The effect of Al2O3 nano-filler on ion interactions in ionic liquid based electrolytes using vibrational spectroscopy

Abstract

Ionic liquid (IL) based electrolytes are considered as safer electrolytes for future rechargeable batteries due to their non-volatility and non-flammability. To make them as electrolytes, suitable salts should be added. Lithium salts doped ILs have been studied up to a great extent, however, studies on incorporation of other salts based on sodium (Na) or magnesium (Mg) into ILs are lacking. Since ion transport properties such as ionic conductivity of these IL-salt mixtures depends on the molecular structure and interactions, observations of spectroscopic studies may help to develop these materials. In this work, ionic interactions of sodium triflate (NaTf) and magnesium triflate (MgTf) doped IL system based on 1-butyl-3-methylimidazolium trifluromethanesulfonate (BMIMTf) and alumina (Al2O3) nano-filler are explored by FTIR spectroscopy.