Patent
US 9,190,667GRAPHENE NANOCOMPOSITES FOR ELECTROCHEMICAL CELL ELECTRODES
Aruna Zhamu, Bor Z. Jang, Jinjun Shi
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 9,190,667Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 (A) Schematic of a prior art meso-porous NGP nanocomposite [Ref. 40], comprising NGPs bonded by a binder material; and (B) Schematic of a nanocomposite …
FIG.2 Schematic of a cylinder-shape lithium ion battery.
FIG.3 X-ray diffraction peaks of natural graphite particles after intercalation/oxidation treatments for three different lengths of time. The sample with the …
FIG.4 The lateral dimensions (average length and width) of NGPs appear to dictate the diameters of the NGP-matrix nanocomposite solid particles after …
FIG.5 (A) Reversible and irreversible capacities of the presently invented nanocomposite-based electrodes are plotted versus the carbon matrix weight fraction; …
FIG.6 The specific capacitance of supercapacitor electrodes based on NGP nanocomposite solid particles after different treatments: carbonization, activation, …
FIG.7 The specific surface areas of NGPs alone, and several NGP-containing composites: Sample 7-A (carbonized nanocomposite particles), Sample 7- B (carbonized …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated graphene platelets having a thickness less than 100 n m bonded by a first binder material, wherein said exfoliated graphene platelets occupy a weight fraction of 2% to 98% of the total nanocomposite particle weight and said graphene platelets are not obtained from direct graphitization of said first binder material, wherein said solid nanocomposite particle has a substantially spherical or ellipsoidal shape, wherein said exfoliated graphene platelets are obtained from exfoliation and platelet separation of a member of the group consisting of a natural graphite, synthetic graphite, highly oriented pyrolytic graphite, graphite fiber, carbon fiber, carbon nano-fiber, graphitic nano-fiber, spherical graphite or graphite globule, meso- phase micro-bead, meso-phase pitch, graphitic coke, and graphitized polymeric carbon; and wherein said first binder material is selected from a polymer, polymeric carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, or a combination thereof and further wherein said solid particle comprises therein microscopic or meso-scaled pores.
The solid nanocomposite particle of claim 1, wherein said particle comprises pores sufficient in sizes to enable transport of ions in a secondary battery or electrolyte in a supercapacitor.
The solid nanocomposite particle of claim 1, wherein said first binder material comprises a carbon material obtained by pyrolyzing or heating a polymer, organic material, coal tar pitch, petroleum pitch, meso-phase pitch, or a combination thereof.
The solid nanocomposite particle of claim 1, wherein said individual and exfoliated nano-scaled graphene platelets have a thickness less than 100 nm and a length, width, or diameter less than pm.
The solid nanocomposite particle of claim 1, wherein said individual and exfoliated nano-scaled graphene platelets have a thickness less than 2 nm, or a length, width, or diameter less than 5 pm.
An electrochemical cell comprising an electrode that comprises a solid nanocomposite particle as defined in claim 1.
A lithium secondary battery comprising an anode, a cathode, a separator disposed between said anode and said cathode, and an electrolyte in contact with said anode and said cathode, wherein said anode comprises a solid nanocomposite particle of claim 1 as an anode active material.
A supercapacitor comprising two electrodes, a separator disposed between said two electrodes, and an electrolyte in ionic contact with the two electrodes, wherein at least one of the two electrodes comprises a solid nanocomposite particle of claim 1 as an electrode active material.
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated graphene platelets bonded by a first binder material, wherein said graphene platelets occupy a weight fraction of 2% to 98% of the total nanocomposite particle weight and said graphene platelets are not obtained from direct graphitization of said first binder material, and wherein said first binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, and combinations thereof and wherein said solid particle has a substantially spherical or ellipsoidal shape and further wherein said solid particle comprises therein microscopic or meso-scaled pores.
