Patent
US 8,858,776PREPARATION OF GRAPHENE SHEETS
Lain-Jong Li
US
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Patent
Atlas literature
Patent
US 8,858,776Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 a is a schematic illustration and photo for electrochemical exfoliation of graphite; Figure l b includes two photos of the graphite flakes before and after 15 electrochemical exfoliation, respectively; and Figure lc is a photo of the dispersed graphene sheets in a DMF solution. Figure 2a is …
Figure 5 a is an image of a cast thin-conducting electrode on a quartz substrate; and
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
PATENTS 21 8048-0252 26A-1000217 AMENDMENTS TO THE CLAIMS This listing o f claims replaces all prior versions and listings of claims in the application: Listing of claims 1. A method of preparing graphene sheets, the method comprising: immersing, in a solution containing an electrolyte, a portion of a first electrode and a portion of a second electrode, the immersed portion of the first electrode including a first graphite-containing material and the immersed portion of the second electrode including a second graphite-containing material or a metal; causing an alternating potential to exist between the first and second electrodes; and recovering, from the solution, graphene sheets exfoliated from the first and/or second graphite-containing material(s), wherein the electrolyte is an anionic surfactant selected from the group consisting of, a lk ylsulfonate, sodium alkane sulfonate, sodium benzenesulfonate, sodium dodecylbenzenesulfonate, ammonium lauryl sulfate, potassium lauryl sulfate, sodium m y reth sulfate, sodium dodecyl sulfate, sodium laureth sulfate, sodium pareth sulfate, dioctyl sodium sulfosuccinate, perfluorobutanesulfonic acid, perfluorooctanesulfonic acid, perfluorononanoic acid, perfluorooctanoic acid, sodium palmate, sodium stearate, and sodium tallowate a ca anionic u SVG 13170624.06-09-2014.HW₈BHWCYPXXIFW3.CLM.1.svg 0.16 2.95 Black and white 2-6.
The method of claim 1, wherein the electrolyte in the solution is an acid.
The method of claim 1, wherein each of the first graphite-containing material and the second graphite-containing material, independently, is natural graphite flakes, artificial graphite, highly oriented pyrolytic graphite, polyacrylonitrile fiber-based graphite, or pitch-based graphite.
The method of claim 1, wherein the second electrode is a metal wire.
The method of claim 1, wherein the second electrode includes a second graphite-containing material.
The method of claim 1, wherein the alternating potential has alternating voltages in a waveform having an amplitude value of 0.1 to 250 V, and in a time span of 1 second to 1 week.
The method of claim 1, wherein the recovering step includes collecting the graphene sheets on a filter, and washing the graphene sheets on the filter.
The method of claim 1, after the recovering step, further comprising: drying the graphene sheets, redispersing the graphene sheets in an organic solvent to form a suspension, centrifuging at a pre-determined speed the suspension to obtain a supernatant containing the graphene sheets, and collecting the graphene sheets on a filter or by a reducing pressure concentration method.
canceled
A method of preparing a graphene film electrode, the method comprising: dissolving graphene sheets in an organic solvent to form a solution, applying the solution on a substrate, adding deionized water to the solution on the substrate so that a graphene film is formed, and drying the graphene film. withdrawn
The method of claim 28, after the drying step, further comprising heating the graphene film to remove the residual organic solvent and water. withdrawn
Layer stacks claimed or described, ordered top of device to substrate.
graphene film electrode
Materials described outside the worked examples.
graphene sheets
graphite-containing material (first/second electrode)
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Uv Vis Transmittance At Wavelength | 96 % | graphene sheets |
Fet Sheet Resistance |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 8,858,776Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 a is a schematic illustration and photo for electrochemical exfoliation of graphite; Figure l b includes two photos of the graphite flakes before and after 15 electrochemical exfoliation, respectively; and Figure lc is a photo of the dispersed graphene sheets in a DMF solution. Figure 2a is …
Figure 5 a is an image of a cast thin-conducting electrode on a quartz substrate; and
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
PATENTS 21 8048-0252 26A-1000217 AMENDMENTS TO THE CLAIMS This listing o f claims replaces all prior versions and listings of claims in the application: Listing of claims 1. A method of preparing graphene sheets, the method comprising: immersing, in a solution containing an electrolyte, a portion of a first electrode and a portion of a second electrode, the immersed portion of the first electrode including a first graphite-containing material and the immersed portion of the second electrode including a second graphite-containing material or a metal; causing an alternating potential to exist between the first and second electrodes; and recovering, from the solution, graphene sheets exfoliated from the first and/or second graphite-containing material(s), wherein the electrolyte is an anionic surfactant selected from the group consisting of, a lk ylsulfonate, sodium alkane sulfonate, sodium benzenesulfonate, sodium dodecylbenzenesulfonate, ammonium lauryl sulfate, potassium lauryl sulfate, sodium m y reth sulfate, sodium dodecyl sulfate, sodium laureth sulfate, sodium pareth sulfate, dioctyl sodium sulfosuccinate, perfluorobutanesulfonic acid, perfluorooctanesulfonic acid, perfluorononanoic acid, perfluorooctanoic acid, sodium palmate, sodium stearate, and sodium tallowate a ca anionic u SVG 13170624.06-09-2014.HW₈BHWCYPXXIFW3.CLM.1.svg 0.16 2.95 Black and white 2-6.
