Patent
US 9,950,930of Invention
Kwang Hyun Yoo
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 9,950,930Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is an outlined schematic view showing a principle of high pressure homogenizer usable in a preparation method of graphene of an exemplary embodiment. …
FIGS. 2A and 2B (enlarged views), it was confirmed that the pitch includes polyaromatic hydrocarbons having a molecular weight of 200 to 1500, and especially, …
FIGS. 3A and 3B (enlarged views in the range of molecular weight of 400 to 500). The analysis was carried out by adding the pitch or the dispersant to a …
FIG. 4, a carbon-derived peak of the aromatic hydrocarbons, and a carbon-derived peak of some aliphatic hydrocarbons were confirmed in the pitch, but the …
FIG. 5 is a drawing showing the analysis results, after analyzing pitch and a dispersant of Preparation Example 1 by a FT-IR, respectively.
FIG. 6, it was confirmed that as the oxidation time increases, the content of the components having a molecular weight more than about 1000, or about 700 …
FIG. 7, it was confirmed that the graphene flake having a small thickness and a large area, and with minimized defects was formed very well. The graphene flake of …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 9, it was confirmed that a thin and uniform graphene flake having an area of about 5 pm2 was formed very well. Example 4: Preparation of graphene flake The …
FIG. 10, it was confirmed that a thin and uniform graphene flake having an area of about 5 pm2 was formed very well. Comparative Exam p le 1: Preparation of …
FIG. 11, the graphene flake prepared in Example 1 shows an area of 10 pm2 or more which is larger than that of the graphene flake of Comparative Example 1, and …
FIG. 12 is a Raman spectrum of the graphene flake of Example 1. In the Raman spectrum, a D peak (at ~ 1,350 cm- 1) intensity is correspondingly increased as the …
FIG. 13 shows an electron micrograph of the oxidized graphene flake 33 which was exfoliated using oxidized graphite. Further, referring to the Raman spectrum of
FIG. 14, it shows an oxygen content of about 9.46%, which is in a very high level, as compared with the unoxidized graphite or graphene showing an oxygen …
FIG. 15, it was confirmed that a D -peak of about 1350 cm- 1 is much larger than the result obtained from the graphene flake and the like of the Examples, which …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A preparation method of graphene, the preparation method comprising: form ing a _ dispersion including a carbon-based material including unoxidized graphite, and a dispersant; and continuously passing the dispersion through a high pressure homogenizer including an inlet, an outlet, and a micro-channel for connection between the inlet and the outlet, having a diameter in a micrometer scale, wherein the carbon-based material is exfoliated, as the material is passed through the micro-channel under application of a shear force, thereby forming graphene having a thickness in nanoscale, and wherein the dispersant includes a mixture of a plurality of polyaromatic hydrocarbon oxides, including polyaromatic hydrocarbon oxides having a molecular weight of 300 to 1000, said dispersant being present in an amount of at least 60% by weight. Currently amended
The preparation method of claim 1, wherein the unoxidized graphite has an element ratio of oxygen to carbon (O/C atomic ratio) of 5% or less, as measured by elemental analysis measurement by combustion or XPS analysis (X-ray photoelectron spectrometry analysis). Original
The preparation method of claim 1, wherein the unoxidized graphite includes planar graphite. Original
The method of claim 1, wherein the dispersion is dispersion in which the carbon-based material and the dispersant are dissolved or dispersed in an aqueous solvent or a polar organic solvent. Original
The preparation method of claim 1, wherein the micro-channel has a diameter of 10 to 800 m. Original
The preparation method of claim 1, wherein the dispersion is introduced to the inlet of the high pressure homogenizer under application of pressure of 100 to 3000 bar to be passed through the micro-channel. Original
The preparation method of claim 1, wherein the graphene includes a graphene flake having a thickness of 0.3 to 50 nm. Original
The preparation method of claim 1, further comprising recovering graphene flakes from dispersion of the graphene flakes, and drying the graphene flakes. Original
Canceled
The preparation method of claim 51, wherein the dispersant has an oxygen content of 12 to 50% by weight, based on a total element content, when the plural kinds of polyaromatic hydrocarbon oxides contained in the dispersant are subjected to elemental analysis. Currently amended
The preparation method of claim 51, wherein the polyaromatic hydrocarbon oxides contained in the dispersant has a structure where one or more oxygen- containing functional groups are bonded to an aromatic hydrocarbon containing 5 to 30 benzene ri ngs. Currently amended
The preparation method of claim 7, wherein the aromatic hydrocarbon has 7 to 20 benzene rings in the structure. Original
Embodiments described in the patent, grouped by the materials and process steps they use.
