新型室温熔盐二(三氟甲基磺酸酰)亚胺锂-乙酰胺/乙烯脲体系的研究  

New Room-temperature Molten Salt Based on LiTFSI with Acetamide and Ethyleneurea

作　　者：陈人杰[1] 吴锋[1] 粱宏莹[2] 张存中[1] 

机构地区：[1]北京理工大学化工与环境学院 [2]国家高技术绿色材料发展中心,北京100081

出　　处：《高等学校化学学报》2004年第11期2108-2111,共4页Chemical Journal of Chinese Universities

基　　金：国家重点基础研究发展计划(批准号:2002CB211800);国家基础研究重大项目前期研究专项基金(批准号:2001CCA05000)资助

摘　　要：制备了二 (三氟甲基磺酸酰 )亚胺锂 [Li N( SO2 CF3) 2 ,Li TFSI]与乙酰胺和乙烯脲形成的新型室温熔盐 ,分析了其热学和电化学性能 .Li TFSI-乙酰胺体系的热学稳定性好 ,低共熔温度为 -62 .1 8℃ .电化学测试表明 ,Li TFSI-乙酰胺体系的电导率较高 ,n( Li TFSI)∶ n( Acetamide) =1∶ 6.5样品的室温电导率为 1 .0 8×1 0 - 3S/ cm,60℃时电导率为 5 .3 5× 1 0 - 3S/ cm;摩尔比为 1∶ 4.0样品的电化学稳定电位窗为 3 V左右 .Thermal and electrochemical properties of new room-temperature molten salt based on LiTFSI with acetamide or ethyleneurea were studied by differential scanning calorimetry, ac impedance spectroscopy and cyclic voltammertry, respectively. These molten salts appear as liquid at room temperature though they are composed of two solids. DSC analysis shows that the molten salt has a excellent thermal stability and its eutectic temperature is about -62.18 ℃. The conductivity of LiTFSI-acetamide molten salt at molar ratio 1∶6.5 is 1.08×10 -3 S/cm at 25 ℃ and 5.35×10 -3 S/cm at 60 ℃, and the electrochemical window of the sample at molar ratio 1∶4.0 is about 3 V.

关 键 词：室温熔盐 电解质 二(三氟甲基磺酸酰)亚胺锂 乙酰胺 乙烯脲 

分 类 号：O646[理学—物理化学]