Regensburg 2016 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Poster: Nanoparticles, Nanocrystals and Composites

CPP 13.2: Poster

Monday, March 7, 2016, 18:15–21:00, Poster B2

Porous titania-based hybrid films as electrodes for lithium-ion batteries — •Thomas Kaps, Ezzeldin Metwalli, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching, Germany

Porous titania films are promising candidates as electrodes for lithium-ion batteries. Large surface area of nanoporous titania films enables both, high current density and improved cycling behavior. Sol-gel templating is nowadays a widely used technique to create nanoscale porous structures. PS-b-PEO diblock copolymer is used as a structure directing agent to create foam-like mesoporous titania/silicon composite films via sol-gel method. The morphology of the porous hybrid films was probed with SEM, X-ray diffraction and GISAXS. The crystallinity of the titania films was systematically measured as a function of the silicon nanoparticle content following the calcination step at different temperatures. The titania/silicon hybrid films are tested as electrodes for lithium-ion batteries showing a unique combination of both, the high capacity and the resistance to the lithium dendrites formation.