一种燃料电池用复合膜的制备工艺

    公开(公告)号:WO2022127253A1

    公开(公告)日:2022-06-23

    申请号:PCT/CN2021/119574

    申请日:2021-09-22

    Abstract: 本发明公开了一种燃料电池用复合膜的制备工艺,复合膜以膨胀体聚四氟乙烯微孔基膜为骨架,经过由低到高不同浓度混合液体的浸渍处理,具体为,处理池一中是浓度为0.1wt%-1wt%的全氟磺酸树脂液与保水剂和自由基淬灭剂的混合液,处理池二中是浓度为2wt%-6wt%的全氟磺酸树脂液与保水剂和自由基淬灭剂的混合液,处理池三中是浓度为7wt%-20wt%的全氟磺酸树脂液与磺化聚醚醚酮的混合液。通过本发明所述工艺制备的质子交换复合膜不会产生孔隙残留,避免使用过程中氢气渗透的发生,并且能够同时满足机械强度、尺寸稳定性以及优异电化学性能的需要。

    플라즈마 및 실란 처리를 통한 불소계 기반의 고분자 표면 친수처리 방법

    公开(公告)号:WO2023033619A1

    公开(公告)日:2023-03-09

    申请号:PCT/KR2022/013287

    申请日:2022-09-05

    Inventor: 김성곤 김현준

    Abstract: 본 발명은 불소계 기반의 고분자를 세척액에 담그어 세척한 다음 건조시키는 전처리 단계, 상기 건조된 불소계 기반의 고분자를 플라즈마 처리한 다음 대기중에 노출시켜 고분자 표면에 실란 커플링 반응을 일으킬 수 있는 작용기를 도입시키는 단계, 및 실란커플링제(silane coupling agent) 용액에 상기 불소계 기반의 고분자를 딥핑(dipping)한 후 건조시켜 실란커플링(silane coupling) 반응시키는 단계를 포함하는 불소계 기반의 고분자 표면의 개질 방법을 제공한다. 본 발명의 방법은 공정 시간이 매우 단축된 것이며 또한 간편하다는 장점이 있다. 본 발명에 의하면 친수처리된 불소계 기반의 고분자를 제공할 수 있으며, 그 내부에 전해질을 함침시킴으로써 강화복합막 형태의 전해질막으로서 수소연료전지에의 활용이 가능하다.

    METHOD FOR PREPARING A POLYMER MEMBRANE FOR A POLYMER ELECTROLYTE WATER ELECTROLYSER

    公开(公告)号:WO2020234085A1

    公开(公告)日:2020-11-26

    申请号:PCT/EP2020/063331

    申请日:2020-05-13

    Abstract: It is the objective of the present invention to provide a method for preparing a polymer membrane for a polymer electrolyte water electrolyserin order to achieve thin membranes with high crossover suppression and without showing a negative impact on the cell performance. This objective is achieved according to the present invention by a method to prepare an ionomer of an ion exchange membrane (anion or cation exchange) with a recombination catalyst to prevent gas crossover of species, such as hydrogen and/or oxygen,toanodic and cathodic cell compartments of an electrochemical cell; said method comprising the steps of: a) providing the ionomer as a proton or an anion exchange polymer; b) selecting the recombination catalyst from the precious metals group; c) providing the selected recombination catalyst in an ionic form being comprised in a liquid metal salt solution; d) immersing the ion exchange membrane into the liquid metal salt solution thereby exchanging at least a part of the ionic ionomer ports with the ionic form of the recombination catalyst; e) assembling the immersed ion exchange membrane in the electrochemical cell; and f) at least partially reducing the content of the ionic form of the recombination catalyst into the metallic form by forcing hydrogen to permeate through the ionomer of the ion exchange membrane. Therefore, the present invention presents a new reduction method for Pt-Ions by diffusing hydrogen through the PEM in a PEWE cell. The presented solution provides a way to achieve thin membranes with high crossover suppression, without a negative impact on the cell performance and a reduction in-situ on the flight.

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