Preparation and performance of a non-ionic plastic crystal electrolyte with the addition of polymer for lithium ion batteries

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• 作者：Qiujun Wang ; Huanhuan Fan ; Li-Zhen Fan ; Qiao Shi
• 关键词：Plastic crystal ; Polymer electrolyte ; Thermal polymerization ; Lithium ion batteries
• 刊名：Electrochimica Acta
• 出版年：30 December, 2013
• 年：2013
• 卷：114
• 期：Complete
• 页码：720-725
• 全文大小：854 K

文摘

A soft matter solid electrolyte was prepared by polymerizing a monomer trimethylolpropane trimethylacrylate (TMPTMA) using in situ thermal polymerization into a non-ionic plastic crystal electrolyte, which is consisted of 5 mol% lithium bis-trifluoromethanesulfonimide dissolved in succinonitrile (SN). X-ray diffraction, differential scanning calorimetry and conductivity measurements are used to investigate the structural and electrochemical performance of the polymer electrolyte films. It exhibits high ionic conductivities, wide electrochemical window and excellent mechanical strength. The solid electrolyte with 7.5 wt% TMPTMA displays a high initial discharge capacity of 160.3 mA h g^鈭? at 0.1 C when combined with a LiFePO₄ cathode and excellent capacity retention. With their beneficial properties, the polymer electrolytes are considered to have significant potential applications for lithium ion batteries.