UV-cured polymer electrolytes encompassing hydrophobic room temperature ionic liquid for lithium batteries

被引:82
作者
Gerbaldi, C. [1 ]
Nair, J. R. [1 ]
Ahmad, Shahzada [2 ]
Meligrana, G. [1 ]
Bongiovanni, R. [1 ]
Bodoardo, S. [1 ]
Penazzi, N. [1 ]
机构
[1] Politecn Torino, Dept Mat Sci & Chem Engn, I-10129 Turin, Italy
[2] Natl Phys Lab, Elect Mat Div, New Delhi 110012, India
关键词
UV-curing; Dimethacrylate; Room temperature ionic liquid; Thermal stability; Ionic conductivity; Lithium cell; PERFORMANCE;
D O I
10.1016/j.jpowsour.2009.09.047
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We demonstrate herewith the application of in Situ one-shot free radical photo-polymerisation (UV-curing) process to incorporate room temperature ionic liquids (RTILs) into polymer membranes which can be used as electrolytes for lithium-based batteries. The reactive formulation for the preparation of the polymer membranes was based on a dimethacrylic oligomer (BEMA) The polymer electrolyte membranes were synthesized by UV radiating a mixture of BEMA and a proper radical photo-initiator with different compositions of 1-ethyl-3-methylimidazolium bis(perfluoroethylsulfonyl)imide [EMIPFSI] and, additionally, LiTFSI as lithium source Stable and flexible polymer films with good mechanical integrity can easily be produced with varying the EMIPFSI content by using this method. Remarkable values of ionic conductivity were obtained even at ambient temperature Galvanostatic charge/discharge cyclability tests were performed on the polymer electrolyte membranes by constructing a cell using LiFePO4 as cathode and Li metal as anode. The preliminary results are interesting. exhibiting good reversibility and cyclability. (C) 2009 Elsevier B.V. All rights reserved
引用
收藏
页码:1706 / 1713
页数:8
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