Hybrid gel polymer electrolyte for high-safety lithium-sulfur batteries

被引：45
|
作者：
Kim, Jae-Kwang [1 ]
机构：
[1] Cheongju Univ, Dept Solar & Energy Engn, Cheongju 360764, Chungbuk, South Korea
来源：
MATERIALS LETTERS | 2017年 / 187卷
关键词：
Ionic liquid; Polymer matrix; Sulfur dissolution; Lithium-sulfur battery; IONIC LIQUID ELECTROLYTE; ELECTROCHEMICAL PROPERTIES; MEMBRANE; ELECTROSPUN; PERFORMANCE; CATHODE;
D O I：
10.1016/j.matlet.2016.10.069
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A hybrid nanofiber PVDF-HFP polymer matrix with dispersed SiO2 nanoparticles was prepared by electrospinning, and 1 M lithium bis(trifluoromethysulfonyl)imide (LiTFSI)/1-propyl-3-methylimidazolium bis(trifluoromethysulfonyl)imide (PMImTFSI) was incorporated in the hybrid polymer matrix to produce a polymer gel electrolyte for lithium-sulfur batteries. The PMImTFSI-based hybrid gel polymer electrolyte (ILGPE) reduced the concentration of Li+-coordinated TFSI, and the incorporation of PMImTFSI increased the alpha-phase content of PVDF-HFP, reducing polymer crystallinity. In addition, ILGPE showed high ionic conductivity, high oxidation potential ( > 5.0 V vs. Li/Li+), and low flammability. The Li/S battery utilizing ILGPE showed a high initial discharge capacity of 1029 mAh g(-1) and maintained a stable capacity of 885 mAh g(-1) after 30 cycles at a current rate of 0.1 C.
引用
收藏
页码：40 / 43
页数：4
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