Preparation and performance of lithium ionic liquid/epoxy vinyl ester resin solid electrolyte

The electrolyte was made by dissolving Lithium Bis(trifluoromethanesulfonyl)imide (LiTFSI)which had excellent chemical stability and high conductivity in 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM-TFSI) ionic liquid. And the electrolyte was added to the epoxy vinyl ester resin to improve its performance. The results show that after adding the lithium electrolyte, the characteristic peak of ionic liquid can be detected by FTIR spectroscopy. As the electrolyte content increases, the porosity of the lithium ionic liquid/epoxy vinyl ester resin system gradually increases, as well as the gully and lamellar structure. This change is beneficial to the conduction of lithium ions, which can improve the electrical properties. At the same time, it can improve the plasticity and toughness of the resin to achieve better mechanical properties. In this experiment, when the electrolyte content is 40wt%, the system can achieve multifunction to the largest extend.