Journal of Applied Electrochemistry

, Volume 45, Issue 3, pp 235–244 | Cite as

Compatibility of LiMn2O4 cathode with electrolyte based on low-viscosity ether-functionalized pyrazolium ionic liquid

  • Jianhao Zhang
  • Shaohua Fang
  • Long Qu
  • Yide Jin
  • Li Yang
  • Shin-ichi Hirano
Research Article
Part of the following topical collections:
  1. Batteries


One new ether-functionalized ionic liquid (IL) composed of pyrazolium cation with one 2-ethoxyethyl group and bis(trifluoromethylsulfonyl)imide anion was synthesized and characterized. The IL showed the lowest viscosity among all the reported pyrazolium ILs, and the value was 38.9 mPa s at room temperature. The conductivity of the IL was 3.48 mS cm−1 at 25 °C, and its electrochemical window was 4.4 V. Cycling performance of symmetric lithium cell was investigated for the IL electrolyte with 0.6 mol kg−1 of LiTFSI. Li/LiMn2O4 cell using the IL electrolyte owned good cycling and rate performances, and it was found for the first time that LiMn2O4 cathode was compatible with electrolyte based on ether-functionalized IL. By the characterizations of X-ray diffraction and scanning electron microscopy for fresh and cycled LiMn2O4 electrodes, it was inferred that the slow dissolution of LiMn2O4 in the IL electrolyte might happen during the charge–discharge processes.


Ionic liquid Pyrazolium cation Lithium battery Electrolyte 



The authors thank the Research Center of Analysis and Measurement of Shanghai Jiao Tong University for the help in NMR characterization. This work is financially supported by the National Natural Science Foundation of China (Grants No. 21103108, 21173148 and 21373136).


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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  1. 1.School of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghaiChina
  2. 2.Hirano Institute for Materials InnovationShanghai Jiao Tong UniversityShanghaiChina

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