Multilayered ion exchange membranes

    公开(公告)号:US12145141B2

    公开(公告)日:2024-11-19

    申请号:US18228624

    申请日:2023-07-31

    Abstract: An ion exchange membrane has multiple layers of ionic polymers which each contain substantially different chemical compositions. i.e. varying side chain lengths, varying backbone chemistries or varying ionic functionality. Utilizing completely different chemistries has utility in many applications such as fuel cells where for example, one layer can help reduce fuel crossover through the membrane. Or one layer can impart substantial hydrophobicity to the electrode formulation. Or one layer can selectively diffuse a reactant while excluding others. Also, one chemistry may allow for impartation of significant mechanical properties or chemical resistance to another more ionically conductive ionomer. The ion exchange membrane may include at least two layers with substantially different chemical properties.

    Advanced metal hydride heat transfer system utilizing an electrochemical hydrogen compressor

    公开(公告)号:US12129837B2

    公开(公告)日:2024-10-29

    申请号:US17687871

    申请日:2022-03-07

    CPC classification number: F03G7/012 B01D53/261

    Abstract: An electrochemical heat transfer device for a hot water tank utilizes an electrochemical hydrogen compressor to pump hydrogen into and out of a tank having a metal hydride forming alloy therein. The absorption of hydrogen by the metal hydride forming alloy is exothermic, produces heat, and the desorption of the hydrogen from the metal hydride forming alloy is endothermic and draws heat in. An electrochemical hydrogen compressor may be configured between to tanks and pump hydrogen back and forth to form a heat transfer device, such as a hot water heater. A heat transfer device may be coupled with the tank or may comprise the outer surface of the tank to transfer heat to an object or to the surroundings. A closed loop may be configured having two tanks and one or two electrochemical hydrogen compressors to pump the hydrogen in a loop around the system.

    MULTILAYERED ION EXCHANGE MEMBRANES
    3.
    发明公开

    公开(公告)号:US20230372924A1

    公开(公告)日:2023-11-23

    申请号:US18228624

    申请日:2023-07-31

    CPC classification number: B01J47/12 C08J5/2225 B01D2325/42

    Abstract: An ion exchange membrane has multiple layers of ionic polymers which each contain substantially different chemical compositions. i.e. varying side chain lengths, varying backbone chemistries or varying ionic functionality. Utilizing completely different chemistries has utility in many applications such as fuel cells where for example, one layer can help reduce fuel crossover through the membrane. Or one layer can impart substantial hydrophobicity to the electrode formulation. Or one layer can selectively diffuse a reactant while excluding others. Also, one chemistry may allow for impartation of significant mechanical properties or chemical resistance to another more ionically conductive ionomer. The ion exchange membrane may include at least two layers with substantially different chemical properties.

    ION EXCHANGE POLYMERS AND ION EXCHANGE MEMBRANES INCORPORATING SAME

    公开(公告)号:US20240165602A1

    公开(公告)日:2024-05-23

    申请号:US18520324

    申请日:2023-11-27

    CPC classification number: B01J39/18 B01J47/12

    Abstract: An ion exchange membrane is provided which includes an ion exchange polymer that is partially cross-linked. The partially cross-linked ion exchange polymer will be more stable and will not be washed out over time. The ion exchange polymer may be UV or chemically cross-linked, wherein a cross-linking compound is added to the ion exchange polymer either before or after coupling to a support material. A support material may be made of, or be coated with, a cross-linking compound and the support material may initiate cross-linking proximal to the support material. The support material may be made of a material that chemically bonds with the ionomer.

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