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O: Fachverband Oberflächenphysik
O 84: Poster Session - Solid-Liquid Interfaces: Reactions and Electrochemisty
O 84.12: Poster
Mittwoch, 18. März 2020, 18:15–20:00, P2/EG
Magnesium intercalation in layered MoS2 - Fast kinetics by Mg2+ complexation with DME ligands and MoS2 phase transition upon intercalation — Zhenyou Li1,2, Xiaoke Mu2, Zhirong Zhao-Karger1,2, •Thomas Diemant3, R. Jürgen Behm1,3, Christian Kübel1,2,4, and Max Fichtner1,2 — 1Helmholtz Institute Ulm (HIU), Helmholtzstr. 11, D-89081 Ulm, Germany — 2Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany — 3Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, D-89081 Ulm, Germany — 4Karlsruhe Nano Micro Facility, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
Rechargeable magnesium batteries are one of the most promising candidates for next-generation battery technology. Despite recent significant progress, it remains a challenge to overcome the sluggish kinetics caused by the strong interaction between double charged Mg2+ ions and the intercalation host. Herein, we report that fast intercalation kinetics in layered MoS2 can be achieved when using solvated Mg(DME)x2+. The high charge density of Mg2+ is mitigated by DME complexation, reducing the trapping force of the cathode lattice to the Mg2+ cations. We also studied the intercalation process by various spectroscopic and microscopic methods and found a phase transition of the MoS2 host from the semi-conductive 2H to the metallic 1T phase upon intercalation.