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated 2 Application No. 12/220,651 Amendment Accompanying RCE graphene platelets bonded by a first binder material, wherein said graphene platelets occupy a weight fraction of 2% to 98% of the total nanocomposite particle weight and said graphene platelets are not obtained from direct graphitization of said first binder material, wherein said solid nanocomposite particle has a substantially spherical or ellipsoidal shape, and wherein said first binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, and combinations thereof and further wherein said solid particle comprises therein microscopic or meso-scaled pores, 1 nm to 10 nm in size.
canceled
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An electrochemical cell electrode comprising solid nanocomposite particles, wherein (a) a solid nanocomposite particle consists of individual exfoliated graphene platelets bonded by a first binder material, wherein said graphene platelets occupy a proportion of no less than 2 % by weight of the solid nanocomposite particle weight and said graphene platelets are not obtained from graphitization of said first binder material and wherein said solid nanocomposite particle comprises therein microscopic or 3 Application No. 12/220,651 Amendment Accompanying RCE meso-scaled pores, 1 n m to 10 nm in size, wherein said solid nanocomposite particle has a substantially spherical or ellipsoidal shape; (b) said graphene platelets having a length or width in the range of 10 n m to 10 pm; (c) said solid nanocomposite particles being bonded by a second binder material; and (d) said first or both said first and said second binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, or a combination thereof.
The electrode of claim 10, wherein said solid nanocomposite particles comprise therein microscopic or meso-scaled pores.
The electrode of claim 10, wherein said solid nanocomposite particles comprise pores sufficient in sizes to enable transport of ions in a secondary battery > r electrolyte in a supercapacitor.
The electrode of claim 10, wherein said first binder material comprises a carbon material obtained by pyrolyzing or heating a polymer, organic material, coal tar pitch, petroleum pitch, meso-phase pitch, or a combination thereof.
The electrode of claim 10, wherein said individual and exfoliated iano-scaled graphene platelets have a thickness less than 10 nm and/or a length, width, or diameter less than 5 pm.
The electrode of claim 10, wherein said individual and exfoliated i ano-scaled graphene platelets have a thickness less than 1 nm and/or a length, width, or diameter less than 2 pm.
The electrode of claim 10, wherein said multiple solid nanocomposite particles, when measured with or without a second binder, exhibit a specific surface area no less than 500 m 2/gm. 4 Application No. 12/220,651 Amendment Accompanying RCE
The electrode of claim 10, wherein said multiple solid nanocomposite particles, when measured with or without a second binder, exhibit a specific surface area no less than 1,000 m2/gm.
The electrode of claim 10, wherein said multiple solid nanocomposite particles, when measured with or without a second binder, exhibit a specific surface area no less than 1,500 m 2/gm.
A supercapacitor comprising two electrodes, a separator disposed between said two electrodes, and an electrolyte in ionic contact with the two electrodes, wherein at least one of the two electrodes comprises said electrode of claim 10.
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The lithium secondary battery as defined in claim 24, wherein said anode provides a specific capacity of no less than 350 mAh/g.
Layer stacks claimed or described, ordered top of device to substrate.
solid nanocomposite particle for electrochemical cell electrode
electrochemical cell electrode comprising solid nanocomposite particles
electrochemical cell
No layer stack recorded.
lithium secondary battery
Materials described outside the worked examples.
exfoliated graphene platelets
first binder material
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
specific surface area of electrode (claimed lower bound) | ≥ 500 | exfoliated graphene platelets |
specific surface area of electrode (claimed lower bound) | ≥ 1000 |
Patent
Atlas literature
Patent
US 9,190,667Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 (A) Schematic of a prior art meso-porous NGP nanocomposite [Ref. 40], comprising NGPs bonded by a binder material; and (B) Schematic of a nanocomposite …
FIG.2 Schematic of a cylinder-shape lithium ion battery.
