Patent
US 7,071,258Nano-Scaled Graphene Plates and Process for Production
Bor Z. Jang, W. C. Huang
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 7,071,258Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 conceptually illustrates the configuration difference between a carbon nano-tube and a nano-scaled graphene plate.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A process for producing a nano-scaled graphene plate material comprising the steps of: a). either partially or fully carbonizing a precursor polymer or heat-treating petroleum or coal tar pitch to produce a polymeric carbon containing micron- and/or nanometer-scaled graphite crystallites with each crystallite comprising one sheet or a multiplicity of sheets of graphite plane; b). exfoliating said graphite crystallites in said polymeric carbon; and c). subjecting said polymeric carbon containing exfoliated graphite c r ystallites to a mechanical attrition treatment to produce said nano-scaled graphene plate material.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said precursor polymer, petroleum or coal tar pitch is in a fiber form.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said precursor polymer is selected from the group consisting of polyacrylonitrile and its copolymers or derivatives, phenol formaldehyde and its copolymers or derivatives, rayon and its derivatives, cellulose and its derivatives, and combinations thereof.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said step of carbonizing or heat-treating comprises a heat treatment at a temperature in the range of 300 * C to 2,500 *C.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said step of carbonizing or heat-treating comprises a heat treatment at a temperature in the range of 300 * C to 1,000 *C.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said step of exfoliating comprises contacting said polymeric carbon with an oxidizing agent selected from the group consisting of nitric acid, potassium chlorate, chromic acid, potassium permanganate, potassium chromate, potassium dichromate, perch l oric acid, phosphoric acid, sulfuric acid, trifluoroacetic acid, organic acid, and mixtures thereof.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said mechanical attrition treatment comprises a ball milling treatment of said polymeric carbon.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said mechanical attrition treatment comprises operating a high-energy planetary ball mill.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said polymeric carbon produced in step (a) is pulverized to become small particle or short fiber segment forms prior to step (b).
(New) A nano-scaled graphene plate material comprising at least a nanometer-scaled plate with said plate comprising a sheet of graphite plane or a multiplicity of sheets of graphite plane; said graphite plane comprising a two-dimensional hexagonal lattice of carbon atoms and said plate having a length and a width parallel to said graphite plane and a thickness orthogonal to said graphite plane characterized in that the length, width, and thickness values are all smaller than 10 nanometers.
A composite material containing a matrix material and a predetermined proportion of nanoscaled graphene plate material as a reinforcement material, said nano-scaled graphene plate material comprising at least a nanometer-scaled plate with said plate comprising a sheet of graphite plane or a multiplicity of sheets of graphite plane; said graphite plane comprising a two-dimensional hexagonal lattice of carbon atoms and said plate having a length and a width parallel to said graphite plane and a thickness orthogonal to said graphite plane characterized in that at least one of the length, width, and thickness values is 100 nanometers or smaller..
The composite material as set forth in claim 21, wherein said nano-scaled graphene plate material is at a proportion of no more than 15% by volume.
The composite material as set forth in claim 21, wherein said matrix material is selected from the group consisting of a polymer, a metal, a ceramic, a carbon, a glass, an organic material, or a combination thereof.
Layer stacks claimed or described, ordered top of device to substrate.
nano-scaled graphene plate composite material
Materials described outside the worked examples.
precursor polymer
petroleum pitch
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
NGP plate length and width | ≤ 100 nm | nano-scaled graphene plate (NGP) |
NGP plate thickness | ≤ 100 nm |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 7,071,258Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 conceptually illustrates the configuration difference between a carbon nano-tube and a nano-scaled graphene plate.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A process for producing a nano-scaled graphene plate material comprising the steps of: a). either partially or fully carbonizing a precursor polymer or heat-treating petroleum or coal tar pitch to produce a polymeric carbon containing micron- and/or nanometer-scaled graphite crystallites with each crystallite comprising one sheet or a multiplicity of sheets of graphite plane; b). exfoliating said graphite crystallites in said polymeric carbon; and c). subjecting said polymeric carbon containing exfoliated graphite c r ystallites to a mechanical attrition treatment to produce said nano-scaled graphene plate material.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said precursor polymer, petroleum or coal tar pitch is in a fiber form.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said precursor polymer is selected from the group consisting of polyacrylonitrile and its copolymers or derivatives, phenol formaldehyde and its copolymers or derivatives, rayon and its derivatives, cellulose and its derivatives, and combinations thereof.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said step of carbonizing or heat-treating comprises a heat treatment at a temperature in the range of 300 * C to 2,500 *C.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said step of carbonizing or heat-treating comprises a heat treatment at a temperature in the range of 300 * C to 1,000 *C.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said step of exfoliating comprises contacting said polymeric carbon with an oxidizing agent selected from the group consisting of nitric acid, potassium chlorate, chromic acid, potassium permanganate, potassium chromate, potassium dichromate, perch l oric acid, phosphoric acid, sulfuric acid, trifluoroacetic acid, organic acid, and mixtures thereof.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said mechanical attrition treatment comprises a ball milling treatment of said polymeric carbon.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said mechanical attrition treatment comprises operating a high-energy planetary ball mill.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said polymeric carbon produced in step (a) is pulverized to become small particle or short fiber segment forms prior to step (b).
