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：US20200259196A1

公开(公告)日：2020-08-13

申请号：US16861271

申请日：2020-04-29

Applicant: AGC Inc.

Inventor： Yasushi YAMAKI ,  Kosuke Sumikura ,  Takuo Nishio ,  Takumi Okuyama ,  Satoru Hommura

IPC: H01M8/1039 ,  C02F1/461

Abstract: The present invention provides a strong polymer electrolyte membrane which can provide a water electrolyzer operable at low electrolysis voltage. The polymer electrolyte membrane of the present invention comprises a fluorinated polymer and a woven fabric, wherein the weight of the woven fabric is from 20 to 95 g/m2, and the warp and weft of the woven fabric independently have a denier of from 30 to 100.

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：US20210245148A1

公开(公告)日：2021-08-12

申请号：US17242848

申请日：2021-04-28

Applicant: AGC, Inc.

Inventor： Yasushi YAMAKI ,  Hiromitsu KUSANO

IPC: B01J39/05 ,  B01J39/20 ,  B01J47/12 ,  C08L27/12 ,  C08J5/22

Abstract: The present invention provides composite particles which are capable of forming an ion exchange membrane with fewer defects and an ion exchange membrane. The composite particles according to the present invention comprise pellets comprising a fluorinated polymer having groups convertible to ion exchange groups, and a powder held on the pellet surface which comprises a polymer, wherein the powder has an average particle diameter of at least 1 μm and at most 1,000 μm, and the ratio of the average particle diameter of the pellets to the average particle diameter of the powder is 2 to 4,500.

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).