Ionic liquid-solvent mixture of propylene carbonate and 1,2-dimethoxyethane as electrolyte for electric double-layer capacitor

  • Hai LuEmail author
  • Long He
  • Xiangyuan Li
  • Wei Zhang
  • Jingfeng Che
  • Xiao Liu
  • Zhenzhong Hou
  • Huiling Du
  • Yaohui QuEmail author


Ionic liquid EMIBF4 (EMI) was combined with propylene carbonate (PC) and/or 1,2-dimethoxyethane (DME) for electric double-layer capacitors (EDLCs). The effects of these support solvents on physicochemical properties of the electrolyte and capacitance performances of the capacitor were investigated. Compared to pure EMI, the existence of support solvent of PC or PC-DME provides better power characteristic mainly profited from improved ion conductivity, but sacrifices the stable potential window to some extent. The capacitor employing activated carbon and the electrolyte EMI-PC-DME yields an active mass normalized energy density of 38.5 Wh kg−1 at ~ 900 W kg−1 for the cut-off voltage of 3 V. It is a significant performance improvement compared to EMI and EMI-PC system at identical operation condition. This research guides an attractive direction to construct advanced 3 V based EDLC with excellent overall properties.



This work was supported by the Natural Science Foundation of China (Nos. 51604221 and 51372197), the Key Innovation Team of Shaanxi Province (2014KCT-04), the Key Research and Development Program of Shaanxi Province (2017GY-133), and Youth Science Foundation of Jiangxi Province (No. 20171BAB216024).


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Hai Lu
    • 1
    Email author
  • Long He
    • 1
  • Xiangyuan Li
    • 2
  • Wei Zhang
    • 2
  • Jingfeng Che
    • 2
  • Xiao Liu
    • 1
  • Zhenzhong Hou
    • 1
  • Huiling Du
    • 1
  • Yaohui Qu
    • 3
    Email author
  1. 1.School of Materials Science and EngineeringXi’an University of Science and TechnologyXi’anChina
  2. 2.Xi’an Herong New Energy Technology Co., LtdXi’anChina
  3. 3.Jiangxi Key Laboratory of Nanomaterials and Sensors, School of Physics, Communication and ElectronicsJiangxi Normal UniversityNanchangChina

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