Patent
US 10,957,495Supercapacitor Electrode and Production Process
Aruna Zhamu
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 10,957,495Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1(A) A flow chart illustrating various prior art processes of producing exfoliated graphite products (flexible graphite foils and expanded graphite flakes), …
FIG. 2 Schematic of a conventional activated carbon-based supercapacitor cell.
FIG. 3(A) Schematic drawing to illustrate an example of a compressing and consolidating operation (using a mold cavity cell equipped with a piston or ram) for …
FIG. 4(B) The electrode volumetric capacitance values of two series of supercapacitors (conventional and presently disclosed process; with or without CNF …
FIG. 5(A) Ragone plots (gravimetric and volumetric power density vs. energy density) of symmetric supercapacitor (EDLC) cells containing isolated …
FIG. 6 Ragone plots of two pristine graphene-based EDLC supercapacitors having graphene sheets parallel and perpendicular, respectively, to the current …
FIG. 7 Ragone plots of two graphene-conductive polymer redox supercapacitors (pseudo- capacitors) having graphene/sulfonated polyaniline (S-PANi) and …
FIG. 8 Ragone plots of lithium ion capacitor (LIC) cells containing pristine graphene sheets (with or without CNF spacers) as the cathode active material and …
FIG. 9 The cell-level gravimetric and volumetric energy densities plotted over the achievable electrode thickness range of the RGO-based EDLC supercapacitors …
FIG. 10 The cell-level gravimetric energy densities plotted over the achievable active material proportion (active material weight/total cell weight) in a …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A supercapacitor comprising an anode, a cathode, an ion-permeable separator disposed between said anode and said cathode, and an electrolyte in ionic contact with said anode and said cathode, wherein at least one of the anode and the cathode contains multiple graphene sheets spaced by cellulosic nanofibers and has a specific surface area from 50 to 3,300 m 2/g and wherein said at least one of the anode and the cathode has a physical density from 0.5 to 1.7 g/cm 3, and wherein said at least one of the anode and the cathode is capable of delivering a gravimetric specific capacitance greater than 210 F/g. Previously presented
The supercapacitor of claim 1, wherein said graphene sheets are selected from a pristine graphene or a non-pristine graphene material, having a content of non-carbon elements from 2% to 50% by weight, selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, chemically functionalized graphene, doped graphene, or a combination thereof. Original
The supercapacitor of claim 1, wherein said cellulosic nanofibers have a diameter from 1 nm to 100 nm. Original
The supercapacitor of claim 1, wherein said cellulosic nanofibers have a diameter from 2 nm to 10 nm. Original
The supercapacitor of claim 1, wherein said multiple graphene sheets are substantially aligned along a desired direction... Currently amended
The supercapacitor of claim 1, wherein said at least one of the anode and the cathode has a physical density from 0.7 to 1.3 g/cm 3. Original
The supercapacitor of claim 1, wherein said graphene sheets are deposited with a nanoscaled coating or particles of a redox pair partner selected from an intrinsically conductive polymer, a transition metal oxide, and/or an organic molecule, wherein said redox pair partner and said graphene sheets form a redox pair for pseudo-capacitance. Original
The supercapacitor of claim 1, wherein said electrolyte contains an aqueous electrolyte, an organic electrolyte, an inorganic electrolyte, an ionic liquid electrolyte, or a mixture of an organic and an ionic electrolyte. Original
The supercapacitor of claim 1, further comprising an anode current collector in electronic contact with said anode or a cathode current collector in electronic contact with said cathode. Original
The supercapacitor of claim 1, wherein both the anode and the cathode contain graphene sheets spaced by cellulosic nanofibers and have a specific surface area from 50 to 3,300 m 2/g. Original
The supercapacitor of claim 1, which is a lithium-ion capacitor or sodium-ion capacitor, wherein said cathode contains said cellulosic nanofiber-spaced graphene sheets and said anode contains a pre-lithiated anode active material or a pre- sodiated anode active material. Previously presented
A supercapacitor electrode containing an electrolyte-impregnated laminar structure containing multiple graphene sheets that are spaced by cellulosic nanofibers and having a specific surface area from 50 to 3,300 m 2/g, wherein said supercapacitor electrode contains a liquid or gel electrolyte residing in a space between graphene sheets, wherein said electrode provides a specific capacitance greater than 210 F/g. Previously presented
The supercapacitor electrode of claim 13, wherein said graphene sheets are selected from a pristine graphene or a non-pristine graphene material, having a content of non-carbon elements from 2% to 50% by weight, selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, chemically functionalized graphene, doped graphene, or a combination thereof. Original
The supercapacitor electrode of claim 13, wherein said cellulosic nanofibers have a diameter from 1 nm to 100 nm. Original
The supercapacitor electrode of claim 13, wherein said cellulosic nanofibers have a diameter from 2 nm to 10 nm. Original
The supercapacitor electrode of claim 13, wherein said graphene sheets are deposited with a nanoscaled coating or particles of a redox pair partner selected from an intrinsically conductive polymer, a transition metal oxide, and/or an organic molecule, wherein said redox pair partner and said graphene sheets form a redox pair for pseudo- capacitance. Original
The supercapacitor electrode of claim 13, wherein said multiple graphene sheets are substantially aligned along a desired direction, and wherein said electrode has a physical density from 0.5 to 1.7 g/cm 3. Original
The supercapacitor of claim 13, wherein said electrode has a physical density from 0.7 to 1.3 g/cm 3. Original
A process of producing the supercapacitor electrode of claim 13, said process comprising a) dispersing said multiple graphene sheets, said cellulosic nanofibers, an optional conductive additive, and an optional resin binder in a liquid medium to form a graphene slurry; b) dispensing and depositing said graphene slurry onto a surface of a solid substrate or a current collector and forming a wet graphene layer thereon which is optionally subjected to a compression treatment to align graphene sheets along a desired direction; c) at least partially removing said liquid medium from said wet graphene layer to form a dry graphene layer wherein multiple graphene sheets are spaced by said cellulosic nanofibers to form said supercapacitor electrode, and d) an optional compression treatment to increase a density of said supercapacitor electrode. Withdrawn
Canceled
A process of producing the supercapacitor electrode of claim 14, said process comprising (a) preparing a graphene dispersion having multiple isolated graphene sheets and cellulosic nanofibers dispersed in a liquid or gel electrolyte; and (b) subjecting said graphene dispersion to a forced assembly procedure, forcing said multiple graphene sheets and cellulosic nanofibers to assemble into an electrolyte-impregnated laminar graphene structure, wherein said multiple graphene sheets are alternately spaced by thin electrolyte layers having a thickness from 0.4 nm to 10 nm and having cellulosic nanofibers dispersed in said thin electrolyte layers and said multiple graphene sheets are substantially aligned along a desired direction, and wherein said laminar graphene structure has a physical density from 0.5 to 1.7 g/cm 3 and a specific surface area from 50 to 3,300 m 2/g, when measured in a dried state of said laminar structure with said electrolyte removed. Withdrawn
A process of producing a supercapacitor electrode, comprising stacking a current collector with at least a layer of said electrolyte-impregnated laminar graphene structure of claim 14 to form a multiple-layer structure and further comprising a step of compressing and consolidating said multi-layer structure to increase a physical density and decrease a thickness of said multilayer structure to form said supercapacitor electrode. Withdrawn
Layer stacks claimed or described, ordered top of device to substrate.
supercapacitor
lithium-ion capacitor or sodium-ion capacitor
Materials described outside the worked examples.
graphene sheets
cellulosic nanofibers
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 5(A) Ragone plots (gravimetric and volumetric power density vs. energy density) of symmetric supercapacitor (EDLC) cells containing isolated …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
electrode specific surface area (claimed range) | 50–3300 m2/g | graphene sheets |
electrode physical density (claimed range, claim 1) | 0.5–1.7 g/cm3 |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,957,495Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1(A) A flow chart illustrating various prior art processes of producing exfoliated graphite products (flexible graphite foils and expanded graphite flakes), …
FIG. 2 Schematic of a conventional activated carbon-based supercapacitor cell.
FIG. 3(A) Schematic drawing to illustrate an example of a compressing and consolidating operation (using a mold cavity cell equipped with a piston or ram) for …
FIG. 4(B) The electrode volumetric capacitance values of two series of supercapacitors (conventional and presently disclosed process; with or without CNF …
FIG. 5(A) Ragone plots (gravimetric and volumetric power density vs. energy density) of symmetric supercapacitor (EDLC) cells containing isolated …
FIG. 6 Ragone plots of two pristine graphene-based EDLC supercapacitors having graphene sheets parallel and perpendicular, respectively, to the current …
FIG. 7 Ragone plots of two graphene-conductive polymer redox supercapacitors (pseudo- capacitors) having graphene/sulfonated polyaniline (S-PANi) and …
FIG. 8 Ragone plots of lithium ion capacitor (LIC) cells containing pristine graphene sheets (with or without CNF spacers) as the cathode active material and …
FIG. 9 The cell-level gravimetric and volumetric energy densities plotted over the achievable electrode thickness range of the RGO-based EDLC supercapacitors …
FIG. 10 The cell-level gravimetric energy densities plotted over the achievable active material proportion (active material weight/total cell weight) in a …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A supercapacitor comprising an anode, a cathode, an ion-permeable separator disposed between said anode and said cathode, and an electrolyte in ionic contact with said anode and said cathode, wherein at least one of the anode and the cathode contains multiple graphene sheets spaced by cellulosic nanofibers and has a specific surface area from 50 to 3,300 m 2/g and wherein said at least one of the anode and the cathode has a physical density from 0.5 to 1.7 g/cm 3, and wherein said at least one of the anode and the cathode is capable of delivering a gravimetric specific capacitance greater than 210 F/g. Previously presented
The supercapacitor of claim 1, wherein said graphene sheets are selected from a pristine graphene or a non-pristine graphene material, having a content of non-carbon elements from 2% to 50% by weight, selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, chemically functionalized graphene, doped graphene, or a combination thereof. Original
