Abstract
We present the 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(1 1 1) single crystals, 1 1 1-textured thin Au films and nanometer-sized Au particles on highly oriented pyrolytic graphite (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 are compared with the Au(1 1 1) thin films and the behavior of the Au nano-particles on HOPG.
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