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公开(公告)号：US20230361298A1
公开(公告)日：2023-11-09
申请号：US17528130
申请日：2020-05-14
发明人： AKSHAY VIVEK SINGHAL , ANSHUL KUMAR SHARMA , KUNAL PAUL , ARVIND BHARDWAJ , SYED SHAJAR ALI MAM , HEMANT CHARAYA
CPC分类号： H01M4/583 , H01M4/0404 , H01M4/622 , H01M4/0435
摘要： The various embodiments of the present invention provide a method of fabricating carbon felt based electrodes without any binder additive. A coating of conductive polymer adhesives is applied on the current collector. The carbon felts are placed on either side of the current collector to get an assembly. The assembly comprising current collector and carbon felt is placed between the plates of hot press with predetermined conditions for curing the adhesive applied on the surface of current collector and to obtain sandwich structure of electrode. The sandwich structure of electrode is subjected under a roller and pressed depending on required thickness and porosity of the electrodes. The electrodes are cut into desired shape using electrode cutting die in tailoring process. The prepared carbon felt based electrode illustrates high flexibility and mechanical robustness when compared to carbon felt electrodes that are binder based and brittle in nature.
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公开(公告)号：US20230335834A1
公开(公告)日：2023-10-19
申请号：US18024923
申请日：2021-09-04
CPC分类号： H01M12/02 , H01M4/12 , H01M12/065
摘要： The embodiments of the present invention provide a system for optimizing a performance of metal-air fuel cells. The system includes the metal-air fuel cells comprising a plurality of stacks of metal-air fuel cell units. The plurality of stacks of metal-air fuel cell units are designed to be connected in at least one of a series configuration and a parallel configuration. Each metal-air fuel cell unit comprises at least one metal anode sheet placed between at least two cathodes sheets. One or more cathode electrodes (111) are held together with one of an epoxy and a silicone based elastomer adhesive. The at least one metal anode sheet and the at least two cathode sheets are included in a shell apparatus.
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公开(公告)号：US11083216B2
公开(公告)日：2021-08-10
申请号：US16097569
申请日：2017-04-27
发明人： Akshay Vivek Singhal , Purnendu
IPC分类号： A24D3/04 , A24D3/06 , A24D3/16 , C04B35/626 , C04B35/628 , C04B41/00 , C04B41/53 , C04B41/91 , A24F7/04 , C01B32/205 , C01B32/225 , A24D3/10 , B01D53/02 , C04B35/528 , C04B35/64
摘要： The embodiments herein provide a filter for cigarette comprising graphene nano-composite based material enclosed in a casing. The filter is reusable and is plugged to any cigarette, or tobacco smoking products. The filter is a stand-alone product or manufactured integrally with each individual cigarette. The filter provides a safe smoking option to tobacco smokers without changing their smoking habits by reducing the tar content and other toxic chemicals in the inhaled smoke. The graphene based nanocomposite filter adsorbs the toxic agents from the smoke (of cigarette, beedi, hookah etc). The filter is fabricated by treating ceramic particles and coating them with carbon particles. The carbon particles are carbonized. The ceramic particles coated with carbon are segregated based on shape and size and treated chemically to convert carbon into graphene under inert conditions. The graphene coated particles are chemically functionalized for improved filtration.
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公开(公告)号：US20230402618A1
公开(公告)日：2023-12-14
申请号：US18250976
申请日：2021-10-27
IPC分类号： H01M4/90
CPC分类号： H01M4/9041
摘要： The embodiment herein provides a simple, one-pot and scalable methodology for the synthesis of porous monoliths of Transition-metal-doped-noble-metal nanoparticles for cathode catalyst in a metal-air battery, PEMFCs, AFCs, and anode catalyst in water electrolysers. Silver is used as a base material on which doping is done with the transition metals selected from Cu, Co, Mn, Fe, and Ni.
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公开(公告)号：US20230163326A1
公开(公告)日：2023-05-25
申请号：US17921110
申请日：2021-04-22
IPC分类号： H01M8/0297 , H01M4/86 , H01M8/0273 , H01M8/0276 , H01M8/083
CPC分类号： H01M8/0297 , H01M4/86 , H01M8/0273 , H01M8/0276 , H01M8/083 , H01M2004/8684 , H01M2004/8689
摘要： The embodiments herein disclose a system (1000) for managing electrical connections with electrodes in a metal-air fuel cell. The system (1000) includes a cell frame (101) and one or more anode array (102). The one or more anode array (102) is detachably provided with the cell frame (101). The one or more anode array (102) comprises one or more anode. One or more air cathode (103) is provided with the cell frame (101). One or more connector (105) connects the one or more air cathode (103) and the one or more anode array (102). A snap mechanism (106) is used for locking and unlocking the one or more anode array (102) to the cell frame (101).