The supercapacitor of claim 1, wherein said cellulosic nanofibers have a diameter from 1 nm to 100 nm. Original
The supercapacitor of claim 1, wherein said cellulosic nanofibers have a diameter from 2 nm to 10 nm. Original
The supercapacitor of claim 1, wherein said multiple graphene sheets are substantially aligned along a desired direction... Currently amended
The supercapacitor of claim 1, wherein said at least one of the anode and the cathode has a physical density from 0.7 to 1.3 g/cm 3. Original
The supercapacitor of claim 1, wherein said graphene sheets are deposited with a nanoscaled coating or particles of a redox pair partner selected from an intrinsically conductive polymer, a transition metal oxide, and/or an organic molecule, wherein said redox pair partner and said graphene sheets form a redox pair for pseudo-capacitance. Original
The supercapacitor of claim 1, wherein said electrolyte contains an aqueous electrolyte, an organic electrolyte, an inorganic electrolyte, an ionic liquid electrolyte, or a mixture of an organic and an ionic electrolyte. Original
The supercapacitor of claim 1, further comprising an anode current collector in electronic contact with said anode or a cathode current collector in electronic contact with said cathode. Original
The supercapacitor of claim 1, wherein both the anode and the cathode contain graphene sheets spaced by cellulosic nanofibers and have a specific surface area from 50 to 3,300 m 2/g. Original
The supercapacitor of claim 1, which is a lithium-ion capacitor or sodium-ion capacitor, wherein said cathode contains said cellulosic nanofiber-spaced graphene sheets and said anode contains a pre-lithiated anode active material or a pre- sodiated anode active material. Previously presented
A supercapacitor electrode containing an electrolyte-impregnated laminar structure containing multiple graphene sheets that are spaced by cellulosic nanofibers and having a specific surface area from 50 to 3,300 m 2/g, wherein said supercapacitor electrode contains a liquid or gel electrolyte residing in a space between graphene sheets, wherein said electrode provides a specific capacitance greater than 210 F/g. Previously presented
The supercapacitor electrode of claim 13, wherein said graphene sheets are selected from a pristine graphene or a non-pristine graphene material, having a content of non-carbon elements from 2% to 50% by weight, selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, chemically functionalized graphene, doped graphene, or a combination thereof. Original
The supercapacitor electrode of claim 13, wherein said cellulosic nanofibers have a diameter from 1 nm to 100 nm. Original
The supercapacitor electrode of claim 13, wherein said cellulosic nanofibers have a diameter from 2 nm to 10 nm. Original
The supercapacitor electrode of claim 13, wherein said graphene sheets are deposited with a nanoscaled coating or particles of a redox pair partner selected from an intrinsically conductive polymer, a transition metal oxide, and/or an organic molecule, wherein said redox pair partner and said graphene sheets form a redox pair for pseudo- capacitance. Original
The supercapacitor electrode of claim 13, wherein said multiple graphene sheets are substantially aligned along a desired direction, and wherein said electrode has a physical density from 0.5 to 1.7 g/cm 3. Original
The supercapacitor of claim 13, wherein said electrode has a physical density from 0.7 to 1.3 g/cm 3. Original
A process of producing the supercapacitor electrode of claim 13, said process comprising a) dispersing said multiple graphene sheets, said cellulosic nanofibers, an optional conductive additive, and an optional resin binder in a liquid medium to form a graphene slurry; b) dispensing and depositing said graphene slurry onto a surface of a solid substrate or a current collector and forming a wet graphene layer thereon which is optionally subjected to a compression treatment to align graphene sheets along a desired direction; c) at least partially removing said liquid medium from said wet graphene layer to form a dry graphene layer wherein multiple graphene sheets are spaced by said cellulosic nanofibers to form said supercapacitor electrode, and d) an optional compression treatment to increase a density of said supercapacitor electrode. Withdrawn
Canceled
A process of producing the supercapacitor electrode of claim 14, said process comprising (a) preparing a graphene dispersion having multiple isolated graphene sheets and cellulosic nanofibers dispersed in a liquid or gel electrolyte; and (b) subjecting said graphene dispersion to a forced assembly procedure, forcing said multiple graphene sheets and cellulosic nanofibers to assemble into an electrolyte-impregnated laminar graphene structure, wherein said multiple graphene sheets are alternately spaced by thin electrolyte layers having a thickness from 0.4 nm to 10 nm and having cellulosic nanofibers dispersed in said thin electrolyte layers and said multiple graphene sheets are substantially aligned along a desired direction, and wherein said laminar graphene structure has a physical density from 0.5 to 1.7 g/cm 3 and a specific surface area from 50 to 3,300 m 2/g, when measured in a dried state of said laminar structure with said electrolyte removed. Withdrawn
A process of producing a supercapacitor electrode, comprising stacking a current collector with at least a layer of said electrolyte-impregnated laminar graphene structure of claim 14 to form a multiple-layer structure and further comprising a step of compressing and consolidating said multi-layer structure to increase a physical density and decrease a thickness of said multilayer structure to form said supercapacitor electrode. Withdrawn
Layer stacks claimed or described, ordered top of device to substrate.
