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1.发明公开公开(公告)号：US20230191483A1
公开(公告)日：2023-06-22
申请号：US17996073
申请日：2021-04-16
Applicant: CellMobility, Inc.
Inventor： Gigap Han , Kicheol Hong , Heeman Choe
CPC classification number: B22F3/162 , B22F3/1134 , B22F2998/10 , B22F2301/205 , B22F2302/45 , B22F2003/247
Abstract: A sodium-chloride-space-holder process with two-step heat treatment is used to create an open-porous metal foam (e.g., titanium foam) with a high porosity of about 70 to 90 percent for use in load-bearing applications. A mechanically reliable titanium foam is manufactured using a space-holder method containing two-step heat treatment where a sodium chloride powder is first sieved for desired pore size range, mixed with titanium powder, and compacted under pressure at high temperature. An additional heat treatment is applied to further strengthen the chemical bonding between the titanium particles after the removal of sodium chloride in water to create pores. This process uses a pneumatic pressing machine in combination with a furnace under an argon gas to simultaneously apply both the pressure and temperature. The resulting titanium foam is chemically well bonded and has enhanced durability for proper used in structural applications.
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Patent Agency Ranking
公开(公告)号：US11919080B2
公开(公告)日：2024-03-05
申请号：US16979513
申请日：2019-03-11
Applicant: CellMobility, Inc.
Inventor： Kicheol Hong , Hyeji Park , Sukyung Lee , Youngseok Song , Gigap Han , Kyungju Nam , Heeman Choe
CPC classification number: B22F3/1143 , B22F3/001 , C22C9/06 , C22C19/002 , B22F3/10 , B22F2302/25 , C22C1/08
Abstract: The successful fabrication of alloy foam (or porous alloy) is very rare, despite their potentially better properties and wider applicability than pure metallic foams. The processing of three-dimensional copper-nickel alloy foams is achieved through a strategic solid-solution alloying method based on oxide powder reduction or sintering processes, or both. Solid-solution alloy foams with five different compositions are successfully created, resulting in open-pore structures with varied porosity. The corrosion resistance of the synthesized copper-nickel alloy foams is superior to those of the pure copper and nickel foams.
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公开(公告)号：US20220165510A1
公开(公告)日：2022-05-26
申请号：US17441156
申请日：2020-03-24
Applicant: CellMobility, Inc.
Inventor： Kicheol Hong , Gigap Han , Hyeji Park , Balamurugan Thirumalraj , Jin Soo Kang , Hyeseon Na , Youngseok Song , Heeman Choe
Abstract: A capacitor and supercapacitor design are based on metal-foam electrodes. An electrolytic capacitor has a metal foam dielectric (e.g., aluminum oxide, titanium oxide, iron oxide, or others). An electric double-layer supercapacitor has an electrode with metal foam (e.g., copper, nickel, titanium, iron, steel alloy, or aluminum) filled with activated carbon, or graphene, or metal foam with activated carbon foam, or any combination of these to enhance the electrical conductivity and thus the power and capacity of the cell. A pseudocapacitor device has an electrode with metal foam (e.g., iron, cobalt, nickel, copper, titanium, aluminum, magnesium, tin, manganese, and stainless steel, and their alloy foams) coated with an oxide- or hydroxide-based material containing highly active zones. The pseudocapacitor metal-foam electrode can also be filled with activated carbon in the form of a slurry to further enhance its capacity.
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公开(公告)号：US20210370392A1
公开(公告)日：2021-12-02
申请号：US16979513
申请日：2019-03-11
Applicant: CellMobility, Inc.
Inventor： Kicheol Hong , Hyeji Park , Sukyung Lee , Youngseok Song , Gigap Han , Kyungju Nam , Jeno Gubicza , Péter Jenei , Csilla Wiener , Heeman Choe
Abstract: The successful fabrication of alloy foam (or porous alloy) is very rare, despite their potentially better properties and wider applicability than pure metallic foams. The processing of three-dimensional copper-nickel alloy foams is achieved through a strategic solid-solution alloying method based on oxide powder reduction or sintering processes, or both. Solid-solution alloy foams with five different compositions are successfully created, resulting in open-pore structures with varied porosity. The corrosion resistance of the synthesized copper-nickel alloy foams is superior to those of the pure copper and nickel foams.
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公开(公告)号：US20210344017A1
公开(公告)日：2021-11-04
申请号：US17261553
申请日：2019-07-19
Applicant: CellMobility, Inc.
Inventor： Kicheol Hong , Hyeji Park , Youngseok Song , Kyungbae Kim , Heeman Choe
IPC: H01M4/80 , H01M4/505 , H01M4/66 , H01M4/525 , H01M4/1395 , B22F3/11 , H01M10/0525 , B22F3/26 , C22C1/08
Abstract: Anode and cathode electrodes of a rechargeable lithium-ion battery are manufactured using metal foam. This lithium-ion battery with the metal-foam electrodes can have pores coated or filled, or both, with high-capacity active materials for greater energy density, better safety, improved power, and longer cycle life. Aluminum (or nickel) and copper metal-foam electrodes are manufactured using space-holder and freeze-casting methods. An anode can be filled with a graphite or silicon slurry, or a combination. A cathode can be filled with a lithium cobalt oxide (or other higher-capacity active materials) slurry. The relatively thick metal-foam electrodes are attached to the cell, separated by a separator, and wetted by an electrolyte, forming a high-capacity secondary battery. The battery will have higher density, improved power, and good cycle life.
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公开(公告)号：US20210277503A1
公开(公告)日：2021-09-09
申请号：US17258136
申请日：2019-07-08
Applicant: CellMobility, Inc.
Inventor： Kicheol Hong , Hyeji Park , Teakyung Um , Heeman Choe
Abstract: Morphology, microstructure, compressive behavior, and biocorrosive properties of magnesium or magnesium alloy foams allow for their use in biodegradable biomedical, metal-air battery electrode, hydrogen storage, and lightweight transportation applications. Magnesium or Mg alloy foams are usually very difficult to manufacture due to the strong oxidation layer around the metallic particles; however, in this invention, they can be synthesized via a camphene-based freeze-casting process with the addition of graphite powder using precisely controlled heat-treatment parameters. The average porosity ranges from 45 to 85 percent and the median pore diameter is about a few tens to hundreds of microns, which are suitable for bio and energy applications utilizing their enhanced surface area. This invention based on powder-slurry freeze-casting method using camphene as a volatile solvent is also applicable for other metal foams such as iron, copper, or others to produce three-dimensional metal foams with high strut connectivity.
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