期刊
IONICS
卷 21, 期 3, 页码 895-900出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-015-1370-x
关键词
Solid polymer electrolyte; Poly(ethylene carbonate); Ionic liquid; Lithium battery
资金
- Program for Leading Graduate Schools of Tokyo University of Agriculture and Technology
A novel polymer electrolyte membrane comprising poly(ethylene carbonate) (PEC), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt, and N-n-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (Pyr(14)TFSI) ionic liquid is prepared by a solvent-free procedure, combining annealing and hot-pressing. The electrochemical properties of the electrolyte are investigated in terms of ionic conductivity, Li transference number (t (Li+)), and electrochemical stability by a combined study involving electrochemical impedance spectroscopy (EIS), chronoamperometry, and voltammetry. The thermal characteristics are assessed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The results reveal an ionic conductivity of a PEC-Pyr(14)TFSI-LiTFSI electrolyte of the order of 10(-5) S cm(-1) at 80 A degrees C and t (Li+) as high as 0.66 with the intrinsic amorphous nature of the PEC matrix. Furthermore, a Li polymer cell coupling LiFePO4 cathode and the electrolyte is assembled and galvanostatically cycled. The result of this charge-discharge test demonstrates a 3.5-V battery which can be used at 80 A degrees C and a current rate of C/20, delivering a reversible capacity of the order of 150 mAh g(-1).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据