1 material1 process step
Preparation of dispersant from pitch by oxidation treatment; molecular weight distribution analyzed by MALDI-TOF mass spectrum; further analyzed by 13C CPMAS NMR and FT-IR.
1 material
Preparation of additional dispersants from pitch; molecular weight distributions analyzed by MALDI-TOF mass spectrum.
3 materials1 process step
Preparation of graphene flakes by forming a dispersion of unoxidized graphite and dispersant, then continuously passing through a high pressure homogenizer with micro-channel under shear force. Resulting graphene flakes analyzed by SEM, TEM, AFM, and Raman spectroscopy.
1 material
Comparative preparation of graphene flakes; electron micrograph shown in FIG. 11.
1 material
Preparation of oxidized graphene flakes; analyzed by electron microscopy (FIG. 13), elemental analysis and Raman spectrum (FIGS. 14 and 15).
1 material
Comparative preparation of graphene flakes; electron micrograph shown in FIG. 9.
1 material
Comparative preparation of graphene flakes; electron micrograph shown in FIG. 10.
Materials described outside the worked examples.
planar graphite
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 5 is a drawing showing the analysis results, after analyzing pitch and a dispersant of Preparation Example 1 by a FT-IR, respectively.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene flake thickness (claimed range) | 0.3–50 nm | graphene flake |
graphene flake diameter (claimed range) | 0.1–10 um |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,950,930Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is an outlined schematic view showing a principle of high pressure homogenizer usable in a preparation method of graphene of an exemplary embodiment. …
FIGS. 2A and 2B (enlarged views), it was confirmed that the pitch includes polyaromatic hydrocarbons having a molecular weight of 200 to 1500, and especially, …
FIGS. 3A and 3B (enlarged views in the range of molecular weight of 400 to 500). The analysis was carried out by adding the pitch or the dispersant to a …
FIG. 4, a carbon-derived peak of the aromatic hydrocarbons, and a carbon-derived peak of some aliphatic hydrocarbons were confirmed in the pitch, but the …
FIG. 5 is a drawing showing the analysis results, after analyzing pitch and a dispersant of Preparation Example 1 by a FT-IR, respectively.
FIG. 6, it was confirmed that as the oxidation time increases, the content of the components having a molecular weight more than about 1000, or about 700 …
FIG. 7, it was confirmed that the graphene flake having a small thickness and a large area, and with minimized defects was formed very well. The graphene flake of …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 9, it was confirmed that a thin and uniform graphene flake having an area of about 5 pm2 was formed very well. Example 4: Preparation of graphene flake The …
FIG. 10, it was confirmed that a thin and uniform graphene flake having an area of about 5 pm2 was formed very well. Comparative Exam p le 1: Preparation of …
FIG. 11, the graphene flake prepared in Example 1 shows an area of 10 pm2 or more which is larger than that of the graphene flake of Comparative Example 1, and …
FIG. 12 is a Raman spectrum of the graphene flake of Example 1. In the Raman spectrum, a D peak (at ~ 1,350 cm- 1) intensity is correspondingly increased as the …
FIG. 13 shows an electron micrograph of the oxidized graphene flake 33 which was exfoliated using oxidized graphite. Further, referring to the Raman spectrum of
FIG. 14, it shows an oxygen content of about 9.46%, which is in a very high level, as compared with the unoxidized graphite or graphene showing an oxygen …
FIG. 15, it was confirmed that a D -peak of about 1350 cm- 1 is much larger than the result obtained from the graphene flake and the like of the Examples, which …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A preparation method of graphene, the preparation method comprising: form ing a _ dispersion including a carbon-based material including unoxidized graphite, and a dispersant; and continuously passing the dispersion through a high pressure homogenizer including an inlet, an outlet, and a micro-channel for connection between the inlet and the outlet, having a diameter in a micrometer scale, wherein the carbon-based material is exfoliated, as the material is passed through the micro-channel under application of a shear force, thereby forming graphene having a thickness in nanoscale, and wherein the dispersant includes a mixture of a plurality of polyaromatic hydrocarbon oxides, including polyaromatic hydrocarbon oxides having a molecular weight of 300 to 1000, said dispersant being present in an amount of at least 60% by weight. Currently amended
