Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 64: Nanostructures, Nanostructuring and Nanosized Soft Matter II
CPP 64.12: Vortrag
Donnerstag, 15. März 2018, 12:30–12:45, PC 203
13C isotope enriched graphitic material for operando NMR studies of processes in electrochemical cells — •Anastasia Vyalikh1, Victor Koroteev2, Wolfram Münchgesang1, Lyubov' Bulusheva2, Alexander Okotrub2, and Dirk C. Meyer1 — 1TU Bergakademie Freiberg, Freiberg, Germany — 2Nikolaev Institute of Inorganic Chemistry, Novosibirsk, Russia
We provide a multi-scale characterization of a 13C-enriched fine-grained graphitic material and explore two different ways of its modification through a high-temperature high pressure annealing and a room-temperature chemical treatment. It has been found that such modifications result in structural and textural changes caused by carbon layer arrangement and carbon hybridization state, that can significantly affect the behavior in various applications, including batteries. We have shown that a high degree of 13C isotope enrichment, as well as good long-term performances in Li-ion batteries, and, in particular, an improved NMR spectral resolution in the bromine-treated sample provide the materials studied in the present work to be suitable candidates for 13C NMR study of processes in electrochemical cells.