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公开(公告)号：US20230030305A1
公开(公告)日：2023-02-02
申请号：US17874747
申请日：2022-07-27
IPC分类号： C01B32/192 , H01M10/36 , H01M10/0525
摘要： Devices and methods are presented that comprise graphene platelets with controlled dimension and high carbon to oxygen ratio, and that further include a heteroatom or heteroionic species, an alkylammonium polysulfide, or both, preferably non-covalently bound to the graphene platelets. Such compositions have significantly improved conductive properties as opposed to unmodified graphene platelets and can be easily produced at mass quantities and low cost.
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公开(公告)号：US11549161B2
公开(公告)日：2023-01-10
申请号：US17472467
申请日：2021-09-10
发明人： Keqing Luo , Yongquan Zhu , Bo Du , Xuquan Zhu
IPC分类号： C22C1/10 , C01B32/194 , C01B32/192 , C22C1/05
摘要： A graphene-reinforced alloy composite material and a preparation method thereof are disclosed. The method includes preparing a porous graphene colloid, smelting a first-part alloy, pouring it into the porous graphene colloid to be formed, subjecting the formed product to a hot extrusion, and pulverizing into a powder I; smelting a second-part alloy into an alloy melt II, adding a high-purity silicon powder therein, mixing by stirring, and atomizing to obtain a powder II; mixing the powder I and the powder II, to obtain a pretreated alloy powder; placing the pretreated alloy powder in a high-purity ark, transferring the high-purity ark to a high-temperature tubular furnace, subjecting the pretreated alloy powder to a redox treatment, and introducing methane and hydrogen to grow graphene, to obtain a coated alloy powder; subjecting the coated alloy powder to a pre-compressing molding and sintering, to obtain the graphene-reinforced alloy composite material.
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公开(公告)号：US11545309B2
公开(公告)日：2023-01-03
申请号：US17169655
申请日：2021-02-08
摘要： The present invention relates in part to a method of fabricating graphene structures from graphene oxide by reducing the graphene oxide on a patterned substrate. The invention also relates in part to graphene structures produced using said method and electrodes and capacitors comprising said graphene structures.
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公开(公告)号：US20220332586A1
公开(公告)日：2022-10-20
申请号：US17229983
申请日：2021-04-14
发明人： Miao HE , Yandong XIE , Yefeng FENG , Deping XIONG
IPC分类号： C01B32/194 , C01B32/192 , C07C221/00 , H01G11/42
摘要： The present invention discloses a preparation method of 2,6-diaminoanthraquinone bifunctional covalently grafted graphene as a negative material of a supercapacitor, which includes: first dispersing graphite oxide in deionized water; after stirring and ultrasonic treatment, reducing the graphite oxide into reduced graphene oxide by using a hydrazine hydrate, and vacuum drying at 40-80° C.; dispersing the reduced graphene oxide in a DMF solution with 2,6-diaminoanthraquinone, and stirring and performing the ultrasonic treatment again; at 60-90° C., adding isoamyl nitrite, and reacting for 18-24 h; and washing reaction products with ethanol and deionized water for multiple times, and finally freeze drying to obtain a product.
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公开(公告)号：US20220258139A1
公开(公告)日：2022-08-18
申请号：US17228874
申请日：2021-04-13
发明人： Wonyong CHOI , Shinbi LEE
IPC分类号： B01J23/89 , C01B32/198 , C01B32/192 , B01J21/06 , B01J37/34 , B01J37/06 , B01J37/04 , B01J37/03 , B01J21/18 , C01B21/04 , B01J35/00 , B01J35/02 , C02F1/32 , C02F1/72
摘要： Proposed are a photocatalyst, including titanium dioxide particles including titanium dioxide (TiO2), a carbon material located on all or part of the surface of the titanium dioxide particles and including at least one selected from the group consisting of graphene, reduced graphene oxide (rGO), and carbon nanotubes (CNTs), and bimetallic nanoparticles supported on the carbon material and including first metal nanoparticles and second metal nanoparticles, and a water treatment method using the same. In the photocatalyst and the water treatment method using the same, the photocatalyst including bimetallic nanoparticles and graphene oxide is prepared, thereby exhibiting high reduction efficiency and high selectivity to nitrogen gas even without the use of an external electron donor.
