Dresden 2017 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 61: Charged Soft Matter, Ionic Liquids and Polyions II

CPP 61.1: Vortrag

Donnerstag, 23. März 2017, 15:00–15:15, ZEU 114

Impact of Momentum Conservation on the Ion Transport Mechanism in Ionic Liquids in and out of Equilibrium — •Diddo Diddens^1,2, Volker Lesch¹, Jens Smiatek³, and Andreas Heuer^1,2 — ¹Helmholtz-Institut Münster (IEK-12), Ionics in Energy Storage, Forschungszentrum Jülich GmbH, Corrensstraße 46, 48149 Münster, Germany — ²Institut für physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany — ³Institute for Computational Physics, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany

Ionic liquids (ILs) are promising electrolyte materials for batteries or supercapacitors, as the enormous number of possible cation-anion combinations allows their fine tuning to match specific demands. We use Molecular Dynamics simulations to get deeper and more systematic insights into the ion transport mechanism in ILs. In particular, we study the correlated motion of the individual ionic species, and demonstrate that momentum conservation plays a crucial role for the overall transport properties, as it constrains the net motion of all ions. Furthermore, we apply strong electric fields to investigate nonlinear contributions to the conductivity.