Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 32: Poster Session II
CPP 32.3: Poster
Donnerstag, 20. März 2025, 09:30–12:00, P3
Microscopic Insights into NaTFSI Based Thermoelectric Polymer Electrolyte by Raman Spectroscopy — •Julian-Steven Schilling1 and Jens Pflaum1,2 — 1University of Wuerzburg, 97074 Würzburg — 2Center for Applied Energy Research (CAE Bayern e.V.), 97074 Würzburg
The variety of chemical components, solution-based processability, and intrinsically low thermal conductivity have positioned polymers as leading materials in the field of organic thermoelectrics. Since materials facilitating ionic transport provide significantly higher thermoelectric voltages compared to electronic ones, we have analyzed the thermoelectric transport properties of a methacrylate-based solid polymer electrolyte. This study pursued our previous work [1] on this solution processed electrolyte by revealing new insights into the interaction of the conducting NaTFSI salt and the polymer backbone on microscopic length scales. By means of Raman spectroscopy, we use e.g. the S-C stretching modes and their salt concentration dependency to identify free TSFI Ions inside the polymer matrix which are responsible for the thermoelectric properties. In addition, we highlight the concentration dependent characteristics of the liquid versus solid electrolyte phase as well as the impact of the photoinitiator used for UV-curing on the electrolyte behaviour. [1] arxiv:2403.09340
Keywords: thermoelectric; polymer electrolyte; solid-state electrolyte; Raman spectroscopy; conducting salt