FIG.3 X-ray diffraction peaks of natural graphite particles after intercalation/oxidation treatments for three different lengths of time. The sample with the …
FIG.4 The lateral dimensions (average length and width) of NGPs appear to dictate the diameters of the NGP-matrix nanocomposite solid particles after …
FIG.5 (A) Reversible and irreversible capacities of the presently invented nanocomposite-based electrodes are plotted versus the carbon matrix weight fraction; …
FIG.6 The specific capacitance of supercapacitor electrodes based on NGP nanocomposite solid particles after different treatments: carbonization, activation, …
FIG.7 The specific surface areas of NGPs alone, and several NGP-containing composites: Sample 7-A (carbonized nanocomposite particles), Sample 7- B (carbonized …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated graphene platelets having a thickness less than 100 n m bonded by a first binder material, wherein said exfoliated graphene platelets occupy a weight fraction of 2% to 98% of the total nanocomposite particle weight and said graphene platelets are not obtained from direct graphitization of said first binder material, wherein said solid nanocomposite particle has a substantially spherical or ellipsoidal shape, wherein said exfoliated graphene platelets are obtained from exfoliation and platelet separation of a member of the group consisting of a natural graphite, synthetic graphite, highly oriented pyrolytic graphite, graphite fiber, carbon fiber, carbon nano-fiber, graphitic nano-fiber, spherical graphite or graphite globule, meso- phase micro-bead, meso-phase pitch, graphitic coke, and graphitized polymeric carbon; and wherein said first binder material is selected from a polymer, polymeric carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, or a combination thereof and further wherein said solid particle comprises therein microscopic or meso-scaled pores.
The solid nanocomposite particle of claim 1, wherein said particle comprises pores sufficient in sizes to enable transport of ions in a secondary battery or electrolyte in a supercapacitor.
The solid nanocomposite particle of claim 1, wherein said first binder material comprises a carbon material obtained by pyrolyzing or heating a polymer, organic material, coal tar pitch, petroleum pitch, meso-phase pitch, or a combination thereof.
The solid nanocomposite particle of claim 1, wherein said individual and exfoliated nano-scaled graphene platelets have a thickness less than 100 nm and a length, width, or diameter less than pm.
The solid nanocomposite particle of claim 1, wherein said individual and exfoliated nano-scaled graphene platelets have a thickness less than 2 nm, or a length, width, or diameter less than 5 pm.
An electrochemical cell comprising an electrode that comprises a solid nanocomposite particle as defined in claim 1.
A lithium secondary battery comprising an anode, a cathode, a separator disposed between said anode and said cathode, and an electrolyte in contact with said anode and said cathode, wherein said anode comprises a solid nanocomposite particle of claim 1 as an anode active material.
A supercapacitor comprising two electrodes, a separator disposed between said two electrodes, and an electrolyte in ionic contact with the two electrodes, wherein at least one of the two electrodes comprises a solid nanocomposite particle of claim 1 as an electrode active material.
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated graphene platelets bonded by a first binder material, wherein said graphene platelets occupy a weight fraction of 2% to 98% of the total nanocomposite particle weight and said graphene platelets are not obtained from direct graphitization of said first binder material, and wherein said first binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, and combinations thereof and wherein said solid particle has a substantially spherical or ellipsoidal shape and further wherein said solid particle comprises therein microscopic or meso-scaled pores.
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated 2 Application No. 12/220,651 Amendment Accompanying RCE graphene platelets bonded by a first binder material, wherein said graphene platelets occupy a weight fraction of 2% to 98% of the total nanocomposite particle weight and said graphene platelets are not obtained from direct graphitization of said first binder material, wherein said solid nanocomposite particle has a substantially spherical or ellipsoidal shape, and wherein said first binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, and combinations thereof and further wherein said solid particle comprises therein microscopic or meso-scaled pores, 1 nm to 10 nm in size.
canceled
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An electrochemical cell electrode comprising solid nanocomposite particles, wherein (a) a solid nanocomposite particle consists of individual exfoliated graphene platelets bonded by a first binder material, wherein said graphene platelets occupy a proportion of no less than 2 % by weight of the solid nanocomposite particle weight and said graphene platelets are not obtained from graphitization of said first binder material and wherein said solid nanocomposite particle comprises therein microscopic or 3 Application No. 12/220,651 Amendment Accompanying RCE meso-scaled pores, 1 n m to 10 nm in size, wherein said solid nanocomposite particle has a substantially spherical or ellipsoidal shape; (b) said graphene platelets having a length or width in the range of 10 n m to 10 pm; (c) said solid nanocomposite particles being bonded by a second binder material; and (d) said first or both said first and said second binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, or a combination thereof.
