Patent
US 9,561,955Graphene Oxide Gel Bonded Graphene Composite Films and Processes for Producing Same
Aruna Zhamu, Ming Chao Wang, Wei Xiong, Bor Z. Jang
US
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US 9,561,955Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 A flow chart illustrating various prior art processes of producing exfoliated graphite products (flexible graphite sheets and flexible graphite composites) …
FIG.2 (a) A SEM image of a graphite worm sample after exfoliation of graphite intercalation compounds (GICs); (b) An SEM image of a cross-section of a flexible …
FIG.3 (A) Thermal conductivity, (B) electrical conductivity, and (C) tensile strength of GO gel bonded NGP composites as a function of the GO content in th e …
FIG.4 Thermal conductivity values of GO gel bonded NGP composites and polyimide-based graphitic films as a function of the heat treatment temperature.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A graphene composite thin film composition composed of nano graphene platelets (NGPs) that are dispersed in a polymer matrix of graphene oxide and bonded by a graphene oxide binder, wherein said NGPs contain single-layer graphene or multi-layer graphene sheets having a thickness from 0.335 nm to 100 nm, and said NGPs occupy a weight fraction of 1 % to 99.9% of the total composite weight; and said graphene oxide binder, having an oxygen content of 0.1 %- 40 % by weight based on the total graphene oxide weight, occupies a weight fraction of 0. 1% to 99 % of the total composite weight, and wherein said composite contains NGPs that are chemically bonded together by graphene oxide molecules and said composite contains chemically merged graphene oxide molecules and forms a thin film that is essentially pore-free and has a physical density greater than 1.4 g/cm 3 and with a thickness no greater than 1 mm, and said thin film has an in-plane thermal conductivity greater than 600 Wm -'K-'and an in-plane electrical conductivity greater than 2,000 S/cm.
The graphene composite thin film composition as defined in claim 1, which has a thickness less than 100 pm.
The graphene composite thin film composition as defined in claim 1, which has a thickness greater than 10 p m, but less than 100 pm.
The graphene composite thin film composition as defined in claim 1 wherein said multi-layer graphene sheets have a thickness of 6.7 nm to 20 nm or said film has a thickness not greater than 50 pm.
The graphene composite thin film composition as defined in claim 1, wherein said nano graphene platelets are pristine graphene containing no oxygen.
The graphene composite thin film composition as defined in claim 1, wherein said nano graphene platelets are pristine graphene containing no oxygen and said pristine 2 graphene is obtained from an oxidation-free procedure selected from direct ultrasonication, supercritical fluid intercalation, or alkali metal intercalation.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide binder has an oxygen content of 1 -10% by weight based on the total graphene oxide weight which is measured after said graphene composite film composition is made.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide binder occupies a weight fraction of 1 % to 40% of the total composite weight.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide is obtained from a graphene oxide gel, which gel is composed of graphene oxide molecules dispersed in an acidic medium having a pH value of no higher than 5 and said graphene oxide molecules have an oxy g en content no less than 20 % by weight while in a gel state.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide is obtained from a graphene oxide gel, which gel is obtained by immersing a graphitic material in a powder or fibrous form in an oxidizing liquid medium in a reaction vessel at a reaction temperature for a length of time sufficient to obtain a graphene oxide gel composed of graphene oxide molecules dispersed in the liquid medium and said graphene oxide molecules have an oxygen content no less than 20 % by weight and a molecular weight less than 43,000 g/mole while in a gel state.
The graphene composite thin film composition as defined in claim 1 wherein said NGPs are produced from a graphitic material selected from natural graphite, artificial graphite, meso-phase carbon, meso-phase pitch, meso-carbon micro-bead, soft carbon, hard carbon, coke, carbon fiber, carbon nano-fiber, carbon nano-tube, or a combination thereof.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has a thermal conductivity greater than 1,000 Wm -K-'.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has a thermal conductivity greater than 1,700 Wm -K-'.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 3000 S/cm.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 3000 S/cm and a thermal conductivity greater than 1,000 Wm 1 K⁻¹.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 1,500 S/cm, a thermal conductivity greater than 600 Wm-K-, a physical density greater than 1.4 g/cm3, and a tensile strength greater than 10 MPa.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 2,000 S/cm, a thermal conductivity greater than 800 Wm 1 K', a physical density greater than 1.8 g/cm3, and a tensile stren g th greater than 40 MPa.
