Patent
US 9,053,870Supercapacitor with a Meso-porous Nano Graphene Electrode
Zhenning Yu, Chen-guang Liu, David Neff, Aruna Zhamu et al.
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 9,053,870Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 (a) A scanning electron microscopic image of curved NGPs that are particularly amenable to forming desired meso-pores when these NGPs are packed together …
FIG.2 (a) Nitrogen adsorption isotherms, and (b) Pore size distribution of the meso-porous graphene material.
FIG.3 (a) Galvanostatic charge-discharge curve of a curved graphene electrode (6.6 mg each) at a constant current density of 1 A/g, using EMIMBF₄ ionic liquid …
FIG. 4. (a) Relationship between the energy density and current density of a curved graphene electrode in EM I MBF₄ ionic liquid electrolyte, (b) Ragone plot …
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 a first electrode, a second electrode, a porous separator disposed between the first and the second electrode, and an ionic liquid electrolyte in physical contact with the two electrodes, wherein at least one of the two electrodes comprises a meso-porous structure being formed of a plurality of curved nano graphene platelets or sheets that are packed to prevent graphene re-stacking and to form said meso-porous structure havingmultiple inter-layer pores between the graphene sheets having a pore size in the range of 2 n m and 25 n m, which are accessible to said ionic liquid electrolyte and wherein said nano graphene platelets or sheets are activated to form activated platelets or sheets.
The supercapacitor of claim 1 wherein said multiple pores have a pore size in the range of 3 n m and 25 rnm.
The supercapacitor of claim 1 wherein said multiple pores have a pore size in the range of 4 nm and 15 nm.
(Previously amended) The supercapacitor of claim 1 wherein both of the first electrode and the second electrode comprise a meso-porous structure being formed of a plurality of curved nano graphene platelets or sheets that are packed to prevent graphene re-stacking and to form said meso-porous structure havin g_ multiple inter-layer pores between the graphene sheets having a pore size in the range of 2 nm and 25 n m, which are accessible to said ionic liquid electrolyte.
The supercapacitor of claim 1 wherein said ionic liquid is a room temperature ionic liquid.
The supercapacitor of claim 1 wherein said ionic liquid has a molecular size smaller than a pore size of the multiple pores.
The supercapacitor of claim 1 wherein a pore size of the multiple pores is at least three times greater than a molecular size of the ionic liquid.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets comprise single-layer graphene.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets comprise an oxidized graphene or graphene oxide sheet.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets comprise a chemically or thermally reduced graphene oxide sheet.
The supercapacitor of claim 1 wherein said at least one of the electrodes further comprises a nano material selected from a carbon nano-tube, carbon nano-fiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber, or a combination thereof.
The supercapacitor of claim 1 wherein at least one of the electrodes further comprises a material selected from the group consisting of Ru O 2, IrO 2, NiO, Mn O 2, VO, TiO 2, Cr₂ O 3, C o20 3, Pb O 2, Ag₂ O, MoC X, Mo₂N, WC, WN X, a transition metal oxide, and combinations thereof.
(Previously amended) The supercapacitor of claim 1 wherein said at least one of the electrodes further comprises a conductive polymer that forms a redox pair with a nano graphene platelet or sheet.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets are functionalized.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets are functionalized with one or more functional groups selected from the group consisting of --S O 3, --R'COX, --R'(C OO H)2, --CN, --R'CH₂X, --OH, --R'CHO, --R'CN, wherein R' is a hydrocarbon radical, and wherein X is --NH2,-- OH, or a halogen.
(Previously amended) The supercapacitor of claim 1 wherein said supercapacitor provides an energy density of no less than 50 Wh/k g based on the total electrode weight.
(Previously amended) The supercapacitor of claim 1 wherein said supercapacitor provides a specific capacitance from 100 to 250 F/g.
The supercapacitor of claim 1 wherein said ionic liquid is operated up to at least 3.5 volts.
The supercapacitor of claim 1 wherein said ionic liquid is operated up to at least 4.5 volts.
. canceled
The supercapacitor of claim 14 1 wherein said activated platelets or sheets are functionalized.
