Continuous electrochemical exfoliation of micrometer-sized graphene using synergistic ion intercalations and organic solvents
This source preferred by Amor Abdelkader
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Authors: Abdelkader, A.M., Kinloch, I.A. and Dryfe, R.A.W.
Journal: ACS Applied Materials and Interfaces
A novel top-down electrochemical method is demonstrated to prepare gram quantities of few-layer graphene in a single-step, one-pot process. Potential-controlled cathodic reduction is used to intercalate graphite electrodes with alkali-substituted, ammonium- and dimethyl sulfoxide-solvated cations. In situ decomposition of the intercalated compounds breaks the π-π stacking of the graphene layers along the c axis of the graphite gallery, producing 1-20-μm-diameter few-layer graphene sheets, without the need for defect-inducing oxidative or sonication treatments. With a slight modification of the electrodes' configuration, the process can run in a continuous manner, presenting a potentially scalable approach for few-layer graphene production. © 2014 American Chemical Society.