(New) A nano-scaled graphene plate material comprising at least a nanometer-scaled plate with said plate comprising a sheet of graphite plane or a multiplicity of sheets of graphite plane; said graphite plane comprising a two-dimensional hexagonal lattice of carbon atoms and said plate having a length and a width parallel to said graphite plane and a thickness orthogonal to said graphite plane characterized in that the length, width, and thickness values are all smaller than 10 nanometers.
A composite material containing a matrix material and a predetermined proportion of nanoscaled graphene plate material as a reinforcement material, said nano-scaled graphene plate material comprising at least a nanometer-scaled plate with said plate comprising a sheet of graphite plane or a multiplicity of sheets of graphite plane; said graphite plane comprising a two-dimensional hexagonal lattice of carbon atoms and said plate having a length and a width parallel to said graphite plane and a thickness orthogonal to said graphite plane characterized in that at least one of the length, width, and thickness values is 100 nanometers or smaller..
The composite material as set forth in claim 21, wherein said nano-scaled graphene plate material is at a proportion of no more than 15% by volume.
The composite material as set forth in claim 21, wherein said matrix material is selected from the group consisting of a polymer, a metal, a ceramic, a carbon, a glass, an organic material, or a combination thereof.
Layer stacks claimed or described, ordered top of device to substrate.
nano-scaled graphene plate composite material
Materials described outside the worked examples.
precursor polymer
petroleum pitch
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
NGP plate length and width | ≤ 100 nm | nano-scaled graphene plate (NGP) |
NGP plate thickness | ≤ 100 nm |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 7,071,258Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 conceptually illustrates the configuration difference between a carbon nano-tube and a nano-scaled graphene plate.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A process for producing a nano-scaled graphene plate material comprising the steps of: a). either partially or fully carbonizing a precursor polymer or heat-treating petroleum or coal tar pitch to produce a polymeric carbon containing micron- and/or nanometer-scaled graphite crystallites with each crystallite comprising one sheet or a multiplicity of sheets of graphite plane; b). exfoliating said graphite crystallites in said polymeric carbon; and c). subjecting said polymeric carbon containing exfoliated graphite c r ystallites to a mechanical attrition treatment to produce said nano-scaled graphene plate material.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said precursor polymer, petroleum or coal tar pitch is in a fiber form.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said precursor polymer is selected from the group consisting of polyacrylonitrile and its copolymers or derivatives, phenol formaldehyde and its copolymers or derivatives, rayon and its derivatives, cellulose and its derivatives, and combinations thereof.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said step of carbonizing or heat-treating comprises a heat treatment at a temperature in the range of 300 * C to 2,500 *C.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said step of carbonizing or heat-treating comprises a heat treatment at a temperature in the range of 300 * C to 1,000 *C.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said step of exfoliating comprises contacting said polymeric carbon with an oxidizing agent selected from the group consisting of nitric acid, potassium chlorate, chromic acid, potassium permanganate, potassium chromate, potassium dichromate, perch l oric acid, phosphoric acid, sulfuric acid, trifluoroacetic acid, organic acid, and mixtures thereof.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said mechanical attrition treatment comprises a ball milling treatment of said polymeric carbon.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said mechanical attrition treatment comprises operating a high-energy planetary ball mill.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said polymeric carbon produced in step (a) is pulverized to become small particle or short fiber segment forms prior to step (b).
(New) A nano-scaled graphene plate material comprising at least a nanometer-scaled plate with said plate comprising a sheet of graphite plane or a multiplicity of sheets of graphite plane; said graphite plane comprising a two-dimensional hexagonal lattice of carbon atoms and said plate having a length and a width parallel to said graphite plane and a thickness orthogonal to said graphite plane characterized in that the length, width, and thickness values are all smaller than 10 nanometers.