The electrode of claim 10, wherein said solid nanocomposite particles comprise therein microscopic or meso-scaled pores.
The electrode of claim 10, wherein said solid nanocomposite particles comprise pores sufficient in sizes to enable transport of ions in a secondary battery > r electrolyte in a supercapacitor.
The electrode of claim 10, wherein said first binder material comprises a carbon material obtained by pyrolyzing or heating a polymer, organic material, coal tar pitch, petroleum pitch, meso-phase pitch, or a combination thereof.
The electrode of claim 10, wherein said individual and exfoliated iano-scaled graphene platelets have a thickness less than 10 nm and/or a length, width, or diameter less than 5 pm.
The electrode of claim 10, wherein said individual and exfoliated i ano-scaled graphene platelets have a thickness less than 1 nm and/or a length, width, or diameter less than 2 pm.
The electrode of claim 10, wherein said multiple solid nanocomposite particles, when measured with or without a second binder, exhibit a specific surface area no less than 500 m 2/gm. 4 Application No. 12/220,651 Amendment Accompanying RCE
The electrode of claim 10, wherein said multiple solid nanocomposite particles, when measured with or without a second binder, exhibit a specific surface area no less than 1,000 m2/gm.
The electrode of claim 10, wherein said multiple solid nanocomposite particles, when measured with or without a second binder, exhibit a specific surface area no less than 1,500 m 2/gm.
A supercapacitor comprising two electrodes, a separator disposed between said two electrodes, and an electrolyte in ionic contact with the two electrodes, wherein at least one of the two electrodes comprises said electrode of claim 10.
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The lithium secondary battery as defined in claim 24, wherein said anode provides a specific capacity of no less than 350 mAh/g.
Layer stacks claimed or described, ordered top of device to substrate.
solid nanocomposite particle for electrochemical cell electrode
electrochemical cell electrode comprising solid nanocomposite particles
electrochemical cell
No layer stack recorded.
lithium secondary battery
Materials described outside the worked examples.
exfoliated graphene platelets
first binder material
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
specific surface area of electrode (claimed lower bound) | ≥ 500 | exfoliated graphene platelets |
specific surface area of electrode (claimed lower bound) | ≥ 1000 |
Patent
Atlas literature
Patent
US 9,190,667Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 (A) Schematic of a prior art meso-porous NGP nanocomposite [Ref. 40], comprising NGPs bonded by a binder material; and (B) Schematic of a nanocomposite …
FIG.2 Schematic of a cylinder-shape lithium ion battery.
FIG.3 X-ray diffraction peaks of natural graphite particles after intercalation/oxidation treatments for three different lengths of time. The sample with the …
FIG.4 The lateral dimensions (average length and width) of NGPs appear to dictate the diameters of the NGP-matrix nanocomposite solid particles after …
FIG.5 (A) Reversible and irreversible capacities of the presently invented nanocomposite-based electrodes are plotted versus the carbon matrix weight fraction; …
FIG.6 The specific capacitance of supercapacitor electrodes based on NGP nanocomposite solid particles after different treatments: carbonization, activation, …
FIG.7 The specific surface areas of NGPs alone, and several NGP-containing composites: Sample 7-A (carbonized nanocomposite particles), Sample 7- B (carbonized …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated graphene platelets having a thickness less than 100 n m bonded by a first binder material, wherein said exfoliated graphene platelets occupy a weight fraction of 2% to 98% of the total nanocomposite particle weight and said graphene platelets are not obtained from direct graphitization of said first binder material, wherein said solid nanocomposite particle has a substantially spherical or ellipsoidal shape, wherein said exfoliated graphene platelets are obtained from exfoliation and platelet separation of a member of the group consisting of a natural graphite, synthetic graphite, highly oriented pyrolytic graphite, graphite fiber, carbon fiber, carbon nano-fiber, graphitic nano-fiber, spherical graphite or graphite globule, meso- phase micro-bead, meso-phase pitch, graphitic coke, and graphitized polymeric carbon; and wherein said first binder material is selected from a polymer, polymeric carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, or a combination thereof and further wherein said solid particle comprises therein microscopic or meso-scaled pores.
