公开(公告)号：US20210017347A1

公开(公告)日：2021-01-21

申请号：US17063058

申请日：2020-10-05

Applicant: AGC Inc.

Inventor： Shintaro HAYABE ,  Osamu HOMMA ,  Yasushi YAMAKI ,  Tatsuya MIYAJIMA ,  Takuo NISHIO

IPC: C08J5/22 ,  H01M8/1039

Abstract: To provide an ion exchange membrane which is excellent in dimensional stability in an in-plane direction when immersed in an electrolytic solution, and a method for producing a dry ion exchange membrane.
The ion exchange membrane according to the present invention is an ion exchange membrane containing a fluorinated polymer, wherein in a case where by Raman spectroscopy, polarized light orthogonal to the thickness direction of the ion exchange membrane is irradiated to obtain a spectrum chart, whereby the ratio of the peak area a2 of Raman shift 680 to 760 cm−1 to the peak area al of Raman shift 1,025 to 1,095 cm−1 is taken as A1, and by Raman spectroscopy, to a cross section in the thickness direction of the ion exchange membrane, polarized light parallel with the thickness direction is irradiated to obtain a spectrum chart, whereby the ratio of the peak area b2 of Raman shift 920 to 1,025 cm−1 to the peak area b1 of Raman shift 1,025 to 1,095 cm−1 is taken as B1, B1/A1 is at least 1.05.

公开(公告)号：US20210324528A1

公开(公告)日：2021-10-21

申请号：US17304971

申请日：2021-06-29

Applicant: AGC Inc.

Inventor： Kosuke SUMIKURA ,  Shintaro HAYABE ,  Takuo NISHIO

IPC: C25B9/23 ,  C25B1/04 ,  C25B13/08 ,  C25B11/054 ,  C25B11/075

Abstract: To provide a membrane electrode assembly which is excellent in strength and is capable of reducing the electrolysis voltage when applied to a water electrolysis apparatus, and such a water electrolysis apparatus.
The membrane electrode assembly of the present invention is a membrane electrode assembly for use in a water electrolysis apparatus, comprising an anode having a catalyst layer, a cathode having a catalyst layer, and a polymer electrolyte membrane disposed between the anode and the cathode, wherein the polymer electrolyte membrane comprises a fluorinated polymer having ion exchange groups, and a woven fabric, the aperture ratio of the woven fabric is at least 50%, the denier number of warp yarns and the denier number of weft yarns, constituting the woven fabric, are each independently at least 2, and a relationship of Y≤240X−170 is satisfied where the membrane thickness of the polymer electrolyte membrane is Y μm, and the ion exchange capacity of the fluorinated polymer is X meq/g dry resin.

公开(公告)号：US20190218675A1

公开(公告)日：2019-07-18

申请号：US16363403

申请日：2019-03-25

Applicant: AGC Inc.

Inventor： Yasushi YAMAKI ,  Kosuke SUMIKURA ,  Satoru MIYAMOTO ,  Hiromitsu KUSANO ,  Takuo NISHIO

IPC: C25B13/08 ,  C25B1/10 ,  C25B9/10 ,  C08J5/22

CPC classification number: C25B13/08 ,  C08J5/22 ,  C08J5/225 ,  C08J2327/16 ,  C25B1/10 ,  C25B9/00 ,  C25B9/10 ,  C25B13/04

Abstract: To provide a diaphragm for electrolyzing alkaline water and a device for electrolyzing alkaline water, whereby at the time of electrolyzing alkaline water, it is possible to suppress the electrolysis voltage to be low even at a high current density and interlayer peeling is unlikely to occur. This diaphragm 1 for electrolyzing alkaline water comprises an ion-exchange membrane 10 which contains a polymer having sulfonic acid functional groups and which does not contain a polymer having carbonic acid functional groups, and a hydrophilic layer provided as the outermost layer on at least one side of the diaphragm, wherein the thickness of the ion-exchange membrane 10 is from 25 to 250 μm. Or, the diaphragm 1 for electrolyzing alkaline water comprises an ion-exchange membrane 10, a reinforcing material 16 made of a woven fabric embedded in the ion-exchange membrane 10 and a hydrophilic layer provided as the outermost layer on at least one side of the diaphragm.

公开(公告)号：US20200266472A1

公开(公告)日：2020-08-20

申请号：US16865576

申请日：2020-05-04

Applicant: AGC Inc.

Inventor： Yasushi YAMAKI ,  Kosuke SUMIKURA ,  Tatsuya MIYAJIMA ,  Takuo NISHIO

IPC: H01M8/1039 ,  H01M8/18 ,  H01M8/1023 ,  C08J5/22

Abstract: The present invention provides an ion exchange membrane can improve the current efficiency of a redox flow battery without a drop in voltage efficiency, when used in the redox flow battery. The ion exchange membrane of the present invention is an ion exchange membrane comprising a fluorinated polymer having sulfonic acid functional groups, wherein the difference (D−Dc) between the distance D between ionic clusters and the diameter Dc of ionic clusters as measured by the small angle X-ray scattering is 0.60 nm or more, and the ion exchange capacity of the fluorinated polymer is 0.95 meq/gram dry resin or more.

