高等学校化学学报

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (10): 2339.doi: 10.7503/cjcu20111209

• 高分子化学 • 上一篇    下一篇

共聚型氯醇橡胶锂离子聚合物电解质的制备和性能

白炼, 吉彦舟, 李明, 南策文   

  1. 清华大学材料科学与工程系, 新型陶瓷与精细工艺国家重点实验室, 北京 100084
  • 收稿日期:2011-12-26 出版日期:2012-10-10 发布日期:2012-09-12
  • 通讯作者: 李 明, 男, 博士, 教授, 主要从事锂离子电池聚合物电解质及聚合物基复合材料研究. E-mail: lim@mail.tsinghua.edu.cn E-mail:lim@mail.tsinghua.edu.cn

Preparation and Performances of Polymer Electrolytes Based on the Random Copolymer of Epichlorohydrin and Ethylene Oxide

BAI Lian, JI Yan-Zhou, LI Ming, NAN Ce-Wen   

  1. State Key Laboratory of New Ceramics & Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2011-12-26 Online:2012-10-10 Published:2012-09-12

PDF (PC)

被引次数

8

摘要：

以共聚型氯醇橡胶(ECO)为基体, 通过在基体中溶解不同浓度的LiCF3SO3制备了一系列聚合物电解质. 利用差示扫描量热技术(DSC)研究了该体系锂盐浓度对聚合物电解质玻璃化转变温度的影响, 用傅里叶变换红外光谱(FTIR)研究了体系内锂盐与聚合物基体的相互作用. 结果表明, 在相同锂盐浓度下, ECO基聚合物电解质的室温离子电导率比传统的聚环氧乙烷(PEO)基聚合物电解质提高了2个数量级, 并且体系电导率在升降温循环测试中没有弛豫现象产生. 这是由于ECO基体的非结晶性所致.

关键词: 聚合物电解质, 共聚型氯醇橡胶, 非结晶性, 离子电导率

Abstract:

A series of polymer electrolytes was prepared by dissolving LiCF3SO3 at different ratios in the matrix of epichlorohydrin elastomers(ECO). It is found that the conductivity of ECO-LiCF3SO3 polymer electrolytes increases by nearly two orders of magnitude compared with that of PEO-LiCF3SO3 polymer electrolytes at ambient temperatures and does not exhibit a conductivity hysteresis in heating and cooling scans. The differential scanning calorimetry(DSC) results show the influence of lithium ion concentration on the glass transition temperature(Tg) of polymer electrolytes, while the Fourier transform infrared spectra(FTIR) studies demonstrate the interaction between LiCF3SO3 and polymer matrix. Both the enhancement of ionic conductivity and the lack of conductivity hysteresis for the electrolytes could be attributed to the amorphism of ECO.

Key words: Polymer electrolyte, Epichlorohydrin elastomer(ECO), Amorphism, Ionic conductivity

中图分类号: 

TrendMD: