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Journal of Materials Science

, Volume 46, Issue 8, pp 2422–2430 | Cite as

Effect of the microstructure on the intercalation and exfoliation behaviour of graphite

  • Olga Khvostikova
  • Helmut HermannEmail author
  • Horst Wendrock
  • Thomas Gemming
  • Jürgen Thomas
  • Helmut Ehrenberg
Article

Abstract

The process of the preparation of graphitic nanoplatelets via chemical intercalation and thermal exfoliation of graphite was considered. The dependence of the properties of the final product on the microstructure of the raw material and on different process parameters was analyzed. It is shown that the microstructure of the raw material has considerable influence on the structural transformations during the different preparation steps. The observed differences can be understood assuming that intercalation is initiated at the edges of graphite crystallites by the formation of intercalate nuclei. Essential differences of the nucleation time appear for unequal types of microstructure and give rise to different intercalation states. It is also shown that the sub-process of washing and drying the samples after intercalation is most critical and has significant influence on the characteristics of the final products. The results suggest that graphite fibres with sub-micron diameter and orientation of the crystallographic c-axis along the fibre axis will be particularly favourable for the preparation of graphitic nanoplatelets.

Keywords

Highly Orient Pyrolytic Graphite Graphite Flake Graphitic Sheet Stage Number Intercalation Process 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

Financial support by EnBW Energie Baden-Württemberg AG is gratefully acknowledged. This study has also benefited from support from the European Union and the Free State of Saxony within the European Centre for Emerging Materials and Processes Dresden (ECEMP, grant no. 13858/2379).

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Olga Khvostikova
    • 1
  • Helmut Hermann
    • 1
    Email author
  • Horst Wendrock
    • 1
  • Thomas Gemming
    • 1
  • Jürgen Thomas
    • 1
  • Helmut Ehrenberg
    • 1
  1. 1.IFW Dresden, Institute for Complex MaterialsDresdenGermany

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