Dresden 2017 – wissenschaftliches Programm
MM 26.2: Vortrag
Dienstag, 21. März 2017, 10:30–10:45, IFW A
Solid-state MAS and in-situ NMR spectroscopy for studying battery systems — Wolfram Münchgesang1, Viktor Koroteev2, Tatiana Zakharchenko3, Daniil M. Itkis4, Dirk C. Meyer1, and •Anastasia Vyalikh1 — 1Institut für Experimentelle Physik, TU Bergakademie Freiberg, Freiberg, Germany — 2Nikolaev Institute of Inorganic Chemistry SB RAN, Novosibirsk, Russia — 3Department of Material Science, Moscow State University, Moscow, Russia — 4Department of Chemistry, Moscow State University, Moscow, Russia
Current research efforts in the field of energy storage are directed towards improving cost and performance of lithium ion batteries as well as evaluating post lithium ion concepts. Deep understanding of electrochemical processes requires quantitative information on a molecular level, on the one hand, and with temporal resolution, on the other hand. In our studies we apply ex-situ analysis using high-resolution magic angle spinning (MAS) NMR in combination with in-situ NMR, in order to characterize the electrochemical intermediates and reaction products as well as to monitor the formation of solid electrolyte interface (SEI) and surface microstructures in operating cells. The NMR results demonstrate the structural transformations in lithium ion batteries based on vanadia composite and 13C-isotop enriched carbon electrodes.