Regensburg 2016 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 26: Poster: Charged Soft Matter, Polyelectrolytes, Ionic Liquids

CPP 26.2: Poster

Dienstag, 8. März 2016, 18:15–21:00, Poster B2

Self-assembled hybrid materials as a membrane for lithium-ion batteries — •Simon Schaper, Ezzeldin Metwalli, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching, Germany

Lithium-ion batteries are the state of the art solution powering portable electronic devices, electrically driven vehicles and storing homemade solar energy. The morphology and conductivity of a high molecular weight polystyrene-block-polyethylene oxide (PS-b-PEO) block copolymer containing lithium salt and titania nanoparticles were investigated at different temperatures. The crystallization of the PEO block was highly suppressed at a certain Li-salt doping level as well as upon increasing titania concentration. SAXS measurements indicate a morphological transition from lamella to cylinders and spheres with subsequent solid-state hybrid membrane amorphization. The conductivity behavior of the hybrid membrane is correlated to the membrane structure. A proper amount of titania nanoparticles suppresses also the dendrite growth of the battery electrodes and therefor enhances the cycling stability of the cell.