The graphene composite thin film of claim 1, having an electrical conductivity greater than 3,000 S/cm, a thermal conductivity g reater than 1,500 Wm 'K- 1, a physical density greater than 2.0 g/cm 3, and a tensile strength greater than 40 MPa.
A process for producing a graphene composite film of claim 1, said process comprising: (a) preparing single-layer or multilayer graphene platelets from a graphitic material; (b) preparing a graphene oxide gel having graphene oxide molecules dispersed in a fluid medium, wherein said graphene oxide gel is optically transparent or translucent; (c) mixing said graphene platelets in said graphene oxide gel to form a composite gel; and (d) forming said composite gel into said composite thin film by removing said fluid medium. withdrawn
A graphene composite composition composed of nano graphene platelets (NGPs) bonded by a graphene oxide binder obtained from a graphene oxide gel, wherein said NGPs contain single-layer graphene or multi-layer graphene sheets having a thickness from 0. 335 nm to 100 nm, and said NGPs occupy a weight fraction of 1% to 99.9% of the total composite weight; and said graphene oxide binder, having an oxygen content of 0.1 %-4 0% by weight based on the total graphene oxide weight, occupies a weight fraction of 0.1 % to 99% of the total composite weight.
Layer stacks claimed or described, ordered top of device to substrate.
graphene composite thin film
Materials described outside the worked examples.
nano graphene platelets (NGPs)
graphene oxide binder
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG.2 (a) A SEM image of a graphite worm sample after exfoliation of graphite intercalation compounds (GICs); (b) An SEM image of a cross-section of a flexible …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thermal Conductivity In Plane | ≥ 600 W/mK | graphene composite thin film |
Fet Resistance | ≥ 2000 S/cm |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,561,955Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 A flow chart illustrating various prior art processes of producing exfoliated graphite products (flexible graphite sheets and flexible graphite composites) …
FIG.2 (a) A SEM image of a graphite worm sample after exfoliation of graphite intercalation compounds (GICs); (b) An SEM image of a cross-section of a flexible …
FIG.3 (A) Thermal conductivity, (B) electrical conductivity, and (C) tensile strength of GO gel bonded NGP composites as a function of the GO content in th e …
FIG.4 Thermal conductivity values of GO gel bonded NGP composites and polyimide-based graphitic films as a function of the heat treatment temperature.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A graphene composite thin film composition composed of nano graphene platelets (NGPs) that are dispersed in a polymer matrix of graphene oxide and bonded by a graphene oxide binder, wherein said NGPs contain single-layer graphene or multi-layer graphene sheets having a thickness from 0.335 nm to 100 nm, and said NGPs occupy a weight fraction of 1 % to 99.9% of the total composite weight; and said graphene oxide binder, having an oxygen content of 0.1 %- 40 % by weight based on the total graphene oxide weight, occupies a weight fraction of 0. 1% to 99 % of the total composite weight, and wherein said composite contains NGPs that are chemically bonded together by graphene oxide molecules and said composite contains chemically merged graphene oxide molecules and forms a thin film that is essentially pore-free and has a physical density greater than 1.4 g/cm 3 and with a thickness no greater than 1 mm, and said thin film has an in-plane thermal conductivity greater than 600 Wm -'K-'and an in-plane electrical conductivity greater than 2,000 S/cm.
The graphene composite thin film composition as defined in claim 1, which has a thickness less than 100 pm.
The graphene composite thin film composition as defined in claim 1, which has a thickness greater than 10 p m, but less than 100 pm.
The graphene composite thin film composition as defined in claim 1 wherein said multi-layer graphene sheets have a thickness of 6.7 nm to 20 nm or said film has a thickness not greater than 50 pm.
The graphene composite thin film composition as defined in claim 1, wherein said nano graphene platelets are pristine graphene containing no oxygen.
