, Volume 25, Issue 9, pp 4351–4360 | Cite as

High energy density supercapacitor based on N/B co-doped graphene nanoarchitectures and ionic liquid electrolyte

  • Zhongliang Yu
  • Jiahe Zhang
  • Chunxian Xing
  • Lei Hu
  • Lili Wang
  • Ming Ding
  • Haitao ZhangEmail author
Original Paper


Boron-nitrogen co-doped graphene nanoarchitectures were synthesized by annealing a freeze-dried precursor containing exfoliated graphene oxide (GO) nanosheets, ammonium borate, and polyvinyl alcohol (PVA). The microstructures and composition of nanocomposites were optimized and characterized systemically. Effects of a doping element on the electrochemical performances and interface compatibility were evaluated. The restacking of exfoliated graphene nanosheets was hindered effectively by the ultra-fine carbon clusters formed via the thermal decomposition of PVA. Such a three-dimensional structure favors the fast mobility of electrolyte ions. In addition, the co-doping of N and B elements not only increases interface compatibility between ionic liquid electrolyte and graphene but also supplies extra pseudocapacitance. Benefiting from the integrated merits, the optimized nanocomposites could deliver a specific capacitance of 35.4 F g−1 at 1 A g−1 and present a maximum energy density of 78.7 Wh kg−1 with a power density of 2043 W kg−1. Due to the formation of more decoupled ions in ionic liquid electrolyte at elevated temperature, the symmetric supercapacitors based on the as-formed nanocomposite exhibit a maximum energy density of 134.6 Wh kg−1 at 60 °C.


Doping effect Graphene Supercapacitor Ionic liquid 


Funding information

This work was financially supported by the National Key Research and Development Program of China (2016YFB0100303), Key Research Program of Frontier Sciences (QYZDY-SSW-JSC011), and the National Natural Science Foundation of China (No. 21878308). Prof. Suojiang Zhang (IPE, CAS) is sincerely appreciated for his careful academic guidance and great support.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Zhongliang Yu
    • 1
    • 2
  • Jiahe Zhang
    • 1
  • Chunxian Xing
    • 1
  • Lei Hu
    • 1
    • 3
  • Lili Wang
    • 1
    • 3
  • Ming Ding
    • 3
  • Haitao Zhang
    • 1
    Email author
  1. 1.Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, Institute of Process EngineerinChinese Academy of ScienceBeijingPeople’s Republic of China
  2. 2.Department of Biological and Environmental EngineeringHefei UniversityHefeiPeople’s Republic of China
  3. 3.Department of Chemical and Materials EngineeringHefei UniversityHefeiPeople’s Republic of China

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