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

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• 作者：Jinyun Zheng (1)
  Xiao Li (1)
  Yujian Yu (1)
  Xiaomin Zhen (1)
  Yanyao Song (1)
  Xiangming Feng (1)
  Yufen Zhao (1) (2)
  
• 关键词：Alkyl acrylates ; Gel polymer electrolytes ; Ionic conductivity ; Cross ; linking copolymerization ; In situ thermal polymerization ; Compatibility
• 刊名：Journal of Solid State Electrochemistry
• 出版年：2014
• 出版时间：July 2014
• 年：2014
• 卷：18
• 期：7
• 页码：2013-2018
• 全文大小：531 KB
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• 作者单位：Jinyun Zheng (1)
  Xiao Li (1)
  Yujian Yu (1)
  Xiaomin Zhen (1)
  Yanyao Song (1)
  Xiangming Feng (1)
  Yufen Zhao (1) (2)
  
  1. College of Chemistry and Molecular Engineering, Key Laboratory of Chemical Biology and Organic Chemistry of Henan Province, Zhengzhou University, Zhengzhou, 450001, People’s Republic of China
  2. Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, 361005, People’s Republic of China
  
• ISSN：1433-0768

文摘

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?×-0??Scm? 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.