Patent
US 11,072,862Methods of Making Graphene Materials
Ian Mellor
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 11,072,862Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of making a graphene material comprising the steps o f: electrolytically reducing a transition metal oxide to a transition metal in an electrolytic cell using a molten salt electrolyte and a carbon anode; followed by extracting a dry graphene material from the electrolytic cell.
The method according to claim 1, wherein the step of electrolytically reducing is performed at a temperature of about 900 ° -1000 °C. Previously presented
The method of claim 1, further comprising drying the graphene material. Previously presented
A method according to paragraph 1, wherein the transition metal oxide comprises a titanium oxide or a tantalum oxide.
A method according to paragraph 2, wherein the transition metal oxide comprises a titanium oxide, or consists essentially of titanium oxide.
A method according to any preceding paragraph, wherein the step of electrolytically reducing takes place in an atmosphere free of added water vapor, hydrogen or carbon dioxide.
A method according to any preceding paragraph, wherein the method further comprises one or more steps of purifying the graphene material selected from centrifuging, panning, solvent separation, and interfacial separation.
A method according to paragraph 5, wherein the method comprises isolating graphene material from an interfacial region of an aqueous/water-immiscible organic solvent system, preferably wherein the water-immiscible organic solvent comprises or consists essentially of toluene. PATENT
The method according to claim 6, wherein the water- immiscible organic solvent comprises or consists essentially of toluene. Previously presented
A method according to any preceding paragraph, wherein the step of electrolytically reducing is performed at a temperature above about 400 ° C, preferably above 600 ° C, more preferably about 900 ° -1000 °C.
The method according to claim 7, wherein the step of electrolytically reducing is performed at a temperature above 600 [[]] C and below 1000 [[]]C. Currently amended
A method according to any preceding paragraph, wherein the electrolyte comprises at least about 95wt.% of calcium chloride and 0.5-5% calcium oxide.
A method according to any preceding paragraph, wherein the molten electrolyte comprises less than about 400ppm of H +, preferably less than about 2 50 ppm of H +, more preferably less than about 1 00 ppm of H +.
The method according to claim 9, wherein the molten electrolyte comprises less than about 2 50 ppm of H +. Previously presented
The method according to claim 9, wherein the molten electrolyte comprises less than about 100 ppm of H +. Previously presented
A method according to any preceding paragraph, wherein the step of separating the graphene comprises dispersing the transition metal and the graphene material in a solvent.
A method according to any preceding paragraph, further comprising treating the graphene material to remove residual transition metal and oxide materials therefrom.
A method according to any preceding paragraph, wherein the graphene material is extracted from the transition metal electrode following electrolysis.
A method according to any preceding paragraph, wherein the graphene material is extracted from a surface layer of the electrolyte following electrolysis.
A graphene material obtainable or obtained by a method according to any preceding paragraph.
A secondary battery comprising an anode and a cathode, wherein the anode or the cathode comprises a graphene material according to the present invention. SVG 16103088.08-14-2018.JKTZY₅P₄RXEAPX0.SPEC.23.23.1228.2058.1322.2079.svg 0.07 0.313 Chemistry Black and white [00126] Having thus described in detail preferred embodiments of the present invention, it is to be understood that the invention defined by the above paragraphs is not to be limited to particular details set forth in the above description as many apparent variations thereof are possible without departing from the spirit or scope of the present invention. Claims What is claimed is:
Layer stacks claimed or described, ordered top of device to substrate.
secondary battery
Materials described outside the worked examples.
graphene material
transition metal
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Duration | 5–10 minutes | — |
Thickness |
Patent
Atlas literature
Patent
US 11,072,862Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of making a graphene material comprising the steps o f: electrolytically reducing a transition metal oxide to a transition metal in an electrolytic cell using a molten salt electrolyte and a carbon anode; followed by extracting a dry graphene material from the electrolytic cell.
The method according to claim 1, wherein the step of electrolytically reducing is performed at a temperature of about 900 ° -1000 °C. Previously presented
The method of claim 1, further comprising drying the graphene material. Previously presented
A method according to paragraph 1, wherein the transition metal oxide comprises a titanium oxide or a tantalum oxide.