A supercapacitor comprising a first electrode, a second electrode, a porous separator disposed between the first and the second electrode, and an ionic liquid electrolyte in physical contact with the two electrodes, wherein at least one of the two electrodes comprises a mes o -porous structure being formed of a plurality of curved nano graphene platelets or sheets that prevent graphene re-stacking and that are packed to form said meso-porous structure containing multiple inter-layer pores between the graphene sheets having a pore size in the range of 2 nm and 25 nm which are accessible to said ionic liquid electrolyte, wherein said graphene platelets or sheets are not spacer-modified or surface-modified platelets or sheets and wherein said nano graphene platelets or sheets are either activated to form activated platelets or sheets or f u nctionalized with one or more functional groups selected from the group consisting of --SO -. --R'COX, -- R'(COOH). --CN, --R'CH 2X, --OH, --R'CHO, --R 'CN, wherein R' is a hydrocarbon radical, and wherein X is --NH 2, -- OH, or a halogen.
(Previously amended) The supercapacitor of claim 22, wherein both first and second electrodes comprise a meso-porous structure being formed of a plurality of curved nano graphene platelets or sheets that prevent graphene re-stacking and that are packed to form said meso-porous structure containing multiple inter-layer pores between the graphene sheets having a pore size in the range of 2 nm and 25 nm which are accessible to said ionic liquid electrolyte, wherein said graphene platelets or sheets are not spacer-modified or surface-modified platelets or sheets.
The supercapacitor of claim 22 wherein said ionic liquid is a room temperature ionic liquid.
The supercapacitor of claim 22 wherein a pore size of the multiple pores is at least three times greater than a molecular size of the ionic liquid.
(Previously amended) The supercapacitor of claim 22 wherein said nano graphene platelets or sheets comprise single-layer graphene or graphene oxide.
The supercapacitor of claim 22 wherein at least one of the electrodes further comprises a material selected from the group consisting of Ru O 2, IrO 2, NiO, Mn O 2, V OX, TiO 2, Cr₂ O 3, C 0 203, Pb O 2, A g20, MoC X, Mo₂N, WC X, WN X, a transition metal oxide, and combinations thereof.
(Previously amended) The supercapacitor of claim 22 wherein said at least one of the electrodes further comprises a conductive polymer that forms a redox pair with a nano graphene platelet or sheets.
The supercapacitor of claim 22 wherein said nano graphene platelets or sheets are activated to form activated graphene platelets or sheets. canceled
(Previously amended) The supercapacitor of claim 22 wherein said nano graphene platelets or sheets ar e functionalized.
80285208 (2008/0285208).
5169 (US 6,665,169).
Layer stacks claimed or described, ordered top of device to substrate.
supercapacitor with meso-porous nano graphene electrode
Materials described outside the worked examples.
curved nano graphene platelets or sheets
activated nano graphene platelets or sheets
ionic liquid electrolyte
Measurements and analyses referenced in the patent, with their drawing references.
FIG.1 (a) A scanning electron microscopic image of curved NGPs that are particularly amenable to forming desired meso-pores when these NGPs are packed together …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Energy Density | ≥ 50 Wh/kg | — |
Specific Capacitance | 100–250 F/g | — |
Specific Surface Area |
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MULTI-LAYERED GRAPHENE FILMS, ENERGY STORAGE DEVICES USING MULTI-LAYERED GRAPHENE FILMS AS ELECTRODES, AND METHODS OF MANUFACTURING MULTI-LAYERED GRAPHENE FILMS AND ENERGY STORAGE DEVICES
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US 9,053,870Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 (a) A scanning electron microscopic image of curved NGPs that are particularly amenable to forming desired meso-pores when these NGPs are packed together …
FIG.2 (a) Nitrogen adsorption isotherms, and (b) Pore size distribution of the meso-porous graphene material.
FIG.3 (a) Galvanostatic charge-discharge curve of a curved graphene electrode (6.6 mg each) at a constant current density of 1 A/g, using EMIMBF₄ ionic liquid …
FIG. 4. (a) Relationship between the energy density and current density of a curved graphene electrode in EM I MBF₄ ionic liquid electrolyte, (b) Ragone plot …
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 a first electrode, a second electrode, a porous separator disposed between the first and the second electrode, and an ionic liquid electrolyte in physical contact with the two electrodes, wherein at least one of the two electrodes comprises a meso-porous structure being formed of a plurality of curved nano graphene platelets or sheets that are packed to prevent graphene re-stacking and to form said meso-porous structure havingmultiple inter-layer pores between the graphene sheets having a pore size in the range of 2 n m and 25 n m, which are accessible to said ionic liquid electrolyte and wherein said nano graphene platelets or sheets are activated to form activated platelets or sheets.