The preparation method of claim 1, wherein the unoxidized graphite has an element ratio of oxygen to carbon (O/C atomic ratio) of 5% or less, as measured by elemental analysis measurement by combustion or XPS analysis (X-ray photoelectron spectrometry analysis). Original
The preparation method of claim 1, wherein the unoxidized graphite includes planar graphite. Original
The method of claim 1, wherein the dispersion is dispersion in which the carbon-based material and the dispersant are dissolved or dispersed in an aqueous solvent or a polar organic solvent. Original
The preparation method of claim 1, wherein the micro-channel has a diameter of 10 to 800 m. Original
The preparation method of claim 1, wherein the dispersion is introduced to the inlet of the high pressure homogenizer under application of pressure of 100 to 3000 bar to be passed through the micro-channel. Original
The preparation method of claim 1, wherein the graphene includes a graphene flake having a thickness of 0.3 to 50 nm. Original
The preparation method of claim 1, further comprising recovering graphene flakes from dispersion of the graphene flakes, and drying the graphene flakes. Original
Canceled
The preparation method of claim 51, wherein the dispersant has an oxygen content of 12 to 50% by weight, based on a total element content, when the plural kinds of polyaromatic hydrocarbon oxides contained in the dispersant are subjected to elemental analysis. Currently amended
The preparation method of claim 51, wherein the polyaromatic hydrocarbon oxides contained in the dispersant has a structure where one or more oxygen- containing functional groups are bonded to an aromatic hydrocarbon containing 5 to 30 benzene ri ngs. Currently amended
The preparation method of claim 7, wherein the aromatic hydrocarbon has 7 to 20 benzene rings in the structure. Original
Embodiments described in the patent, grouped by the materials and process steps they use.
1 material1 process step
Preparation of dispersant from pitch by oxidation treatment; molecular weight distribution analyzed by MALDI-TOF mass spectrum; further analyzed by 13C CPMAS NMR and FT-IR.
1 material
Preparation of additional dispersants from pitch; molecular weight distributions analyzed by MALDI-TOF mass spectrum.
3 materials1 process step
Preparation of graphene flakes by forming a dispersion of unoxidized graphite and dispersant, then continuously passing through a high pressure homogenizer with micro-channel under shear force. Resulting graphene flakes analyzed by SEM, TEM, AFM, and Raman spectroscopy.
1 material
Comparative preparation of graphene flakes; electron micrograph shown in FIG. 11.
1 material
Preparation of oxidized graphene flakes; analyzed by electron microscopy (FIG. 13), elemental analysis and Raman spectrum (FIGS. 14 and 15).
1 material
Comparative preparation of graphene flakes; electron micrograph shown in FIG. 9.
1 material
Comparative preparation of graphene flakes; electron micrograph shown in FIG. 10.
Materials described outside the worked examples.
planar graphite
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 5 is a drawing showing the analysis results, after analyzing pitch and a dispersant of Preparation Example 1 by a FT-IR, respectively.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene flake thickness (claimed range) | 0.3–50 nm | graphene flake |
graphene flake diameter (claimed range) | 0.1–10 um |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,950,930Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is an outlined schematic view showing a principle of high pressure homogenizer usable in a preparation method of graphene of an exemplary embodiment. …
FIGS. 2A and 2B (enlarged views), it was confirmed that the pitch includes polyaromatic hydrocarbons having a molecular weight of 200 to 1500, and especially, …
FIGS. 3A and 3B (enlarged views in the range of molecular weight of 400 to 500). The analysis was carried out by adding the pitch or the dispersant to a …
FIG. 4, a carbon-derived peak of the aromatic hydrocarbons, and a carbon-derived peak of some aliphatic hydrocarbons were confirmed in the pitch, but the …
FIG. 5 is a drawing showing the analysis results, after analyzing pitch and a dispersant of Preparation Example 1 by a FT-IR, respectively.
