公开(公告)号：US20210301119A1

公开(公告)日：2021-09-30

申请号：US17333905

申请日：2021-05-28

Applicant: AGC Inc.

Inventor： Takeshi HIRAI ,  Daisuke JOMUTA ,  Chikaya TAMITSUJI

IPC: C08L27/18 ,  H01M8/1004 ,  H01M50/426 ,  H01M4/86

Abstract: To provide a perfluoropolymer capable of producing an electrolyte membrane excellent in electrical conductivity and mechanical strength under high temperature environment, as well as a liquid composition, a polymer electrolyte membrane, a membrane electrode assembly and a polymer electrolyte fuel cell, obtainable by using the perfluoropolymer. The perfluoropolymer of the present invention contains perfluoromonomer units, does not substantially contain units having a halogen atom other than a fluorine atom, does not substantially contain units having a ring structure, and has acid-type sulfonic acid groups, wherein the perfluoromonomer units contain at least one type of units A selected from the group consisting of perfluoro vinyl ether units and perfluoro allyl ether units; the ion exchange capacity is from 1.4 to 2.5 milliequivalent/gram dry resin; and the storage modulus at 120° C. is at least 60 MPa.

公开(公告)号：US20210332171A1

公开(公告)日：2021-10-28

申请号：US17351717

申请日：2021-06-18

Applicant: AGC Inc.

Inventor： Takeshi HIRAI ,  Daisuke JOMUTA ,  Chikaya TAMITSUJI ,  Takumi OKUYAMA

IPC: C08F214/26 ,  C08J5/22 ,  C08J5/18 ,  C08J5/24 ,  H01M8/1004 ,  B29C48/00

Abstract: To provide a polymer wherein a linking group that connects the main chain of the polymer and a cyclic perfluoroaliphatic disulfonimide skeleton, is a fluoroalkylene group which may have an ether oxygen atom. A polymer which has either one or both of units represented by formula u1-1 and units represented by formula u1-2: RF1, RF2: a C1-3 perfluoroalkylene group; RF3: a C1-6 perfluoroalkylene group; m: 0 or 1; and X: a hydrogen atom, an alkali metal atom, a fluorine atom, an alkyl group, ammonium or the like.

公开(公告)号：US20210301044A1

公开(公告)日：2021-09-30

申请号：US17330788

申请日：2021-05-26

Applicant: AGC Inc.

Inventor： Takeshi HIRAI ,  Susumu SAITO ,  Hiroyuki WATABE ,  Chikaya TAMITSUJI ,  Daisuke JOMUTA

IPC: C08F16/30 ,  C08J5/22 ,  B01J39/20 ,  B01J39/05 ,  H01M8/1039 ,  H01M8/1067 ,  H01M8/1023 ,  H01M8/1004 ,  C25B1/04 ,  C25B13/08

Abstract: To provide an acid-type sulfonic acid group-containing polymer which is excellent in hydrogen gas barrier properties and hot water resistance and which generates less oligomer during production; a liquid composition and a polymer electrolyte membrane comprising this acid-type sulfonic acid group-containing polymer; and a membrane electrode assembly and a polymer electrolyte fuel cell provided with the polymer electrolyte membrane.
This acid-type sulfonic acid group-containing polymer is a polymer which has perfluoromonomer units, no monomer units having a halogen atom other than a fluorine atom, and acid-type sulfonic acid groups, and of which the hydrogen gas permeability coefficient under the conditions of a temperature of 80° C. and a relative humidity of 10%, is at most 2.5×10−9 cm3·cm/(s·cm2·cmHg), and the mass reduction rate when being immersed in hot water at 120° C. for 24 hours is at most 15 mass %, wherein the TQ value of a polymer having fluorosulfonyl groups which is a precursor of the polymer having acid-type sulfonic acid groups, is at least 220° C.

公开(公告)号：US20210284813A1

公开(公告)日：2021-09-16

申请号：US17332145

申请日：2021-05-27

Applicant: AGC Inc.

Inventor： Takumi OKUYAMA ,  Takeshi HIRAI ,  Susumu SAITO ,  Chikaya TAMITSUJI ,  Daisuke JOMUTA

IPC: C08J5/22 ,  H01M8/1039 ,  H01M8/1004 ,  H01M8/1051 ,  C08L29/10

Abstract: To provide a liquid composition capable of forming a membrane excellent in durability against hydrogen peroxide or peroxide radicals and excellent in hydrogen gas barrier property; a polymer electrolyte membrane; a membrane electrode assembly; and a polymer electrolyte fuel cell.
Liquid composition comprising a liquid medium, an acid-type sulfonic acid group-containing fluorocarbon polymer of which the hydrogen gas permeation coefficient under the conditions of a temperature of 80° C. and a relative humidity of 10% is at most 2.5×10−9 cm3·cm/(s·cm2·cmHg), and cerium atoms; a polymer electrolyte membrane 15 comprising the acid-type sulfonic acid group-containing fluorocarbon polymer, and cerium atoms; and a membrane electrode assembly 10 comprising an anode 13 having a catalyst layer, a cathode 14 having a catalyst layer, and the polymer electrolyte membrane 15 disposed between the anode 13 and the cathode 14.

公开(公告)号：US20210284771A1

公开(公告)日：2021-09-16

申请号：US17331912

申请日：2021-05-27

Applicant: AGC Inc.

Inventor： Takeshi HIRAI ,  Daisuke JOMUTA ,  Chikaya TAMITSUJI

IPC: C08F214/26 ,  C25B1/04 ,  C25B9/23 ,  C25B13/08 ,  H01M8/1004 ,  H01M8/1039 ,  H01M8/1023 ,  H01M8/1058 ,  H01M8/1067 ,  C08F216/14 ,  H01B1/12

Abstract: To provide a perfluoropolymer capable of producing an electrolyte membrane excellent in mechanical strength in high temperature environments; as well as a liquid composition, polymer electrolyte membrane, membrane electrode assembly and polymer electrolyte water electrolyzer, obtainable by using the perfluoropolymer.
The perfluoropolymer of the present invention contains perfluoromonomer units, does not substantially contain units having a halogen atom other than a fluorine atom, does not substantially contain units having a ring structure, and has acid-type sulfonic acid groups, wherein the perfluoromonomer units contain at least one type of units A selected from the group consisting of perfluorovinyl ether units and perfluoroallyl ether units; the ion exchange capacity is from 0.9 to 1.4 milliequivalent/gram dry resin; and the storage modulus at 120° C. is at least 100 MPa.