The supercapacitor of claim 1 wherein said multiple pores have a pore size in the range of 3 n m and 25 rnm.
The supercapacitor of claim 1 wherein said multiple pores have a pore size in the range of 4 nm and 15 nm.
(Previously amended) The supercapacitor of claim 1 wherein both of the first electrode and the second electrode comprise a meso-porous structure being formed of a plurality of curved nano graphene platelets or sheets that are packed to prevent graphene re-stacking and to form said meso-porous structure havin g_ multiple inter-layer pores between the graphene sheets having a pore size in the range of 2 nm and 25 n m, which are accessible to said ionic liquid electrolyte.
The supercapacitor of claim 1 wherein said ionic liquid is a room temperature ionic liquid.
The supercapacitor of claim 1 wherein said ionic liquid has a molecular size smaller than a pore size of the multiple pores.
The supercapacitor of claim 1 wherein a pore size of the multiple pores is at least three times greater than a molecular size of the ionic liquid.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets comprise single-layer graphene.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets comprise an oxidized graphene or graphene oxide sheet.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets comprise a chemically or thermally reduced graphene oxide sheet.
The supercapacitor of claim 1 wherein said at least one of the electrodes further comprises a nano material selected from a carbon nano-tube, carbon nano-fiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber, or a combination thereof.
The supercapacitor of claim 1 wherein at least one of the electrodes further comprises a material selected from the group consisting of Ru O 2, IrO 2, NiO, Mn O 2, VO, TiO 2, Cr₂ O 3, C o20 3, Pb O 2, Ag₂ O, MoC X, Mo₂N, WC, WN X, a transition metal oxide, and combinations thereof.
(Previously amended) The supercapacitor of claim 1 wherein said at least one of the electrodes further comprises a conductive polymer that forms a redox pair with a nano graphene platelet or sheet.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets are functionalized.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets are functionalized with one or more functional groups selected from the group consisting of --S O 3, --R'COX, --R'(C OO H)2, --CN, --R'CH₂X, --OH, --R'CHO, --R'CN, wherein R' is a hydrocarbon radical, and wherein X is --NH2,-- OH, or a halogen.
(Previously amended) The supercapacitor of claim 1 wherein said supercapacitor provides an energy density of no less than 50 Wh/k g based on the total electrode weight.
(Previously amended) The supercapacitor of claim 1 wherein said supercapacitor provides a specific capacitance from 100 to 250 F/g.
The supercapacitor of claim 1 wherein said ionic liquid is operated up to at least 3.5 volts.
The supercapacitor of claim 1 wherein said ionic liquid is operated up to at least 4.5 volts.
. canceled
The supercapacitor of claim 14 1 wherein said activated platelets or sheets are functionalized.
A supercapacitor comprising a first electrode, a second electrode, a porous separator disposed between the first and the second electrode, and an ionic liquid electrolyte in physical contact with the two electrodes, wherein at least one of the two electrodes comprises a mes o -porous structure being formed of a plurality of curved nano graphene platelets or sheets that prevent graphene re-stacking and that are packed to form said meso-porous structure containing multiple inter-layer pores between the graphene sheets having a pore size in the range of 2 nm and 25 nm which are accessible to said ionic liquid electrolyte, wherein said graphene platelets or sheets are not spacer-modified or surface-modified platelets or sheets and wherein said nano graphene platelets or sheets are either activated to form activated platelets or sheets or f u nctionalized with one or more functional groups selected from the group consisting of --SO -. --R'COX, -- R'(COOH). --CN, --R'CH 2X, --OH, --R'CHO, --R 'CN, wherein R' is a hydrocarbon radical, and wherein X is --NH 2, -- OH, or a halogen.
(Previously amended) The supercapacitor of claim 22, wherein both first and second electrodes comprise a meso-porous structure being formed of a plurality of curved nano graphene platelets or sheets that prevent graphene re-stacking and that are packed to form said meso-porous structure containing multiple inter-layer pores between the graphene sheets having a pore size in the range of 2 nm and 25 nm which are accessible to said ionic liquid electrolyte, wherein said graphene platelets or sheets are not spacer-modified or surface-modified platelets or sheets.
The supercapacitor of claim 22 wherein said ionic liquid is a room temperature ionic liquid.
The supercapacitor of claim 22 wherein a pore size of the multiple pores is at least three times greater than a molecular size of the ionic liquid.