The solid nanocomposite particle of claim 1, wherein said particle comprises pores sufficient in sizes to enable transport of ions in a secondary battery or electrolyte in a supercapacitor.
The solid nanocomposite particle of claim 1, wherein said first binder material comprises a carbon material obtained by pyrolyzing or heating a polymer, organic material, coal tar pitch, petroleum pitch, meso-phase pitch, or a combination thereof.
The solid nanocomposite particle of claim 1, wherein said individual and exfoliated nano-scaled graphene platelets have a thickness less than 100 nm and a length, width, or diameter less than pm.
The solid nanocomposite particle of claim 1, wherein said individual and exfoliated nano-scaled graphene platelets have a thickness less than 2 nm, or a length, width, or diameter less than 5 pm.
An electrochemical cell comprising an electrode that comprises a solid nanocomposite particle as defined in claim 1.
A lithium secondary battery comprising an anode, a cathode, a separator disposed between said anode and said cathode, and an electrolyte in contact with said anode and said cathode, wherein said anode comprises a solid nanocomposite particle of claim 1 as an anode active material.
A supercapacitor comprising two electrodes, a separator disposed between said two electrodes, and an electrolyte in ionic contact with the two electrodes, wherein at least one of the two electrodes comprises a solid nanocomposite particle of claim 1 as an electrode active material.
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated graphene platelets bonded by a first binder material, wherein said graphene platelets occupy a weight fraction of 2% to 98% of the total nanocomposite particle weight and said graphene platelets are not obtained from direct graphitization of said first binder material, and wherein said first binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, and combinations thereof and wherein said solid particle has a substantially spherical or ellipsoidal shape and further wherein said solid particle comprises therein microscopic or meso-scaled pores.
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated 2 Application No. 12/220,651 Amendment Accompanying RCE graphene platelets bonded by a first binder material, wherein said graphene platelets occupy a weight fraction of 2% to 98% of the total nanocomposite particle weight and said graphene platelets are not obtained from direct graphitization of said first binder material, wherein said solid nanocomposite particle has a substantially spherical or ellipsoidal shape, and wherein said first binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, and combinations thereof and further wherein said solid particle comprises therein microscopic or meso-scaled pores, 1 nm to 10 nm in size.
canceled
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An electrochemical cell electrode comprising solid nanocomposite particles, wherein (a) a solid nanocomposite particle consists of individual exfoliated graphene platelets bonded by a first binder material, wherein said graphene platelets occupy a proportion of no less than 2 % by weight of the solid nanocomposite particle weight and said graphene platelets are not obtained from graphitization of said first binder material and wherein said solid nanocomposite particle comprises therein microscopic or 3 Application No. 12/220,651 Amendment Accompanying RCE meso-scaled pores, 1 n m to 10 nm in size, wherein said solid nanocomposite particle has a substantially spherical or ellipsoidal shape; (b) said graphene platelets having a length or width in the range of 10 n m to 10 pm; (c) said solid nanocomposite particles being bonded by a second binder material; and (d) said first or both said first and said second binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, or a combination thereof.
The electrode of claim 10, wherein said solid nanocomposite particles comprise therein microscopic or meso-scaled pores.