A composite material containing a matrix material and a predetermined proportion of nanoscaled graphene plate material as a reinforcement material, said nano-scaled graphene plate material comprising at least a nanometer-scaled plate with said plate comprising a sheet of graphite plane or a multiplicity of sheets of graphite plane; said graphite plane comprising a two-dimensional hexagonal lattice of carbon atoms and said plate having a length and a width parallel to said graphite plane and a thickness orthogonal to said graphite plane characterized in that at least one of the length, width, and thickness values is 100 nanometers or smaller..
The composite material as set forth in claim 21, wherein said nano-scaled graphene plate material is at a proportion of no more than 15% by volume.
The composite material as set forth in claim 21, wherein said matrix material is selected from the group consisting of a polymer, a metal, a ceramic, a carbon, a glass, an organic material, or a combination thereof.
Layer stacks claimed or described, ordered top of device to substrate.
nano-scaled graphene plate composite material
Materials described outside the worked examples.
precursor polymer
petroleum pitch
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
NGP plate length and width | ≤ 100 nm | nano-scaled graphene plate (NGP) |
NGP plate thickness | ≤ 100 nm |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 7,071,258Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 conceptually illustrates the configuration difference between a carbon nano-tube and a nano-scaled graphene plate.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A process for producing a nano-scaled graphene plate material comprising the steps of: a). either partially or fully carbonizing a precursor polymer or heat-treating petroleum or coal tar pitch to produce a polymeric carbon containing micron- and/or nanometer-scaled graphite crystallites with each crystallite comprising one sheet or a multiplicity of sheets of graphite plane; b). exfoliating said graphite crystallites in said polymeric carbon; and c). subjecting said polymeric carbon containing exfoliated graphite c r ystallites to a mechanical attrition treatment to produce said nano-scaled graphene plate material.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said precursor polymer, petroleum or coal tar pitch is in a fiber form.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said precursor polymer is selected from the group consisting of polyacrylonitrile and its copolymers or derivatives, phenol formaldehyde and its copolymers or derivatives, rayon and its derivatives, cellulose and its derivatives, and combinations thereof.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said step of carbonizing or heat-treating comprises a heat treatment at a temperature in the range of 300 * C to 2,500 *C.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said step of carbonizing or heat-treating comprises a heat treatment at a temperature in the range of 300 * C to 1,000 *C.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said step of exfoliating comprises contacting said polymeric carbon with an oxidizing agent selected from the group consisting of nitric acid, potassium chlorate, chromic acid, potassium permanganate, potassium chromate, potassium dichromate, perch l oric acid, phosphoric acid, sulfuric acid, trifluoroacetic acid, organic acid, and mixtures thereof.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said mechanical attrition treatment comprises a ball milling treatment of said polymeric carbon.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said mechanical attrition treatment comprises operating a high-energy planetary ball mill.
The process for producing nano-scaled graphene plate material as defined in claim 6, wherein said polymeric carbon produced in step (a) is pulverized to become small particle or short fiber segment forms prior to step (b).
(New) A nano-scaled graphene plate material comprising at least a nanometer-scaled plate with said plate comprising a sheet of graphite plane or a multiplicity of sheets of graphite plane; said graphite plane comprising a two-dimensional hexagonal lattice of carbon atoms and said plate having a length and a width parallel to said graphite plane and a thickness orthogonal to said graphite plane characterized in that the length, width, and thickness values are all smaller than 10 nanometers.
A composite material containing a matrix material and a predetermined proportion of nanoscaled graphene plate material as a reinforcement material, said nano-scaled graphene plate material comprising at least a nanometer-scaled plate with said plate comprising a sheet of graphite plane or a multiplicity of sheets of graphite plane; said graphite plane comprising a two-dimensional hexagonal lattice of carbon atoms and said plate having a length and a width parallel to said graphite plane and a thickness orthogonal to said graphite plane characterized in that at least one of the length, width, and thickness values is 100 nanometers or smaller..
The composite material as set forth in claim 21, wherein said nano-scaled graphene plate material is at a proportion of no more than 15% by volume.
The composite material as set forth in claim 21, wherein said matrix material is selected from the group consisting of a polymer, a metal, a ceramic, a carbon, a glass, an organic material, or a combination thereof.