(Previously amended) The supercapacitor of claim 22 wherein said nano graphene platelets or sheets comprise single-layer graphene or graphene oxide.
The supercapacitor of claim 22 wherein at least one of the electrodes further comprises a material selected from the group consisting of Ru O 2, IrO 2, NiO, Mn O 2, V OX, TiO 2, Cr₂ O 3, C 0 203, Pb O 2, A g20, MoC X, Mo₂N, WC X, WN X, a transition metal oxide, and combinations thereof.
(Previously amended) The supercapacitor of claim 22 wherein said at least one of the electrodes further comprises a conductive polymer that forms a redox pair with a nano graphene platelet or sheets.
The supercapacitor of claim 22 wherein said nano graphene platelets or sheets are activated to form activated graphene platelets or sheets. canceled
(Previously amended) The supercapacitor of claim 22 wherein said nano graphene platelets or sheets ar e functionalized.
80285208 (2008/0285208).
5169 (US 6,665,169).
Layer stacks claimed or described, ordered top of device to substrate.
supercapacitor with meso-porous nano graphene electrode
Materials described outside the worked examples.
curved nano graphene platelets or sheets
activated nano graphene platelets or sheets
ionic liquid electrolyte
Measurements and analyses referenced in the patent, with their drawing references.
FIG.1 (a) A scanning electron microscopic image of curved NGPs that are particularly amenable to forming desired meso-pores when these NGPs are packed together …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Energy Density | ≥ 50 Wh/kg | — |
Specific Capacitance | 100–250 F/g | — |
Specific Surface Area |
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MULTI-LAYERED GRAPHENE FILMS, ENERGY STORAGE DEVICES USING MULTI-LAYERED GRAPHENE FILMS AS ELECTRODES, AND METHODS OF MANUFACTURING MULTI-LAYERED GRAPHENE FILMS AND ENERGY STORAGE DEVICES
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Patent
Atlas literature
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US 9,053,870Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 (a) A scanning electron microscopic image of curved NGPs that are particularly amenable to forming desired meso-pores when these NGPs are packed together …
FIG.2 (a) Nitrogen adsorption isotherms, and (b) Pore size distribution of the meso-porous graphene material.
FIG.3 (a) Galvanostatic charge-discharge curve of a curved graphene electrode (6.6 mg each) at a constant current density of 1 A/g, using EMIMBF₄ ionic liquid …
FIG. 4. (a) Relationship between the energy density and current density of a curved graphene electrode in EM I MBF₄ ionic liquid electrolyte, (b) Ragone plot …
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 a first electrode, a second electrode, a porous separator disposed between the first and the second electrode, and an ionic liquid electrolyte in physical contact with the two electrodes, wherein at least one of the two electrodes comprises a meso-porous structure being formed of a plurality of curved nano graphene platelets or sheets that are packed to prevent graphene re-stacking and to form said meso-porous structure havingmultiple inter-layer pores between the graphene sheets having a pore size in the range of 2 n m and 25 n m, which are accessible to said ionic liquid electrolyte and wherein said nano graphene platelets or sheets are activated to form activated platelets or sheets.
The supercapacitor of claim 1 wherein said multiple pores have a pore size in the range of 3 n m and 25 rnm.
The supercapacitor of claim 1 wherein said multiple pores have a pore size in the range of 4 nm and 15 nm.
(Previously amended) The supercapacitor of claim 1 wherein both of the first electrode and the second electrode comprise a meso-porous structure being formed of a plurality of curved nano graphene platelets or sheets that are packed to prevent graphene re-stacking and to form said meso-porous structure havin g_ multiple inter-layer pores between the graphene sheets having a pore size in the range of 2 nm and 25 n m, which are accessible to said ionic liquid electrolyte.
The supercapacitor of claim 1 wherein said ionic liquid is a room temperature ionic liquid.
The supercapacitor of claim 1 wherein said ionic liquid has a molecular size smaller than a pore size of the multiple pores.
The supercapacitor of claim 1 wherein a pore size of the multiple pores is at least three times greater than a molecular size of the ionic liquid.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets comprise single-layer graphene.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets comprise an oxidized graphene or graphene oxide sheet.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets comprise a chemically or thermally reduced graphene oxide sheet.
The supercapacitor of claim 1 wherein said at least one of the electrodes further comprises a nano material selected from a carbon nano-tube, carbon nano-fiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber, or a combination thereof.
