Cross-linking copolymers of acrylates’ gel electrolytes with high conductivity for lithium-ion batteries

被引:0
作者
Jinyun Zheng
Xiao Li
Yujian Yu
Xiaomin Zhen
Yanyao Song
Xiangming Feng
Yufen Zhao
机构
[1] Zhengzhou University,College of Chemistry and Molecular Engineering, Key Laboratory of Chemical Biology and Organic Chemistry of Henan Province
[2] Xiamen University,Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province
来源
Journal of Solid State Electrochemistry | 2014年 / 18卷
关键词
Alkyl acrylates; Gel polymer electrolytes; Ionic conductivity; Cross-linking copolymerization; In situ thermal polymerization; Compatibility;
D O I
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中图分类号
学科分类号
摘要
The cross-linking gel copolymer electrolytes containing alkyl acrylates, triethylene glycol dimethacrylate, and liquid electrolyte were prepared by in situ thermal polymerization. The gel polymer electrolytes containing 15 wt% polymer content and 85 wt% liquid electrolyte content with sufficient mechanical strength showed the high ionic conductivity around 5 × 10−3 Scm−1 at room temperature. The gel electrolytes containing different polymer matrices were prepared, and their physical observation and conductivity were discussed carefully. The cross-linking copolymer gel electrolytes of alkyl acrylates with other monomers were designed and synthesized. The results showed that copolymerization can improve the mechanical properties and ionic conductivities of the gel electrolytes. The polymer matrices of gels had excellent thermal stability and electrochemical stability. The scanning electron microscope analysis showed the gel electrolyte was the homogeneous structure, and the cross-linking polymer host was the porous three-dimensional network structure, which demonstrated the high conductivity of the gel electrolytes. The gel polymer Li-ion battery was prepared by this in situ thermal polymerization. The cell exhibited high charge-discharge efficiency at 0.1 C. The results of LiFePO4-PEA-Li cell and graphite-PEA-Li cell showed that gel polymer electrolytes have good compatibility with the battery electrodes materials.
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页码:2013 / 2018
页数:5
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