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Issue 15, 2016
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High shear-induced exfoliation of graphite into high quality graphene by Taylor–Couette flow

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Abstract

The development of an industrially scalable method to produce large quantities of high quality graphene is essential for its practical application in electronics, composite materials, and energy storage devices. Here, we report a method for bulk preparation of few-layer graphene by shear exfoliation of graphite in liquids. We showed that high shear mixing of graphite and solvent in the Taylor vortex flow regime resulted in an efficient exfoliation of graphite into few-layer graphene with a high yield. According to Raman spectroscopy and X-ray photoelectron spectroscopy, the exfoliated graphene flakes were found to exhibited a low oxidation degree and a low content of defects. Optimization of Taylor flow processing parameters based on computational fluid dynamics (CFD) studies further improved the efficiency of graphite exfoliation, thereby achieving an overall yield of up to ∼5%. The described Taylor flow-based shear exfoliation of graphite may have great potential to produce high quality graphene on an industrially accessible scale.

Graphical abstract: High shear-induced exfoliation of graphite into high quality graphene by Taylor–Couette flow

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Publication details

The article was received on 24 Oct 2015, accepted on 20 Jan 2016 and first published on 25 Jan 2016


Article type: Paper
DOI: 10.1039/C5RA22273G
Citation: RSC Adv., 2016,6, 12003-12008
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    High shear-induced exfoliation of graphite into high quality graphene by Taylor–Couette flow

    T. S. Tran, S. J. Park, S. S. Yoo, T. Lee and T. Kim, RSC Adv., 2016, 6, 12003
    DOI: 10.1039/C5RA22273G

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