The supercapacitor of claim 1 wherein at least one of the electrodes further comprises a material selected from the group consisting of Ru O 2, IrO 2, NiO, Mn O 2, VO, TiO 2, Cr₂ O 3, C o20 3, Pb O 2, Ag₂ O, MoC X, Mo₂N, WC, WN X, a transition metal oxide, and combinations thereof.
(Previously amended) The supercapacitor of claim 1 wherein said at least one of the electrodes further comprises a conductive polymer that forms a redox pair with a nano graphene platelet or sheet.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets are functionalized.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets are functionalized with one or more functional groups selected from the group consisting of --S O 3, --R'COX, --R'(C OO H)2, --CN, --R'CH₂X, --OH, --R'CHO, --R'CN, wherein R' is a hydrocarbon radical, and wherein X is --NH2,-- OH, or a halogen.
(Previously amended) The supercapacitor of claim 1 wherein said supercapacitor provides an energy density of no less than 50 Wh/k g based on the total electrode weight.
(Previously amended) The supercapacitor of claim 1 wherein said supercapacitor provides a specific capacitance from 100 to 250 F/g.
The supercapacitor of claim 1 wherein said ionic liquid is operated up to at least 3.5 volts.
The supercapacitor of claim 1 wherein said ionic liquid is operated up to at least 4.5 volts.
. canceled
The supercapacitor of claim 14 1 wherein said activated platelets or sheets are functionalized.
A supercapacitor comprising a first electrode, a second electrode, a porous separator disposed between the first and the second electrode, and an ionic liquid electrolyte in physical contact with the two electrodes, wherein at least one of the two electrodes comprises a mes o -porous structure being formed of a plurality of curved nano graphene platelets or sheets that prevent graphene re-stacking and that are packed to form said meso-porous structure containing multiple inter-layer pores between the graphene sheets having a pore size in the range of 2 nm and 25 nm which are accessible to said ionic liquid electrolyte, wherein said graphene platelets or sheets are not spacer-modified or surface-modified platelets or sheets and wherein said nano graphene platelets or sheets are either activated to form activated platelets or sheets or f u nctionalized with one or more functional groups selected from the group consisting of --SO -. --R'COX, -- R'(COOH). --CN, --R'CH 2X, --OH, --R'CHO, --R 'CN, wherein R' is a hydrocarbon radical, and wherein X is --NH 2, -- OH, or a halogen.
(Previously amended) The supercapacitor of claim 22, wherein both first and second electrodes comprise a meso-porous structure being formed of a plurality of curved nano graphene platelets or sheets that prevent graphene re-stacking and that are packed to form said meso-porous structure containing multiple inter-layer pores between the graphene sheets having a pore size in the range of 2 nm and 25 nm which are accessible to said ionic liquid electrolyte, wherein said graphene platelets or sheets are not spacer-modified or surface-modified platelets or sheets.
The supercapacitor of claim 22 wherein said ionic liquid is a room temperature ionic liquid.
The supercapacitor of claim 22 wherein a pore size of the multiple pores is at least three times greater than a molecular size of the ionic liquid.
(Previously amended) The supercapacitor of claim 22 wherein said nano graphene platelets or sheets comprise single-layer graphene or graphene oxide.
The supercapacitor of claim 22 wherein at least one of the electrodes further comprises a material selected from the group consisting of Ru O 2, IrO 2, NiO, Mn O 2, V OX, TiO 2, Cr₂ O 3, C 0 203, Pb O 2, A g20, MoC X, Mo₂N, WC X, WN X, a transition metal oxide, and combinations thereof.
(Previously amended) The supercapacitor of claim 22 wherein said at least one of the electrodes further comprises a conductive polymer that forms a redox pair with a nano graphene platelet or sheets.
The supercapacitor of claim 22 wherein said nano graphene platelets or sheets are activated to form activated graphene platelets or sheets. canceled
(Previously amended) The supercapacitor of claim 22 wherein said nano graphene platelets or sheets ar e functionalized.
80285208 (2008/0285208).
5169 (US 6,665,169).
Layer stacks claimed or described, ordered top of device to substrate.
supercapacitor with meso-porous nano graphene electrode
Materials described outside the worked examples.
curved nano graphene platelets or sheets
activated nano graphene platelets or sheets
ionic liquid electrolyte
Measurements and analyses referenced in the patent, with their drawing references.
