Structural Characterization by NMR Procedure of C4C1Pyrr TFSI Doped with Lithium TFSI Salt in Liquid and Gel States

Abstract

Ionic Liquids represent a viable option as electrolytes as many electrochemical applications such as energy storage devices due to their high ionic conductivity and wide electrochemical window. However, liquid electrolytes present important problems of safety and performance, and encapsulation in solid matrix can be a good solution to improve it. In this work, changes on the structure of the mixtures of ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and Lithium bis(trifluoromethylsulfonyl)imide against the concentration of the salt (0, 0.1 and 1.5 molal), and the effect of nanoconfinement through gelation process were studied using NMR technique.