短链羟基甲基咪唑离子液体的合成与电化学性能  

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

作　　者：赵艳青[1,2] 王宏宇[1] 高桂天[2] 齐力[1] 

机构地区：[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

出　　处：《应用化学》2012年第12期1457-1462,共6页Chinese Journal of Applied Chemistry

基　　金：国家重大科学研究计划973项目(2012CB932800;2011CB935702)

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1.7×10-4S/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3.82×10-3S/cm。乙氧基乙醇基甲基咪唑氯的电化学窗口为3.4 V。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.

关 键 词：离子液体 聚乙二醇 锂离子电池 VTF方程 电化学性能 

分 类 号：O631[理学—高分子化学]