FIG.1 (a) A scanning electron microscopic image of curved NGPs that are particularly amenable to forming desired meso-pores when these NGPs are packed together …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Energy Density | ≥ 50 Wh/kg | — |
Specific Capacitance | 100–250 F/g | — |
Specific Surface Area |
Related documents with shared materials, methods, properties, or citations.
MULTI-LAYERED GRAPHENE FILMS, ENERGY STORAGE DEVICES USING MULTI-LAYERED GRAPHENE FILMS AS ELECTRODES, AND METHODS OF MANUFACTURING MULTI-LAYERED GRAPHENE FILMS AND ENERGY STORAGE DEVICES
CRUMPLED GRAPHENE-ENCAPSULATED NANOSTRUCTURES AND LITHIUM ION BATTERY ANODES MADE THEREFROM
Patent
Atlas literature
Patent
US 9,053,870Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 (a) A scanning electron microscopic image of curved NGPs that are particularly amenable to forming desired meso-pores when these NGPs are packed together …
FIG.2 (a) Nitrogen adsorption isotherms, and (b) Pore size distribution of the meso-porous graphene material.
FIG.3 (a) Galvanostatic charge-discharge curve of a curved graphene electrode (6.6 mg each) at a constant current density of 1 A/g, using EMIMBF₄ ionic liquid …
FIG. 4. (a) Relationship between the energy density and current density of a curved graphene electrode in EM I MBF₄ ionic liquid electrolyte, (b) Ragone plot …
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 a first electrode, a second electrode, a porous separator disposed between the first and the second electrode, and an ionic liquid electrolyte in physical contact with the two electrodes, wherein at least one of the two electrodes comprises a meso-porous structure being formed of a plurality of curved nano graphene platelets or sheets that are packed to prevent graphene re-stacking and to form said meso-porous structure havingmultiple inter-layer pores between the graphene sheets having a pore size in the range of 2 n m and 25 n m, which are accessible to said ionic liquid electrolyte and wherein said nano graphene platelets or sheets are activated to form activated platelets or sheets.
The supercapacitor of claim 1 wherein said multiple pores have a pore size in the range of 3 n m and 25 rnm.
The supercapacitor of claim 1 wherein said multiple pores have a pore size in the range of 4 nm and 15 nm.
(Previously amended) The supercapacitor of claim 1 wherein both of the first electrode and the second electrode comprise a meso-porous structure being formed of a plurality of curved nano graphene platelets or sheets that are packed to prevent graphene re-stacking and to form said meso-porous structure havin g_ multiple inter-layer pores between the graphene sheets having a pore size in the range of 2 nm and 25 n m, which are accessible to said ionic liquid electrolyte.
The supercapacitor of claim 1 wherein said ionic liquid is a room temperature ionic liquid.
The supercapacitor of claim 1 wherein said ionic liquid has a molecular size smaller than a pore size of the multiple pores.
The supercapacitor of claim 1 wherein a pore size of the multiple pores is at least three times greater than a molecular size of the ionic liquid.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets comprise single-layer graphene.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets comprise an oxidized graphene or graphene oxide sheet.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets comprise a chemically or thermally reduced graphene oxide sheet.
The supercapacitor of claim 1 wherein said at least one of the electrodes further comprises a nano material selected from a carbon nano-tube, carbon nano-fiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber, or a combination thereof.
The supercapacitor of claim 1 wherein at least one of the electrodes further comprises a material selected from the group consisting of Ru O 2, IrO 2, NiO, Mn O 2, VO, TiO 2, Cr₂ O 3, C o20 3, Pb O 2, Ag₂ O, MoC X, Mo₂N, WC, WN X, a transition metal oxide, and combinations thereof.
(Previously amended) The supercapacitor of claim 1 wherein said at least one of the electrodes further comprises a conductive polymer that forms a redox pair with a nano graphene platelet or sheet.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets are functionalized.
(Previously amended) The supercapacitor of claim 1 wherein said nano graphene platelets or sheets are functionalized with one or more functional groups selected from the group consisting of --S O 3, --R'COX, --R'(C OO H)2, --CN, --R'CH₂X, --OH, --R'CHO, --R'CN, wherein R' is a hydrocarbon radical, and wherein X is --NH2,-- OH, or a halogen.
(Previously amended) The supercapacitor of claim 1 wherein said supercapacitor provides an energy density of no less than 50 Wh/k g based on the total electrode weight.
(Previously amended) The supercapacitor of claim 1 wherein said supercapacitor provides a specific capacitance from 100 to 250 F/g.