supercapacitor
lithium-ion capacitor or sodium-ion capacitor
Materials described outside the worked examples.
graphene sheets
cellulosic nanofibers
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 5(A) Ragone plots (gravimetric and volumetric power density vs. energy density) of symmetric supercapacitor (EDLC) cells containing isolated …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
electrode specific surface area (claimed range) | 50–3300 m2/g | graphene sheets |
electrode physical density (claimed range, claim 1) | 0.5–1.7 g/cm3 |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,957,495Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1(A) A flow chart illustrating various prior art processes of producing exfoliated graphite products (flexible graphite foils and expanded graphite flakes), …
FIG. 2 Schematic of a conventional activated carbon-based supercapacitor cell.
FIG. 3(A) Schematic drawing to illustrate an example of a compressing and consolidating operation (using a mold cavity cell equipped with a piston or ram) for …
FIG. 4(B) The electrode volumetric capacitance values of two series of supercapacitors (conventional and presently disclosed process; with or without CNF …
FIG. 5(A) Ragone plots (gravimetric and volumetric power density vs. energy density) of symmetric supercapacitor (EDLC) cells containing isolated …
FIG. 6 Ragone plots of two pristine graphene-based EDLC supercapacitors having graphene sheets parallel and perpendicular, respectively, to the current …
FIG. 7 Ragone plots of two graphene-conductive polymer redox supercapacitors (pseudo- capacitors) having graphene/sulfonated polyaniline (S-PANi) and …
FIG. 8 Ragone plots of lithium ion capacitor (LIC) cells containing pristine graphene sheets (with or without CNF spacers) as the cathode active material and …
FIG. 9 The cell-level gravimetric and volumetric energy densities plotted over the achievable electrode thickness range of the RGO-based EDLC supercapacitors …
FIG. 10 The cell-level gravimetric energy densities plotted over the achievable active material proportion (active material weight/total cell weight) in a …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A supercapacitor comprising an anode, a cathode, an ion-permeable separator disposed between said anode and said cathode, and an electrolyte in ionic contact with said anode and said cathode, wherein at least one of the anode and the cathode contains multiple graphene sheets spaced by cellulosic nanofibers and has a specific surface area from 50 to 3,300 m 2/g and wherein said at least one of the anode and the cathode has a physical density from 0.5 to 1.7 g/cm 3, and wherein said at least one of the anode and the cathode is capable of delivering a gravimetric specific capacitance greater than 210 F/g. Previously presented
The supercapacitor of claim 1, wherein said graphene sheets are selected from a pristine graphene or a non-pristine graphene material, having a content of non-carbon elements from 2% to 50% by weight, selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, chemically functionalized graphene, doped graphene, or a combination thereof. Original
The supercapacitor of claim 1, wherein said cellulosic nanofibers have a diameter from 1 nm to 100 nm. Original
The supercapacitor of claim 1, wherein said cellulosic nanofibers have a diameter from 2 nm to 10 nm. Original
The supercapacitor of claim 1, wherein said multiple graphene sheets are substantially aligned along a desired direction... Currently amended
The supercapacitor of claim 1, wherein said at least one of the anode and the cathode has a physical density from 0.7 to 1.3 g/cm 3. Original
The supercapacitor of claim 1, wherein said graphene sheets are deposited with a nanoscaled coating or particles of a redox pair partner selected from an intrinsically conductive polymer, a transition metal oxide, and/or an organic molecule, wherein said redox pair partner and said graphene sheets form a redox pair for pseudo-capacitance. Original
The supercapacitor of claim 1, wherein said electrolyte contains an aqueous electrolyte, an organic electrolyte, an inorganic electrolyte, an ionic liquid electrolyte, or a mixture of an organic and an ionic electrolyte. Original
The supercapacitor of claim 1, further comprising an anode current collector in electronic contact with said anode or a cathode current collector in electronic contact with said cathode. Original
The supercapacitor of claim 1, wherein both the anode and the cathode contain graphene sheets spaced by cellulosic nanofibers and have a specific surface area from 50 to 3,300 m 2/g. Original
The supercapacitor of claim 1, which is a lithium-ion capacitor or sodium-ion capacitor, wherein said cathode contains said cellulosic nanofiber-spaced graphene sheets and said anode contains a pre-lithiated anode active material or a pre- sodiated anode active material. Previously presented
