SKM 2023 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Nanostructures, Nanostructuring and Nanosized Soft Matter

CPP 37.2: Talk

Wednesday, March 29, 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. Roth^3,4, Thomas F. Fässler², and Peter Müller-Buschbaum^1,5 — 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 K₁₂Si_xGe_17−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.