The graphene composite thin film composition as defined in claim 1, wherein said nano graphene platelets are pristine graphene containing no oxygen and said pristine 2 graphene is obtained from an oxidation-free procedure selected from direct ultrasonication, supercritical fluid intercalation, or alkali metal intercalation.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide binder has an oxygen content of 1 -10% by weight based on the total graphene oxide weight which is measured after said graphene composite film composition is made.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide binder occupies a weight fraction of 1 % to 40% of the total composite weight.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide is obtained from a graphene oxide gel, which gel is composed of graphene oxide molecules dispersed in an acidic medium having a pH value of no higher than 5 and said graphene oxide molecules have an oxy g en content no less than 20 % by weight while in a gel state.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide is obtained from a graphene oxide gel, which gel is obtained by immersing a graphitic material in a powder or fibrous form in an oxidizing liquid medium in a reaction vessel at a reaction temperature for a length of time sufficient to obtain a graphene oxide gel composed of graphene oxide molecules dispersed in the liquid medium and said graphene oxide molecules have an oxygen content no less than 20 % by weight and a molecular weight less than 43,000 g/mole while in a gel state.
The graphene composite thin film composition as defined in claim 1 wherein said NGPs are produced from a graphitic material selected from natural graphite, artificial graphite, meso-phase carbon, meso-phase pitch, meso-carbon micro-bead, soft carbon, hard carbon, coke, carbon fiber, carbon nano-fiber, carbon nano-tube, or a combination thereof.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has a thermal conductivity greater than 1,000 Wm -K-'.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has a thermal conductivity greater than 1,700 Wm -K-'.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 3000 S/cm.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 3000 S/cm and a thermal conductivity greater than 1,000 Wm 1 K⁻¹.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 1,500 S/cm, a thermal conductivity greater than 600 Wm-K-, a physical density greater than 1.4 g/cm3, and a tensile strength greater than 10 MPa.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 2,000 S/cm, a thermal conductivity greater than 800 Wm 1 K', a physical density greater than 1.8 g/cm3, and a tensile stren g th greater than 40 MPa.
The graphene composite thin film of claim 1, having an electrical conductivity greater than 3,000 S/cm, a thermal conductivity g reater than 1,500 Wm 'K- 1, a physical density greater than 2.0 g/cm 3, and a tensile strength greater than 40 MPa.
A process for producing a graphene composite film of claim 1, said process comprising: (a) preparing single-layer or multilayer graphene platelets from a graphitic material; (b) preparing a graphene oxide gel having graphene oxide molecules dispersed in a fluid medium, wherein said graphene oxide gel is optically transparent or translucent; (c) mixing said graphene platelets in said graphene oxide gel to form a composite gel; and (d) forming said composite gel into said composite thin film by removing said fluid medium. withdrawn
A graphene composite composition composed of nano graphene platelets (NGPs) bonded by a graphene oxide binder obtained from a graphene oxide gel, wherein said NGPs contain single-layer graphene or multi-layer graphene sheets having a thickness from 0. 335 nm to 100 nm, and said NGPs occupy a weight fraction of 1% to 99.9% of the total composite weight; and said graphene oxide binder, having an oxygen content of 0.1 %-4 0% by weight based on the total graphene oxide weight, occupies a weight fraction of 0.1 % to 99% of the total composite weight.
Layer stacks claimed or described, ordered top of device to substrate.
graphene composite thin film
Materials described outside the worked examples.
nano graphene platelets (NGPs)
graphene oxide binder
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG.2 (a) A SEM image of a graphite worm sample after exfoliation of graphite intercalation compounds (GICs); (b) An SEM image of a cross-section of a flexible …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thermal Conductivity In Plane | ≥ 600 W/mK | graphene composite thin film |
Fet Resistance | ≥ 2000 S/cm |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,561,955Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 A flow chart illustrating various prior art processes of producing exfoliated graphite products (flexible graphite sheets and flexible graphite composites) …
FIG.2 (a) A SEM image of a graphite worm sample after exfoliation of graphite intercalation compounds (GICs); (b) An SEM image of a cross-section of a flexible …
FIG.3 (A) Thermal conductivity, (B) electrical conductivity, and (C) tensile strength of GO gel bonded NGP composites as a function of the GO content in th e …
FIG.4 Thermal conductivity values of GO gel bonded NGP composites and polyimide-based graphitic films as a function of the heat treatment temperature.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A graphene composite thin film composition composed of nano graphene platelets (NGPs) that are dispersed in a polymer matrix of graphene oxide and bonded by a graphene oxide binder, wherein said NGPs contain single-layer graphene or multi-layer graphene sheets having a thickness from 0.335 nm to 100 nm, and said NGPs occupy a weight fraction of 1 % to 99.9% of the total composite weight; and said graphene oxide binder, having an oxygen content of 0.1 %- 40 % by weight based on the total graphene oxide weight, occupies a weight fraction of 0. 1% to 99 % of the total composite weight, and wherein said composite contains NGPs that are chemically bonded together by graphene oxide molecules and said composite contains chemically merged graphene oxide molecules and forms a thin film that is essentially pore-free and has a physical density greater than 1.4 g/cm 3 and with a thickness no greater than 1 mm, and said thin film has an in-plane thermal conductivity greater than 600 Wm -'K-'and an in-plane electrical conductivity greater than 2,000 S/cm.
