Ionic Liquid Based Polymer Gel Electrolytes for Use with Germanium Thin Film Anodes in Lithium Ion Batteries

被引：38
|
作者：
McGrath, Louise M. [1 ]
Jones, John [2 ]
Carey, Edwin [2 ]
Rohan, James F. [1 ]
机构：
[1] Univ Coll Cork, Tyndall Natl Inst, Electrochem Mat & Energy Grp, Cork T12 R5CP, Ireland
[2] TU Dublin, Proc Analyt Technol Lab, Tallaght Campus,Blessington Rd, Dublin D24 FKT9, Ireland
来源：
CHEMISTRYOPEN | 2019年 / 8卷 / 12期
基金：
爱尔兰科学基金会;
关键词：
flexible polymers; gel electrolyte membranes; germanium anodes; ionic liquids; lithium-ion batteries; PERFORMANCE; ELECTRODES; CAPACITY; ARRAYS; SN;
D O I：
10.1002/open.201900313
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Thermally stable, flexible polymer gel electrolytes with high ionic conductivity are prepared by mixing the ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (C(4)mpyrTFSI), LiTFSI and poly(vinylidene difluoride-co-hexafluoropropylene (PVDF-HFP). FT-IR and Raman spectroscopy show that an amorphous film is obtained for high (60 %) C(4)mpyrTFSI contents. Thermogravimetric analysis (TGA) confirms that the polymer gels are stable below similar to 300 degrees C in both nitrogen and air environments. Ionic conductivity of 1.9x10(-3) S cm(-2) at room temperature is achieved for the 60 % ionic liquid loaded gel. Germanium (Ge) anodes maintain a coulombic efficiency above 95 % after 90 cycles in potential cycling tests with the 60 % C(4)mpyrTFSI polymer gel.
引用
收藏
页码：1429 / 1436
页数：8
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