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短链羟基甲基咪唑离子液体的合成与电化学性能

赵艳青1,2,王宏宇1,高桂天2,齐力1*   

  1. (1.中国科学院长春应用化学研究所电分析化学国家重点实验室 长春 130022;
    2.吉林大学材料科学与工程学院 长春 130022)
  • 收稿日期:2012-09-27 修回日期:2012-10-17 出版日期:2012-12-10 发布日期:2012-12-10
  • 通讯作者: 齐力，副研究员; Tel:0431-85262915; E-mail:qil@ciac.jl.cn; 研究方向：聚合物电解质
  • 基金资助:
    国家重大科学研究计划973项目(2012CB932800,2011CB935702)

Synthesis and Electrochemical Properties of Short-Chain Hydroxyl Methyl Imidazole Ionic Liquid

ZHAO Yanqing1,2, WANG Hongyu1, GAO Guitian2, QI Li1*   

  1. (1.State Key Laboratory of Electroanalytical Chemistry,Changchun Institute of
    Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;
    2.School of Materials Science and Engineering,Jilin University,Changchun 130022,China)
  • Received:2012-09-27 Revised:2012-10-17 Published:2012-12-10 Online:2012-12-10

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1389

被引次数

6 | 1

摘要： 通过2-(2-氯乙氧基)乙醇和2-溴乙醇分别与1-甲基咪唑反应，合成乙醇基甲基咪唑溴（EMIMBr）和乙氧基乙醇基甲基咪唑氯（EEMIMCl）2种羟基咪唑离子液体，用1H NMR和FT-IR表征结构，TG和DSC进行热性能测试，并研究了其电化学性能。 结果表明，羟基类咪唑离子液体具有高的热稳定性，这种含醚氧键和羟基的短链离子液体有利于电导率的提高，导电机理符合Vogel-Tmman-Fulcher（VTF）方程。 乙醇基甲基咪唑溴和乙氧基乙醇基甲基咪唑氯的室温电导率分别为1.2×10-4和1.7×10-4 S/cm。 对于碳酸丙二醇酯、乙氧基乙醇基甲基咪唑氯和钾盐体系，室温电导率最高可达3.82×10-3 S/cm。 乙氧基乙醇基甲基咪唑氯的电化学窗口为3.4 V。

关键词: 离子液体, 聚乙二醇, 锂离子电池, VTF方程, 电化学性能

Abstract: Ethanol methylimidazole bromide and ethoxy ehanol methylimidazole chloride were synthetized by the reaction of 1-methylimidazole with 2-(2-chloro-ethoxy)-ethanol and 2-bromoethanol, respectively. The structures were characterized using 1H HMR and FT-IR. The thermal performances of the products were examined by TG and DSC, and the electrochemical properties were also studied. The results show that the hydroxyl imidazole ionic liquid has an eminent thermal stability. The short-chain ionic liquid containing an ether bond and a hydroxyl is beneficial to improving the conductivity, and the conductive mechanism can be rationalized by the Vogel-Tmman-Fulcher(VTF) function. the ethanol methylimidazole bromide and ethoxy ethanol methylimidazole chloride have conductivities of 1.2×10-4 S/cm and 1.7×10-4 S/cm, respectively, at room temperature. For the system containing propylene carbonate, ethoxy ethanol methylimidazole chloride and potassium, the maxium conductivity can reach 3.82×10-3 S/cm. The electrochemical window of the ethoxy ethanol methylimidazole chloride is 3.4 V.

Key words: ionic liquids, polyethylene glycol, lithium ion battery, VTF function, electrochemical properties

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