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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (22): 2624-2628. 上一篇    下一篇

研究论文

含硅氢键聚二硅氧烷/聚醚共混聚合物电解质 I. 离子电导率研究

崔孟忠*,a,b，李竹云c，张 洁a，冯圣玉*,a   

  1. (a山东大学化学化工学院 济南 250100) (b烟台大学化工材料研究所 烟台 264005) (c烟台大学应用化学系 烟台 264005)
  • 投稿日期:2009-02-01 修回日期:2009-04-28 发布日期:2009-07-13
  • 通讯作者: 崔孟忠 E-mail:mzcui@ytu.edu.cn

Composite Polymer Electrolyte of Polysilaether Containing Moiety Si—H Bonds in the Side Chain and Polyethylene Oxide I. Ionic Conductivity Study

Cui, Mengzhong*,a,b，Li, Zhuyunc，Zhang, Jiea，Feng, Shengyu*,a   

  1. (a School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100) (b Institute of Chemical Engineering and Materials, Yantai University, Yantai 264005) (c Department of Applied Chemistry, Yantai University, Yantai 264005)
  • Received:2009-02-01 Revised:2009-04-28 Published:2009-07-13
  • Contact: Cui Meng-zhong E-mail:mzcui@ytu.edu.cn

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首次采用新型有机硅聚合物——侧链含一半硅氢键的羟基封端聚二硅氧烷(PSEMH)与聚氧乙烯醚(PEO)作为基质, 通过溶液浇铸法制备了PEO-PSEMH-LiClO4全固态共混聚合物电解质膜. 交流阻抗谱实验测定结果表明PSEMH与PEO共混作为聚合物电解质的基质可以显著提高共混聚合物电解质的离子电导率. PSEMH含量为25%, O/Li＋为12∶1时, 共混聚合物电解质具有最大离子电导率2.7×10－5 S•cm－1 (28 ℃). PSEMH的引入一方面可以显著地抑制PEO的结晶性能, 另一方面PSEMH分子链节中的二硅醚氧原子与Li＋间具有配位作用, 且参与了共混聚合物电解质锂离子迁移运动.

关键词: 共混聚合物电解质, PSEMH, PEO, 离子电导率

Composite polymer electrolyte was prepared by a solvent casting method with a novel class of silicone polymer, polysilaether containing moiety Si—H bonds in the side chain (PSEMH), polyethylene oxide (PEO) and LiClO4 for the first time. The effects of PSEMH on the ionic conductivity of the PEO-PSEMH-LiClO4 were studied by an electrochemical alternating current (AC) impedance spectroscopy method before and after crosslinking of PSEMH. The experiment results showed that the addition of PSEMH could improve the ionic conductivity of PEO-PSEMH-LiClO4. The highest room temperature ionic conductivity of 2.7×10－5 S•cm－1 was recorded when the content of PSEMH was up to 25% and O/Li＋ was 12∶1. The introduction of PSEMH can significantly inhibit the crystallization properties of PEO. On the other hand, there is a coordination role between the oxygen atoms of PSEMH molecular chain and lithium ions, which is involved in the lithium-ion migration movements of composite polymer electrolyte.

Key words: composite polymer electrolyte, PSEMH, PEO, ionic conductivity