The electrode of claim 10, wherein said solid nanocomposite particles comprise pores sufficient in sizes to enable transport of ions in a secondary battery > r electrolyte in a supercapacitor.
The electrode of claim 10, wherein said first binder material comprises a carbon material obtained by pyrolyzing or heating a polymer, organic material, coal tar pitch, petroleum pitch, meso-phase pitch, or a combination thereof.
The electrode of claim 10, wherein said individual and exfoliated iano-scaled graphene platelets have a thickness less than 10 nm and/or a length, width, or diameter less than 5 pm.
The electrode of claim 10, wherein said individual and exfoliated i ano-scaled graphene platelets have a thickness less than 1 nm and/or a length, width, or diameter less than 2 pm.
The electrode of claim 10, wherein said multiple solid nanocomposite particles, when measured with or without a second binder, exhibit a specific surface area no less than 500 m 2/gm. 4 Application No. 12/220,651 Amendment Accompanying RCE
The electrode of claim 10, wherein said multiple solid nanocomposite particles, when measured with or without a second binder, exhibit a specific surface area no less than 1,000 m2/gm.
The electrode of claim 10, wherein said multiple solid nanocomposite particles, when measured with or without a second binder, exhibit a specific surface area no less than 1,500 m 2/gm.
A supercapacitor comprising two electrodes, a separator disposed between said two electrodes, and an electrolyte in ionic contact with the two electrodes, wherein at least one of the two electrodes comprises said electrode of claim 10.
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The lithium secondary battery as defined in claim 24, wherein said anode provides a specific capacity of no less than 350 mAh/g.
Layer stacks claimed or described, ordered top of device to substrate.
solid nanocomposite particle for electrochemical cell electrode
electrochemical cell electrode comprising solid nanocomposite particles
electrochemical cell
No layer stack recorded.
lithium secondary battery
Materials described outside the worked examples.
exfoliated graphene platelets
first binder material
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
specific surface area of electrode (claimed lower bound) | ≥ 500 | exfoliated graphene platelets |
specific surface area of electrode (claimed lower bound) | ≥ 1000 |
Patent
Atlas literature
Patent
US 9,190,667Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 (A) Schematic of a prior art meso-porous NGP nanocomposite [Ref. 40], comprising NGPs bonded by a binder material; and (B) Schematic of a nanocomposite …
FIG.2 Schematic of a cylinder-shape lithium ion battery.
FIG.3 X-ray diffraction peaks of natural graphite particles after intercalation/oxidation treatments for three different lengths of time. The sample with the …
FIG.4 The lateral dimensions (average length and width) of NGPs appear to dictate the diameters of the NGP-matrix nanocomposite solid particles after …
FIG.5 (A) Reversible and irreversible capacities of the presently invented nanocomposite-based electrodes are plotted versus the carbon matrix weight fraction; …
FIG.6 The specific capacitance of supercapacitor electrodes based on NGP nanocomposite solid particles after different treatments: carbonization, activation, …
FIG.7 The specific surface areas of NGPs alone, and several NGP-containing composites: Sample 7-A (carbonized nanocomposite particles), Sample 7- B (carbonized …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated graphene platelets having a thickness less than 100 n m bonded by a first binder material, wherein said exfoliated graphene platelets occupy a weight fraction of 2% to 98% of the total nanocomposite particle weight and said graphene platelets are not obtained from direct graphitization of said first binder material, wherein said solid nanocomposite particle has a substantially spherical or ellipsoidal shape, wherein said exfoliated graphene platelets are obtained from exfoliation and platelet separation of a member of the group consisting of a natural graphite, synthetic graphite, highly oriented pyrolytic graphite, graphite fiber, carbon fiber, carbon nano-fiber, graphitic nano-fiber, spherical graphite or graphite globule, meso- phase micro-bead, meso-phase pitch, graphitic coke, and graphitized polymeric carbon; and wherein said first binder material is selected from a polymer, polymeric carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, or a combination thereof and further wherein said solid particle comprises therein microscopic or meso-scaled pores.
