Berlin 2024 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MM: Fachverband Metall- und Materialphysik
MM 51: Focus Session: 2D Transition Metal Carbides, Nitrides and Carbonitrides II (joint session DS/MM/O)
MM 51.7: Vortrag
Donnerstag, 21. März 2024, 11:45–12:00, A 053
Isotopic Analysis of Intercalated Protons in Ti3C2Tx MXene for Electrochemical Energy Storage using in-situ FTIR Spectroscopy — •Andreas Weisser1, Mailis Lounasvuori1, Namrata Sharma1, Kyle Matthews2, Teng Zhang2, Yury Gogotsi2, and Tristan Petit1 — 1Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany — 2A. J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA
MXenes, a family of 2-dimensional transition metal carbides, are a promising candidate for use in energy storage applications due to their high capacitance. Here, we monitor the confined water and protons in Ti3C2Tx MXene electrodes during cyclic voltammetry using operando FTIR spectroscopy. Isotopic exchange with deuterium oxide is used to allow for a better understanding of the proton dynamics inside the MXene interlayers. In-situ FTIR measurements are being performed with a dedicated electrochemical cell able to measure the different vibrational modes of the confined species. The measurements are conducted in attenuated total reflectance mode (ATR).
The focus of this presentation will be on analyzing the change of the vibrational modes of water and deuterium during electrochemical cycling versus the applied potential to the working electrode. This behaviour will be discussed with regard to the intercalation of protons and the reordering of the intercalated water or deuterium. The results will be placed in the context of MXene in the role of an electrode for pseudocapacitor applications.
Keywords: in-situ; MXene; FTIR; Energy Storage