Theoretical and Experimental Chemistry

, Volume 52, Issue 1, pp 3–9 | Cite as

Effect of the Nature of Exfoliating Agents on the Structure of Graphenes with Various Degrees of Oxidation Obtained by Mechanochemical Treatment

  • O. Yu. Posudievsky
  • O. A. Khazieieva
  • O. A. Kozarenko
  • V. S. Dyadyun
  • V. G. Koshechko
  • V. D. Pokhodenko
Article

Graphenes with various degree of oxidation and capable of forming stable aqueous dispersions were prepared by a mechanochemical method using Na2SO4, KMnO4, and KMnO4 with the addition of a stoichiometric amount of H2SO4 as exfoliating agents in the mechanochemical treatment of graphite. It was established that the lateral dimension of the predominantly monolayer particles of such graphenes amounts to 100-500 nm and decreases with increase of the degree of oxidation. It was shown that various oxygen-containing groups formed as a result of interaction of the nanostructured graphite with atmospheric oxygen and water are present on the surface of the obtained graphenes. It was found that the initial high specific discharge capacity of graphene oxide is reduced during charge–discharge cycling as a result of the irreversibility of the reduction of the oxygen-containing groups and is stabilized at 90 A·h/kg.

Key words

graphene mechanochemical production degree of oxidation electrochemical capacity 

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • O. Yu. Posudievsky
    • 1
  • O. A. Khazieieva
    • 1
  • O. A. Kozarenko
    • 1
  • V. S. Dyadyun
    • 1
  • V. G. Koshechko
    • 1
  • V. D. Pokhodenko
    • 1
  1. 1.L. V. Pisarzhevskii Institute of Physical ChemistryNational Academy of Sciences of UkraineKyivUkraine

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