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Citation: ZHAO Yanqing, WANG Hongyu, GAO Guitian, QI Li. Synthesis and Electrochemical Properties of Short-Chain Hydroxyl Methyl Imidazole Ionic Liquids[J]. Chinese Journal of Applied Chemistry, ;2012, 29(12): 1457-1462. doi: 10.3724/SP.J.1095.2012.20434 shu

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

ZHAO Yanqing ^a,b ,
WANG Hongyu ^a ,
GAO Guitian ^b ,
QI Li ^a,,

1.
a State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2.
b School of Materials Science and Engineering, Jilin University, Changchun 130022, China

Corresponding author: QI Li,
Received Date: 27 September 2012
Available Online: 12 October 2012
Fund Project: 国家重大科学研究计划973项目(2012CB932800,2011CB935702) (2012CB932800,2011CB935702)

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.
- ionic liquids,
- polyethylene glycol,
- lithium ion battery,
- Vogel-Tmman-Fulcher function,
- electrochemical properties
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