公开(公告)号：US20190040537A1

公开(公告)日：2019-02-07

申请号：US16156320

申请日：2018-10-10

Applicant: AGC Inc.

Inventor： Yasushi YAMAKI ,  Takayuki KANEKO ,  Hiromitsu KUSANO ,  Takuo NISHIO

IPC: C25B13/08 ,  C25B1/46 ,  C25B9/10 ,  B01J39/05 ,  B01J39/20 ,  B01J47/12

Abstract: To provide an ion exchange membrane for alkali chloride electrolysis whereby it is possible to make the electrolysis voltage low and the current efficiency high at the time of performing electrolysis of an alkali chloride; a method for its production; and an alkali chloride electrolysis apparatus using it. The ion exchange membrane for alkali chloride electrolysis has a layer (C) comprising a fluorinated polymer having carbonic acid functional groups, and a layer (S) comprising a fluorinated polymer having sulfonic acid functional groups; a reinforcing material containing reinforcing threads is disposed in the layer (S); and when measured after the ion exchange membrane for alkali chloride electrolysis is immersed and held in a 32 mass % sodium hydroxide aqueous solution warmed at 90° C. for 16 hours and subsequently immersed in a 32 mass % sodium hydroxide aqueous solution at 25° C. for 3 hours, the AC resistance value A of the layer (S) and the AC resistance value B of the layer (C) satisfy the following formulae at the same time: 1(Ω·cm2)≤A≤10(Ω·cm2) and 200(Ω·cm2)≤B≤450(Ω·cm2).

公开(公告)号：US20230193483A1

公开(公告)日：2023-06-22

申请号：US18108763

申请日：2023-02-13

Applicant: AGC INC.

Inventor： Shintaro HAYABE ,  Kosuke SUMIKURA ,  Takuo NISHIO

IPC: C25B9/19 ,  C25B1/04 ,  C25B13/02 ,  C25B13/08

CPC classification number: C25B9/19 ,  C25B1/04 ,  C25B13/02 ,  C25B13/08

Abstract: To provide a membrane electrode assembly, a solid polymer electrolyte membrane, a water electrolysis apparatus, and an electrolytic hydrogenation apparatus, that can reduce the range of increase in electrolysis voltage even when the current density increases when applied to a water electrolysis apparatus or an electrolytic hydrogenation apparatus. The membrane electrode assembly of the present invention comprises an anode having a catalyst layer, a cathode having a catalyst layer, and a solid polymer electrolyte membrane disposed between the anode and the cathode, wherein the solid polymer electrolyte membrane comprises a fluorinated polymer having ion-exchange groups and a woven fabric, wherein the aperture ratio of the woven fabric is at least 50%, and the ratio TAAVE/TBAVE calculated from the average maximum membrane thickness TAAVE and the average minimum membrane thickness TBAVE of the solid polymer electrolyte membrane is at least 1.20.

公开(公告)号：US20220396890A1

公开(公告)日：2022-12-15

申请号：US17878275

申请日：2022-08-01

Applicant: AGC INC.

Inventor： Kosuke SUMIKURA ,  Shintaro HAYABE ,  Takuo NISHIO

IPC: C25B13/08 ,  C25B3/01 ,  C25B13/05 ,  C25B11/053 ,  B01J47/12 ,  C25B9/19 ,  C25B3/25 ,  B01J35/00 ,  B01J35/06 ,  B01J35/10

Abstract: To provide an ion exchange membrane with a catalyst layer, an ion exchange membrane and an electrolytic hydrogenation apparatus, which can lower electrolysis voltage and increase current efficiency at the time of electrolytic hydrogenation of an aromatic compound.
The ion exchange membrane with a catalyst layer of the present invention has an inorganic particle layer containing inorganic particles and a binder, a layer (Sa) containing a first fluorinated polymer having sulfonic acid type functional groups, and a layer (Sb) containing a second fluorinated polymer having sulfonic acid type functional groups, and a catalyst layer, in this order, wherein the ion exchange capacity of the above first fluorinated polymer is lower than the ion exchange capacity of the above second fluorinated polymer.

公开(公告)号：US20210234182A1

公开(公告)日：2021-07-29

申请号：US17229945

申请日：2021-04-14

Applicant: AGC Inc.

Inventor： Kosuke SUMIKURA ,  Shintaro HAYABE ,  Tatsuya MIYAJIMA ,  Takuo NISHIO

IPC: H01M8/1039 ,  H01M8/18 ,  H01M8/1023 ,  H01M8/1067 ,  C08J5/22

Abstract: To provide an ion-exchange membrane that, when being used in a redox flow battery, provides excellent current efficiency and can suppress reduction in voltage efficiency. The ion-exchange membrane contains a fluorinated polymer having sulfonic acid-type functional groups and is characterized in that the difference (D−Dc) between the distance D between ion clusters measured by the small angle X-ray scattering method, and the diameter Dc of an ion cluster is larger than 0 and at most 0.50 nm.