METHOD FOR MANUFACTURING SLURRY FOR MICROPOROUS LAYER FORMATION AND GAS DIFFUSION LAYER INCLUDING MICROPOROUS LAYER MANUFACTURED THEREBY

    公开(公告)号:US20210234176A1

    公开(公告)日:2021-07-29

    申请号:US15734799

    申请日:2019-06-11

    Abstract: In the present invention, a water-based wetting dispersant having an acid value of 5 mg KOH/g or more and an amine value of 10 mg KOH/g or less is used to dilute and disperse black carbon and a hydrophobic fluorine resin in an organic solvent to manufacture a slurry for microporous layer formation. In this regard, the added amount of the water-based wetting dispersant is adjusted to 5 to 30 parts by weight on the basis of 100 parts by weight of black carbon. In the present invention, the slurry is applied to at least one surface of carbon fiber paper and dried to form a microporous layer in which two independent peaks appear as analyzed on a particle size graph, followed by compression and deposition thereof to fabricate a gas diffusion layer including the microporous layer in which two independent peaks appear as analyzed on a particle size graph. With the appearance of two independent peaks on a particle size analysis graph, the gas diffusion layer of the present invention has an excellent drainage function, thereby increasing in the current value of the concentration polarization curve at the equivalent voltage value.

    Polyimide cover substrate
    173.
    发明授权

    公开(公告)号:US11040522B2

    公开(公告)日:2021-06-22

    申请号:US14781829

    申请日:2014-03-31

    Abstract: Disclosed is a polyimide cover substrate, which is configured such that a device protection layer is formed of a urethane acrylate compound on at least one side of a polyimide film, thereby exhibiting not only high flexural properties and impact resistance but also superior solvent resistance, optical properties and scratch resistance and low water vapor transmission rate, and thus can be effectively utilized as a cover substrate for a flexible electronic device.

    HUMIDIFIER FOR FUEL CELL
    174.
    发明申请

    公开(公告)号:US20210050607A1

    公开(公告)日:2021-02-18

    申请号:US16928738

    申请日:2020-07-14

    Abstract: A humidifier for a fuel cell is provided and includes a housing having, at a first side, a moist air supply port through which moist air is supplied from a fuel cell stack and having, at a second side, a moist air discharge port. A humidifying membrane is disposed in the housing and allows dry air to flow along the inside of the humidifying membrane. A bypass flow path is formed in the housing to allow a part of the moist air supplied to the moist air supply port to continuously flow to the moist air discharge port without passing through the humidifying membrane, thereby adjusting the amount of humidification and a differential pressure of the humidifier based on an operating condition of a fuel cell.

    Membrane-electrode assembly, method for manufacturing same, and fuel cell comprising same

    公开(公告)号:US10923752B2

    公开(公告)日:2021-02-16

    申请号:US16341138

    申请日:2017-12-28

    Abstract: Disclosed are a membrane-electrode assembly, a method of manufacturing the same, and a fuel cell including the membrane-electrode assembly. The membrane-electrode assembly includes a catalyst layer, an interfacial adhesive layer which is positioned on the catalyst layer and formed by permeating an interface between the interfacial adhesive layer and the catalyst layer into a partial depth of the catalyst layer, and an ion exchange membrane which is positioned on the interfacial adhesive layer and bonded to the catalyst layer by the medium of the interfacial adhesive layer, the interfacial adhesive layer including a fluorine-based ionomer having an equivalent weight (EW) of 500 to 1000 g/eq.

    Hollow fiber membrane module
    179.
    发明授权

    公开(公告)号:US10668432B2

    公开(公告)日:2020-06-02

    申请号:US15737456

    申请日:2016-05-17

    Abstract: A hollow fiber membrane module includes a housing having an inlet formed one end thereof and an outlet formed on the other end thereof, in which hot and humid humidifying fluid flows in through the inlet and the humidifying fluid after humidifying a cool and dry fluid flowing out of the housing through the outlet; at least one hollow fiber membrane bundle which is inserted into the housing in the longitudinal direction; a partitioning part for supporting the hollow fiber membrane bundle and partitioning an inflow space, in which the humidifying fluid flowing into the housing momentarily remains, and an outflow space, in which the humidifying fluid momentarily remains before being discharged through the outlet; and a potting part for potting both ends of the hollow fiber membrane bundle to the housing.

    Polyamide-imide precursor, polyamide-imide film and display device comprising same

    公开(公告)号:US10662290B2

    公开(公告)日:2020-05-26

    申请号:US15540789

    申请日:2015-12-30

    Abstract: This invention relates to a polyamide-imide precursor, a polyamide-imide obtained by imidizing the same, a polyamide-imide film, and an image display device including the film. The polyamide-imide precursor includes, in a molecular structure thereof, a first block, obtained by copolymerizing monomers including dianhydride and diamine, and a second block, obtained by copolymerizing monomers including an aromatic dicarbonyl compound and aromatic diamine. The dianhydride includes biphenyltetracarboxylic acid dianhydride (BPDA) and 2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA), and the diamine includes bistrifluoromethylbenzidine (TFDB).

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