The solid nanocomposite particle of claim 1, wherein said particle comprises pores sufficient in sizes to enable transport of ions in a secondary battery or electrolyte in a supercapacitor.
The solid nanocomposite particle of claim 1, wherein said first binder material comprises a carbon material obtained by pyrolyzing or heating a polymer, organic material, coal tar pitch, petroleum pitch, meso-phase pitch, or a combination thereof.
The solid nanocomposite particle of claim 1, wherein said individual and exfoliated nano-scaled graphene platelets have a thickness less than 100 nm and a length, width, or diameter less than pm.
The solid nanocomposite particle of claim 1, wherein said individual and exfoliated nano-scaled graphene platelets have a thickness less than 2 nm, or a length, width, or diameter less than 5 pm.
An electrochemical cell comprising an electrode that comprises a solid nanocomposite particle as defined in claim 1.
A lithium secondary battery comprising an anode, a cathode, a separator disposed between said anode and said cathode, and an electrolyte in contact with said anode and said cathode, wherein said anode comprises a solid nanocomposite particle of claim 1 as an anode active material.
A supercapacitor comprising two electrodes, a separator disposed between said two electrodes, and an electrolyte in ionic contact with the two electrodes, wherein at least one of the two electrodes comprises a solid nanocomposite particle of claim 1 as an electrode active material.
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated graphene platelets bonded by a first binder material, wherein said graphene platelets occupy a weight fraction of 2% to 98% of the total nanocomposite particle weight and said graphene platelets are not obtained from direct graphitization of said first binder material, and wherein said first binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, and combinations thereof and wherein said solid particle has a substantially spherical or ellipsoidal shape and further wherein said solid particle comprises therein microscopic or meso-scaled pores.
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated 2 Application No. 12/220,651 Amendment Accompanying RCE graphene platelets bonded by a first binder material, wherein said graphene platelets occupy a weight fraction of 2% to 98% of the total nanocomposite particle weight and said graphene platelets are not obtained from direct graphitization of said first binder material, wherein said solid nanocomposite particle has a substantially spherical or ellipsoidal shape, and wherein said first binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, and combinations thereof and further wherein said solid particle comprises therein microscopic or meso-scaled pores, 1 nm to 10 nm in size.
canceled
canceled
An electrochemical cell electrode comprising solid nanocomposite particles, wherein (a) a solid nanocomposite particle consists of individual exfoliated graphene platelets bonded by a first binder material, wherein said graphene platelets occupy a proportion of no less than 2 % by weight of the solid nanocomposite particle weight and said graphene platelets are not obtained from graphitization of said first binder material and wherein said solid nanocomposite particle comprises therein microscopic or 3 Application No. 12/220,651 Amendment Accompanying RCE meso-scaled pores, 1 n m to 10 nm in size, wherein said solid nanocomposite particle has a substantially spherical or ellipsoidal shape; (b) said graphene platelets having a length or width in the range of 10 n m to 10 pm; (c) said solid nanocomposite particles being bonded by a second binder material; and (d) said first or both said first and said second binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, or a combination thereof.
The electrode of claim 10, wherein said solid nanocomposite particles comprise therein microscopic or meso-scaled pores.
The electrode of claim 10, wherein said solid nanocomposite particles comprise pores sufficient in sizes to enable transport of ions in a secondary battery > r electrolyte in a supercapacitor.
The electrode of claim 10, wherein said first binder material comprises a carbon material obtained by pyrolyzing or heating a polymer, organic material, coal tar pitch, petroleum pitch, meso-phase pitch, or a combination thereof.
The electrode of claim 10, wherein said individual and exfoliated iano-scaled graphene platelets have a thickness less than 10 nm and/or a length, width, or diameter less than 5 pm.
The electrode of claim 10, wherein said individual and exfoliated i ano-scaled graphene platelets have a thickness less than 1 nm and/or a length, width, or diameter less than 2 pm.