FIG. 6, it was confirmed that as the oxidation time increases, the content of the components having a molecular weight more than about 1000, or about 700 …
FIG. 7, it was confirmed that the graphene flake having a small thickness and a large area, and with minimized defects was formed very well. The graphene flake of …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 9, it was confirmed that a thin and uniform graphene flake having an area of about 5 pm2 was formed very well. Example 4: Preparation of graphene flake The …
FIG. 10, it was confirmed that a thin and uniform graphene flake having an area of about 5 pm2 was formed very well. Comparative Exam p le 1: Preparation of …
FIG. 11, the graphene flake prepared in Example 1 shows an area of 10 pm2 or more which is larger than that of the graphene flake of Comparative Example 1, and …
FIG. 12 is a Raman spectrum of the graphene flake of Example 1. In the Raman spectrum, a D peak (at ~ 1,350 cm- 1) intensity is correspondingly increased as the …
FIG. 13 shows an electron micrograph of the oxidized graphene flake 33 which was exfoliated using oxidized graphite. Further, referring to the Raman spectrum of
FIG. 14, it shows an oxygen content of about 9.46%, which is in a very high level, as compared with the unoxidized graphite or graphene showing an oxygen …
FIG. 15, it was confirmed that a D -peak of about 1350 cm- 1 is much larger than the result obtained from the graphene flake and the like of the Examples, which …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A preparation method of graphene, the preparation method comprising: form ing a _ dispersion including a carbon-based material including unoxidized graphite, and a dispersant; and continuously passing the dispersion through a high pressure homogenizer including an inlet, an outlet, and a micro-channel for connection between the inlet and the outlet, having a diameter in a micrometer scale, wherein the carbon-based material is exfoliated, as the material is passed through the micro-channel under application of a shear force, thereby forming graphene having a thickness in nanoscale, and wherein the dispersant includes a mixture of a plurality of polyaromatic hydrocarbon oxides, including polyaromatic hydrocarbon oxides having a molecular weight of 300 to 1000, said dispersant being present in an amount of at least 60% by weight. Currently amended
The preparation method of claim 1, wherein the unoxidized graphite has an element ratio of oxygen to carbon (O/C atomic ratio) of 5% or less, as measured by elemental analysis measurement by combustion or XPS analysis (X-ray photoelectron spectrometry analysis). Original
The preparation method of claim 1, wherein the unoxidized graphite includes planar graphite. Original
The method of claim 1, wherein the dispersion is dispersion in which the carbon-based material and the dispersant are dissolved or dispersed in an aqueous solvent or a polar organic solvent. Original
The preparation method of claim 1, wherein the micro-channel has a diameter of 10 to 800 m. Original
The preparation method of claim 1, wherein the dispersion is introduced to the inlet of the high pressure homogenizer under application of pressure of 100 to 3000 bar to be passed through the micro-channel. Original
The preparation method of claim 1, wherein the graphene includes a graphene flake having a thickness of 0.3 to 50 nm. Original
The preparation method of claim 1, further comprising recovering graphene flakes from dispersion of the graphene flakes, and drying the graphene flakes. Original
Canceled
The preparation method of claim 51, wherein the dispersant has an oxygen content of 12 to 50% by weight, based on a total element content, when the plural kinds of polyaromatic hydrocarbon oxides contained in the dispersant are subjected to elemental analysis. Currently amended
The preparation method of claim 51, wherein the polyaromatic hydrocarbon oxides contained in the dispersant has a structure where one or more oxygen- containing functional groups are bonded to an aromatic hydrocarbon containing 5 to 30 benzene ri ngs. Currently amended
The preparation method of claim 7, wherein the aromatic hydrocarbon has 7 to 20 benzene rings in the structure. Original
Embodiments described in the patent, grouped by the materials and process steps they use.
