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公开(公告)号：US10158122B2
公开(公告)日：2018-12-18
申请号：US15231498
申请日：2016-08-08
Applicant: Nanotek Instruments, Inc.
Inventor： Aruna Zhamu , Yi-Jun Lin , Bor Z. Jang
IPC: H01M4/66 , H01M10/0525 , H01G11/36 , H01G11/68 , H01G11/70
Abstract: A graphene oxide-bonded metal foil current collector in a battery or supercapacitor, comprising: (a) a free-standing, non-supported thin metal foil having a thickness from 1 μm to 30 μm and two primary surfaces; and (b) a thin film of graphene oxide chemically bonded to at least one of the two primary surfaces without using a binder or adhesive wherein the primary surface does not contain a metal oxide layer and the thin film of graphene oxide has a thickness from 10 nm to 10 μm, an oxygen content from 0.1% to 10% by weight, an inter-graphene plane spacing of 0.335 to 0.50 nm, a physical density from 1.3 to 2.2 g/cm3, all graphene oxide sheets being oriented substantially parallel to each other and parallel to the primary surfaces, exhibiting a thermal conductivity greater than 500 W/mK, and/or electrical conductivity greater than 1,500 S/cm when measured alone without the thin metal foil.
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公开(公告)号：US20180305213A1
公开(公告)日：2018-10-25
申请号：US15491714
申请日：2017-04-19
Applicant: Nanotek Instruments, Inc.
Inventor： Yi-Jun Lin , Aruna Zhamu , Bor Z. Jang
IPC: C01B32/192 , C01B32/19 , B01J19/12 , B01J19/22 , C01B32/194
Abstract: Provided is a method of producing graphene from a microwave-expandable un-exfoliated graphite or graphitic carbon, comprising: (a) feeding a powder of the microwave-expandable material onto a non-metallic solid substrate, wherein the powder is in a ribbon shape having a first ribbon width and a first ribbon thickness; (b) moving the ribbon-shape powder into a microwave applicator chamber containing a microwave power zone having a microwave application width (no less than the first ribbon width) and a microwave penetration depth (no less than the first ribbon thickness) so that the entire ribbon-shape powder receives and absorbs microwave power with a sufficient power level for a sufficient length of time to exfoliate and separate the powder for producing graphene sheets; and (c) moving the graphene sheets out of the microwave chamber, cooling the graphene sheets, and collecting the graphene sheets in a collector container or for a subsequent use.
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公开(公告)号：US20180286599A1
公开(公告)日：2018-10-04
申请号：US15475451
申请日：2017-03-31
Applicant: Nanotek Instruments, Inc.
Inventor： Yi-Jun Lin , Aruna Zhamu , Bor Z. Jang
IPC: H01G11/50 , B01J19/12 , H01M4/133 , H01M4/36 , H01M4/587 , H01M10/0525 , H01M10/054 , B82Y30/00 , B82Y40/00
Abstract: Provided is a method of producing graphene directly from a non-intercalated and non-oxidized graphitic material, comprising: (a) dispersing the graphitic material in a liquid solution to form a suspension, wherein the graphitic material has never been previously exposed to chemical intercalation or oxidation; and (b) subjecting the suspension to microwave or radio frequency irradiation with a frequency and an intensity for a length of time sufficient for producing graphene; wherein the liquid solution contains a metal salt dissolved in water, organic solvent, ionic liquid solvent, or a combination thereof. The method is fast (minutes as opposed to hours or days of conventional processes), environmentally benign, and highly scalable.
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公开(公告)号：US10319487B2
公开(公告)日：2019-06-11
申请号：US15353906
申请日：2016-11-17
Applicant: Nanotek Instruments, Inc.
