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Open AccessArticle

The Influence of the Interlayer Distance on the Performance of Thermally Reduced Graphene Oxide Supercapacitors

Department of Mold and Die Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80778, Taiwan
Materials 2018, 11(2), 263; https://doi.org/10.3390/ma11020263
Received: 18 January 2018 / Revised: 4 February 2018 / Accepted: 5 February 2018 / Published: 8 February 2018
(This article belongs to the Special Issue Advanced Functional Nanomaterials and Their Applications)
In this paper, cationic surfactant cetyltrimethylammonium bromide (CTAB) was employed to prevent the restack of the thermally reduce graphene oxide (TRG) sheets. A facile approach was demonstrated to effectively enlarge the interlayer distance of the TRG sheets through the ionic interaction between the intercalated CTAB and ionic liquids (ILs). The morphology of the composites and the interaction between the intercalated ionic species were systematically characterized by SEM, SAXS, XRD, TGA, and FTIR. In addition, the performance of the EDLC cells based on these TRG composites was evaluated. It was found that due to the increased interlayer distance (0.41 nm to 2.51 nm) that enlarges the accessible surface area for the IL electrolyte, the energy density of the cell can be significantly improved (23.1 Wh/kg to 62.5 Wh/kg). View Full-Text
Keywords: ionic liquids; supercapacitors; reduced graphene oxide; cationic surfactant; interlayer distance ionic liquids; supercapacitors; reduced graphene oxide; cationic surfactant; interlayer distance
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Lin, J.-H. The Influence of the Interlayer Distance on the Performance of Thermally Reduced Graphene Oxide Supercapacitors. Materials 2018, 11, 263.

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