Dresden 2011 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 42: Poster I: Progress in Micro- and Nanopatterning: Techniques and Applications (jointly with O); Spins in Organic Materials; Ion Interactions with Nano Scale Materials; Organic Electronics and Photovoltaics; Plasmonics and Nanophotonics (jointly with HL and O); High-k and Low-k Dielectrics (jointly with DF); Organic Thin Films; Nanoengineered Thin Films; Layer Deposition Processes; Layer Properties: Electrical, Optical, and Mechanical Properties; Thin Film Characterisation: Structure Analysis and Composition; Application of Thin Films

DS 42.98: Poster

Mittwoch, 16. März 2011, 15:00–17:30, P1

Surface analysis of Li-ion battery model anodes — •Andreas Seemayer, Philipp Bach, and Frank Uwe Renner — Max Planck Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf

Lithium ion batteries are the most promising power source for future electromobility applications. Research on the battery systems aims to achieve higher rate capability, cycle life, or better safety. To achieve necessary further improvements a better understanding of the basic processes is needed. Following a surface science approach we focus on the investigation of simple model systems (like single crystals or thin film electrodes) of relevant anode materials.

We report investigations of the electrochemical insertion of Lithium in Au, Ag, Al, Mg and Si model surfaces, i.e. alloying and dealloying of Lithium alloys. As electrolyte we use the ionic liquid 1-Butyl-1-methylpyrrolidinium bis(trifluoromethanesolfonyl)imide (PYR14TFSI) with 0.3M LiTFSI. The electrochemical characterisation is performed by Cyclic Voltammetry (CV). The surface and film characterisation regarding its geometrical structure is investigated by means of Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). The chemical composition is characterised ex-situ by Photoelectron Spectroscopy (PES) and Secondary Ion Mass Spectrometry (SIMS).