CRCU

Chemical Research in Chinese Universities ›› 2013, Vol. 29 ›› Issue (4): 735-742.doi: 10.1007/s40242-013-3181-9

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Supercapacitor Performance of Hollow Carbon Spheres by Direct Pyrolysis of Melamine-formaldehyde Resin Spheres

MA Fang-wei1,2, SUN Li-ping1, ZHAO Hui1, LI Qiang1, HUO Li-hua1, XIA Tian1, GAO Shan1   

  1. 1. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, P. R. China;
    2. Key Laboratory of Chemical Engineering Process &Technology for High-efficiency Conversion of Heilongjiang Province, Heilongjiang University, Harbin 150080, P. R. China
  • Received:2013-04-23 Revised:2013-05-10 Online:2013-08-01 Published:2013-07-15
  • Contact: ZHAO Hui E-mail:zhaohui98@yahoo.com
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.51072048, 51102083), the Natural Science Foundation of Heilongjiang Province, China(Nos.JC201211, B201107) and the Program for Science and Technology Project of Heilongjiang Province, China(No.WB10A204).

Cited

7

Abstract:

The nitrogen and oxygen co-doped hollow carbon spheres(HCSs) were prepared via a simple pyrolysis of solid melamine-formaldhyde resin spheres. The carbonization temperature has an important influence on the specific surface area, pore-size distribution and heteroatom contents of HCSs. The synergistic effects of those physical and chemical properties on supercapacitor performance were systematically investigated. Among the HCSs obtained at different temperatures, HCSs-800(co-doped HCSs at 800 ℃) exhibits the best reversible specific capacitance in 2 mol/L H2SO4 electrolyte and meanwhile maintains a high-class capacitance retention capability. The nitrogen heteroatoms were confirmed to play a crucial role in improving capacitance in an acid medium. This kind of nitrogen doped HCSs is a potential candidate for an efficient electrode material for supercapacitors.

Key words: Hollow carbon sphere, Pyrolysis, Melamine-formaldehyde resin, Supercapacitor, Nitrogen-dope