Physical and Electrochemical Characterization of Quaternary Ammonium Ionic Liquids and Polar Solvent Mixture as Electrolyte for Lithium Batteries
In our previous report, the incorporation of 20 wt% EC has no positive effect on the pure IL dissociation, but decreases the viscosity as well as improves the electrochemical window stability [8, 9]. Thus, the IC-ILs mixture constitutes an interesting alternative and safe solvents for application in lithium batteries. To further explore the potential application of ammonium quaternary (QA) based ILs, we investigate here the cycling behavior and evolution of impedance characteristics of lithium cell (Li metal//ILs + 0.25M LiTFSI or ILs-EC + 0.25M LiTFSI //LiMn2O4, LiCoO2) using Swagelok prototype. The Li+insertion/desinsertion into electrode materials has also studied by cyclic voltammetry in lithium electrolyte based ILs.
Keywords:Electrolyte, ionic liquids, lithium battery
Acknowledgement: This work was supported by Vietnam National Foundation for Science and Technology Development (NAFOSTED) through Project Fund granted of 104.03-2012.46.
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