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公开(公告)号：US11325151B2
公开(公告)日：2022-05-10
申请号：US16890488
申请日：2020-06-02
申请人： Grafoid, Inc.
IPC分类号： B05D1/04 , B05D3/00 , C01B32/184 , C01B32/192 , C01B32/194 , C01B32/198 , H01M4/62 , B82Y40/00
摘要： A coating process is described that coats a coil-to-coil continuous substrate with a graphene-like coating. The coating process includes cleaning and activating a substrate, applying a graphene oxide dispersion to the substrate, drying the coated sub-strate, and exposing the dried coating to VUV radiation under a dry atmosphere. The atmosphere for the last step includes one or more inert gases and optionally one or more reactive gases to repair defects in the coating and/or to functionalize the coating. This coating process allows for the formation of a polygranular graphene-like coating intimately in contact with the substrate. The graphene-like coating coats the substrate with multiple monolayers of graphene in a continuous manner.
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公开(公告)号：US11225415B2
公开(公告)日：2022-01-18
申请号：US16054868
申请日：2018-08-03
IPC分类号： C01B32/192 , B01J8/08 , B01J8/16 , B01J8/10 , B01J19/00 , B01J19/02 , B01J19/12 , C01G39/06 , C01B32/19 , B01J19/18 , B01J19/10 , B82Y30/00 , B82Y40/00
摘要： A system for extracting two dimensional materials from a bulk material by functionalization of the bulk material in a reactor.
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公开(公告)号：US20210387856A1
公开(公告)日：2021-12-16
申请号：US17461324
申请日：2021-08-30
申请人： G6 Materials Corp.
IPC分类号： C01B32/19 , C01B32/196 , C01B32/192 , C01B32/194 , B07B7/00
摘要： A method for enrichment of a mixture of graphene nanoplatelets (GNP) may include providing GNP into a column. The method may also include passing the GNP through an electrostatic field in a drift column to separate thinner GNP from thicker GNP to increase the content of the thinner GNP. The method may further include coupling a feeder to the drift column to accept the GNP and providing electrical charge to the GNP by the drift column with a charging module. The method may still further include generating the electrostatic field with an electrostatic field generator in the drift column to increase the content of GNP with smaller thickness.
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69.发明授权公开(公告)号：US11195667B2
公开(公告)日：2021-12-07
申请号：US15181802
申请日：2016-06-14
IPC分类号： C01G23/053 , C01B32/19 , C01B32/192 , C09D11/52 , H01G9/20 , B82Y40/00 , H01L21/00 , B82Y30/00 , B01J35/00 , B01J21/18
摘要： In one aspect of the invention, a dye sensitized solar cell has a counter-electrode including carbon-titania nanocomposite thin films made by forming a carbon-based ink; forming a titania (TiO2) solution; blade-coating a mechanical mixture of the carbon-based ink and the titania solution onto a substrate; and annealing the blade-coated substrate at a first temperature for a first period of time to obtain the carbon-based titania nanocomposite thin films. In certain embodiments, the carbon-based titania nanocomposite thin films may include solvent-exfoliated graphene titania (SEG-TiO2) nanocomposite thin films, or single walled carbon nanotube titania (SWCNT-TiO2) nanocomposite thin films.
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公开(公告)号：US11167992B2
公开(公告)日：2021-11-09
申请号：US16458588
申请日：2019-07-01
发明人： Bo Yang , Shuanghong Zhang , Maodong Li , Wei Zhai , Fang Wen , Yue Li , Huachao Guo , Zhigang Wang , Guojia Huang , Shiping Li , Zhenling Wu , Yingyi He
IPC分类号： C01B32/19 , C01B32/192 , C01G49/10 , C07C275/02
摘要： Provided is a method for preparing graphene by liquid-phase ball milling exfoliation, including following steps: mixing a transition metal halide salt, a nitrogen source substance and an organic solvent to prepare an intercalation agent; mixing the intercalation agent with graphite, carrying out ball milling, and then performing centrifugation to obtain a graphite intercalation compound; washing and filtering the graphite intercalation compound obtained, adding an expansion agent, and carrying out ultrasonic agitation to obtain a graphene dispersion; and washing, filtering and drying the graphene dispersion to obtain graphene powder.
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