The graphene composite thin film composition as defined in claim 1, which has a thickness less than 100 pm.
The graphene composite thin film composition as defined in claim 1, which has a thickness greater than 10 p m, but less than 100 pm.
The graphene composite thin film composition as defined in claim 1 wherein said multi-layer graphene sheets have a thickness of 6.7 nm to 20 nm or said film has a thickness not greater than 50 pm.
The graphene composite thin film composition as defined in claim 1, wherein said nano graphene platelets are pristine graphene containing no oxygen.
The graphene composite thin film composition as defined in claim 1, wherein said nano graphene platelets are pristine graphene containing no oxygen and said pristine 2 graphene is obtained from an oxidation-free procedure selected from direct ultrasonication, supercritical fluid intercalation, or alkali metal intercalation.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide binder has an oxygen content of 1 -10% by weight based on the total graphene oxide weight which is measured after said graphene composite film composition is made.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide binder occupies a weight fraction of 1 % to 40% of the total composite weight.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide is obtained from a graphene oxide gel, which gel is composed of graphene oxide molecules dispersed in an acidic medium having a pH value of no higher than 5 and said graphene oxide molecules have an oxy g en content no less than 20 % by weight while in a gel state.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide is obtained from a graphene oxide gel, which gel is obtained by immersing a graphitic material in a powder or fibrous form in an oxidizing liquid medium in a reaction vessel at a reaction temperature for a length of time sufficient to obtain a graphene oxide gel composed of graphene oxide molecules dispersed in the liquid medium and said graphene oxide molecules have an oxygen content no less than 20 % by weight and a molecular weight less than 43,000 g/mole while in a gel state.
The graphene composite thin film composition as defined in claim 1 wherein said NGPs are produced from a graphitic material selected from natural graphite, artificial graphite, meso-phase carbon, meso-phase pitch, meso-carbon micro-bead, soft carbon, hard carbon, coke, carbon fiber, carbon nano-fiber, carbon nano-tube, or a combination thereof.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has a thermal conductivity greater than 1,000 Wm -K-'.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has a thermal conductivity greater than 1,700 Wm -K-'.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 3000 S/cm.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 3000 S/cm and a thermal conductivity greater than 1,000 Wm 1 K⁻¹.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 1,500 S/cm, a thermal conductivity greater than 600 Wm-K-, a physical density greater than 1.4 g/cm3, and a tensile strength greater than 10 MPa.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 2,000 S/cm, a thermal conductivity greater than 800 Wm 1 K', a physical density greater than 1.8 g/cm3, and a tensile stren g th greater than 40 MPa.
The graphene composite thin film of claim 1, having an electrical conductivity greater than 3,000 S/cm, a thermal conductivity g reater than 1,500 Wm 'K- 1, a physical density greater than 2.0 g/cm 3, and a tensile strength greater than 40 MPa.
A process for producing a graphene composite film of claim 1, said process comprising: (a) preparing single-layer or multilayer graphene platelets from a graphitic material; (b) preparing a graphene oxide gel having graphene oxide molecules dispersed in a fluid medium, wherein said graphene oxide gel is optically transparent or translucent; (c) mixing said graphene platelets in said graphene oxide gel to form a composite gel; and (d) forming said composite gel into said composite thin film by removing said fluid medium. withdrawn
A graphene composite composition composed of nano graphene platelets (NGPs) bonded by a graphene oxide binder obtained from a graphene oxide gel, wherein said NGPs contain single-layer graphene or multi-layer graphene sheets having a thickness from 0. 335 nm to 100 nm, and said NGPs occupy a weight fraction of 1% to 99.9% of the total composite weight; and said graphene oxide binder, having an oxygen content of 0.1 %-4 0% by weight based on the total graphene oxide weight, occupies a weight fraction of 0.1 % to 99% of the total composite weight.
