Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 54: Poster Session 3

CPP 54.34: Poster

Donnerstag, 3. April 2014, 15:00–19:00, P2

Structure and Conductivity of Liquid Crystals having Carbonate Segments — •Andreas Eisele¹, Konstantinos Kyriakos², Margarita Dyakonova², Christine M. Papadakis², and Bernhard Rieger¹ — ¹TU München, Department Chemie, Garching — ²TU München, Physik-Department, Garching

The development of lithium ion batteries with higher capacity and a sufficient safety performance is essential for electric vehicles. It is essential to develop non-volatile and nonflammable electrolytes with good ion conductivity. A new approach is the use of liquid crystalline compounds. Liquid crystals which have ion conducting segments can transport ions efficiently as segregation leads to the formation of nanoscale ion pathways.

We investigated liquid crystalline molecules with a perfluorinated aromatic ring as mesogenic core and a cyclic carbonate as ion conductive moiety. Small-angle X-ray scattering revealed that they form the smectic phase. Spontaneous macroscopic alignment was observed. The influence of lithium salt on the alignment of the molecules and the layer spacing was investigated. The findings were compared with anisotropic conductivity measurements in the smectic as well in the isotropic phase to get new insights into the conductivity mechanism.