The method of claim 1, wherein the electrolyte in the solution is an acid.
The method of claim 1, wherein each of the first graphite-containing material and the second graphite-containing material, independently, is natural graphite flakes, artificial graphite, highly oriented pyrolytic graphite, polyacrylonitrile fiber-based graphite, or pitch-based graphite.
The method of claim 1, wherein the second electrode is a metal wire.
The method of claim 1, wherein the second electrode includes a second graphite-containing material.
The method of claim 1, wherein the alternating potential has alternating voltages in a waveform having an amplitude value of 0.1 to 250 V, and in a time span of 1 second to 1 week.
The method of claim 1, wherein the recovering step includes collecting the graphene sheets on a filter, and washing the graphene sheets on the filter.
The method of claim 1, after the recovering step, further comprising: drying the graphene sheets, redispersing the graphene sheets in an organic solvent to form a suspension, centrifuging at a pre-determined speed the suspension to obtain a supernatant containing the graphene sheets, and collecting the graphene sheets on a filter or by a reducing pressure concentration method.
canceled
A method of preparing a graphene film electrode, the method comprising: dissolving graphene sheets in an organic solvent to form a solution, applying the solution on a substrate, adding deionized water to the solution on the substrate so that a graphene film is formed, and drying the graphene film. withdrawn
The method of claim 28, after the drying step, further comprising heating the graphene film to remove the residual organic solvent and water. withdrawn
Layer stacks claimed or described, ordered top of device to substrate.
graphene film electrode
Materials described outside the worked examples.
graphene sheets
graphite-containing material (first/second electrode)
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Uv Vis Transmittance At Wavelength | 96 % | graphene sheets |
Fet Sheet Resistance |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 8,858,776Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 a is a schematic illustration and photo for electrochemical exfoliation of graphite; Figure l b includes two photos of the graphite flakes before and after 15 electrochemical exfoliation, respectively; and Figure lc is a photo of the dispersed graphene sheets in a DMF solution. Figure 2a is …
Figure 5 a is an image of a cast thin-conducting electrode on a quartz substrate; and
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
PATENTS 21 8048-0252 26A-1000217 AMENDMENTS TO THE CLAIMS This listing o f claims replaces all prior versions and listings of claims in the application: Listing of claims 1. A method of preparing graphene sheets, the method comprising: immersing, in a solution containing an electrolyte, a portion of a first electrode and a portion of a second electrode, the immersed portion of the first electrode including a first graphite-containing material and the immersed portion of the second electrode including a second graphite-containing material or a metal; causing an alternating potential to exist between the first and second electrodes; and recovering, from the solution, graphene sheets exfoliated from the first and/or second graphite-containing material(s), wherein the electrolyte is an anionic surfactant selected from the group consisting of, a lk ylsulfonate, sodium alkane sulfonate, sodium benzenesulfonate, sodium dodecylbenzenesulfonate, ammonium lauryl sulfate, potassium lauryl sulfate, sodium m y reth sulfate, sodium dodecyl sulfate, sodium laureth sulfate, sodium pareth sulfate, dioctyl sodium sulfosuccinate, perfluorobutanesulfonic acid, perfluorooctanesulfonic acid, perfluorononanoic acid, perfluorooctanoic acid, sodium palmate, sodium stearate, and sodium tallowate a ca anionic u SVG 13170624.06-09-2014.HW₈BHWCYPXXIFW3.CLM.1.svg 0.16 2.95 Black and white 2-6.
The method of claim 1, wherein the electrolyte in the solution is an acid.
The method of claim 1, wherein each of the first graphite-containing material and the second graphite-containing material, independently, is natural graphite flakes, artificial graphite, highly oriented pyrolytic graphite, polyacrylonitrile fiber-based graphite, or pitch-based graphite.