Layer stacks claimed or described, ordered top of device to substrate.
graphene composite thin film
Materials described outside the worked examples.
nano graphene platelets (NGPs)
graphene oxide binder
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG.2 (a) A SEM image of a graphite worm sample after exfoliation of graphite intercalation compounds (GICs); (b) An SEM image of a cross-section of a flexible …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thermal Conductivity In Plane | ≥ 600 W/mK | graphene composite thin film |
Fet Resistance | ≥ 2000 S/cm |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,561,955Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 A flow chart illustrating various prior art processes of producing exfoliated graphite products (flexible graphite sheets and flexible graphite composites) …
FIG.2 (a) A SEM image of a graphite worm sample after exfoliation of graphite intercalation compounds (GICs); (b) An SEM image of a cross-section of a flexible …
FIG.3 (A) Thermal conductivity, (B) electrical conductivity, and (C) tensile strength of GO gel bonded NGP composites as a function of the GO content in th e …
FIG.4 Thermal conductivity values of GO gel bonded NGP composites and polyimide-based graphitic films as a function of the heat treatment temperature.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A graphene composite thin film composition composed of nano graphene platelets (NGPs) that are dispersed in a polymer matrix of graphene oxide and bonded by a graphene oxide binder, wherein said NGPs contain single-layer graphene or multi-layer graphene sheets having a thickness from 0.335 nm to 100 nm, and said NGPs occupy a weight fraction of 1 % to 99.9% of the total composite weight; and said graphene oxide binder, having an oxygen content of 0.1 %- 40 % by weight based on the total graphene oxide weight, occupies a weight fraction of 0. 1% to 99 % of the total composite weight, and wherein said composite contains NGPs that are chemically bonded together by graphene oxide molecules and said composite contains chemically merged graphene oxide molecules and forms a thin film that is essentially pore-free and has a physical density greater than 1.4 g/cm 3 and with a thickness no greater than 1 mm, and said thin film has an in-plane thermal conductivity greater than 600 Wm -'K-'and an in-plane electrical conductivity greater than 2,000 S/cm.
The graphene composite thin film composition as defined in claim 1, which has a thickness less than 100 pm.
The graphene composite thin film composition as defined in claim 1, which has a thickness greater than 10 p m, but less than 100 pm.
The graphene composite thin film composition as defined in claim 1 wherein said multi-layer graphene sheets have a thickness of 6.7 nm to 20 nm or said film has a thickness not greater than 50 pm.
The graphene composite thin film composition as defined in claim 1, wherein said nano graphene platelets are pristine graphene containing no oxygen.
The graphene composite thin film composition as defined in claim 1, wherein said nano graphene platelets are pristine graphene containing no oxygen and said pristine 2 graphene is obtained from an oxidation-free procedure selected from direct ultrasonication, supercritical fluid intercalation, or alkali metal intercalation.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide binder has an oxygen content of 1 -10% by weight based on the total graphene oxide weight which is measured after said graphene composite film composition is made.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide binder occupies a weight fraction of 1 % to 40% of the total composite weight.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide is obtained from a graphene oxide gel, which gel is composed of graphene oxide molecules dispersed in an acidic medium having a pH value of no higher than 5 and said graphene oxide molecules have an oxy g en content no less than 20 % by weight while in a gel state.
The graphene composite thin film composition as defined in claim 1 wherein said graphene oxide is obtained from a graphene oxide gel, which gel is obtained by immersing a graphitic material in a powder or fibrous form in an oxidizing liquid medium in a reaction vessel at a reaction temperature for a length of time sufficient to obtain a graphene oxide gel composed of graphene oxide molecules dispersed in the liquid medium and said graphene oxide molecules have an oxygen content no less than 20 % by weight and a molecular weight less than 43,000 g/mole while in a gel state.
The graphene composite thin film composition as defined in claim 1 wherein said NGPs are produced from a graphitic material selected from natural graphite, artificial graphite, meso-phase carbon, meso-phase pitch, meso-carbon micro-bead, soft carbon, hard carbon, coke, carbon fiber, carbon nano-fiber, carbon nano-tube, or a combination thereof.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has a thermal conductivity greater than 1,000 Wm -K-'.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has a thermal conductivity greater than 1,700 Wm -K-'.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 3000 S/cm.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 3000 S/cm and a thermal conductivity greater than 1,000 Wm 1 K⁻¹.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 1,500 S/cm, a thermal conductivity greater than 600 Wm-K-, a physical density greater than 1.4 g/cm3, and a tensile strength greater than 10 MPa.