A supercapacitor electrode containing an electrolyte-impregnated laminar structure containing multiple graphene sheets that are spaced by cellulosic nanofibers and having a specific surface area from 50 to 3,300 m 2/g, wherein said supercapacitor electrode contains a liquid or gel electrolyte residing in a space between graphene sheets, wherein said electrode provides a specific capacitance greater than 210 F/g. Previously presented
The supercapacitor electrode of claim 13, wherein said graphene sheets are selected from a pristine graphene or a non-pristine graphene material, having a content of non-carbon elements from 2% to 50% by weight, selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, chemically functionalized graphene, doped graphene, or a combination thereof. Original
The supercapacitor electrode of claim 13, wherein said cellulosic nanofibers have a diameter from 1 nm to 100 nm. Original
The supercapacitor electrode of claim 13, wherein said cellulosic nanofibers have a diameter from 2 nm to 10 nm. Original
The supercapacitor electrode of claim 13, wherein said graphene sheets are deposited with a nanoscaled coating or particles of a redox pair partner selected from an intrinsically conductive polymer, a transition metal oxide, and/or an organic molecule, wherein said redox pair partner and said graphene sheets form a redox pair for pseudo- capacitance. Original
The supercapacitor electrode of claim 13, wherein said multiple graphene sheets are substantially aligned along a desired direction, and wherein said electrode has a physical density from 0.5 to 1.7 g/cm 3. Original
The supercapacitor of claim 13, wherein said electrode has a physical density from 0.7 to 1.3 g/cm 3. Original
A process of producing the supercapacitor electrode of claim 13, said process comprising a) dispersing said multiple graphene sheets, said cellulosic nanofibers, an optional conductive additive, and an optional resin binder in a liquid medium to form a graphene slurry; b) dispensing and depositing said graphene slurry onto a surface of a solid substrate or a current collector and forming a wet graphene layer thereon which is optionally subjected to a compression treatment to align graphene sheets along a desired direction; c) at least partially removing said liquid medium from said wet graphene layer to form a dry graphene layer wherein multiple graphene sheets are spaced by said cellulosic nanofibers to form said supercapacitor electrode, and d) an optional compression treatment to increase a density of said supercapacitor electrode. Withdrawn
Canceled
A process of producing the supercapacitor electrode of claim 14, said process comprising (a) preparing a graphene dispersion having multiple isolated graphene sheets and cellulosic nanofibers dispersed in a liquid or gel electrolyte; and (b) subjecting said graphene dispersion to a forced assembly procedure, forcing said multiple graphene sheets and cellulosic nanofibers to assemble into an electrolyte-impregnated laminar graphene structure, wherein said multiple graphene sheets are alternately spaced by thin electrolyte layers having a thickness from 0.4 nm to 10 nm and having cellulosic nanofibers dispersed in said thin electrolyte layers and said multiple graphene sheets are substantially aligned along a desired direction, and wherein said laminar graphene structure has a physical density from 0.5 to 1.7 g/cm 3 and a specific surface area from 50 to 3,300 m 2/g, when measured in a dried state of said laminar structure with said electrolyte removed. Withdrawn
A process of producing a supercapacitor electrode, comprising stacking a current collector with at least a layer of said electrolyte-impregnated laminar graphene structure of claim 14 to form a multiple-layer structure and further comprising a step of compressing and consolidating said multi-layer structure to increase a physical density and decrease a thickness of said multilayer structure to form said supercapacitor electrode. Withdrawn
Layer stacks claimed or described, ordered top of device to substrate.
supercapacitor
lithium-ion capacitor or sodium-ion capacitor
Materials described outside the worked examples.
graphene sheets
cellulosic nanofibers
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 5(A) Ragone plots (gravimetric and volumetric power density vs. energy density) of symmetric supercapacitor (EDLC) cells containing isolated …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
electrode specific surface area (claimed range) | 50–3300 m2/g | graphene sheets |
electrode physical density (claimed range, claim 1) | 0.5–1.7 g/cm3 |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,957,495Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1(A) A flow chart illustrating various prior art processes of producing exfoliated graphite products (flexible graphite foils and expanded graphite flakes), …
FIG. 2 Schematic of a conventional activated carbon-based supercapacitor cell.