The electrode of claim 10, wherein said multiple solid nanocomposite particles, when measured with or without a second binder, exhibit a specific surface area no less than 500 m 2/gm. 4 Application No. 12/220,651 Amendment Accompanying RCE
The electrode of claim 10, wherein said multiple solid nanocomposite particles, when measured with or without a second binder, exhibit a specific surface area no less than 1,000 m2/gm.
The electrode of claim 10, wherein said multiple solid nanocomposite particles, when measured with or without a second binder, exhibit a specific surface area no less than 1,500 m 2/gm.
A supercapacitor comprising two electrodes, a separator disposed between said two electrodes, and an electrolyte in ionic contact with the two electrodes, wherein at least one of the two electrodes comprises said electrode of claim 10.
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canceled
. canceled
. canceled
The lithium secondary battery as defined in claim 24, wherein said anode provides a specific capacity of no less than 350 mAh/g.
Layer stacks claimed or described, ordered top of device to substrate.
solid nanocomposite particle for electrochemical cell electrode
electrochemical cell electrode comprising solid nanocomposite particles
electrochemical cell
No layer stack recorded.
lithium secondary battery
Materials described outside the worked examples.
exfoliated graphene platelets
first binder material
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
specific surface area of electrode (claimed lower bound) | ≥ 500 | exfoliated graphene platelets |
specific surface area of electrode (claimed lower bound) | ≥ 1000 |
supercapacitor
pyrolyzed carbon binder
specific surface area of electrode (claimed lower bound) | ≥ 1500 | exfoliated graphene platelets |
anode specific capacity (claimed lower bound) | ≥ 350 | exfoliated graphene platelets |
supercapacitor specific capacitance (claimed lower bound) | ≥ 100 | exfoliated graphene platelets |
Duration | 30–120 s | — |
Thickness | 1–10 nm | — |
Duration | 1–24 hours | — |
Temperature | 85–100 °C | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 2 nm | — |
Thickness | ≥ 1 nm | — |
Thickness | ≤ 10 nm | — |
supercapacitor
pyrolyzed carbon binder
specific surface area of electrode (claimed lower bound) | ≥ 1500 | exfoliated graphene platelets |
anode specific capacity (claimed lower bound) | ≥ 350 | exfoliated graphene platelets |
supercapacitor specific capacitance (claimed lower bound) | ≥ 100 | exfoliated graphene platelets |
Duration | 30–120 s | — |
Thickness | 1–10 nm | — |
Duration | 1–24 hours | — |
Temperature | 85–100 °C | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 2 nm | — |
Thickness | ≥ 1 nm | — |
Thickness | ≤ 10 nm | — |
supercapacitor
pyrolyzed carbon binder
specific surface area of electrode (claimed lower bound) | ≥ 1500 | exfoliated graphene platelets |
anode specific capacity (claimed lower bound) | ≥ 350 | exfoliated graphene platelets |
supercapacitor specific capacitance (claimed lower bound) | ≥ 100 | exfoliated graphene platelets |
Duration | 30–120 s | — |
Thickness | 1–10 nm | — |
Duration | 1–24 hours | — |
Temperature | 85–100 °C | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 2 nm | — |
Thickness | ≥ 1 nm | — |
Thickness | ≤ 10 nm | — |
supercapacitor
pyrolyzed carbon binder
specific surface area of electrode (claimed lower bound) | ≥ 1500 | exfoliated graphene platelets |
anode specific capacity (claimed lower bound) | ≥ 350 | exfoliated graphene platelets |
supercapacitor specific capacitance (claimed lower bound) | ≥ 100 | exfoliated graphene platelets |
Duration | 30–120 s | — |
Thickness | 1–10 nm | — |
Duration | 1–24 hours | — |
Temperature | 85–100 °C | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 2 nm | — |
Thickness | ≥ 1 nm | — |
Thickness | ≤ 10 nm | — |