The graphene composite thin film composition as defined in claim 1 wherein said thin film has an electrical conductivity greater than 2,000 S/cm, a thermal conductivity greater than 800 Wm 1 K', a physical density greater than 1.8 g/cm3, and a tensile stren g th greater than 40 MPa.
The graphene composite thin film of claim 1, having an electrical conductivity greater than 3,000 S/cm, a thermal conductivity g reater than 1,500 Wm 'K- 1, a physical density greater than 2.0 g/cm 3, and a tensile strength greater than 40 MPa.
A process for producing a graphene composite film of claim 1, said process comprising: (a) preparing single-layer or multilayer graphene platelets from a graphitic material; (b) preparing a graphene oxide gel having graphene oxide molecules dispersed in a fluid medium, wherein said graphene oxide gel is optically transparent or translucent; (c) mixing said graphene platelets in said graphene oxide gel to form a composite gel; and (d) forming said composite gel into said composite thin film by removing said fluid medium. withdrawn
A graphene composite composition composed of nano graphene platelets (NGPs) bonded by a graphene oxide binder obtained from a graphene oxide gel, wherein said NGPs contain single-layer graphene or multi-layer graphene sheets having a thickness from 0. 335 nm to 100 nm, and said NGPs occupy a weight fraction of 1% to 99.9% of the total composite weight; and said graphene oxide binder, having an oxygen content of 0.1 %-4 0% by weight based on the total graphene oxide weight, occupies a weight fraction of 0.1 % to 99% of the total composite weight.
Layer stacks claimed or described, ordered top of device to substrate.
graphene composite thin film
Materials described outside the worked examples.
nano graphene platelets (NGPs)
graphene oxide binder
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG.2 (a) A SEM image of a graphite worm sample after exfoliation of graphite intercalation compounds (GICs); (b) An SEM image of a cross-section of a flexible …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thermal Conductivity In Plane | ≥ 600 W/mK | graphene composite thin film |
Fet Resistance | ≥ 2000 S/cm |
Related documents with shared materials, methods, properties, or citations.
graphene composite thin film
pristine graphene
graphene oxide gel
graphitic material
reduced graphene oxide (RGO)
FIG.3 (A) Thermal conductivity, (B) electrical conductivity, and (C) tensile strength of GO gel bonded NGP composites as a function of the GO content in th e …
Physical Density | ≥ 1.4 g/cm3 | graphene composite thin film |
Thermal Conductivity In Plane | ≥ 1000 W/mK | graphene composite thin film |
Thermal Conductivity In Plane | ≥ 1700 W/mK | graphene composite thin film |
Electrical Conductivity | ≥ 3000 S/cm | graphene composite thin film |
Tensile Strength | ≥ 10 MPa | graphene composite thin film |
Tensile Strength | ≥ 40 MPa | graphene composite thin film |
Physical Density | ≥ 1.8 g/cm3 | graphene composite thin film |
Physical Density | ≥ 2 g/cm3 | graphene composite thin film |
Thermal Conductivity In Plane | ≥ 1500 W/mK | graphene composite thin film |
Duration | 15–120 s | — |
Thickness | 0.335–100 nm | — |
Duration | 900–7200 s | — |
— | 140–190 W | — |
— | 3000–5000 W | — |
— | 140–300 W | — |
— | 600–2230 W | — |
Temperature | 2500–3000 °C | — |
Thickness | ≥ 0.125 mm | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 1 mm | — |
— | ≥ 800 W | — |
— | ≥ 1800 W | — |
— | ≥ 1600 W | — |
Thickness | 6.7–20 nm | — |
Thickness | 100–335 nm | — |
Thickness | 3.35–33.5 nm | — |
graphene composite thin film
pristine graphene
graphene oxide gel
graphitic material
reduced graphene oxide (RGO)
