Dynamics of super concentrated acetonitrile/LiTFSI electrolytes
Acetonitrile (AN) is one of the most oxidation-tolerant organic solvents. In the particular case of lithium-ion batteries (LIB), this kind of electrolyte opens the possibility to use high voltage electrodes (∼5 V). Moreover,the electrochemical nature of organic solutions drastically improves over a certain threshold of Li-salt concentration ( >3 mol dm-3). Our previous SAXS studied have demonstrated some higher degree of ordering a the high concentration range, but also reveal an unusual long range ordering in the dilute solutions. Here we propose to address the issue of molecular transport in in this kind of electrolytes by investigating the microscopic dynamics in the liquids by quasi-elastic neutron scattering as a function of momentum transfer. The interpretation of our current data together with the data obtained from the proposed experiment will help us to further increase the fundamental understanding of the system.
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MATIC Aleksandar; L Aguilera; HANSEN Henriette Wase and KOZA Michael Marek. (2016). Dynamics of super concentrated acetonitrile/LiTFSI electrolytes. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-04-108
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