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将具备优良化学稳定性及高电导率的双三氟甲烷磺酰亚胺锂(LiTFSI)溶于1-乙基-3-甲基咪唑双三氟甲磺酰亚胺盐(EMIM-TFSI)离子液体中制成LiTFSI-EMIM-TFSI电解液,加入到环氧乙烯基酯树脂(VER)中对其进行改性。结果表明,添加了上述电解液后的锂离子电解液/环氧乙烯基酯树脂(LiTFSI-EMIM-TFSI/VER)体系可通过IR光谱检测到离子液体的特征吸收峰。随着电解液含量的增加,LiTFSI-EMIM-TFSI/VER体系的孔隙率逐渐增大,沟壑与片层结构逐渐增多。这一变化有利于锂离子的传导,提高体系的电性能,同时可在一定程度上改善树脂的塑性和韧性,提高LiTFSI-EMIM-TFSI/VER体系的力学性能。在本实验中,当电解液含量为40wt%时,LiTFSI-EMIM-TFSI/VER体系多功能性得以最好地实现。
Lithium bistrifluoromethanesulfonimide (LiTFSI) with excellent chemical stability and high conductivity was dissolved in 1-ethyl-3-methylimidazolium bistrifluoromethanesulfonimide (EMIM-TFSI) ion LiTFSI-EMIM-TFSI electrolyte was prepared in liquid and modified into epoxy vinyl ester resin (VER). The results show that the LiTFSI-EMIM-TFSI / VER system can detect the characteristic absorption peak of ionic liquid by IR spectroscopy after adding the above electrolyte. With the increase of electrolyte content, the porosity of LiTFSI-EMIM-TFSI / VER system gradually increases, and the gully and lamellar structure gradually increase. This change is conducive to the conduction of lithium ions to improve the electrical properties of the system, while improving the plasticity and toughness of the resin to a certain extent, and improve the mechanical properties of LiTFSI-EMIM-TFSI / VER system. In this experiment, the versatility of the LiTFSI-EMIM-TFSI / VER system was best achieved when the electrolyte content was 40 wt%.