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    Gas Sensor Device Based on Metal Oxide Foam
    2.
    发明申请
    Gas Sensor Device Based on Metal Oxide Foam 有权

    公开(公告)号：US20220155247A1

    公开(公告)日：2022-05-19

    申请号：US17441198

    申请日：2020-03-26

    Applicant: CellMobility, Inc.

    Inventor： Hyeji Park ,  Hee Chul Lee ,  Gigap Han ,  Heeman Choe

    IPC: G01N27/12 ,  C01G19/02 ,  G01N27/407

    Abstract: A gas sensing device is manufactured with three dimensionally connected metal oxide foam structure of large surface area and elongated channel pores within the three-dimensional porous structure for gas sensing applications, thereby increasing the surface area of the sensing layer and expediting sensitivity and sensor response. A gas sensor device includes the fabricated metal-oxide-foam sensing material attached via silver paste to platinum electrodes and ruthenium heater that are printed on low temperature co-fired ceramic substrate. This device will provide improved gas sensing performance with improved sensitivity and response time. Gas sensors including the metal oxide foam sensing material exhibit higher sensitivity to toxic gases such as ethanol and carbon monoxide due to the large surface area achieved from the porous three-dimensional structure providing increased chemical reaction sites and the larger porous channels allowing gases to easily pass, shortening the gas diffusion reaction path.

    Fabrication of Three-Dimensional Porous Electrode
    3.
    发明申请
    Fabrication of Three-Dimensional Porous Electrode 有权

    公开(公告)号：US20210178471A1

    公开(公告)日：2021-06-17

    申请号：US17165832

    申请日：2021-02-02

    Applicant: CellMobility, Inc.

    Inventor： Hyeji Park ,  Hyelim Choi ,  Heeman Choe

    IPC: B22F3/10 ,  B22F3/11 ,  B22D15/00 ,  B22D21/00 ,  B22D25/00 ,  B22F3/24 ,  B22F5/10

    Abstract: An electrode for the use of an advanced lithium battery is fabricated using three-dimensionally structured metal foam coated with an active material. The metal foam is porous metal foam that can be used as an anode current collector of a lithium-ion battery and is coated with an anode active material, such as tin, through a sonication-assisted electroless plating method. Additionally, the coated metal foam is heat-treated at an appropriate temperature in order to improve the integrity of the coating layer and hence, the cyclic performance of the lithium-ion battery.

    Method of Making Copper Foam Ball
    6.
    发明申请
    Method of Making Copper Foam Ball 有权

    公开(公告)号：US20220389962A1

    公开(公告)日：2022-12-08

    申请号：US17755922

    申请日：2020-11-12

    Applicant: CellMobility, Inc.

    Inventor： Hyeji Park ,  Heeman Choe

    IPC: F16C33/32 ,  C22C9/06 ,  B22F3/00 ,  B22F3/11 ,  B22F3/22 ,  F16C33/66 ,  C23C18/16 ,  C23C18/31

    Abstract: A metal foam ball, several millimeters in diameter, is manufactured to have an open-pore structure to absorb fluid (e.g., gas and liquid) such as water or lubricant. As an example, a copper foam ball is manufactured via a freeze casting method using prepared oxide powder slurry where a spherical silica gel mold is used to freeze the slurry, which is subsequently dried at low temperature in vacuum and then sintered at high temperature. For improved oxidation, copper alloy foam ball or copper foam ball coated with tin can also be manufactured through the same method. For improved strength, steel, copper-nickel alloy, or titanium foam ball can also be manufactured through the same method.

    Metal Foam Capacitors and Supercapacitors
    7.
    发明申请
    Metal Foam Capacitors and Supercapacitors 有权

    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

    IPC: H01G11/36 ,  H01G11/86 ,  H01G11/46 ,  H01G11/24

    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.

    Copper Foam for Water Purification
    8.
    发明申请
    Copper Foam for Water Purification 审中-公开

    公开(公告)号：US20200369538A1

    公开(公告)日：2020-11-26

    申请号：US16880941

    申请日：2020-05-21

    Applicant: CellMobility, Inc.

    Inventor： Hyeji Park ,  Junhyeong Park ,  Kendrick Hanjun Rhee ,  Heeman Choe

    IPC: C02F1/50 ,  B01D39/20 ,  C02F1/00

    Abstract: A metal foam, such as copper metal foam, is used for water filtration and purification. A method is used to manufacture a new water purification device with the capability of killing bacteria and viruses using three dimensionally connected copper foam filter consisting of random or elongated channel pores and large surface area, thereby increasing the copper surface area in contact with contaminated water drops and purifying them. The copper foam water filter has pores on the order of several to tens of micrometers and porosity ranging from 50 percent to 75 percent to properly control the water filtration time and the contact time between the copper foam pore surface and water drops during filtration.

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