Dresden 2017 – scientific programme

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O: Fachverband Oberflächenphysik

O 26: SYLI: Symposium Interfacial Challenges in Solid-State Li Ion Batteries - NMR studies

O 26.2: Talk

Tuesday, March 21, 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.