公开(公告)号：US11840589B2

公开(公告)日：2023-12-12

申请号：US17331912

申请日：2021-05-27

申请人： AGC Inc.

发明人： Takeshi Hirai ,  Daisuke Jomuta ,  Chikaya Tamitsuji

IPC分类号： C08F214/26 ,  C08F216/14 ,  C25B9/23 ,  C25B1/04 ,  C25B13/08 ,  H01M8/1004 ,  H01M8/1023 ,  H01M8/1067 ,  H01B1/12 ,  H01M8/1039 ,  H01M8/1058 ,  H01M8/10

CPC分类号： C08F214/262 ,  C08F216/1475 ,  C25B1/04 ,  C25B9/23 ,  C25B13/08 ,  H01B1/12 ,  H01M8/1004 ,  H01M8/1023 ,  H01M8/1039 ,  H01M8/1058 ,  H01M8/1067 ,  H01M2008/1095

摘要： 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.

公开(公告)号：US12018106B2

公开(公告)日：2024-06-25

申请号：US17725459

申请日：2022-04-20

申请人： AGC INC.

发明人： Takeshi Hirai ,  Susumu Saito ,  Hiroyuki Watabe

IPC分类号： H01M8/1004 ,  C08F216/14 ,  C08K3/04 ,  C08K3/08 ,  C08K3/22 ,  H01M8/1039 ,  H01M8/1072 ,  H01M8/10

CPC分类号： C08F216/1475 ,  C08K3/04 ,  C08K3/08 ,  C08K3/22 ,  H01M8/1004 ,  H01M8/1039 ,  H01M8/1072 ,  C08K2003/2244 ,  H01M2008/1095

摘要： The present invention provides a fluoropolymer containing fluorosulfonyl groups capable of forming a polymer electrolyte membrane with high conductivity and hot water resistance, a method for its production, a fluoropolymer containing acid-form sulfonic acid groups and a method for its production, a polymer electrolyte membrane, a membrane-electrode assembly and a polymer electrolyte fuel cell. The method for producing a fluoropolymer containing fluorosulfonyl groups of the present invention comprises copolymerizing a monomer m1 (CF2═CFCF2O-Q1-SO2F) and TFE in a reactor at a temperature of from 150 to 200° C. in the presence of a radical polymerization initiator, wherein the radical polymerization initiator is continuously or sequentially added into the reactor so that the concentration of the radical polymerization initiator is kept to at most 2.5 mass ppm of the initial feed of the monomer m1 present in the reactor before initiation of the copolymerization during the copolymerization, and the molar ratio of the total feed of the monomer m1 to the total feed of tetrafluoroethylene is from 1.5 to 20.

公开(公告)号：US11996595B2

公开(公告)日：2024-05-28

申请号：US17407231

申请日：2021-08-20

申请人： AGC Inc.

发明人： Takumi Okuyama ,  Takeshi Hirai

IPC分类号： H01M8/1039 ,  C08F216/14 ,  H01M8/1004 ,  H01M8/1023 ,  H01M8/10

CPC分类号： H01M8/1039 ,  C08F216/1475 ,  H01M8/1004 ,  H01M8/1023 ,  C08F2800/20 ,  H01M2008/1095 ,  H01M2300/0082

摘要： To provide a polymer electrolyte membrane capable of producing a polymer electrolyte fuel cell excellent in power generation characteristics and excellent in hydrogen gas utilization efficiency, as well as a membrane electrode assembly and a polymer electrolyte fuel cell obtainable by using it.
The polymer electrolyte membrane of the present invention comprises a polymer electrolyte, 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 2.4×10−9 cm3·cm/(s·cm2·cmHg) and has a membrane thickness of from 7 to 20 μm.