The supercapacitor of claim 1 wherein said ionic liquid is operated up to at least 3.5 volts.
The supercapacitor of claim 1 wherein said ionic liquid is operated up to at least 4.5 volts.
. canceled
The supercapacitor of claim 14 1 wherein said activated platelets or sheets are functionalized.
A supercapacitor comprising a first electrode, a second electrode, a porous separator disposed between the first and the second electrode, and an ionic liquid electrolyte in physical contact with the two electrodes, wherein at least one of the two electrodes comprises a mes o -porous structure being formed of a plurality of curved nano graphene platelets or sheets that prevent graphene re-stacking and that are packed to form said meso-porous structure containing multiple inter-layer pores between the graphene sheets having a pore size in the range of 2 nm and 25 nm which are accessible to said ionic liquid electrolyte, wherein said graphene platelets or sheets are not spacer-modified or surface-modified platelets or sheets and wherein said nano graphene platelets or sheets are either activated to form activated platelets or sheets or f u nctionalized with one or more functional groups selected from the group consisting of --SO -. --R'COX, -- R'(COOH). --CN, --R'CH 2X, --OH, --R'CHO, --R 'CN, wherein R' is a hydrocarbon radical, and wherein X is --NH 2, -- OH, or a halogen.
(Previously amended) The supercapacitor of claim 22, wherein both first and second electrodes comprise a meso-porous structure being formed of a plurality of curved nano graphene platelets or sheets that prevent graphene re-stacking and that are packed to form said meso-porous structure containing multiple inter-layer pores between the graphene sheets having a pore size in the range of 2 nm and 25 nm which are accessible to said ionic liquid electrolyte, wherein said graphene platelets or sheets are not spacer-modified or surface-modified platelets or sheets.
The supercapacitor of claim 22 wherein said ionic liquid is a room temperature ionic liquid.
The supercapacitor of claim 22 wherein a pore size of the multiple pores is at least three times greater than a molecular size of the ionic liquid.
(Previously amended) The supercapacitor of claim 22 wherein said nano graphene platelets or sheets comprise single-layer graphene or graphene oxide.
The supercapacitor of claim 22 wherein at least one of the electrodes further comprises a material selected from the group consisting of Ru O 2, IrO 2, NiO, Mn O 2, V OX, TiO 2, Cr₂ O 3, C 0 203, Pb O 2, A g20, MoC X, Mo₂N, WC X, WN X, a transition metal oxide, and combinations thereof.
(Previously amended) The supercapacitor of claim 22 wherein said at least one of the electrodes further comprises a conductive polymer that forms a redox pair with a nano graphene platelet or sheets.
The supercapacitor of claim 22 wherein said nano graphene platelets or sheets are activated to form activated graphene platelets or sheets. canceled
(Previously amended) The supercapacitor of claim 22 wherein said nano graphene platelets or sheets ar e functionalized.
80285208 (2008/0285208).
5169 (US 6,665,169).
Layer stacks claimed or described, ordered top of device to substrate.
supercapacitor with meso-porous nano graphene electrode
Materials described outside the worked examples.
curved nano graphene platelets or sheets
activated nano graphene platelets or sheets
ionic liquid electrolyte
Measurements and analyses referenced in the patent, with their drawing references.
FIG.1 (a) A scanning electron microscopic image of curved NGPs that are particularly amenable to forming desired meso-pores when these NGPs are packed together …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Energy Density | ≥ 50 Wh/kg | — |
Specific Capacitance | 100–250 F/g | — |
Specific Surface Area |
Related documents with shared materials, methods, properties, or citations.
