Dresden 2017 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 22: Poster session I
MM 22.33: Poster
Montag, 20. März 2017, 19:00–20:00, P4
Electrochemical Strain Microscopy for mapping ionic conductivity with high spatial resolution — •Nino Schön1,2, Svenja Benning1,2, Roland Schierholz1, and Florian Hausen1,2 — 1Forschungszentrum Jülich, Institute of Energy and Climate Research, IEK-9, 52425 Jülich, Germany — 2RWTH Aachen University, Institute of Physical Chemistry, 52074 Aachen, Germany
Devices for energy storage play an important role in our daily life but also in tackling fundamental problems towards a sustainable energy landscape. Currently challenging is the ability to store surplus energy and release it on demand. All-solid-state Lithium-Ion-Batteries (ASSLiB) present an attractive solution with high potential for further development. To realize improved solid state batteries, it is of utmost importance to understand the electrochemical and charge transport properties of promising energy materials at a relevant scale, especially the correlation between microstructure and local Li-Ion conductivity.
Within this contribution we introduce Electrochemical Strain Microscopy (ESM) as a method to investigate ionic conductivities with very high spatial resolution. ESM is based on Atomic Force Microscopy, a powerful tool to get insights into the surface characteristics at the nanometer scale. The Underlying principle of ESM is the link between the Li-Ion concentration and the molar volume. Ionic conductivity can be detected indirectly by applying a localized voltage pulse and inducing Li-Ion movement the resulting material strain can be quantified with subnanometer resolution. Hence, ESM allows for direct correlations between ionic conductivity and microstructure.