The method of claim 1, wherein the second electrode is a metal wire.
The method of claim 1, wherein the second electrode includes a second graphite-containing material.
The method of claim 1, wherein the alternating potential has alternating voltages in a waveform having an amplitude value of 0.1 to 250 V, and in a time span of 1 second to 1 week.
The method of claim 1, wherein the recovering step includes collecting the graphene sheets on a filter, and washing the graphene sheets on the filter.
The method of claim 1, after the recovering step, further comprising: drying the graphene sheets, redispersing the graphene sheets in an organic solvent to form a suspension, centrifuging at a pre-determined speed the suspension to obtain a supernatant containing the graphene sheets, and collecting the graphene sheets on a filter or by a reducing pressure concentration method.
canceled
A method of preparing a graphene film electrode, the method comprising: dissolving graphene sheets in an organic solvent to form a solution, applying the solution on a substrate, adding deionized water to the solution on the substrate so that a graphene film is formed, and drying the graphene film. withdrawn
The method of claim 28, after the drying step, further comprising heating the graphene film to remove the residual organic solvent and water. withdrawn
Layer stacks claimed or described, ordered top of device to substrate.
graphene film electrode
Materials described outside the worked examples.
graphene sheets
graphite-containing material (first/second electrode)
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Uv Vis Transmittance At Wavelength | 96 % | graphene sheets |
Fet Sheet Resistance |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 8,858,776Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 a is a schematic illustration and photo for electrochemical exfoliation of graphite; Figure l b includes two photos of the graphite flakes before and after 15 electrochemical exfoliation, respectively; and Figure lc is a photo of the dispersed graphene sheets in a DMF solution. Figure 2a is …
Figure 5 a is an image of a cast thin-conducting electrode on a quartz substrate; and
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
PATENTS 21 8048-0252 26A-1000217 AMENDMENTS TO THE CLAIMS This listing o f claims replaces all prior versions and listings of claims in the application: Listing of claims 1. A method of preparing graphene sheets, the method comprising: immersing, in a solution containing an electrolyte, a portion of a first electrode and a portion of a second electrode, the immersed portion of the first electrode including a first graphite-containing material and the immersed portion of the second electrode including a second graphite-containing material or a metal; causing an alternating potential to exist between the first and second electrodes; and recovering, from the solution, graphene sheets exfoliated from the first and/or second graphite-containing material(s), wherein the electrolyte is an anionic surfactant selected from the group consisting of, a lk ylsulfonate, sodium alkane sulfonate, sodium benzenesulfonate, sodium dodecylbenzenesulfonate, ammonium lauryl sulfate, potassium lauryl sulfate, sodium m y reth sulfate, sodium dodecyl sulfate, sodium laureth sulfate, sodium pareth sulfate, dioctyl sodium sulfosuccinate, perfluorobutanesulfonic acid, perfluorooctanesulfonic acid, perfluorononanoic acid, perfluorooctanoic acid, sodium palmate, sodium stearate, and sodium tallowate a ca anionic u SVG 13170624.06-09-2014.HW₈BHWCYPXXIFW3.CLM.1.svg 0.16 2.95 Black and white 2-6.
The method of claim 1, wherein the electrolyte in the solution is an acid.
The method of claim 1, wherein each of the first graphite-containing material and the second graphite-containing material, independently, is natural graphite flakes, artificial graphite, highly oriented pyrolytic graphite, polyacrylonitrile fiber-based graphite, or pitch-based graphite.
The method of claim 1, wherein the second electrode is a metal wire.
The method of claim 1, wherein the second electrode includes a second graphite-containing material.
The method of claim 1, wherein the alternating potential has alternating voltages in a waveform having an amplitude value of 0.1 to 250 V, and in a time span of 1 second to 1 week.
The method of claim 1, wherein the recovering step includes collecting the graphene sheets on a filter, and washing the graphene sheets on the filter.
The method of claim 1, after the recovering step, further comprising: drying the graphene sheets, redispersing the graphene sheets in an organic solvent to form a suspension, centrifuging at a pre-determined speed the suspension to obtain a supernatant containing the graphene sheets, and collecting the graphene sheets on a filter or by a reducing pressure concentration method.
canceled
A method of preparing a graphene film electrode, the method comprising: dissolving graphene sheets in an organic solvent to form a solution, applying the solution on a substrate, adding deionized water to the solution on the substrate so that a graphene film is formed, and drying the graphene film. withdrawn
The method of claim 28, after the drying step, further comprising heating the graphene film to remove the residual organic solvent and water. withdrawn
Layer stacks claimed or described, ordered top of device to substrate.
