中性分子1,3-氮氧杂环-戊-2-酮与二(三氟甲基磺酸酰)亚胺锂形成的新型室温熔盐

在目前各种室温熔融盐(也称离子液体)体系的研究热点中，正离子多以咪唑离子、吡啶离子或其它有机季铵离子类为主，特别是烷基取代的咪唑阳离子是由咪唑环上3位N原子的孤对电子与H^ 或R^ 结合形成的，实际上是一种特殊的季铵离子，其性能较为稳定.本实验室先后制备了由具有酰胺基官能团的有机物与锂盐直接复合形成的室温熔盐．研究发现，该类物质中羰基氧呈强负电性，可

New Room-temperature Molten Salt Based on OZO of Neutral Molecule with LiTFSI

The new room-temperature molten salt was prepared based on LiTFSILiNC(SO2CF3)2] with OZO(C3H5NO2) which were not reported in literature. Its thermal and electrochemical properties were studied by differential scanning calorimetry, ac impedance spectroscopy and cyclic voltammertry respectively. The results indicated that the structure symmetry of the molecule was depressed and the extent of charges delocalization was expanded, because of introducing oxygen atom of differential electronegativity in OZO molecule. DSC analysis showed that the LiTFSI-OZO molten salt has the excellent thermal stability and its eutectic temperature is below about 223.15 K. Meanwhile, the conductivity of LiTFSI-OZO molten salt at a molar ratio of 1:4.5 is 0.75×10-3 S/cm at 298.15 K and 3.50×10-3 S/cm at 333.15 K. CV analysis showed that the electrochemical window of the sample is about 4 V.