A method according to paragraph 2, wherein the transition metal oxide comprises a titanium oxide, or consists essentially of titanium oxide.
A method according to any preceding paragraph, wherein the step of electrolytically reducing takes place in an atmosphere free of added water vapor, hydrogen or carbon dioxide.
A method according to any preceding paragraph, wherein the method further comprises one or more steps of purifying the graphene material selected from centrifuging, panning, solvent separation, and interfacial separation.
A method according to paragraph 5, wherein the method comprises isolating graphene material from an interfacial region of an aqueous/water-immiscible organic solvent system, preferably wherein the water-immiscible organic solvent comprises or consists essentially of toluene. PATENT
The method according to claim 6, wherein the water- immiscible organic solvent comprises or consists essentially of toluene. Previously presented
A method according to any preceding paragraph, wherein the step of electrolytically reducing is performed at a temperature above about 400 ° C, preferably above 600 ° C, more preferably about 900 ° -1000 °C.
The method according to claim 7, wherein the step of electrolytically reducing is performed at a temperature above 600 [[]] C and below 1000 [[]]C. Currently amended
A method according to any preceding paragraph, wherein the electrolyte comprises at least about 95wt.% of calcium chloride and 0.5-5% calcium oxide.
A method according to any preceding paragraph, wherein the molten electrolyte comprises less than about 400ppm of H +, preferably less than about 2 50 ppm of H +, more preferably less than about 1 00 ppm of H +.
The method according to claim 9, wherein the molten electrolyte comprises less than about 2 50 ppm of H +. Previously presented
The method according to claim 9, wherein the molten electrolyte comprises less than about 100 ppm of H +. Previously presented
A method according to any preceding paragraph, wherein the step of separating the graphene comprises dispersing the transition metal and the graphene material in a solvent.
A method according to any preceding paragraph, further comprising treating the graphene material to remove residual transition metal and oxide materials therefrom.
A method according to any preceding paragraph, wherein the graphene material is extracted from the transition metal electrode following electrolysis.
A method according to any preceding paragraph, wherein the graphene material is extracted from a surface layer of the electrolyte following electrolysis.
A graphene material obtainable or obtained by a method according to any preceding paragraph.
A secondary battery comprising an anode and a cathode, wherein the anode or the cathode comprises a graphene material according to the present invention. SVG 16103088.08-14-2018.JKTZY₅P₄RXEAPX0.SPEC.23.23.1228.2058.1322.2079.svg 0.07 0.313 Chemistry Black and white [00126] Having thus described in detail preferred embodiments of the present invention, it is to be understood that the invention defined by the above paragraphs is not to be limited to particular details set forth in the above description as many apparent variations thereof are possible without departing from the spirit or scope of the present invention. Claims What is claimed is:
Layer stacks claimed or described, ordered top of device to substrate.
secondary battery
Materials described outside the worked examples.
graphene material
transition metal
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Duration | 5–10 minutes | — |
Thickness |
Patent
Atlas literature
Patent
US 11,072,862Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of making a graphene material comprising the steps o f: electrolytically reducing a transition metal oxide to a transition metal in an electrolytic cell using a molten salt electrolyte and a carbon anode; followed by extracting a dry graphene material from the electrolytic cell.
The method according to claim 1, wherein the step of electrolytically reducing is performed at a temperature of about 900 ° -1000 °C. Previously presented
The method of claim 1, further comprising drying the graphene material. Previously presented
A method according to paragraph 1, wherein the transition metal oxide comprises a titanium oxide or a tantalum oxide.
A method according to paragraph 2, wherein the transition metal oxide comprises a titanium oxide, or consists essentially of titanium oxide.
A method according to any preceding paragraph, wherein the step of electrolytically reducing takes place in an atmosphere free of added water vapor, hydrogen or carbon dioxide.
A method according to any preceding paragraph, wherein the method further comprises one or more steps of purifying the graphene material selected from centrifuging, panning, solvent separation, and interfacial separation.