graphene film electrode
Materials described outside the worked examples.
graphene sheets
graphite-containing material (first/second electrode)
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Uv Vis Transmittance At Wavelength | 96 % | graphene sheets |
Fet Sheet Resistance |
Related documents with shared materials, methods, properties, or citations.
anionic surfactant electrolyte
sulfuric acid
H₂SO₄
p-toluenesulfonic acid
potassium hydroxide
KOH
sodium hydroxide
NaOH
lithium hydroxide
LiOH
natural graphite flakes
artificial graphite
highly oriented pyrolytic graphite
polyacrylonitrile fiber-based graphite
pitch-based graphite
organic solvent
sodium dodecyl sulfate
sodium dodecylbenzenesulfonate
N-methyl-2-pyrrolidinone
dimethylformamide
TCNQ
PEDOT:PSS
F₄-TCNQ
| <1 kΩ/sq |
graphene sheets |
Thickness | 0.9–1.2 nm | — |
Thickness | 5.5–17 cm | — |
Thickness | 1.5–2 nm | — |
Thickness | 1.4–1.6 nm | — |
Thickness | 0.7–100 nm | — |
Thickness | 0.8–1.6 nm | — |
Thickness | 0.8–2 nm | — |
Thickness | 5–20 mm | — |
Thickness | 0.3–0.6 mm | — |
Thickness | 3000–3500 cm | — |
Thickness | 0.1–1 cm | — |
Temperature | 10–120 °C | — |
Temperature | 15–60 °C | — |
Temperature | 20–30 °C | — |
Duration | 1–10800 s | — |
Voltage | 0.1–250 V | — |
Voltage | 2–250 V | — |
Voltage | 0.5–10 V | — |
Voltage | 1–6 V | — |
Voltage | 1–15 V | — |
Voltage | 3–10 V | — |
Voltage | 1–2.5 V | — |
Voltage | 2–20 V | — |
Voltage | 5–15 V | — |
Duration | 0.5–6 hours | — |
Duration | 1–3 hours | — |
Temperature | 25–150 °C | — |
Temperature | 40–120 °C | — |
Temperature | 60–100 °C | — |
Pressure | 0.5–700 Torr | — |
Pressure | 10–600 Torr | — |
Pressure | 100–500 Torr | — |
Temperature | 150–900 °C | — |
Temperature | 250–700 °C | — |
Temperature | 350–550 °C | — |
Copper-reduced graphene oxide core-shell transparent conductor for controlling light transmission and method of making the same
anionic surfactant electrolyte
sulfuric acid
H₂SO₄
p-toluenesulfonic acid
potassium hydroxide
KOH
sodium hydroxide
NaOH
lithium hydroxide
LiOH
natural graphite flakes
artificial graphite
highly oriented pyrolytic graphite
polyacrylonitrile fiber-based graphite
pitch-based graphite
organic solvent
sodium dodecyl sulfate
sodium dodecylbenzenesulfonate
N-methyl-2-pyrrolidinone
dimethylformamide
TCNQ
PEDOT:PSS
F₄-TCNQ
| <1 kΩ/sq |
graphene sheets |
Thickness | 0.9–1.2 nm | — |
Thickness | 5.5–17 cm | — |
Thickness | 1.5–2 nm | — |
Thickness | 1.4–1.6 nm | — |
Thickness | 0.7–100 nm | — |
Thickness | 0.8–1.6 nm | — |
Thickness | 0.8–2 nm | — |
Thickness | 5–20 mm | — |
Thickness | 0.3–0.6 mm | — |
Thickness | 3000–3500 cm | — |
Thickness | 0.1–1 cm | — |
Temperature | 10–120 °C | — |
Temperature | 15–60 °C | — |
Temperature | 20–30 °C | — |
Duration | 1–10800 s | — |
Voltage | 0.1–250 V | — |
Voltage | 2–250 V | — |
Voltage | 0.5–10 V | — |
Voltage | 1–6 V | — |
Voltage | 1–15 V | — |
Voltage | 3–10 V | — |
Voltage | 1–2.5 V | — |
Voltage | 2–20 V | — |
Voltage | 5–15 V | — |
Duration | 0.5–6 hours | — |
Duration | 1–3 hours | — |
Temperature | 25–150 °C | — |
Temperature | 40–120 °C | — |
Temperature | 60–100 °C | — |
Pressure | 0.5–700 Torr | — |
Pressure | 10–600 Torr | — |
Pressure | 100–500 Torr | — |
Temperature | 150–900 °C | — |
