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O: Fachverband Oberflächenphysik
O 18: Solid-Liquid Interfaces I: Structure and Spectroscopy
O 18.6: Talk
Monday, March 18, 2024, 16:15–16:30, H 1012
Initial Stages of Alkali Metal Deposition on Au(111) from [MPPip][TFSI] — •Maren-Kathrin Heubach1, Fabian M. Schuett1, Areeg Abdelrahman1, Ludwig A. Kibler1, Toni Moser2, Julia Kunze-Liebhäuser2, and Timo Jacob1,3,4 — 1Institute of Electrochemistry, Ulm University, Ulm, Germany — 2Institute of Physical Chemistry, University of Innsbruck, Innrain 52c, Innsbruck, 6020 Austria — 3Helmholtz-Institute-Ulm (HIU), Ulm, Germany — 4Karlsruhe Institute of Technology, Karlsruhe, Germany
The cycling stability of alkali metal batteries using a metal anode is often limited by dendritic growth.1,2 Hereby, the initial stages of metal deposition and dissolution play a key role since they have a huge impact on the macroscopic morphology of the deposits.3
In this study, the initial stages of sodium and lithium deposition on Au(111) from the ionic liquid N-methyl-N-propylpiperidinium bis(trifluoromethane-sulfonyl)imide ([MPPip][TFSI]) are investigated by cyclic voltammetry and in situ scanning tunnelling microscopy. The deposition of both alkali metals starts at underpotentials of approximately 1 V with island formation and the following underpotential deposition includes more than two monolayers.4
[1] A. Jana, R. E. García, Nano Energy 2017, 41, 552–565. [2] B. Lee, E. Paek, D. Mitlin, S. W. Lee, Chemical Reviews 2019, 119, 5416–5460. [3] C. A. Berger, M. U. Ceblin, T. Jacob, ChemElectroChem 2017 4, 261–265. [4] M.-K. Heubach, F. M. Schuett, L. A. Kibler, A. Abdelrahman, T. Jacob, ChemElectroChem 2022, 9, e202200722.