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Surface modification of carbon materials by nitrogen/phosphorus co-doping as well as redox additive of ferrous ion for cooperatively boosting the performance of supercapacitors

  • Zhong Jie ZhangEmail author
  • Bing Han
  • Kun Yang Zhao
  • Ming Hui Gao
  • Zhen Qiang Wang
  • Xin Ming Yang
  • Xiang Ying ChenEmail author
Original Paper


In this work, we demonstrate a cooperative strategy of surface modification of carbon materials by N/P co-doping and redox additive of Fe2+ ion for boosting the performance of supercapacitors. Using NH4HCO3 or NH4H2PO4 as N/P dopants, the modified carbon materials have increased concerning the electrical conductivity, porosity, and N/P contents. Furthermore, Fe2+ ion serving as redox additive has been incorporated. In a three-electrode configuration, the C-N-P-Fe sample exhibits capacitance of 371 F g−1, which is 2.38 times larger than the C-Blank-Fe sample; the redox process of Fe2+ ions is controlled by the diffusion. In a two-electrode configuration, the C-N-P-Fe sample delivers energy density of 7.7 Wh kg−1, almost 2.33 times higher than the C-Blank-Fe sample. Moreover, it unveils that the pseudo-capacitance contribution has been improved with increasing N/P doping by Trasatti method; the redox process of Fe2+ ions predominantly happens on negative electrode.


Surface modification Nitrogen/phosphor Redox additive Cooperatively Supercapacitor 



The authors gratefully thank financial support from National Natural Science Foundation of China (51602003), Startup Foundation for Doctors of Anhui University (J01003211), and University Student Innovation Experiment Project of Anhui University (S201910357378).


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Copyright information

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

Authors and Affiliations

  • Zhong Jie Zhang
    • 1
    Email author
  • Bing Han
    • 1
  • Kun Yang Zhao
    • 1
  • Ming Hui Gao
    • 1
  • Zhen Qiang Wang
    • 1
  • Xin Ming Yang
    • 2
  • Xiang Ying Chen
    • 2
    • 3
    Email author
  1. 1.School of Chemistry & Chemical Engineering, Anhui Province Key Laboratory of Environment-friendly Polymer MaterialsAnhui UniversityHefeiPeople’s Republic of China
  2. 2.Anhui Province Key Laboratory of Green Manufacturing of Power BatteryTianneng Battery Group (Anhui Company)JieshouPeople’s Republic of China
  3. 3.School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical EngineeringHefei University of TechnologyHefeiPeople’s Republic of China

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