高等学校化学学报

高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (2): 330.

• 研究论文 • 上一篇    下一篇

PEO-LiClO4-ZSM-5复合聚合物电解质——ZSM-5对锂离子选择通过的影响

席靖宇, 马晓梅, 崔孟忠, 唐小真   

  1. 上海交通大学化学化工学院, 上海 200240
  • 收稿日期:2004-01-15 出版日期:2005-02-10 发布日期:2005-02-10
  • 通讯作者: 唐小真(1947年出生),男,教授,博士生导师,主要从事多相多组分聚合物材料的研究.E-mail:xtang@sjtu.edu.cn E-mail:xtang@sjtu.edu.cn
  • 基金资助:

    上海市重点科技攻关项目(批准号:02dz11002)资助

PEO-LiClO4-ZSM-5 Composite Polymer Electrolyte——Effect of ZSM-5 on the Selective Transference of Lithium Ion

XI Jing-Yu, MA Xiao-Mei, CUI Meng-Zhong, TANG Xiao-Zhen   

  1. School of Chemistry and Chemical Technology, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2004-01-15 Online:2005-02-10 Published:2005-02-10

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摘要： 通过溶液浇铸法制得了一系列以不同分子筛和蒙脱土为填料的PEO基复合聚合物电解质,利用交流阻抗-稳态电流方法研究了填料对复合聚合物电解质锂离子迁移数(TLi+)的影响.实验结果表明,所有填料都有利于同时提高复合聚合物电解质的TLi+和离子电导率,但以Li-ZSM-5为填料时TLi+最高,这是因为ZSM-5的特殊二维孔道结构有利于阳离子Li+的进入,而排斥阴离子ClO4-的通过.较高的TLi+和室温离子电导率说明PEO-LiClO4-ZSM-5有可能作为全固态锂离子聚合物电池的电解质材料.

关键词: 复合聚合物电解质, 锂离子迁移数, 离子电导率, 分子筛, ZSM-5

Abstract: A series of polyethylene oxide(PEO)-based composite polymer electrolytes(CPE), with different kinds of molecular sieves and montmorillonite as the filler, were obtained by solvent casting method. The effects of the filler on the lithium-ion transference number(TLi+) of the CPE were investigated by the method of AC impedance coupled with steady-state current techniques. The experiment results showed that the addition of all kinds of fillers could improve TLi+ and enhance the ionic conductivity of PEO-LiClO4 at the same time. However, the highest TLi+ of 0.353 was recorded by using Li-ZSM-5 as the filler. The special two-dimension frameworks of the ZSM-5, which might let the cation Li+ to pass through and prevent the passing of the anion ClO-4, could be used to explain the enhancement of TLi+ induced by Li-ZSM-5. High TLi+ and RT ionic conductivity ensured the use of PEO-LiClO4-ZSM-5 as the electrolyte materials for all solid-state rechargeable lithium ion batteries.

Key words: Composite polymer electrolyte, Lithium-ion transference number, Ionic conductivity, Molecular sieves, ZSM-5

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