Dresden 2017 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 51: Poster: Charged Soft Matter, Polyelectrolytes, Ionic Liquids

CPP 51.1: Poster

Mittwoch, 22. März 2017, 18:30–21:00, P3

In situ small angle X-ray scattering investigation of solid-state polymer electrolyte for lithium-ion batteries — •Gilles Möhl1, Ezzeldin Metwalli1, Bernhard Springer1, Rune Johnsen2, and Peter Müller-Buschbaum11TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching — 2TU Denmark, Department of Energy Conversion and Storage, Roskilde, DK-4000

Many present problems regarding the safety of liquid electrolytes in lithium-ion batteries may potentially be overcome by the use of solid-state polymer electrolytes. Polystyrene-block-polyethylene oxide PS-b-PEO diblock copolymer (DBC) electrolyte have been recently investigated as a membrane for Li-ion battery. The performance of these DBC electrolytes strongly depends on its morphology, serving highly oriented PEO domains as pathways for lithium ions migration. Thus, in situ structural investigation of these Li-ion doped DBCs systems during (dis)charge cycling in an operating battery is essential. A capillary-based micro-battery cell allowing simultaneous structural and electrical evaluation has previously been reported [1]. The current in situ small-angle X-ray scattering (SAXS) study of the solid-state polymer electrolytes using a modified version of the micro-battery cell provides a deeper insight into the possible structural modification and thus, on the involved conduction mechanisms during battery operation.

[1] R.E. Johnsen, P. Norby, J. Appl. Cryst. 2013, 46, 1537.

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