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US 10,407,801 B2Granted
Carbon fiber composition including graphene nano-powder and fabrication method for carbon fiber using the same
AssigneeKorea Institute of Science and Technology
InventorsJae Kap Lee, Won Kook Choi
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Abstract
The present disclosure relates to a carbon fiber composition and a fabrication method for high-performance carbon fiber using the same. The method can fabricate high-performance carbon fiber (or graphite fiber) with lowering a graphitization temperature by using graphene carbon fiber composition including nano-sized graphene.
Claims9
A method for fabricating high-performance carbon fiber, the method comprising steps of:
- a mixing step to make a graphene carbon fiber composition by mixing a composition for fabricating carbon fiber, and graphene powder, wherein the composition for fabricating carbon fiber includes one selected from the group consisting of, pitch, rayon and combinations thereof;
- and
- a heat treatment step of the graphene carbon fiber composition, and
- wherein the graphene powder serves as a seed of nanoribbon-shaped graphite to be formed during carbon fiber fabricating processes.
1 more element
A method for fabricating high-performance carbon fiber, the method comprising steps of:
- a mixing step to fabricate a graphene suspension by mixing a composition for fabricating carbon fiber with graphene powder to form a graphene carbon fiber composition, and dispersing the graphene carbon fiber composition in a solvent, wherein the composition for fabricating carbon fiber includes one selected from the group consisting of, pitch, rayon and combinations thereof;
- a fabrication step to fabricate mixed-fiber by controlling a viscosity of the graphene suspension and performing a fiberization process of the graphene suspension;
- a stabilization step to stabilize the fibers by heating at 200˜400° C. under atmosphere;
- and
- a heat treatment step of fabricating nano ribbon-shaped graphite by graphitization of the stabilized fibers at a temperature less than 2,500° C.,
- wherein the graphene powder included in the graphene carbon fiber composition serves as a seed of graphite to be formed during high-performance carbon fiber fabricating processes.
3 more elements
Dependencies are inferred from the claim text.