FIG. 3(A) Schematic drawing to illustrate an example of a compressing and consolidating operation (using a mold cavity cell equipped with a piston or ram) for …
FIG. 4(B) The electrode volumetric capacitance values of two series of supercapacitors (conventional and presently disclosed process; with or without CNF …
FIG. 5(A) Ragone plots (gravimetric and volumetric power density vs. energy density) of symmetric supercapacitor (EDLC) cells containing isolated …
FIG. 6 Ragone plots of two pristine graphene-based EDLC supercapacitors having graphene sheets parallel and perpendicular, respectively, to the current …
FIG. 7 Ragone plots of two graphene-conductive polymer redox supercapacitors (pseudo- capacitors) having graphene/sulfonated polyaniline (S-PANi) and …
FIG. 8 Ragone plots of lithium ion capacitor (LIC) cells containing pristine graphene sheets (with or without CNF spacers) as the cathode active material and …
FIG. 9 The cell-level gravimetric and volumetric energy densities plotted over the achievable electrode thickness range of the RGO-based EDLC supercapacitors …
FIG. 10 The cell-level gravimetric energy densities plotted over the achievable active material proportion (active material weight/total cell weight) in a …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A supercapacitor comprising an anode, a cathode, an ion-permeable separator disposed between said anode and said cathode, and an electrolyte in ionic contact with said anode and said cathode, wherein at least one of the anode and the cathode contains multiple graphene sheets spaced by cellulosic nanofibers and has a specific surface area from 50 to 3,300 m 2/g and wherein said at least one of the anode and the cathode has a physical density from 0.5 to 1.7 g/cm 3, and wherein said at least one of the anode and the cathode is capable of delivering a gravimetric specific capacitance greater than 210 F/g. Previously presented
The supercapacitor of claim 1, wherein said graphene sheets are selected from a pristine graphene or a non-pristine graphene material, having a content of non-carbon elements from 2% to 50% by weight, selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, chemically functionalized graphene, doped graphene, or a combination thereof. Original
The supercapacitor of claim 1, wherein said cellulosic nanofibers have a diameter from 1 nm to 100 nm. Original
The supercapacitor of claim 1, wherein said cellulosic nanofibers have a diameter from 2 nm to 10 nm. Original
The supercapacitor of claim 1, wherein said multiple graphene sheets are substantially aligned along a desired direction... Currently amended
The supercapacitor of claim 1, wherein said at least one of the anode and the cathode has a physical density from 0.7 to 1.3 g/cm 3. Original
The supercapacitor of claim 1, wherein said graphene sheets are deposited with a nanoscaled coating or particles of a redox pair partner selected from an intrinsically conductive polymer, a transition metal oxide, and/or an organic molecule, wherein said redox pair partner and said graphene sheets form a redox pair for pseudo-capacitance. Original
The supercapacitor of claim 1, wherein said electrolyte contains an aqueous electrolyte, an organic electrolyte, an inorganic electrolyte, an ionic liquid electrolyte, or a mixture of an organic and an ionic electrolyte. Original
The supercapacitor of claim 1, further comprising an anode current collector in electronic contact with said anode or a cathode current collector in electronic contact with said cathode. Original
The supercapacitor of claim 1, wherein both the anode and the cathode contain graphene sheets spaced by cellulosic nanofibers and have a specific surface area from 50 to 3,300 m 2/g. Original
The supercapacitor of claim 1, which is a lithium-ion capacitor or sodium-ion capacitor, wherein said cathode contains said cellulosic nanofiber-spaced graphene sheets and said anode contains a pre-lithiated anode active material or a pre- sodiated anode active material. Previously presented
A supercapacitor electrode containing an electrolyte-impregnated laminar structure containing multiple graphene sheets that are spaced by cellulosic nanofibers and having a specific surface area from 50 to 3,300 m 2/g, wherein said supercapacitor electrode contains a liquid or gel electrolyte residing in a space between graphene sheets, wherein said electrode provides a specific capacitance greater than 210 F/g. Previously presented
The supercapacitor electrode of claim 13, wherein said graphene sheets are selected from a pristine graphene or a non-pristine graphene material, having a content of non-carbon elements from 2% to 50% by weight, selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, chemically functionalized graphene, doped graphene, or a combination thereof. Original
