Expansion and exfoliation of graphite to form graphene

Shashikan P. Patole (Inventor), Pedro M. F. J. Da Costa (Inventor)

Research output: Patent

Abstract

Graphene production methods are described based on subjecting non- covalent graphite intercalated compounds, such as graphite bisulfate, to expansion conditions such as shocks of heat and/or microwaves followed by turbulence-assisted exfoliation to produce few-layer, high quality graphene flakes. Depending on the approach selected for the exfoliation step, free-flowing graphene powder, graphene slurry, or an aqueous graphene mixture can be obtained. Surfactants can aid in dispersion, and graphene inks can be formed. The parameters of the process are simple, efficient and low-cost enabling therefore the scale- up of production. Applications include electrodes and energy storage devices.
Original languageEnglish (US)
Patent numberWO 2017125819 A1
StatePublished - Jul 27 2017

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