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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 43: P8: Nanoparticles and Compsite Materials

CPP 43.15: Poster

Mittwoch, 18. März 2015, 10:00–13:00, Poster A

Morphology of nanocomposite copolymer electrolytes for Li+/polymer batteries — •Konstantinos N. Raftopoulos, Majid Rasool, Ezzeldin Metwalli, Peter Müller-Buschbaum, and Christine M. Papadakis — TU München, Physik-Department, Fachgebiet Physik weicher Materie/LS Funktionelle Materialien, Garching

Long scale, effective transition to green energy and wide penetration of electric and hybrid cars, demand for batteries with high energy and power density, good mechanical stability, as well as impact and temperature resistance. Of crucial importance for the power density and the mechanical stability is the electrolyte component. Poly(ethylene oxide) (PEO) has proven itself as a reliable electrolyte, but it has two significant drawbacks: 1) Its crystallinity, while providing some stability, acts as a barrier to the mobility of the Li cations. 2) It lacks adequate dimensional stability, especially if mixed with Li+ salts. We use a block copolymer of PEO with polystyrene (PS) in order to provide dimensional stability, and we add SiO2 nanoparticles to further enhance mechanical stability and suppress crystallinity. The morphology of the system is studied by X-ray scattering diffraction covering a large q-range, corresponding to multiple length scales, in order to study microphase separation and crystallinity.