FIG.3 (A) Thermal conductivity, (B) electrical conductivity, and (C) tensile strength of GO gel bonded NGP composites as a function of the GO content in th e …
Physical Density | ≥ 1.4 g/cm3 | graphene composite thin film |
Thermal Conductivity In Plane | ≥ 1000 W/mK | graphene composite thin film |
Thermal Conductivity In Plane | ≥ 1700 W/mK | graphene composite thin film |
Electrical Conductivity | ≥ 3000 S/cm | graphene composite thin film |
Tensile Strength | ≥ 10 MPa | graphene composite thin film |
Tensile Strength | ≥ 40 MPa | graphene composite thin film |
Physical Density | ≥ 1.8 g/cm3 | graphene composite thin film |
Physical Density | ≥ 2 g/cm3 | graphene composite thin film |
Thermal Conductivity In Plane | ≥ 1500 W/mK | graphene composite thin film |
Duration | 15–120 s | — |
Thickness | 0.335–100 nm | — |
Duration | 900–7200 s | — |
— | 140–190 W | — |
— | 3000–5000 W | — |
— | 140–300 W | — |
— | 600–2230 W | — |
Temperature | 2500–3000 °C | — |
Thickness | ≥ 0.125 mm | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 1 mm | — |
— | ≥ 800 W | — |
— | ≥ 1800 W | — |
— | ≥ 1600 W | — |
Thickness | 6.7–20 nm | — |
Thickness | 100–335 nm | — |
Thickness | 3.35–33.5 nm | — |
graphene composite thin film
pristine graphene
graphene oxide gel
graphitic material
reduced graphene oxide (RGO)
FIG.3 (A) Thermal conductivity, (B) electrical conductivity, and (C) tensile strength of GO gel bonded NGP composites as a function of the GO content in th e …
Physical Density | ≥ 1.4 g/cm3 | graphene composite thin film |
Thermal Conductivity In Plane | ≥ 1000 W/mK | graphene composite thin film |
Thermal Conductivity In Plane | ≥ 1700 W/mK | graphene composite thin film |
Electrical Conductivity | ≥ 3000 S/cm | graphene composite thin film |
Tensile Strength | ≥ 10 MPa | graphene composite thin film |
Tensile Strength | ≥ 40 MPa | graphene composite thin film |
Physical Density | ≥ 1.8 g/cm3 | graphene composite thin film |
Physical Density | ≥ 2 g/cm3 | graphene composite thin film |
Thermal Conductivity In Plane | ≥ 1500 W/mK | graphene composite thin film |
Duration | 15–120 s | — |
Thickness | 0.335–100 nm | — |
Duration | 900–7200 s | — |
— | 140–190 W | — |
— | 3000–5000 W | — |
— | 140–300 W | — |
— | 600–2230 W | — |
Temperature | 2500–3000 °C | — |
Thickness | ≥ 0.125 mm | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 1 mm | — |
— | ≥ 800 W | — |
— | ≥ 1800 W | — |
— | ≥ 1600 W | — |
Thickness | 6.7–20 nm | — |
Thickness | 100–335 nm | — |
Thickness | 3.35–33.5 nm | — |
graphene composite thin film
pristine graphene
graphene oxide gel
graphitic material
reduced graphene oxide (RGO)
FIG.3 (A) Thermal conductivity, (B) electrical conductivity, and (C) tensile strength of GO gel bonded NGP composites as a function of the GO content in th e …
Physical Density | ≥ 1.4 g/cm3 | graphene composite thin film |
Thermal Conductivity In Plane | ≥ 1000 W/mK | graphene composite thin film |
Thermal Conductivity In Plane | ≥ 1700 W/mK | graphene composite thin film |
Electrical Conductivity | ≥ 3000 S/cm | graphene composite thin film |
Tensile Strength | ≥ 10 MPa | graphene composite thin film |
Tensile Strength | ≥ 40 MPa | graphene composite thin film |
Physical Density | ≥ 1.8 g/cm3 | graphene composite thin film |
Physical Density | ≥ 2 g/cm3 | graphene composite thin film |
Thermal Conductivity In Plane | ≥ 1500 W/mK | graphene composite thin film |
Duration | 15–120 s | — |
Thickness | 0.335–100 nm | — |
Duration | 900–7200 s | — |
— | 140–190 W | — |
— | 3000–5000 W | — |
— | 140–300 W | — |
— | 600–2230 W | — |
Temperature | 2500–3000 °C | — |
Thickness | ≥ 0.125 mm | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 1 mm | — |
— | ≥ 800 W | — |
— | ≥ 1800 W | — |
— | ≥ 1600 W | — |
Thickness | 6.7–20 nm | — |
Thickness | 100–335 nm | — |
Thickness | 3.35–33.5 nm | — |