Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)
O 35.102: Poster
Dienstag, 27. März 2012, 18:15–21:45, Poster B
Ion conduction in glass ceramics: Influence of nanoscopic boundary surfaces in experiment and simulation — •Marvin Stiefermann1, Dirk Dietzel2, André Schirmeisen2, Harald Fuchs1, and Bernhard Roling3 — 1Physikalisches Institut, University of Münster and CeNTech, Center for Nanotechnology, Münster — 2Institut für Angwandte Physik, University of Gießen — 3Department Chemie, Universität Marburg
The ongoing progress in miniaturization leads to a constantly increasing number of mobile electronic devices. The largest factor limiting the usability of the devices is the battery endurance. Hence further research is needed for a better understanding leading to higher battery performance. We analysed a solid electrolyte as found in modern batteries using a N2 cooled variable temperature atomic force microscope. Electrostatic force spectroscopy in the time domain (TDEFS) was employed to study the relaxation times of ions within nanoscopic subvolumes of a phase separated glass ceramic, consisting of a well conducting glassy phase and poorly conducting crystalline phase. An effect observed earlier in ion conduction studies was the decrease of relaxation time when increasing the fraction of weakly conducting crystalline phase[1]. To understand this phenomenon we compared the experimental TDEFS spectra with simulations based on a Comsol Multiphysics finite element simulation. The model built consists of 2500 elements allocated to well and poor conducting phases randomly. By varying the fraction of both phases, the trend of nanoscopic ion conduction can be reproduced and related to the amount of surface boundaries.