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公开(公告)号：US11760637B2
公开(公告)日：2023-09-19
申请号：US17322145
申请日：2019-11-15
发明人： Akshay Vivek Singhal , Anshul Kumar Sharma , Kunal Paul , Arvind Bhardwaj , Syed Shajar Ali Imam , Hemant Charaya
IPC分类号： C01B32/184 , C01B32/194
CPC分类号： C01B32/184 , C01B32/194 , C01P2006/10 , C01P2006/12 , C01P2006/40
摘要： The embodiments herein provide a facile four-step process for the preparation of binder-free graphene felts that are free standing and mechanically robust. The step of deagglomeration of graphene material leads to a uniform size distribution which when combined/integrated with an appropriate moulding technique allows an easy fine tuning of various attributes of graphene felts including electrical conductivity, porosity, surface area, surface morphology and surface functionalization depending on the desired application. Since graphene felts obtained from this process do not incorporate any binder, to achieve better electrical conductivity, electrochemical activity and catalytic and sensing properties compared to conventional graphene felts while not compromising with their mechanical properties.
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公开(公告)号：US20230212015A1
公开(公告)日：2023-07-06
申请号：US18088365
申请日：2022-12-23
IPC分类号： C01B32/186 , C09K11/65
CPC分类号： C01B32/186 , C09K11/65 , B82Y30/00
摘要： The embodiments herein provide a system and a method for the synthesis of Graphene Quantum Dots (GQDs) for use in applications like nano-electronics, photonics, bio-imaging, energy storage, quantum computing, etc. Cu substrate is placed inside the CVD tube, and the CVD Chamber is sealed. The process parameters for CVD process are set up. Precursor gases injected inside the tube are dissociated to form carbon dimers and trimmers. Upon cooling semi-crystalline carbon film deposits inside the CVD tube. Oxidizing gas mixture is injected to convert amorphous C in semi-crystalline carbon film to CO2/CO. Graphene Quantum Dots (GQDs) so formed are carried with the gas flow and deposited at the cooler end of tube. The scrapper assembly is inserted in the CVD Tube and the reagent is sprayed inside the tube to disperse these GQDs in the reagent. This dispersion is pumped out of the CVD Chamber.
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公开(公告)号：US20230406710A1
公开(公告)日：2023-12-21
申请号：US18339074
申请日：2023-06-21
IPC分类号： C01B32/225
CPC分类号： C01B32/225
摘要： The embodiments herein provide a low-cost, highly scalable, and automated system for the expansion of intercalated graphite compounds for the production of expanded graphite. The embodiments herein also provide an automated system (100) and method (200) for the synthesis and production of expanded graphite using a gas-based heating system. The system (100) comprises a housing (101) defining a production chamber (101a) having an open side (101b). A retractable tray (104) is movable into the production chamber through the open side, and the retractable tray comprises a holder (105) to hold a removable vessel (106) that contains a graphite intercalation compound. The housing (101) is provided with an opening (102) in a wall to removably receive a gas-based flame generation device (108) into the production chamber, and an exhaust outlet (103) to remove exhaust gases from the production chamber (101a).
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公开(公告)号：US20230382738A1
公开(公告)日：2023-11-30
申请号：US18232376
申请日：2023-08-10
发明人： AKSHAY VIVEK SINGHAL , ANSHUL KUMAR SHARMA , KUNAL PAUL , ARVIND BHARDWAJ , SYED SHAJAR ALI IMAM , HEMANT CHARAYA
IPC分类号： C01B32/184 , C01B32/194
CPC分类号： C01B32/184 , C01B32/194 , C01P2006/40 , C01P2006/12 , C01P2006/10
摘要： The embodiments herein provide a facile four-step process for the preparation of binder-free graphene felts that are free standing and mechanically robust. The step of deagglomeration of graphene material leads to a uniform size distribution which when combined/integrated with an appropriate moulding technique allows an easy fine tuning of various attributes of graphene felts including electrical conductivity, porosity, surface area, surface morphology and surface functionalization depending on the desired application. Since graphene felts obtained from this process do not incorporate any binder, to achieve better electrical conductivity, electrochemical activity and catalytic and sensing properties compared to conventional graphene felts while not compromising with their mechanical properties.
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公开(公告)号：US11560314B2
公开(公告)日：2023-01-24
申请号：US16959130
申请日：2018-12-27
摘要： The embodiments herein provide a system and a method for the synthesis of Graphene Quantum Dots (GQDs) for use in applications like nano-electronics, photonics, bio-imaging, energy storage, quantum computing, etc. Cu substrate is placed inside the CVD tube, and the CVD Chamber is sealed. The process parameters for CVD process are set up. Precursor gases injected inside the tube are dissociate to form carbon dimers and trimmers. Upon cooling semi-cyrstalline carbon film deposits inside the CVD tube. Oxidizing gas mixture is injected to convert amorphous C in semi-cyrstalline carbon film to CO2/CO. Graphene Quantum Dots (GQDs) so formed are carried with the gas flow and deposited at the cooler end of tube. The scrapper assembly is inserted in the CVD Tube and the reagent is sprayed inside the tube to disperse these GQDs in the reagent. This dispersion is pumped out of the CVD Chamber.
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