Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 20: Poster Session I
CPP 20.41: Poster
Montag, 12. März 2018, 17:30–19:30, Poster A
Inter- and Intramolecular Interactions in an Extraordinary Conductive Polymeric Ionic Liquid — •Arthur Markus Anton, Falk Frenzel, and Friedrich Kremer — Peter Debye Institute for Soft Matter Physics, Leipzig University
Polymeric ionic liquids (PILs) combine the advantages of neat ionic liquids, such as electrochemical and thermal stability or high ion conductivity, with the benefits of polymers like well-controllable processing and structure formation conditions. Due to these advantages, PILs are of principal importance for applications like super-capacitors or battery media. Recently, it has been reported from a novel PIL which exhibits the highest dc-conductivity at temperatures below 100∘C and –contrary to the common dogma– an intensified charge transport with rising degree of polymerization [1]. In order to shed light on the origin of the material’s extraordinary performance, we examined temperature-dependent FTIR spectroscopy in combination with broadband dielectric spectroscopy. On the one hand the pure cation exhibits a lower dc-conductivity (2 · 10−9 vs. 2 · 10−7 S/cm at Tg + 50 K) than the polymeric system, on the other hand an extensive H-bond network is established, which is characterized through a distinct hysteresis in cooling-heating cycles demonstrating the stabilization of the structure through intermolecular interactions. Thus, the interplay between polymer and cations leads to the enhanced dc-conductivity which is higher than that of a separated part of the system. [1] F. Frenzel, A. M. Anton, F. Kremer et al., Macromolecules 50 (2017) 4022-4029