SKM 2023 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 37: Nanostructures, Nanostructuring and Nanosized Soft Matter
CPP 37.2: Vortrag
Mittwoch, 29. März 2023, 15:15–15:30, MER 02
Toluene-mediated morphology transition of amphiphilic diblock copolymer templated Si/Ge/C thin films — •Christian L. Weindl1, Kexin Wu1, Christian E. Fajman2, Constantin Harder3, Benedikt Sochor3, Matthias Schwartzkopf3, Stephan V. Roth3,4, Thomas F. Fässler2, and Peter Müller-Buschbaum1,5 — 1TUM School of Natural Sciences, Chair of Functional Materials, 85748 Garching — 2TUM School of Natural Sciences, Chair of Inorganic Chemistry with Focus on Novel Materials, 85748 Garching — 3DESY, 22607 Hamburg — 4Royal Institute of Technology KTH, 100 44 Stockholm — 5MLZ, TUM, 85748 Garching
The latest research has revealed promising results for silicon (Si) and germanium (Ge) as anode materials for lithium-ion batteries. These two group 14 semiconductors are considered auspicious additives in graphite anodes due to their high specific capacity (Si) and electron mobility (Ge). This study aims to synthesize a mesoporous Si/Ge/C structure over a wet chemical sol-gel approach with the structure-directing amphiphilic diblock copolymer PS-b-PEO and the Zintl cluster K12SixGe17−x. Furthermore, we added toluene as an additive to further induce the microphase separation. Real-space data as SEM will be discussed with the reciprocal-space analysis methods as grazing-incidence small/wide-angle x-ray scattering (GISAXS/GIWAXS). Finally, as an application, we will show the performance of these novel films as Li-ion battery anodes.