1 material1 process step
Preparation of dispersant from pitch by oxidation treatment; molecular weight distribution analyzed by MALDI-TOF mass spectrum; further analyzed by 13C CPMAS NMR and FT-IR.
1 material
Preparation of additional dispersants from pitch; molecular weight distributions analyzed by MALDI-TOF mass spectrum.
3 materials1 process step
Preparation of graphene flakes by forming a dispersion of unoxidized graphite and dispersant, then continuously passing through a high pressure homogenizer with micro-channel under shear force. Resulting graphene flakes analyzed by SEM, TEM, AFM, and Raman spectroscopy.
1 material
Comparative preparation of graphene flakes; electron micrograph shown in FIG. 11.
1 material
Preparation of oxidized graphene flakes; analyzed by electron microscopy (FIG. 13), elemental analysis and Raman spectrum (FIGS. 14 and 15).
1 material
Comparative preparation of graphene flakes; electron micrograph shown in FIG. 9.
1 material
Comparative preparation of graphene flakes; electron micrograph shown in FIG. 10.
Materials described outside the worked examples.
planar graphite
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 5 is a drawing showing the analysis results, after analyzing pitch and a dispersant of Preparation Example 1 by a FT-IR, respectively.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene flake thickness (claimed range) | 0.3–50 nm | graphene flake |
graphene flake diameter (claimed range) | 0.1–10 um |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,950,930Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is an outlined schematic view showing a principle of high pressure homogenizer usable in a preparation method of graphene of an exemplary embodiment. …
FIGS. 2A and 2B (enlarged views), it was confirmed that the pitch includes polyaromatic hydrocarbons having a molecular weight of 200 to 1500, and especially, …
FIGS. 3A and 3B (enlarged views in the range of molecular weight of 400 to 500). The analysis was carried out by adding the pitch or the dispersant to a …
FIG. 4, a carbon-derived peak of the aromatic hydrocarbons, and a carbon-derived peak of some aliphatic hydrocarbons were confirmed in the pitch, but the …
FIG. 5 is a drawing showing the analysis results, after analyzing pitch and a dispersant of Preparation Example 1 by a FT-IR, respectively.
FIG. 6, it was confirmed that as the oxidation time increases, the content of the components having a molecular weight more than about 1000, or about 700 …
FIG. 7, it was confirmed that the graphene flake having a small thickness and a large area, and with minimized defects was formed very well. The graphene flake of …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 9, it was confirmed that a thin and uniform graphene flake having an area of about 5 pm2 was formed very well. Example 4: Preparation of graphene flake The …
FIG. 10, it was confirmed that a thin and uniform graphene flake having an area of about 5 pm2 was formed very well. Comparative Exam p le 1: Preparation of …
FIG. 11, the graphene flake prepared in Example 1 shows an area of 10 pm2 or more which is larger than that of the graphene flake of Comparative Example 1, and …
FIG. 12 is a Raman spectrum of the graphene flake of Example 1. In the Raman spectrum, a D peak (at ~ 1,350 cm- 1) intensity is correspondingly increased as the …
FIG. 13 shows an electron micrograph of the oxidized graphene flake 33 which was exfoliated using oxidized graphite. Further, referring to the Raman spectrum of
FIG. 14, it shows an oxygen content of about 9.46%, which is in a very high level, as compared with the unoxidized graphite or graphene showing an oxygen …
