高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (2): 305.

• 论文 • 上一篇    下一篇

以二(三氟甲基磺酰)亚胺锂为基底的室温熔融盐电解质热学及电化学性质的比较研究

梁宏莹1,2, 吴锋1, 陈立泉2, 黄学杰2   

  1. 1. 北京理工大学化工与材料学院, 北京 100081;
    2. 中国科学院物理研究所固态离子学实验室, 北京 100080
  • 收稿日期:2002-03-26 出版日期:2003-02-24 发布日期:2003-02-24
  • 通讯作者: 吴锋(1951年出生),男,教授,博士生导师,主要从事动力电池及绿色能源材料的研究.E-mail:wufeng863@sina.com E-mail:wufeng863@sina.com
  • 基金资助:

    国家科技部基础研究重大项目前期研究项目(批准号:2001CCA05000)资助

Comparative Studies on Thermal and Electrochemical Properties of Room-temperature Molten Salt Electrolytes Based on LiTFSI with Urea and Its Derivatives

LIANG Hong-Ying1,2, WU Feng1, CHEN Li-Quan2, HUANG Xue-Jie2   

  1. 1. School of Chemical Engineering and Materials Science, Beijing Institute of Technology, Beijing 100081, China;
    2. Lab for Solid State Ionics, Institute of Physics, Chinese Academy of Sciences, Beijing 100081, China
  • Received:2002-03-26 Online:2003-02-24 Published:2003-02-24

PDF (PC)

被引次数

34

摘要： 制备了一系列二(三氟甲基磺酰)亚胺锂[LiN(SO2CF3)2,LiTFSI]与尿素及其衍生物形成的新型室温熔融盐电解质,并对其热学性质及电导率进行了比较研究.受甲基取代基的影响,LiTFSI-甲基脲体系的共熔温度最低,为-38℃.LiTFSI-尿素体系的室温电导率最高,为1.74×10-4S/cm,50℃电导率为1.24×10-3S/cm.

关键词: 室温熔融盐电解质, 热学性质, 离子电导率, 二(三氟甲基磺酰)亚胺锂, 尿素, 甲基脲

Abstract: Thermal and electrochemical properties of new room-temperature molten salt electrolytes based on LiTFSI with urea and its derivatives have been studied. These electrolytes appear as liquid at room temperature though they are composed of two solids. DSC analysis shows that the eutectic temperature of LiTFSI and methylurea is about-38 ℃, lower than those of LiTFSI-urea and LiTFSI-1,3-dimethylurea. The conduction behavior of these electrolytes has been evaluated by AC impedance spectroscopy. With increasing numbers of methyl of urea, the conductivities of these room-temperature molten salt electrolytes decrease accordingly. The conductivity of LiTFSI/urea eutectic compound is 1.74×10-4 S/cm at 25 ℃ and 1.24×10-3 S/cm at 50 ℃.

Key words: Room-temperature molten salt electrolyte, Thermal properties, Ionic conductivity, LiTFSI, Urea, Methylurea

中图分类号: 

TrendMD: