Patent
US 11,021,371HOLLOW GRAPHENE BALLS AND DEVICES CONTAINING SAME
Aruna Zhamu
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 11,021,371Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 A flow chart showing the most commonly used prior art process of producing highly oxidized NGPs that entails tedious chemical oxidation/intercalation, …
FIG. 2(B) Schematic of the heat-induced conversion of polymer into carbon, which bonds graphene sheets together to form separated, individual graphene balls.
FIG. 3 Thermal conductivity values vs. specific gravity of a carbon-bonded graphene ball compact (a foam-like structure) produced by the presently invented …
FIG. 4 Thermal conductivity values of carbon-bonded graphene ball compacts and the hydrothermally reduced GO graphene foam.
FIG. 5 Thermal conductivity values of carbon-bonded graphene ball compacts and pristine graphene foam (prepared by casting with a blowing agent and then heat …
FIG. 6 Electrical conductivity values of carbon-bonded graphene ball compacts and the hydrothermally reduced GO graphene foam.
FIG. 7 The amount of oil absorbed per gram of graphene ball compacts, plotted as a function of the oxygen content in the foam having a porosity level of …
FIG. 8 The amount of oil absorbed per gram of integral carbon-bonded graphene ball compacts, plotted as a function of the porosity level (given the same oxygen …
FIG. 9 The amount of chloroform absorbed out of a chloroform-water mixture, plotted as a function of the degree of fluorination.
FIG. 10 Schematic of heat sink structures (2 examples).
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A powder mass of multiple individual hollow graphene balls, wherein at least one of said hollow graphene balls has a graphene shell composed of graphene sheets bonded by a carbon material and a hollow core enclosed by said graphene shell, wherein said multiple individual hollow graphene balls are distinct from each other and not part of a foam. Previously presented
The powder mass of claim 1, wherein said graphene shell comprises single-layer or few-layer g raphene sheets chemically bonded by a carbon material havin g a carbon material-to-graphene weight ratio from 1/200 to 1/2. Original
The powder mass of claim 1, wherein said graphene shell comprises few-layer graphene sheets comprising 2-10 layers of stacked graphene planes having an inter-plane spacing d oo_ from 0.3354 nm to 0.36 nm as measured by X-ray diffraction. Original
The powder mass of claim 1, wherein said hollow graphene balls have a density from 0.01 to 1.7 g/cm 3. and a specific surface area from 50 to 3,000 m 2/g. Original
The powder mass of claim 1, wherein said hollow graphene balls have a specific surface area from 50 to 3.000 m'/g. Original
An oil-removing or oil-separating device containing said hollow graphene balls of claim 1 as an oil-absorbing element. Original
A solvent-removing or solvent-separating device containing said hollow graphene balls of claim 1 as a solvent-absorbing or solvent-separating element. Original
A thermal management device comprising said hollow graphene balls of claim 1 as a heat-conducting, heat spreading or heat dissipating element. Original
The powder mass of claim 1, further including individual hollow graphene balls. Previously Currently amended a binder resin that binds together the multiple presented
Canceled
Canceled
Canceled
Canceled
Layer stacks claimed or described, ordered top of device to substrate.
hollow graphene ball powder mass
oil-removing or oil-separating device
solvent-removing or solvent-separating device
Materials described outside the worked examples.
graphene sheets
carbon material (bonding carbon)
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 6 Electrical conductivity values of carbon-bonded graphene ball compacts and the hydrothermally reduced GO graphene foam.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
inter-plane spacing d002 of few-layer graphene sheets in graphene shell | 0.3354–0.36 nm | graphene sheets |
density of hollow graphene balls | 0.01–1.7 g/cm3 |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 11,021,371Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 A flow chart showing the most commonly used prior art process of producing highly oxidized NGPs that entails tedious chemical oxidation/intercalation, …
FIG. 2(B) Schematic of the heat-induced conversion of polymer into carbon, which bonds graphene sheets together to form separated, individual graphene balls.
FIG. 3 Thermal conductivity values vs. specific gravity of a carbon-bonded graphene ball compact (a foam-like structure) produced by the presently invented …
FIG. 4 Thermal conductivity values of carbon-bonded graphene ball compacts and the hydrothermally reduced GO graphene foam.
FIG. 5 Thermal conductivity values of carbon-bonded graphene ball compacts and pristine graphene foam (prepared by casting with a blowing agent and then heat …
FIG. 6 Electrical conductivity values of carbon-bonded graphene ball compacts and the hydrothermally reduced GO graphene foam.
FIG. 7 The amount of oil absorbed per gram of graphene ball compacts, plotted as a function of the oxygen content in the foam having a porosity level of …
FIG. 8 The amount of oil absorbed per gram of integral carbon-bonded graphene ball compacts, plotted as a function of the porosity level (given the same oxygen …
FIG. 9 The amount of chloroform absorbed out of a chloroform-water mixture, plotted as a function of the degree of fluorination.
FIG. 10 Schematic of heat sink structures (2 examples).
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A powder mass of multiple individual hollow graphene balls, wherein at least one of said hollow graphene balls has a graphene shell composed of graphene sheets bonded by a carbon material and a hollow core enclosed by said graphene shell, wherein said multiple individual hollow graphene balls are distinct from each other and not part of a foam. Previously presented
The powder mass of claim 1, wherein said graphene shell comprises single-layer or few-layer g raphene sheets chemically bonded by a carbon material havin g a carbon material-to-graphene weight ratio from 1/200 to 1/2. Original
The powder mass of claim 1, wherein said graphene shell comprises few-layer graphene sheets comprising 2-10 layers of stacked graphene planes having an inter-plane spacing d oo_ from 0.3354 nm to 0.36 nm as measured by X-ray diffraction. Original
The powder mass of claim 1, wherein said hollow graphene balls have a density from 0.01 to 1.7 g/cm 3. and a specific surface area from 50 to 3,000 m 2/g. Original
The powder mass of claim 1, wherein said hollow graphene balls have a specific surface area from 50 to 3.000 m'/g. Original
An oil-removing or oil-separating device containing said hollow graphene balls of claim 1 as an oil-absorbing element. Original
A solvent-removing or solvent-separating device containing said hollow graphene balls of claim 1 as a solvent-absorbing or solvent-separating element. Original
A thermal management device comprising said hollow graphene balls of claim 1 as a heat-conducting, heat spreading or heat dissipating element. Original
The powder mass of claim 1, further including individual hollow graphene balls. Previously Currently amended a binder resin that binds together the multiple presented
Canceled
Canceled
Canceled
Canceled
Layer stacks claimed or described, ordered top of device to substrate.
hollow graphene ball powder mass
oil-removing or oil-separating device
solvent-removing or solvent-separating device
Materials described outside the worked examples.
graphene sheets
carbon material (bonding carbon)
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 6 Electrical conductivity values of carbon-bonded graphene ball compacts and the hydrothermally reduced GO graphene foam.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
inter-plane spacing d002 of few-layer graphene sheets in graphene shell | 0.3354–0.36 nm | graphene sheets |
density of hollow graphene balls | 0.01–1.7 g/cm3 |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 11,021,371Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 A flow chart showing the most commonly used prior art process of producing highly oxidized NGPs that entails tedious chemical oxidation/intercalation, …
FIG. 2(B) Schematic of the heat-induced conversion of polymer into carbon, which bonds graphene sheets together to form separated, individual graphene balls.
FIG. 3 Thermal conductivity values vs. specific gravity of a carbon-bonded graphene ball compact (a foam-like structure) produced by the presently invented …
FIG. 4 Thermal conductivity values of carbon-bonded graphene ball compacts and the hydrothermally reduced GO graphene foam.
FIG. 5 Thermal conductivity values of carbon-bonded graphene ball compacts and pristine graphene foam (prepared by casting with a blowing agent and then heat …
FIG. 6 Electrical conductivity values of carbon-bonded graphene ball compacts and the hydrothermally reduced GO graphene foam.
FIG. 7 The amount of oil absorbed per gram of graphene ball compacts, plotted as a function of the oxygen content in the foam having a porosity level of …
FIG. 8 The amount of oil absorbed per gram of integral carbon-bonded graphene ball compacts, plotted as a function of the porosity level (given the same oxygen …
FIG. 9 The amount of chloroform absorbed out of a chloroform-water mixture, plotted as a function of the degree of fluorination.
FIG. 10 Schematic of heat sink structures (2 examples).
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A powder mass of multiple individual hollow graphene balls, wherein at least one of said hollow graphene balls has a graphene shell composed of graphene sheets bonded by a carbon material and a hollow core enclosed by said graphene shell, wherein said multiple individual hollow graphene balls are distinct from each other and not part of a foam. Previously presented
The powder mass of claim 1, wherein said graphene shell comprises single-layer or few-layer g raphene sheets chemically bonded by a carbon material havin g a carbon material-to-graphene weight ratio from 1/200 to 1/2. Original
The powder mass of claim 1, wherein said graphene shell comprises few-layer graphene sheets comprising 2-10 layers of stacked graphene planes having an inter-plane spacing d oo_ from 0.3354 nm to 0.36 nm as measured by X-ray diffraction. Original
The powder mass of claim 1, wherein said hollow graphene balls have a density from 0.01 to 1.7 g/cm 3. and a specific surface area from 50 to 3,000 m 2/g. Original
The powder mass of claim 1, wherein said hollow graphene balls have a specific surface area from 50 to 3.000 m'/g. Original
An oil-removing or oil-separating device containing said hollow graphene balls of claim 1 as an oil-absorbing element. Original
A solvent-removing or solvent-separating device containing said hollow graphene balls of claim 1 as a solvent-absorbing or solvent-separating element. Original
A thermal management device comprising said hollow graphene balls of claim 1 as a heat-conducting, heat spreading or heat dissipating element. Original
The powder mass of claim 1, further including individual hollow graphene balls. Previously Currently amended a binder resin that binds together the multiple presented
Canceled
Canceled
Canceled
Canceled
Layer stacks claimed or described, ordered top of device to substrate.