The supercapacitor electrode of claim 13, wherein said cellulosic nanofibers have a diameter from 1 nm to 100 nm. Original
The supercapacitor electrode of claim 13, wherein said cellulosic nanofibers have a diameter from 2 nm to 10 nm. Original
The supercapacitor electrode of claim 13, wherein said graphene sheets are deposited with a nanoscaled coating or particles of a redox pair partner selected from an intrinsically conductive polymer, a transition metal oxide, and/or an organic molecule, wherein said redox pair partner and said graphene sheets form a redox pair for pseudo- capacitance. Original
The supercapacitor electrode of claim 13, wherein said multiple graphene sheets are substantially aligned along a desired direction, and wherein said electrode has a physical density from 0.5 to 1.7 g/cm 3. Original
The supercapacitor of claim 13, wherein said electrode has a physical density from 0.7 to 1.3 g/cm 3. Original
A process of producing the supercapacitor electrode of claim 13, said process comprising a) dispersing said multiple graphene sheets, said cellulosic nanofibers, an optional conductive additive, and an optional resin binder in a liquid medium to form a graphene slurry; b) dispensing and depositing said graphene slurry onto a surface of a solid substrate or a current collector and forming a wet graphene layer thereon which is optionally subjected to a compression treatment to align graphene sheets along a desired direction; c) at least partially removing said liquid medium from said wet graphene layer to form a dry graphene layer wherein multiple graphene sheets are spaced by said cellulosic nanofibers to form said supercapacitor electrode, and d) an optional compression treatment to increase a density of said supercapacitor electrode. Withdrawn
Canceled
A process of producing the supercapacitor electrode of claim 14, said process comprising (a) preparing a graphene dispersion having multiple isolated graphene sheets and cellulosic nanofibers dispersed in a liquid or gel electrolyte; and (b) subjecting said graphene dispersion to a forced assembly procedure, forcing said multiple graphene sheets and cellulosic nanofibers to assemble into an electrolyte-impregnated laminar graphene structure, wherein said multiple graphene sheets are alternately spaced by thin electrolyte layers having a thickness from 0.4 nm to 10 nm and having cellulosic nanofibers dispersed in said thin electrolyte layers and said multiple graphene sheets are substantially aligned along a desired direction, and wherein said laminar graphene structure has a physical density from 0.5 to 1.7 g/cm 3 and a specific surface area from 50 to 3,300 m 2/g, when measured in a dried state of said laminar structure with said electrolyte removed. Withdrawn
A process of producing a supercapacitor electrode, comprising stacking a current collector with at least a layer of said electrolyte-impregnated laminar graphene structure of claim 14 to form a multiple-layer structure and further comprising a step of compressing and consolidating said multi-layer structure to increase a physical density and decrease a thickness of said multilayer structure to form said supercapacitor electrode. Withdrawn
Layer stacks claimed or described, ordered top of device to substrate.
supercapacitor
lithium-ion capacitor or sodium-ion capacitor
Materials described outside the worked examples.
graphene sheets
cellulosic nanofibers
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 5(A) Ragone plots (gravimetric and volumetric power density vs. energy density) of symmetric supercapacitor (EDLC) cells containing isolated …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
electrode specific surface area (claimed range) | 50–3300 m2/g | graphene sheets |
electrode physical density (claimed range, claim 1) | 0.5–1.7 g/cm3 |
Related documents with shared materials, methods, properties, or citations.
supercapacitor electrode (electrolyte-impregnated laminar graphene structure)
graphene oxide
reduced graphene oxide
graphene fluoride
graphene chloride
graphene bromide
graphene iodide
hydrogenated graphene
nitrogenated graphene
doped graphene
intrinsically conducting polymer
FIG. 9 The cell-level gravimetric and volumetric energy densities plotted over the achievable electrode thickness range of the RGO-based EDLC supercapacitors …
gravimetric specific capacitance (claimed minimum) | ≥ 210 F/g | — |
electrode physical density (claimed range, claim 6) | 0.7–1.3 g/cm3 | — |
Thickness | 1–100 nm | — |
Thickness | 2–10 nm | — |
Thickness | 0.4–10 nm | — |
Duration | 15–120 s | — |
