Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 3: Scanning Probe Techniques: Method Development I

O 3.4: Vortrag

Montag, 20. März 2017, 11:15–11:30, TRE Phy

Electrochemistry at the Nanoscale: Theoretical and Practical Aspects of Electrochemical Strain Microscopy — •Valon Lushta1, Stephan Bradler2, Bernhard Roling2, and Andre Schirmeisen11Institute of Applied Physics, Justus-Liebig-University Gießen, D-35392 Gießen, Germany — 2Department of Chemistry,Philipps-University Marburg, D-35032 Marburg, Germany

The implementation of renewable energy as the main energy source is only possible with reliable energy storage techniques. Current batteries lose a significant amount of storing capacity after a few hundreds of charge-discharge cycles.

Mechanical strain is one of the main causes for degradation processes in solid-state batteries. Electrochemical Strain Microscopy (ESM) is a powerful tool to measure strain at the nanoscale [1].

Recent studies have shown that quantitative measurements of the local strain require a deeper understanding of the ESM signal formation [2]. Here, we present a theoretical model for the cantilever motion, and we use this model to evaluate experimental results. We show that quantitative ESM requires corrections of the signals with respect to the local contact stiffness and to frequency tracking errors [3].

[1] S. Kalinin et al., Materials Today 14 (2011) 548

[2] S. Jesse et al., J. Phys. D: Appl. Phys. 44 (2011) 464006

[3] S. Bradler, A. Schirmeisen, B. Roling, MJ. Appl. Phys. (2016)

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