Inventor： Yi-Jun Lin , Aruna Zhamu , Bor Z. Jang
IPC: H01B1/04 , H01B1/08 , H01B1/02 , B05D1/00 , B05D1/02 , B05D1/04 , B05D1/18 , B05D1/12 , C23C4/12 , C23C4/04 , B05D1/24 , B05D5/12 , H05K3/12
Abstract: A process for producing a transparent conductive film, comprising (a) providing a graphene oxide gel; (b) dispersing metal nanowires in the graphene oxide gel to form a suspension; (c) dispensing and depositing the suspension onto a substrate; and (d) removing the liquid medium to form the film. The film is composed of metal nanowires and graphene oxide with a metal nanowire-to-graphene oxide weight ratio from 1/99 to 99/1, wherein the metal nanowires contain no surface-borne metal oxide or metal compound and the film exhibits an optical transparence no less than 80% and sheet resistance no higher than 300 ohm/square. This film can be used as a transparent conductive electrode in an electro-optic device, such as a photovoltaic or solar cell, light-emitting diode, photo-detector, touch screen, electro-wetting display, liquid crystal display, plasma display, LED display, a TV screen, a computer screen, or a mobile phone screen.
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5.发明申请公开(公告)号：US20180040900A1
公开(公告)日：2018-02-08
申请号：US15231498
申请日：2016-08-08
Applicant: Nanotek Instruments, Inc.
Inventor： Aruna Zhamu , Yi-Jun Lin , Bor Z. Jang
IPC: H01M4/66 , H01G11/70 , H01G11/68 , H01M4/04 , H01M10/0525
CPC classification number: H01M4/667 , H01G11/36 , H01G11/68 , H01G11/70 , H01M4/661 , H01M4/663 , H01M10/0525 , Y02E60/13 , Y02T10/7011 , Y02T10/7022
Abstract: A graphene oxide-bonded metal foil current collector in a battery or supercapacitor, comprising: (a) a free-standing, non-supported thin metal foil having a thickness from 1 μm to 30 μm and two primary surfaces; and (b) a thin film of graphene oxide chemically bonded to at least one of the two primary surfaces without using a binder or adhesive wherein the primary surface does not contain a metal oxide layer and the thin film of graphene oxide has a thickness from 10 nm to 10 μm, an oxygen content from 0.1% to 10% by weight, an inter-graphene plane spacing of 0.335 to 0.50 nm, a physical density from 1.3 to 2.2 g/cm3, all graphene oxide sheets being oriented substantially parallel to each other and parallel to the primary surfaces, exhibiting a thermal conductivity greater than 500 W/mK, and/or electrical conductivity greater than 1,500 S/cm when measured alone without the thin metal foil.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20180040874A1
公开(公告)日：2018-02-08
申请号：US15231486
申请日：2016-08-08
Applicant: Nanotek Instruments, Inc.
Inventor： Aruna Zhamu , Yi-Jun Lin , Bor Z. Jang
IPC: H01M4/04 , H01M4/134 , H01M4/1393 , H01M4/1395 , H01G11/68 , H01M4/66 , H01M10/0525 , C23F1/00 , H01M10/054 , H01G11/84 , H01M4/133 , H01M4/48
CPC classification number: H01G11/68 , C01B32/19 , C01B32/198 , H01G11/28 , H01G11/84 , H01M4/661 , H01M4/663 , H01M4/667
Abstract: A process for producing a thin film graphene oxide-bonded metal foil current collector for a battery or supercapacitor, comprising: (a) preparing a graphene oxide gel having graphene oxide (GO) molecules dissolved in a fluid medium; (b) depositing a layer of GO gel onto at least one of two primary surfaces of a metal foil to form a layer of wet graphene oxide gel, wherein the depositing procedure includes shear-induced thinning of the GO gel; (c) partially or completely removing said fluid medium from the deposited wet layer to form a dry film of GO having an inter-plane spacing d002 of 0.4 nm to 1.2 nm as determined by X-ray diffraction; and (d) heat treating the dry film of graphene oxide to form the thin film graphene oxide-bonded metal foil current collector at a heat treatment temperature from 80° C. to 2,500° C.
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公开(公告)号：US10896784B2
公开(公告)日：2021-01-19
申请号：US15475451
申请日：2017-03-31
Applicant: Nanotek Instruments, Inc.
