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Examining the interlayer interactions formed between reduced graphene oxide and ionic liquids

Published online by Cambridge University Press:  01 March 2013

Natis Shafiq ,
Muge Acik ,
Daniel R. Dreyer ,
Juan Juarez ,
Christopher W. Bielawski  and
Yves J. Chabal
Natis Shafiq
Affiliation:
Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080-3021
Muge Acik
Affiliation:
Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080-3021
Daniel R. Dreyer
Affiliation:
Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, Texas 78712
Juan Juarez
Affiliation:
Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080-3021
Christopher W. Bielawski
Affiliation:
Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, Texas 78712
Yves J. Chabal*
Affiliation:
Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080-3021
*
Address all correspondence to Yves J. Chabal at[email protected]
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Abstract

It is important to understand the electrolyte–electrode interactions for fabricating graphene oxide (GO)- and ionic liquid (IL)-based ultracapacitors. Therefore, we explored how the type and size of the cations in various ILs determine the nature of processed materials. In all cases, the ILs intercalate into the graphitic structure but marked differences are observed during exfoliation via thermal reduction. The combination of a long alkyl chain ammonium-based cation and a large-volume anion leads to strong interactions and defect formation, as evidenced by CO2 production during annealing. In contrast, using the same anions but different cations stabilize the GO functional groups below 400 °C.

Type
Research Letters
Information
MRS Communications , Volume 3 , Issue 1 , March 2013 , pp. 67 - 71
Copyright
Copyright © Materials Research Society 2013

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