MULTI-LAYERED GRAPHENE FILMS, ENERGY STORAGE DEVICES USING MULTI-LAYERED GRAPHENE FILMS AS ELECTRODES, AND METHODS OF MANUFACTURING MULTI-LAYERED GRAPHENE FILMS AND ENERGY STORAGE DEVICES
CRUMPLED GRAPHENE-ENCAPSULATED NANOSTRUCTURES AND LITHIUM ION BATTERY ANODES MADE THEREFROM
single-layer graphene
graphene oxide
chemically or thermally reduced graphene oxide
carbon nano-tube, carbon nano-fiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber
transition metal oxide or carbide/nitride electrode additive
conductive polymer
nano graphene platelets (NGPs)
pristine graphene
FIG.1 (a) A scanning electron microscopic image of curved NGPs that are particularly amenable to forming desired meso-pores when these NGPs are packed together …
FIG.3 (a) Galvanostatic charge-discharge curve of a curved graphene electrode (6.6 mg each) at a constant current density of 1 A/g, using EMIMBF₄ ionic liquid …
FIG. 4. (a) Relationship between the energy density and current density of a curved graphene electrode in EM I MBF₄ ionic liquid electrolyte, (b) Ragone plot …
| 2675 m2/g |
single-layer graphene |
Duration | 15–60 seconds | — |
Thickness | 2–25 nm | — |
Thickness | 4–15 nm | — |
Thickness | ≤ 1 nm | — |
Duration | ≤ 2 minutes | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 10 nm | — |
Thickness | ≥ 2 nm | — |
Thickness | ≥ 0.4 nm | — |
Thickness | 3–25 nm | — |
— | ≥ 1 W | — |
single-layer graphene
graphene oxide
chemically or thermally reduced graphene oxide
carbon nano-tube, carbon nano-fiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber
transition metal oxide or carbide/nitride electrode additive
conductive polymer
nano graphene platelets (NGPs)
pristine graphene
FIG.1 (a) A scanning electron microscopic image of curved NGPs that are particularly amenable to forming desired meso-pores when these NGPs are packed together …
FIG.3 (a) Galvanostatic charge-discharge curve of a curved graphene electrode (6.6 mg each) at a constant current density of 1 A/g, using EMIMBF₄ ionic liquid …
FIG. 4. (a) Relationship between the energy density and current density of a curved graphene electrode in EM I MBF₄ ionic liquid electrolyte, (b) Ragone plot …
| 2675 m2/g |
single-layer graphene |
Duration | 15–60 seconds | — |
Thickness | 2–25 nm | — |
Thickness | 4–15 nm | — |
Thickness | ≤ 1 nm | — |
Duration | ≤ 2 minutes | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 10 nm | — |
Thickness | ≥ 2 nm | — |
Thickness | ≥ 0.4 nm | — |
Thickness | 3–25 nm | — |
— | ≥ 1 W | — |
single-layer graphene
graphene oxide
chemically or thermally reduced graphene oxide
carbon nano-tube, carbon nano-fiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber
transition metal oxide or carbide/nitride electrode additive
conductive polymer
nano graphene platelets (NGPs)
pristine graphene
FIG.1 (a) A scanning electron microscopic image of curved NGPs that are particularly amenable to forming desired meso-pores when these NGPs are packed together …
FIG.3 (a) Galvanostatic charge-discharge curve of a curved graphene electrode (6.6 mg each) at a constant current density of 1 A/g, using EMIMBF₄ ionic liquid …
FIG. 4. (a) Relationship between the energy density and current density of a curved graphene electrode in EM I MBF₄ ionic liquid electrolyte, (b) Ragone plot …
| 2675 m2/g |
single-layer graphene |
Duration | 15–60 seconds | — |
Thickness | 2–25 nm | — |
Thickness | 4–15 nm | — |
Thickness | ≤ 1 nm | — |
Duration | ≤ 2 minutes | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 10 nm | — |
Thickness | ≥ 2 nm | — |
Thickness | ≥ 0.4 nm | — |
Thickness | 3–25 nm | — |
— | ≥ 1 W | — |
single-layer graphene
graphene oxide
chemically or thermally reduced graphene oxide
carbon nano-tube, carbon nano-fiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber
transition metal oxide or carbide/nitride electrode additive
conductive polymer
nano graphene platelets (NGPs)
pristine graphene
FIG.1 (a) A scanning electron microscopic image of curved NGPs that are particularly amenable to forming desired meso-pores when these NGPs are packed together …
FIG.3 (a) Galvanostatic charge-discharge curve of a curved graphene electrode (6.6 mg each) at a constant current density of 1 A/g, using EMIMBF₄ ionic liquid …
FIG. 4. (a) Relationship between the energy density and current density of a curved graphene electrode in EM I MBF₄ ionic liquid electrolyte, (b) Ragone plot …
| 2675 m2/g |
single-layer graphene |
Duration | 15–60 seconds | — |
Thickness | 2–25 nm | — |
Thickness | 4–15 nm | — |
Thickness | ≤ 1 nm | — |
Duration | ≤ 2 minutes | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 10 nm | — |
Thickness | ≥ 2 nm | — |
Thickness | ≥ 0.4 nm | — |
Thickness | 3–25 nm | — |
— | ≥ 1 W | — |