Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 35: Poster Session I (Scanning probe methods)
O 35.11: Poster
Dienstag, 15. März 2011, 18:30–22:00, P3
Nanoscale mapping of ion dynamics in solid electrolytes by time and space resolved electrostatic force spectroscopy — •Marvin Stiefermann1, Dirk Dietzel1, Bernhard Roling2, and Andre Schirmeisen1 — 1Institute of Physics and Center for Nanotechnology (CeNTech), University of Muenster, Germany — 2Department of Chemistry, Philipps-University Marburg, Germany
For many technological applications, such as batteries or fuel cells, materials with good ionic transport parameters are of paramount importance. Recently, the search for improved ion conducting materials has lead to nanostructured materials, where the transport properties are often determined by interaction of different phases (e.g. crystalline and amorphous) and their interfaces. In this context an improved understanding of the local nanoscale transport properties is important to further optimize the performance of such ion-conducting materials. However, classical analysis techniques, such as conductivity spectroscopy, are not suitable to directly extract nanoscale information. In this contribution we will therefore demonstrate how ionic transport properties can be mapped by Atomic Force Microscopy based electrostatic force spectroscopy [1]. By systematic temperature dependent grid spectroscopy different ion relaxation channels can be identified and correlated with the structure of a Lithium ion conducting glass ceramics (LIC-GC by Ohara cooperation). Special attention is focused on the influence of grain boundaries, which are suspected to act as a bottleneck for the macroscopic ion conduction.
[1] Schirmeisen and Roling, Chemical Monthly 140, 1103 (2009)