A method for producing graphene. The method includes loading an open-cell porous backbone material with particulate graphite, submersing at least part of the graphite-loaded porous backbone material in a solution, and applying a cathodic potential to the graphite-loaded porous backbone material, wherein the cathodic potential suffices to exfoliate graphene.
A method for the continuous production of graphene. The method includes flowing a suspension of graphite particles into a conductive, open-cell porous material that is disposed within a reaction vessel, applying a cathodic potential to the conductive, open-cell porous material, wherein the cathodic potential suffices to exfoliate graphene, and flowing a suspension of the exfoliated graphene out from the conductive, open-cell porous material.
A method for the continuous production of graphene. The method includes flowing a suspension of graphite particles into a conductive, open-cell porous material that is disposed within a reaction vessel, applying a cathodic potential to the conductive, open-cell porous material, wherein the cathodic potential suffices to exfoliate graphene, and flowing a suspension of the exfoliated graphene out from the conductive, open-cell porous material.
A method for producing graphene. The method includes loading an open-cell porous backbone material with particulate graphite, submersing at least part of the graphite-loaded porous backbone material in a solution, and applying a cathodic potential to the graphite-loaded porous backbone material, wherein the cathodic potential suffices to exfoliate graphene.
Compositions comprising hydrogenated and dehydrogenated graphite comprising a plurality of flakes. At least one flake in ten has a size in excess of ten square micrometers. For example, the flakes can have an average thickness of 10 atomic layers or less.
H01B 1/04 - Conductors or conductive bodies characterised by the conductive materialsSelection of materials as conductors mainly consisting of carbon-silicon compounds, carbon, or silicon
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
B82Y 40/00 - Manufacture or treatment of nanostructures
Compositions comprising hydrogenated and dehydrogenated graphite comprising a plurality of flakes. At least one flake in ten has a size in excess of ten square micrometers. For example, the flakes can have an average thickness of 10 atomic layers or less.
H01B 1/04 - Conductors or conductive bodies characterised by the conductive materialsSelection of materials as conductors mainly consisting of carbon-silicon compounds, carbon, or silicon
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
B82Y 40/00 - Manufacture or treatment of nanostructures
7.
METHOD AND APPARATUS FOR THE EXPANSION OF GRAPHITE
In a first implementation, a method for exfoliation of graphene flakes from a graphite sample includes compressing a graphite sample in an electrochemical reactor and applying a voltage between the graphite sample and an electrode in the electrochemical cell.
In a first implementation, a method for exfoliation of graphene flakes from a graphite sample includes compressing a graphite sample in an electrochemical reactor and applying a voltage between the graphite sample and an electrode in the electrochemical cell.
Compositions comprising hydrogenated and dehydrogenated graphite comprising a plurality of flakes. At least one flake in ten has a size in excess of ten square micrometers. For example, the flakes can have an average thickness of 10 atomic layers or less.
ABSTRACT Composites comprising hydrogenated graphene comprising a plurality of flakes of up to 10 carbon layers. At least 10% of the flakes have a size greater than 10 square micrometers. A coefficient of determination value of 2D single peak fitting of µ-Raman spectra of the graphene after thermal treatment is larger than 0.99 for more than 50 % of the spectra. A defect density characteristic of µ-Raman spectra of the hydrogenated graphene has an average D/G area ratio between 0.2 and 4, wherein at least 60% of the defects are reversible hydrogenation of sp3-hybridized carbon sites other than sp3- hybridized carbon sites at the edges of the flakes, wherein at least 30% of sp3 hybridized carbon sites of the composition are one or more of a) functionalized with a non-hydrogen chemical group, or b) cross-linked with sp3 hybridized carbon sites of other flakes.
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