Inventor： Yi-Jun Lin , Aruna Zhamu , Bor Z. Jang
Abstract: Provided is a method of producing graphene directly from a non-intercalated and non-oxidized graphitic material, comprising: (a) dispersing the graphitic material in a liquid solution to form a suspension, wherein the graphitic material has never been previously exposed to chemical intercalation or oxidation; and (b) subjecting the suspension to microwave or radio frequency irradiation with a frequency and an intensity for a length of time sufficient for producing graphene; wherein the liquid solution contains a metal salt dissolved in water, organic solvent, ionic liquid solvent, or a combination thereof. The method is fast (minutes as opposed to hours or days of conventional processes), environmentally benign, and highly scalable.
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公开(公告)号：US10822239B2
公开(公告)日：2020-11-03
申请号：US15491714
申请日：2017-04-19
Applicant: Nanotek Instruments, Inc.
Inventor： Yi-Jun Lin , Aruna Zhamu , Bor Z. Jang
IPC: C01B32/192 , B01J19/12 , B01J19/22 , C01B32/19 , C01B32/194 , C25B1/00
Abstract: Provided is a method of producing graphene from a microwave-expandable un-exfoliated graphite or graphitic carbon, comprising: (a) feeding a powder of the microwave-expandable material onto a non-metallic solid substrate, wherein the powder is in a ribbon shape having a first ribbon width and a first ribbon thickness; (b) moving the ribbon-shape powder into a microwave applicator chamber containing a microwave power zone having a microwave application width (no less than the first ribbon width) and a microwave penetration depth (no less than the first ribbon thickness) so that the entire ribbon-shape powder receives and absorbs microwave power with a sufficient power level for a sufficient length of time to exfoliate and separate the powder for producing graphene sheets; and (c) moving the graphene sheets out of the microwave chamber, cooling the graphene sheets, and collecting the graphene sheets in a collector container or for a subsequent use.
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9.发明授权公开(公告)号：US11961998B2
公开(公告)日：2024-04-16
申请号：US16403826
申请日：2019-05-06
Applicant: Nanotek Instruments, Inc.
Inventor： Yi-Jun Lin , Yen-Po Lin , Sheng-Yi Lu , Bor Z. Jang
CPC classification number: H01M4/366 , H01M4/04 , H01M4/139 , H01M2004/021 , H01M2004/027
Abstract: Provided is a method of producing multiple particulates, the method comprising: (a) dispersing multiple primary particles of an anode active material, having a particle size from 2 nm to 20 μm, and particles of a polymer foam material, having a particle size from 50 nm to 20 μm, and an optional adhesive or binder in a liquid medium to form a slurry; and (b) shaping the slurry and removing the liquid medium to form the multiple particulates having a diameter from 100 nm to 50 μm; wherein at least one of the multiple particulates comprises a polymer foam material having pores and a single or a plurality of the primary particles embedded in or in contact with the polymer foam material, wherein the primary particles have a total solid volume Va, and the pores have a total pore volume Vp, and the volume ratio Vp/Va is from 0.1/1.0 to 10/1.
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公开(公告)号：US10586661B2
公开(公告)日：2020-03-10
申请号：US15231486
申请日：2016-08-08
Applicant: Nanotek Instruments, Inc.
Inventor： Aruna Zhamu , Yi-Jun Lin , Bor Z. Jang
Abstract: A process for producing a thin film graphene oxide-bonded metal foil current collector for a battery or supercapacitor, comprising: (a) preparing a graphene oxide gel having graphene oxide (GO) molecules dissolved in a fluid medium; (b) depositing a layer of GO gel onto at least one of two primary surfaces of a metal foil to form a layer of wet graphene oxide gel, wherein the depositing procedure includes shear-induced thinning of the GO gel; (c) partially or completely removing said fluid medium from the deposited wet layer to form a dry film of GO having an inter-plane spacing d002 of 0.4 nm to 1.2 nm as determined by X-ray diffraction; and (d) heat treating the dry film of graphene oxide to form the thin film graphene oxide-bonded metal foil current collector at a heat treatment temperature from 80° C. to 2,500° C.
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