hollow graphene ball powder mass
oil-removing or oil-separating device
solvent-removing or solvent-separating device
Materials described outside the worked examples.
graphene sheets
carbon material (bonding carbon)
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 6 Electrical conductivity values of carbon-bonded graphene ball compacts and the hydrothermally reduced GO graphene foam.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
inter-plane spacing d002 of few-layer graphene sheets in graphene shell | 0.3354–0.36 nm | graphene sheets |
density of hollow graphene balls | 0.01–1.7 g/cm3 |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 11,021,371Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 A flow chart showing the most commonly used prior art process of producing highly oxidized NGPs that entails tedious chemical oxidation/intercalation, …
FIG. 2(B) Schematic of the heat-induced conversion of polymer into carbon, which bonds graphene sheets together to form separated, individual graphene balls.
FIG. 3 Thermal conductivity values vs. specific gravity of a carbon-bonded graphene ball compact (a foam-like structure) produced by the presently invented …
FIG. 4 Thermal conductivity values of carbon-bonded graphene ball compacts and the hydrothermally reduced GO graphene foam.
FIG. 5 Thermal conductivity values of carbon-bonded graphene ball compacts and pristine graphene foam (prepared by casting with a blowing agent and then heat …
FIG. 6 Electrical conductivity values of carbon-bonded graphene ball compacts and the hydrothermally reduced GO graphene foam.
FIG. 7 The amount of oil absorbed per gram of graphene ball compacts, plotted as a function of the oxygen content in the foam having a porosity level of …
FIG. 8 The amount of oil absorbed per gram of integral carbon-bonded graphene ball compacts, plotted as a function of the porosity level (given the same oxygen …
FIG. 9 The amount of chloroform absorbed out of a chloroform-water mixture, plotted as a function of the degree of fluorination.
FIG. 10 Schematic of heat sink structures (2 examples).
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A powder mass of multiple individual hollow graphene balls, wherein at least one of said hollow graphene balls has a graphene shell composed of graphene sheets bonded by a carbon material and a hollow core enclosed by said graphene shell, wherein said multiple individual hollow graphene balls are distinct from each other and not part of a foam. Previously presented
The powder mass of claim 1, wherein said graphene shell comprises single-layer or few-layer g raphene sheets chemically bonded by a carbon material havin g a carbon material-to-graphene weight ratio from 1/200 to 1/2. Original
The powder mass of claim 1, wherein said graphene shell comprises few-layer graphene sheets comprising 2-10 layers of stacked graphene planes having an inter-plane spacing d oo_ from 0.3354 nm to 0.36 nm as measured by X-ray diffraction. Original
The powder mass of claim 1, wherein said hollow graphene balls have a density from 0.01 to 1.7 g/cm 3. and a specific surface area from 50 to 3,000 m 2/g. Original
The powder mass of claim 1, wherein said hollow graphene balls have a specific surface area from 50 to 3.000 m'/g. Original
An oil-removing or oil-separating device containing said hollow graphene balls of claim 1 as an oil-absorbing element. Original
A solvent-removing or solvent-separating device containing said hollow graphene balls of claim 1 as a solvent-absorbing or solvent-separating element. Original
A thermal management device comprising said hollow graphene balls of claim 1 as a heat-conducting, heat spreading or heat dissipating element. Original
The powder mass of claim 1, further including individual hollow graphene balls. Previously Currently amended a binder resin that binds together the multiple presented
Canceled
Canceled
Canceled
Canceled
Layer stacks claimed or described, ordered top of device to substrate.
hollow graphene ball powder mass
oil-removing or oil-separating device
solvent-removing or solvent-separating device
Materials described outside the worked examples.
graphene sheets
carbon material (bonding carbon)
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 6 Electrical conductivity values of carbon-bonded graphene ball compacts and the hydrothermally reduced GO graphene foam.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
inter-plane spacing d002 of few-layer graphene sheets in graphene shell | 0.3354–0.36 nm | graphene sheets |
density of hollow graphene balls | 0.01–1.7 g/cm3 |
Related documents with shared materials, methods, properties, or citations.
thermal management device
binder resin
graphitic material
solid polymer carrier material
high carbon-yield polymer
low carbon-yield polymer
specific surface area of hollow graphene balls | 50–3000 m2/g | graphene sheets |
Temperature | 1500–2500 °C | — |
Thickness | 0.3354–0.4 nm | — |
Thickness | 2–50 nm | — |
Thickness | 0.3345–0.4 nm | — |
Duration | 0.5–5 minutes | — |
— | 250–500 W | — |
Temperature | 300–2500 °C | — |
Temperature | 300–1500 °C | — |
Duration | 0.5–5 hours | — |
Thickness | 0.2–2 mm | — |
Duration | 10–120 minutes | — |
Duration | 2–48 hours | — |
Thickness | ≤ 0.344 nm | — |
Temperature | ≤ 2500 °C | — |
Thickness | ≤ 2 nm | — |
Thickness | ≥ 20 nm | — |
Thickness | ≥ 1 nm | — |
— | ≥ 200 W | — |
Thickness | 10–10000000 nm | — |
Thickness | 100–1000000 nm | — |
Temperature | 200–2500 °C | — |
Temperature | 2500–3200 °C | — |
thermal management device
binder resin
graphitic material
solid polymer carrier material
high carbon-yield polymer
low carbon-yield polymer
specific surface area of hollow graphene balls | 50–3000 m2/g | graphene sheets |
Temperature | 1500–2500 °C | — |
Thickness | 0.3354–0.4 nm | — |
Thickness | 2–50 nm | — |
Thickness | 0.3345–0.4 nm | — |
Duration | 0.5–5 minutes | — |
— | 250–500 W | — |
Temperature | 300–2500 °C | — |
Temperature | 300–1500 °C | — |
Duration | 0.5–5 hours | — |
Thickness | 0.2–2 mm | — |
Duration | 10–120 minutes | — |
Duration | 2–48 hours | — |
Thickness | ≤ 0.344 nm | — |
Temperature | ≤ 2500 °C | — |
Thickness | ≤ 2 nm | — |
Thickness | ≥ 20 nm | — |
Thickness | ≥ 1 nm | — |
— | ≥ 200 W | — |
Thickness | 10–10000000 nm | — |
Thickness | 100–1000000 nm | — |
Temperature | 200–2500 °C | — |
Temperature | 2500–3200 °C | — |
thermal management device
binder resin
graphitic material
solid polymer carrier material
high carbon-yield polymer
low carbon-yield polymer
specific surface area of hollow graphene balls | 50–3000 m2/g | graphene sheets |
Temperature | 1500–2500 °C | — |
Thickness | 0.3354–0.4 nm | — |
Thickness | 2–50 nm | — |
Thickness | 0.3345–0.4 nm | — |
Duration | 0.5–5 minutes | — |
— | 250–500 W | — |
Temperature | 300–2500 °C | — |
Temperature | 300–1500 °C | — |
Duration | 0.5–5 hours | — |
Thickness | 0.2–2 mm | — |
Duration | 10–120 minutes | — |
Duration | 2–48 hours | — |
Thickness | ≤ 0.344 nm | — |
Temperature | ≤ 2500 °C | — |
Thickness | ≤ 2 nm | — |
Thickness | ≥ 20 nm | — |
Thickness | ≥ 1 nm | — |
— | ≥ 200 W | — |
Thickness | 10–10000000 nm | — |
Thickness | 100–1000000 nm | — |
Temperature | 200–2500 °C | — |
Temperature | 2500–3200 °C | — |
thermal management device
binder resin
graphitic material
solid polymer carrier material
high carbon-yield polymer
low carbon-yield polymer
specific surface area of hollow graphene balls | 50–3000 m2/g | graphene sheets |
Temperature | 1500–2500 °C | — |
Thickness | 0.3354–0.4 nm | — |
Thickness | 2–50 nm | — |
Thickness | 0.3345–0.4 nm | — |
Duration | 0.5–5 minutes | — |
— | 250–500 W | — |
Temperature | 300–2500 °C | — |
Temperature | 300–1500 °C | — |
Duration | 0.5–5 hours | — |
Thickness | 0.2–2 mm | — |
Duration | 10–120 minutes | — |
Duration | 2–48 hours | — |
Thickness | ≤ 0.344 nm | — |
Temperature | ≤ 2500 °C | — |
Thickness | ≤ 2 nm | — |
Thickness | ≥ 20 nm | — |
Thickness | ≥ 1 nm | — |
— | ≥ 200 W | — |
Thickness | 10–10000000 nm | — |
Thickness | 100–1000000 nm | — |
Temperature | 200–2500 °C | — |
Temperature | 2500–3200 °C | — |