Temperature | 250–700 °C | — |
Temperature | 350–550 °C | — |
Copper-reduced graphene oxide core-shell transparent conductor for controlling light transmission and method of making the same
anionic surfactant electrolyte
sulfuric acid
H₂SO₄
p-toluenesulfonic acid
potassium hydroxide
KOH
sodium hydroxide
NaOH
lithium hydroxide
LiOH
natural graphite flakes
artificial graphite
highly oriented pyrolytic graphite
polyacrylonitrile fiber-based graphite
pitch-based graphite
organic solvent
sodium dodecyl sulfate
sodium dodecylbenzenesulfonate
N-methyl-2-pyrrolidinone
dimethylformamide
TCNQ
PEDOT:PSS
F₄-TCNQ
| <1 kΩ/sq |
graphene sheets |
Thickness | 0.9–1.2 nm | — |
Thickness | 5.5–17 cm | — |
Thickness | 1.5–2 nm | — |
Thickness | 1.4–1.6 nm | — |
Thickness | 0.7–100 nm | — |
Thickness | 0.8–1.6 nm | — |
Thickness | 0.8–2 nm | — |
Thickness | 5–20 mm | — |
Thickness | 0.3–0.6 mm | — |
Thickness | 3000–3500 cm | — |
Thickness | 0.1–1 cm | — |
Temperature | 10–120 °C | — |
Temperature | 15–60 °C | — |
Temperature | 20–30 °C | — |
Duration | 1–10800 s | — |
Voltage | 0.1–250 V | — |
Voltage | 2–250 V | — |
Voltage | 0.5–10 V | — |
Voltage | 1–6 V | — |
Voltage | 1–15 V | — |
Voltage | 3–10 V | — |
Voltage | 1–2.5 V | — |
Voltage | 2–20 V | — |
Voltage | 5–15 V | — |
Duration | 0.5–6 hours | — |
Duration | 1–3 hours | — |
Temperature | 25–150 °C | — |
Temperature | 40–120 °C | — |
Temperature | 60–100 °C | — |
Pressure | 0.5–700 Torr | — |
Pressure | 10–600 Torr | — |
Pressure | 100–500 Torr | — |
Temperature | 150–900 °C | — |
Temperature | 250–700 °C | — |
Temperature | 350–550 °C | — |
Copper-reduced graphene oxide core-shell transparent conductor for controlling light transmission and method of making the same
anionic surfactant electrolyte
sulfuric acid
H₂SO₄
p-toluenesulfonic acid
potassium hydroxide
KOH
sodium hydroxide
NaOH
lithium hydroxide
LiOH
natural graphite flakes
artificial graphite
highly oriented pyrolytic graphite
polyacrylonitrile fiber-based graphite
pitch-based graphite
organic solvent
sodium dodecyl sulfate
sodium dodecylbenzenesulfonate
N-methyl-2-pyrrolidinone
dimethylformamide
TCNQ
PEDOT:PSS
F₄-TCNQ
| <1 kΩ/sq |
graphene sheets |
Thickness | 0.9–1.2 nm | — |
Thickness | 5.5–17 cm | — |
Thickness | 1.5–2 nm | — |
Thickness | 1.4–1.6 nm | — |
Thickness | 0.7–100 nm | — |
Thickness | 0.8–1.6 nm | — |
Thickness | 0.8–2 nm | — |
Thickness | 5–20 mm | — |
Thickness | 0.3–0.6 mm | — |
Thickness | 3000–3500 cm | — |
Thickness | 0.1–1 cm | — |
Temperature | 10–120 °C | — |
Temperature | 15–60 °C | — |
Temperature | 20–30 °C | — |
Duration | 1–10800 s | — |
Voltage | 0.1–250 V | — |
Voltage | 2–250 V | — |
Voltage | 0.5–10 V | — |
Voltage | 1–6 V | — |
Voltage | 1–15 V | — |
Voltage | 3–10 V | — |
Voltage | 1–2.5 V | — |
Voltage | 2–20 V | — |
Voltage | 5–15 V | — |
Duration | 0.5–6 hours | — |
Duration | 1–3 hours | — |
Temperature | 25–150 °C | — |
Temperature | 40–120 °C | — |
Temperature | 60–100 °C | — |
Pressure | 0.5–700 Torr | — |
Pressure | 10–600 Torr | — |
Pressure | 100–500 Torr | — |
Temperature | 150–900 °C | — |
Temperature | 250–700 °C | — |
Temperature | 350–550 °C | — |
Copper-reduced graphene oxide core-shell transparent conductor for controlling light transmission and method of making the same