Method for preparing graphene
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsLionel Dubois, Serge Gambarelli, Ashok Nanjundan
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Abstract
The present invention relates to a method for preparing graphene substantially free of contamination by metallic, magnetic, organic and inorganic impurities, and also to the use of the resulting graphene for the production of transparent electrodes, batteries, electron-acceptor or electron-donor materials, in particular in photovoltaic systems, photovoltaic panels, transistor channels, in particular in electronics, nonlinear emitters or absorbers of infrared photons, current-conducting electrodes, anti-static coatings, chemical detectors, vias and interconnections in electronics, current-conducting cables, and solar cells.
Claims18
A process for preparing graphene whose degree of contamination with metallic, magnetic, organic and mineral impurities is not more than 0.01% by mass, relative to the total mass of the graphene, the process comprising
- a) reacting a dispersion of graphene oxide (GO) in at least one solvent selected from the group consisting of a solvent having a nonzero dipole moment a mineral acid, and an organic acid, with at least one tin compound and at least one acidic compound, wherein a pH of the dispersion is less than 7, to obtain graphene, and
- b) performing at least one acidic washing at a pH <5 on the graphene obtained in a), to obtain graphene whose degree of contamination with metallic, magnetic, organic and mineral impurities is not more than 0.01% by mass, relative to the total mass of the graphene.
Dependencies are inferred from the claim text.