A method according to paragraph 5, wherein the method comprises isolating graphene material from an interfacial region of an aqueous/water-immiscible organic solvent system, preferably wherein the water-immiscible organic solvent comprises or consists essentially of toluene. PATENT
The method according to claim 6, wherein the water- immiscible organic solvent comprises or consists essentially of toluene. Previously presented
A method according to any preceding paragraph, wherein the step of electrolytically reducing is performed at a temperature above about 400 ° C, preferably above 600 ° C, more preferably about 900 ° -1000 °C.
The method according to claim 7, wherein the step of electrolytically reducing is performed at a temperature above 600 [[]] C and below 1000 [[]]C. Currently amended
A method according to any preceding paragraph, wherein the electrolyte comprises at least about 95wt.% of calcium chloride and 0.5-5% calcium oxide.
A method according to any preceding paragraph, wherein the molten electrolyte comprises less than about 400ppm of H +, preferably less than about 2 50 ppm of H +, more preferably less than about 1 00 ppm of H +.
The method according to claim 9, wherein the molten electrolyte comprises less than about 2 50 ppm of H +. Previously presented
The method according to claim 9, wherein the molten electrolyte comprises less than about 100 ppm of H +. Previously presented
A method according to any preceding paragraph, wherein the step of separating the graphene comprises dispersing the transition metal and the graphene material in a solvent.
A method according to any preceding paragraph, further comprising treating the graphene material to remove residual transition metal and oxide materials therefrom.
A method according to any preceding paragraph, wherein the graphene material is extracted from the transition metal electrode following electrolysis.
A method according to any preceding paragraph, wherein the graphene material is extracted from a surface layer of the electrolyte following electrolysis.
A graphene material obtainable or obtained by a method according to any preceding paragraph.
A secondary battery comprising an anode and a cathode, wherein the anode or the cathode comprises a graphene material according to the present invention. SVG 16103088.08-14-2018.JKTZY₅P₄RXEAPX0.SPEC.23.23.1228.2058.1322.2079.svg 0.07 0.313 Chemistry Black and white [00126] Having thus described in detail preferred embodiments of the present invention, it is to be understood that the invention defined by the above paragraphs is not to be limited to particular details set forth in the above description as many apparent variations thereof are possible without departing from the spirit or scope of the present invention. Claims What is claimed is:
Layer stacks claimed or described, ordered top of device to substrate.
secondary battery
Materials described outside the worked examples.
graphene material
transition metal
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Duration | 5–10 minutes | — |
Thickness |
Patent
Atlas literature
Patent
US 11,072,862Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of making a graphene material comprising the steps o f: electrolytically reducing a transition metal oxide to a transition metal in an electrolytic cell using a molten salt electrolyte and a carbon anode; followed by extracting a dry graphene material from the electrolytic cell.
The method according to claim 1, wherein the step of electrolytically reducing is performed at a temperature of about 900 ° -1000 °C. Previously presented
The method of claim 1, further comprising drying the graphene material. Previously presented
A method according to paragraph 1, wherein the transition metal oxide comprises a titanium oxide or a tantalum oxide.
A method according to paragraph 2, wherein the transition metal oxide comprises a titanium oxide, or consists essentially of titanium oxide.
A method according to any preceding paragraph, wherein the step of electrolytically reducing takes place in an atmosphere free of added water vapor, hydrogen or carbon dioxide.
A method according to any preceding paragraph, wherein the method further comprises one or more steps of purifying the graphene material selected from centrifuging, panning, solvent separation, and interfacial separation.
A method according to paragraph 5, wherein the method comprises isolating graphene material from an interfacial region of an aqueous/water-immiscible organic solvent system, preferably wherein the water-immiscible organic solvent comprises or consists essentially of toluene. PATENT
The method according to claim 6, wherein the water- immiscible organic solvent comprises or consists essentially of toluene. Previously presented
A method according to any preceding paragraph, wherein the step of electrolytically reducing is performed at a temperature above about 400 ° C, preferably above 600 ° C, more preferably about 900 ° -1000 °C.