FIG. 15, it was confirmed that a D -peak of about 1350 cm- 1 is much larger than the result obtained from the graphene flake and the like of the Examples, which …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A preparation method of graphene, the preparation method comprising: form ing a _ dispersion including a carbon-based material including unoxidized graphite, and a dispersant; and continuously passing the dispersion through a high pressure homogenizer including an inlet, an outlet, and a micro-channel for connection between the inlet and the outlet, having a diameter in a micrometer scale, wherein the carbon-based material is exfoliated, as the material is passed through the micro-channel under application of a shear force, thereby forming graphene having a thickness in nanoscale, and wherein the dispersant includes a mixture of a plurality of polyaromatic hydrocarbon oxides, including polyaromatic hydrocarbon oxides having a molecular weight of 300 to 1000, said dispersant being present in an amount of at least 60% by weight. Currently amended
The preparation method of claim 1, wherein the unoxidized graphite has an element ratio of oxygen to carbon (O/C atomic ratio) of 5% or less, as measured by elemental analysis measurement by combustion or XPS analysis (X-ray photoelectron spectrometry analysis). Original
The preparation method of claim 1, wherein the unoxidized graphite includes planar graphite. Original
The method of claim 1, wherein the dispersion is dispersion in which the carbon-based material and the dispersant are dissolved or dispersed in an aqueous solvent or a polar organic solvent. Original
The preparation method of claim 1, wherein the micro-channel has a diameter of 10 to 800 m. Original
The preparation method of claim 1, wherein the dispersion is introduced to the inlet of the high pressure homogenizer under application of pressure of 100 to 3000 bar to be passed through the micro-channel. Original
The preparation method of claim 1, wherein the graphene includes a graphene flake having a thickness of 0.3 to 50 nm. Original
The preparation method of claim 1, further comprising recovering graphene flakes from dispersion of the graphene flakes, and drying the graphene flakes. Original
Canceled
The preparation method of claim 51, wherein the dispersant has an oxygen content of 12 to 50% by weight, based on a total element content, when the plural kinds of polyaromatic hydrocarbon oxides contained in the dispersant are subjected to elemental analysis. Currently amended
The preparation method of claim 51, wherein the polyaromatic hydrocarbon oxides contained in the dispersant has a structure where one or more oxygen- containing functional groups are bonded to an aromatic hydrocarbon containing 5 to 30 benzene ri ngs. Currently amended
The preparation method of claim 7, wherein the aromatic hydrocarbon has 7 to 20 benzene rings in the structure. Original
Embodiments described in the patent, grouped by the materials and process steps they use.
1 material1 process step
Preparation of dispersant from pitch by oxidation treatment; molecular weight distribution analyzed by MALDI-TOF mass spectrum; further analyzed by 13C CPMAS NMR and FT-IR.
1 material
Preparation of additional dispersants from pitch; molecular weight distributions analyzed by MALDI-TOF mass spectrum.
3 materials1 process step
Preparation of graphene flakes by forming a dispersion of unoxidized graphite and dispersant, then continuously passing through a high pressure homogenizer with micro-channel under shear force. Resulting graphene flakes analyzed by SEM, TEM, AFM, and Raman spectroscopy.
1 material
Comparative preparation of graphene flakes; electron micrograph shown in FIG. 11.
1 material
Preparation of oxidized graphene flakes; analyzed by electron microscopy (FIG. 13), elemental analysis and Raman spectrum (FIGS. 14 and 15).
1 material
Comparative preparation of graphene flakes; electron micrograph shown in FIG. 9.
1 material
Comparative preparation of graphene flakes; electron micrograph shown in FIG. 10.
Materials described outside the worked examples.
planar graphite
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 5 is a drawing showing the analysis results, after analyzing pitch and a dispersant of Preparation Example 1 by a FT-IR, respectively.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene flake thickness (claimed range) | 0.3–50 nm | graphene flake |
graphene flake diameter (claimed range) | 0.1–10 um |
Related documents with shared materials, methods, properties, or citations.