Duration | 900–7200 s | — |
Thickness | 0.5–10 nm | — |
Thickness | 10–10000000 nm | — |
Duration | 1–4 hours | — |
Duration | 0.5–96 hours | — |
Duration | 48–72 hours | — |
Thickness | 2–20 nm | — |
Thickness | 2–5 nm | — |
Thickness | 3–4 nm | — |
Thickness | 20–100 nm | — |
Thickness | 5–10 nm | — |
Thickness | 50–200 nm | — |
Temperature | 200–400 °C | — |
Temperature | 150–250 °C | — |
Temperature | 800–1050 °C | — |
Duration | 5–16 hours | — |
Duration | 48–96 hours | — |
Duration | 10–100 minutes | — |
Thickness | ≤ 5 nm | — |
Thickness | ≤ 2 nm | — |
Thickness | ≤ 10 nm | — |
Thickness | ≥ 2 nm | — |
Thickness | ≥ 1 nm | — |
Thickness | 2–100 nm | — |
supercapacitor electrode (electrolyte-impregnated laminar graphene structure)
graphene oxide
reduced graphene oxide
graphene fluoride
graphene chloride
graphene bromide
graphene iodide
hydrogenated graphene
nitrogenated graphene
doped graphene
intrinsically conducting polymer
FIG. 9 The cell-level gravimetric and volumetric energy densities plotted over the achievable electrode thickness range of the RGO-based EDLC supercapacitors …
gravimetric specific capacitance (claimed minimum) | ≥ 210 F/g | — |
electrode physical density (claimed range, claim 6) | 0.7–1.3 g/cm3 | — |
Thickness | 1–100 nm | — |
Thickness | 2–10 nm | — |
Thickness | 0.4–10 nm | — |
Duration | 15–120 s | — |
Duration | 900–7200 s | — |
Thickness | 0.5–10 nm | — |
Thickness | 10–10000000 nm | — |
Duration | 1–4 hours | — |
Duration | 0.5–96 hours | — |
Duration | 48–72 hours | — |
Thickness | 2–20 nm | — |
Thickness | 2–5 nm | — |
Thickness | 3–4 nm | — |
Thickness | 20–100 nm | — |
Thickness | 5–10 nm | — |
Thickness | 50–200 nm | — |
Temperature | 200–400 °C | — |
Temperature | 150–250 °C | — |
Temperature | 800–1050 °C | — |
Duration | 5–16 hours | — |
Duration | 48–96 hours | — |
Duration | 10–100 minutes | — |
Thickness | ≤ 5 nm | — |
Thickness | ≤ 2 nm | — |
Thickness | ≤ 10 nm | — |
Thickness | ≥ 2 nm | — |
Thickness | ≥ 1 nm | — |
Thickness | 2–100 nm | — |
supercapacitor electrode (electrolyte-impregnated laminar graphene structure)
graphene oxide
reduced graphene oxide
graphene fluoride
graphene chloride
graphene bromide
graphene iodide
hydrogenated graphene
nitrogenated graphene
doped graphene
intrinsically conducting polymer
FIG. 9 The cell-level gravimetric and volumetric energy densities plotted over the achievable electrode thickness range of the RGO-based EDLC supercapacitors …
gravimetric specific capacitance (claimed minimum) | ≥ 210 F/g | — |
electrode physical density (claimed range, claim 6) | 0.7–1.3 g/cm3 | — |
Thickness | 1–100 nm | — |
Thickness | 2–10 nm | — |
Thickness | 0.4–10 nm | — |
Duration | 15–120 s | — |
Duration | 900–7200 s | — |
Thickness | 0.5–10 nm | — |
Thickness | 10–10000000 nm | — |
Duration | 1–4 hours | — |
Duration | 0.5–96 hours | — |
Duration | 48–72 hours | — |
Thickness | 2–20 nm | — |
Thickness | 2–5 nm | — |
Thickness | 3–4 nm | — |
Thickness | 20–100 nm | — |
Thickness | 5–10 nm | — |
Thickness | 50–200 nm | — |
Temperature | 200–400 °C | — |
Temperature | 150–250 °C | — |
Temperature | 800–1050 °C | — |
Duration | 5–16 hours | — |
Duration | 48–96 hours | — |
Duration | 10–100 minutes | — |
Thickness | ≤ 5 nm | — |
Thickness | ≤ 2 nm | — |
Thickness | ≤ 10 nm | — |
Thickness | ≥ 2 nm | — |
Thickness | ≥ 1 nm | — |
Thickness | 2–100 nm | — |
supercapacitor electrode (electrolyte-impregnated laminar graphene structure)
graphene oxide
reduced graphene oxide
graphene fluoride
graphene chloride
graphene bromide
graphene iodide
hydrogenated graphene
nitrogenated graphene
doped graphene
intrinsically conducting polymer
FIG. 9 The cell-level gravimetric and volumetric energy densities plotted over the achievable electrode thickness range of the RGO-based EDLC supercapacitors …
gravimetric specific capacitance (claimed minimum) | ≥ 210 F/g | — |
electrode physical density (claimed range, claim 6) | 0.7–1.3 g/cm3 | — |
Thickness | 1–100 nm | — |
Thickness | 2–10 nm | — |
Thickness | 0.4–10 nm | — |
Duration | 15–120 s | — |
Duration | 900–7200 s | — |
Thickness | 0.5–10 nm | — |
Thickness | 10–10000000 nm | — |
Duration | 1–4 hours | — |
Duration | 0.5–96 hours | — |
Duration | 48–72 hours | — |
Thickness | 2–20 nm | — |
Thickness | 2–5 nm | — |
Thickness | 3–4 nm | — |
Thickness | 20–100 nm | — |
Thickness | 5–10 nm | — |
Thickness | 50–200 nm | — |
Temperature | 200–400 °C | — |
Temperature | 150–250 °C | — |
Temperature | 800–1050 °C | — |
Duration | 5–16 hours | — |
Duration | 48–96 hours | — |
Duration | 10–100 minutes | — |
Thickness | ≤ 5 nm | — |
Thickness | ≤ 2 nm | — |
Thickness | ≤ 10 nm | — |
Thickness | ≥ 2 nm | — |
Thickness | ≥ 1 nm | — |
Thickness | 2–100 nm | — |