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Recently, dinitriles (NC(CH2)nCN) and especially adiponitrile (ADN, n=4) haveattracted the attention as secure electrolyte solvents due to their chemicalstability, high boiling points, high flash points and low vapor pressure. Thegood solvating properties of ADN toward lithium salts and its highelectrochemical stability (~ 6V vs. Li/Li+) make it suitable for safer Li-ionscells without performances loss. In this study, ADN is used as a singleelectrolyte solvent with lithium bis(trimethylsulfonyl)imide (LiTFSI). Thiselectrolyte allows the use of aluminum collectors as almost no corrosion occursat voltages up to 4.2 V. Physico-chemical properties of ADN-LiTFSI electrolytesuch as salt dissolution, conductivity and viscosity were determined. Thecycling performances of batteries using Li4Ti5O12 (LTO) as anode andLiNi1/3Co1/3Mn1/3O2 (NMC) as cathode were determined. The results indicate thatLTO/NMC batteries exhibit excellent rate capabilities with a columbicefficiency close to 100%. As an example, cells were able to reach a capacity of165 mAh.g-1 at 0.1C and a capacity retention of more than 98% after 200 cyclesat 0.5C. In addition, electrodes analyses by SEM, XPS and electrochemicalimpedance spectroscopy after cycling confirming minimal surface changes of theelectrodes in the studied battery system

Adiponitrile-LiTFSI solution as alkylcarbonate free electrolyte for LTO/NMC Li-ion batteries