Abstract
Ionic liquids (ILs), or molten salts, have received much attention from the areas of electrolytes of fuel cells and batteries. Their special properties such as wide electrochemical window, high conductivity, and wide operation temperature range make ILs attractive to electrolyte applications. For that purpose, new families of salts based on morpholinium organic cations combined with the bis(trifluoromethane sulfonyl)imide anions are reported in the present study. Morpholinium cation - based ILs' potential uses as electrolytes based on following some reasons: The effect of oxygen group in the cation for ionic conductivity, the advantages of synthesis and purification processes and cost reduction in production of imidazolium ionic liquids. These new pure ILs were proven to be conductive and, thermally and electrochemically stable(3 to 4.5 V). The conductivity values from 10-3 to 10-2 order are investigated in the temperature range between 20 to 50°C and they are also stable below the temperature at least 400 °C. Lithium-doped ionic liquids were also proven to be highly conductive and electrically stable. In addition, the physical and electrochemical characteristics of these Ionic liquids based on N-alkyl-N-methylmorpholinium salts have been investigated for their uses as electrolytes.
