powder-like intensity associated with different Li-Au alloy phases. The diffraction data from the bulk Au crystals is compared with the Au(111) thin films and the behavior of the Au nano-particles on HOPG.