The method according to claim 7, wherein the step of electrolytically reducing is performed at a temperature above 600 [[]] C and below 1000 [[]]C. Currently amended
A method according to any preceding paragraph, wherein the electrolyte comprises at least about 95wt.% of calcium chloride and 0.5-5% calcium oxide.
A method according to any preceding paragraph, wherein the molten electrolyte comprises less than about 400ppm of H +, preferably less than about 2 50 ppm of H +, more preferably less than about 1 00 ppm of H +.
The method according to claim 9, wherein the molten electrolyte comprises less than about 2 50 ppm of H +. Previously presented
The method according to claim 9, wherein the molten electrolyte comprises less than about 100 ppm of H +. Previously presented
A method according to any preceding paragraph, wherein the step of separating the graphene comprises dispersing the transition metal and the graphene material in a solvent.
A method according to any preceding paragraph, further comprising treating the graphene material to remove residual transition metal and oxide materials therefrom.
A method according to any preceding paragraph, wherein the graphene material is extracted from the transition metal electrode following electrolysis.
A method according to any preceding paragraph, wherein the graphene material is extracted from a surface layer of the electrolyte following electrolysis.
A graphene material obtainable or obtained by a method according to any preceding paragraph.
A secondary battery comprising an anode and a cathode, wherein the anode or the cathode comprises a graphene material according to the present invention. SVG 16103088.08-14-2018.JKTZY₅P₄RXEAPX0.SPEC.23.23.1228.2058.1322.2079.svg 0.07 0.313 Chemistry Black and white [00126] Having thus described in detail preferred embodiments of the present invention, it is to be understood that the invention defined by the above paragraphs is not to be limited to particular details set forth in the above description as many apparent variations thereof are possible without departing from the spirit or scope of the present invention. Claims What is claimed is:
Layer stacks claimed or described, ordered top of device to substrate.
secondary battery
Materials described outside the worked examples.
graphene material
transition metal
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Duration | 5–10 minutes | — |
Thickness |
molten salt electrolyte (calcium chloride-based)
carbon anode
C
titanium oxide
TiO₂
tantalum oxide
Ta₂O₅
toluene
C₇H₈
calcium oxide
CaO
| — |
Temperature | 450–500 °C | — |
Duration | 30–60 seconds | — |
Thickness | ≤ 5 mm | — |
Duration | 10–100 hours | — |
Temperature | 900–1000 °C | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 90 nm | — |
Thickness | ≤ 20 nm | — |
Thickness | ≤ 10 nm | — |
molten salt electrolyte (calcium chloride-based)
carbon anode
C
titanium oxide
TiO₂
tantalum oxide
Ta₂O₅
toluene
C₇H₈
calcium oxide
CaO
| — |
Temperature | 450–500 °C | — |
Duration | 30–60 seconds | — |
Thickness | ≤ 5 mm | — |
Duration | 10–100 hours | — |
Temperature | 900–1000 °C | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 90 nm | — |
Thickness | ≤ 20 nm | — |
Thickness | ≤ 10 nm | — |
molten salt electrolyte (calcium chloride-based)
carbon anode
C
titanium oxide
TiO₂
tantalum oxide
Ta₂O₅
toluene
C₇H₈
calcium oxide
CaO
| — |
Temperature | 450–500 °C | — |
Duration | 30–60 seconds | — |
Thickness | ≤ 5 mm | — |
Duration | 10–100 hours | — |
Temperature | 900–1000 °C | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 90 nm | — |
Thickness | ≤ 20 nm | — |
Thickness | ≤ 10 nm | — |
molten salt electrolyte (calcium chloride-based)
carbon anode
C
titanium oxide
TiO₂
tantalum oxide
Ta₂O₅
toluene
C₇H₈
calcium oxide
CaO
| — |
Temperature | 450–500 °C | — |
Duration | 30–60 seconds | — |
Thickness | ≤ 5 mm | — |
Duration | 10–100 hours | — |
Temperature | 900–1000 °C | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 90 nm | — |
Thickness | ≤ 20 nm | — |
Thickness | ≤ 10 nm | — |