高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (11): 2108-2111.

• 研究论文 • 上一篇    下一篇

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

陈人杰1,2, 吴锋1,2, 粱宏莹2, 张存中1,2   

  1. 1. 北京理工大学化工与环境学院, 北京100081;
    2. 国家高技术绿色材料发展中心, 北京100081
  • 收稿日期:2003-09-08 出版日期:2004-11-24 发布日期:2004-11-24
  • 基金资助:

    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

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

CHEN Ren-Jie1,2, WU Feng1,2, LIANG Hong-Ying2, ZHANG Cun-Zhong1,2   

  1. 1. School of Chemical Engineering and Environment Science, Beijing Institute of Technology, Beijing 100081, China;
    2. National Development Center of High Technology Green Materials, Beijing 100081, China
  • Received:2003-09-08 Online:2004-11-24 Published:2004-11-24

摘要: 制备了二(三氟甲基磺酸酰)亚胺锂[LiN(SO2CF3)2,LiTFSI]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.LiTFSI-乙酰胺体系的热学稳定性好,低共熔温度为-62.18℃.电化学测试表明,LiTFSI-乙酰胺体系的电导率较高,n(LiTFSI):n(Acetamide)=1:6.5样品的室温电导率为1.08×10-3S/cm,60℃时电导率为5.35×10-3S/cm;摩尔比为1:4.0样品的电化学稳定电位窗为3V左右.

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

Abstract: 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.

Key words: Room-temperature molten salt, Electrolyte, LiTFSI, Acetamide, Ethyleneurea

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