Layer stacks claimed or described, ordered top of device to substrate.
nano-scaled graphene plate composite material
Materials described outside the worked examples.
precursor polymer
petroleum pitch
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
NGP plate length and width | ≤ 100 nm | nano-scaled graphene plate (NGP) |
NGP plate thickness | ≤ 100 nm |
Related documents with shared materials, methods, properties, or citations.
coal tar pitch
polyacrylonitrile (PAN) and its copolymers or derivatives
phenol formaldehyde and its copolymers or derivatives
rayon and its derivatives
cellulose and its derivatives
oxidizing agent (nitric acid, potassium chlorate, chromic acid, potassium permanganate, potassium chromate, potassium dichromate, perchloric acid, phosphoric acid, sulfuric acid, trifluoroacetic acid, organic acid, and mixtures thereof)
nano-scaled graphene plate (NGP)
matrix material (polymer, metal, ceramic, carbon, glass, organic material, or combination)
polymeric carbon
Pressure | 20–50 pa | — |
Temperature | 500–2500 °C | — |
Temperature | 300–1000 °C | — |
Temperature | 200–350 °C | — |
Temperature | 350–1500 °C | — |
Temperature | 1500–3000 °C | — |
Temperature | 350–900 °C | — |
Thickness | ≤ 1 mm | — |
Temperature | 1000–3000 °C | — |
METHOD OF PRODUCING GRAPHENE-CARBON HYBRID FOAM-PROTECTED ANODE ACTIVE MATERIAL COATING FOR LITHIUM-ION BATTERIES
coal tar pitch
polyacrylonitrile (PAN) and its copolymers or derivatives
phenol formaldehyde and its copolymers or derivatives
rayon and its derivatives
cellulose and its derivatives
oxidizing agent (nitric acid, potassium chlorate, chromic acid, potassium permanganate, potassium chromate, potassium dichromate, perchloric acid, phosphoric acid, sulfuric acid, trifluoroacetic acid, organic acid, and mixtures thereof)
nano-scaled graphene plate (NGP)
matrix material (polymer, metal, ceramic, carbon, glass, organic material, or combination)
polymeric carbon
Pressure | 20–50 pa | — |
Temperature | 500–2500 °C | — |
Temperature | 300–1000 °C | — |
Temperature | 200–350 °C | — |
Temperature | 350–1500 °C | — |
Temperature | 1500–3000 °C | — |
Temperature | 350–900 °C | — |
Thickness | ≤ 1 mm | — |
Temperature | 1000–3000 °C | — |
METHOD OF PRODUCING GRAPHENE-CARBON HYBRID FOAM-PROTECTED ANODE ACTIVE MATERIAL COATING FOR LITHIUM-ION BATTERIES
coal tar pitch
polyacrylonitrile (PAN) and its copolymers or derivatives
phenol formaldehyde and its copolymers or derivatives
rayon and its derivatives
cellulose and its derivatives
oxidizing agent (nitric acid, potassium chlorate, chromic acid, potassium permanganate, potassium chromate, potassium dichromate, perchloric acid, phosphoric acid, sulfuric acid, trifluoroacetic acid, organic acid, and mixtures thereof)
nano-scaled graphene plate (NGP)
matrix material (polymer, metal, ceramic, carbon, glass, organic material, or combination)
polymeric carbon
Pressure | 20–50 pa | — |
Temperature | 500–2500 °C | — |
Temperature | 300–1000 °C | — |
Temperature | 200–350 °C | — |
Temperature | 350–1500 °C | — |
Temperature | 1500–3000 °C | — |
Temperature | 350–900 °C | — |
Thickness | ≤ 1 mm | — |
Temperature | 1000–3000 °C | — |
METHOD OF PRODUCING GRAPHENE-CARBON HYBRID FOAM-PROTECTED ANODE ACTIVE MATERIAL COATING FOR LITHIUM-ION BATTERIES
coal tar pitch
polyacrylonitrile (PAN) and its copolymers or derivatives
phenol formaldehyde and its copolymers or derivatives
rayon and its derivatives
cellulose and its derivatives
oxidizing agent (nitric acid, potassium chlorate, chromic acid, potassium permanganate, potassium chromate, potassium dichromate, perchloric acid, phosphoric acid, sulfuric acid, trifluoroacetic acid, organic acid, and mixtures thereof)
nano-scaled graphene plate (NGP)
matrix material (polymer, metal, ceramic, carbon, glass, organic material, or combination)
polymeric carbon
Pressure | 20–50 pa | — |
Temperature | 500–2500 °C | — |
Temperature | 300–1000 °C | — |
Temperature | 200–350 °C | — |
Temperature | 350–1500 °C | — |
Temperature | 1500–3000 °C | — |
Temperature | 350–900 °C | — |
Thickness | ≤ 1 mm | — |
Temperature | 1000–3000 °C | — |
METHOD OF PRODUCING GRAPHENE-CARBON HYBRID FOAM-PROTECTED ANODE ACTIVE MATERIAL COATING FOR LITHIUM-ION BATTERIES