FIG. 7, it was confirmed that the graphene flake having a small thickness and a large area, and with minimized defects was formed very well. The graphene flake of …
FIG. 7, it was confirmed that the graphene flake having a small thickness and a large area, and with minimized defects was formed very well. The graphene flake of …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 12 is a Raman spectrum of the graphene flake of Example 1. In the Raman spectrum, a D peak (at ~ 1,350 cm- 1) intensity is correspondingly increased as the …
FIG. 13 shows an electron micrograph of the oxidized graphene flake 33 which was exfoliated using oxidized graphite. Further, referring to the Raman spectrum of
FIG. 14, it shows an oxygen content of about 9.46%, which is in a very high level, as compared with the unoxidized graphite or graphene showing an oxygen …
FIG. 14, it shows an oxygen content of about 9.46%, which is in a very high level, as compared with the unoxidized graphite or graphene showing an oxygen …
graphene flake diameter/thickness ratio (claimed range) | 50–6000 | graphene flake |
Thickness | 6–17 nm | — |
Thickness | 5–20 nm | — |
Pressure | 100–3000 bar | — |
Thickness | 0.3–30 nm | — |
Duration | 0.5–20 hours | — |
Duration | 1–12 hours | — |
FIG. 7, it was confirmed that the graphene flake having a small thickness and a large area, and with minimized defects was formed very well. The graphene flake of …
FIG. 7, it was confirmed that the graphene flake having a small thickness and a large area, and with minimized defects was formed very well. The graphene flake of …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 12 is a Raman spectrum of the graphene flake of Example 1. In the Raman spectrum, a D peak (at ~ 1,350 cm- 1) intensity is correspondingly increased as the …
FIG. 13 shows an electron micrograph of the oxidized graphene flake 33 which was exfoliated using oxidized graphite. Further, referring to the Raman spectrum of
FIG. 14, it shows an oxygen content of about 9.46%, which is in a very high level, as compared with the unoxidized graphite or graphene showing an oxygen …
FIG. 14, it shows an oxygen content of about 9.46%, which is in a very high level, as compared with the unoxidized graphite or graphene showing an oxygen …
graphene flake diameter/thickness ratio (claimed range) | 50–6000 | graphene flake |
Thickness | 6–17 nm | — |
Thickness | 5–20 nm | — |
Pressure | 100–3000 bar | — |
Thickness | 0.3–30 nm | — |
Duration | 0.5–20 hours | — |
Duration | 1–12 hours | — |
FIG. 7, it was confirmed that the graphene flake having a small thickness and a large area, and with minimized defects was formed very well. The graphene flake of …
FIG. 7, it was confirmed that the graphene flake having a small thickness and a large area, and with minimized defects was formed very well. The graphene flake of …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 12 is a Raman spectrum of the graphene flake of Example 1. In the Raman spectrum, a D peak (at ~ 1,350 cm- 1) intensity is correspondingly increased as the …
FIG. 13 shows an electron micrograph of the oxidized graphene flake 33 which was exfoliated using oxidized graphite. Further, referring to the Raman spectrum of
FIG. 14, it shows an oxygen content of about 9.46%, which is in a very high level, as compared with the unoxidized graphite or graphene showing an oxygen …
FIG. 14, it shows an oxygen content of about 9.46%, which is in a very high level, as compared with the unoxidized graphite or graphene showing an oxygen …
graphene flake diameter/thickness ratio (claimed range) | 50–6000 | graphene flake |
Thickness | 6–17 nm | — |
Thickness | 5–20 nm | — |
Pressure | 100–3000 bar | — |
Thickness | 0.3–30 nm | — |
Duration | 0.5–20 hours | — |
Duration | 1–12 hours | — |
FIG. 7, it was confirmed that the graphene flake having a small thickness and a large area, and with minimized defects was formed very well. The graphene flake of …
FIG. 7, it was confirmed that the graphene flake having a small thickness and a large area, and with minimized defects was formed very well. The graphene flake of …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 8 above, it was confirmed that the graphene flake of Example 1 had a very small thickness so that a carbon grid in the lower part (red arrow in the drawing) …
FIG. 12 is a Raman spectrum of the graphene flake of Example 1. In the Raman spectrum, a D peak (at ~ 1,350 cm- 1) intensity is correspondingly increased as the …
FIG. 13 shows an electron micrograph of the oxidized graphene flake 33 which was exfoliated using oxidized graphite. Further, referring to the Raman spectrum of
FIG. 14, it shows an oxygen content of about 9.46%, which is in a very high level, as compared with the unoxidized graphite or graphene showing an oxygen …
FIG. 14, it shows an oxygen content of about 9.46%, which is in a very high level, as compared with the unoxidized graphite or graphene showing an oxygen …
graphene flake diameter/thickness ratio (claimed range) | 50–6000 | graphene flake |
Thickness | 6–17 nm | — |
Thickness | 5–20 nm | — |
Pressure | 100–3000 bar | — |
Thickness | 0.3–30 nm | — |
Duration | 0.5–20 hours | — |
Duration | 1–12 hours | — |