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US 2026/0274675 A1Published application
Graphene and methods of making graphene
OwnerXiaodong LI, Jiajun HEinventors
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Abstract
The present disclosure provides for methods of making graphene, systems for making graphene and graphene produced from the methods and systems. Biomass materials, such as cotton materials, can be converted to graphite and then the graphite is converted into graphene. One method of the present disclosure can include removing substances from the biomass material, carbonization, graphitization, and exfoliation.
Claims21
A method of making graphene, comprising:
- providing a biomass material, wherein the biomass material comprising cellulose-based fibers;
- exposing the biomass material to an activating agent to form a treated biomass material;
- carbonizing the treated biomass material in a furnace at a temperature of about 400 to 1200° C. for about 0.5 to 4 hours to form carbonized biomass material;
- graphitizing, after carbonizing, the carbonized biomass material in the furnace at about 1000 to 3000° C. for about 0.5 to 3 hours to form graphite;
- shear mixing the graphite with optional hydrogen passivation of the graphite;
- and
- ultrasonication, after shear mixing, of the graphite, with optional hydrogen passivation of the graphite, to form graphene.
4 more elements
A method of making graphene, comprising:
- providing a biomass material, wherein the biomass material comprising cellulose-based fibers;
- exposing the biomass material to an activating agent to form a treated biomass material, wherein the activating agent disrupts interlayer interactions within the biomass material;
- carbonizing the treated biomass material in a furnace at a temperature of about 500 to 1000° C. for about 0.5 to 4 hours to form carbonized biomass material;
- graphitizing, after carbonizing, the carbonized biomass material in the furnace at about 1100 to 2200° C. for about 0.5 to 3 hours to form graphite;
- shear mixing the graphite with concurrent hydrogen passivation of the graphite;
- and
- ultrasonication of the graphite, with concurrent hydrogen passivation of the graphite, to form graphene.
4 more elements
17-24. (canceled)
A method of making graphene, comprising:
- providing a cotton material, wherein the cotton material comprising cellulose-based fibers;
- exposing the cotton material to an activating agent to form a treated cotton material;
- carbonizing the treated cotton material in a furnace at a temperature of about 600 to 900° C. for about 0.5 to 4 hours to form carbonized cotton material;
- graphitizing, after carbonizing, the carbonized cotton material in the furnace at about 1000 to 1200° C. for about 1 to 3 hours to form graphite;
- shear mixing the graphite with concurrent hydrogen passivation of the graphite;
- and
- ultrasonication of the graphite with concurrent hydrogen passivation of the graphite, to form graphene, wherein a total time of shear mixing and ultrasonication is about 1 to 12 hours.
4 more elements
28-35. (canceled)
Dependencies are inferred from the claim text.