US 12,444,765 B2
Catalyst layer, catalyst layer ink and membrane-electrode assembly
Masako Kawamoto, Tokyo (JP); and Satoru Hommura, Tokyo (JP)
Assigned to AGC INC., Tokyo (JP)
Filed by AGC INC., Tokyo (JP)
Filed on Jun. 27, 2022, as Appl. No. 17/849,795.
Application 17/849,795 is a continuation of application No. PCT/JP2020/048482, filed on Dec. 24, 2020.
Claims priority of application No. 2019-237794 (JP), filed on Dec. 27, 2019.
Prior Publication US 2022/0367896 A1, Nov. 17, 2022
Int. Cl. H01M 8/1025 (2016.01); H01M 4/96 (2006.01); H01M 8/1004 (2016.01)
CPC H01M 8/1025 (2013.01) [H01M 4/96 (2013.01); H01M 8/1004 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A catalyst layer comprising a carbon alloy catalyst and an ion exchange polymer which comprises at least one species of units having a cyclic ether structure selected from the group consisting of units represented by the formula (u11), units represented by the formula (u12), units represented by the formula (u21), units represented by the formula (u22) and units represented by the formula (u24):

OG Complex Work Unit Chemistry
wherein in the formula (u11), R11 is a bivalent perfluoro organic group which may have an ethereal oxygen atom, each of R12, R13, R15 and R16 is independently a monovalent perfluoro organic group which may have an ethereal oxygen atom or a fluorine atom, and R14 is a monovalent perfluoro organic group which may have an ethereal oxygen atom, a fluorine atom or a group represented by —R11(SO2X(SO2Rf)a)−M+ wherein M+ is H+, a monovalent metal cation or an ammonium ion which may have at least one hydrocarbon group instead of a hydrogen atom, Rf is a linear or branched perfluoroalkyl group which may have an ethereal oxygen atom, X is an oxygen atom, a nitrogen atom or a carbon atom, and a is 0 when X is an oxygen atom, a is 1 when X is a nitrogen atom, and a is 2 when X is a carbon atom,
in the formula (u12), R21 is a C1-6 perfluoroalkylene group or a C2-6 perfluoroalkylene group which has an ethereal oxygen atom between carbon atoms, R22 is a fluorine atom, a C1-6 perfluoroalkyl group, a C2-6 perfluoroalkyl group which has an ethereal oxygen atom between carbon atoms or a group represented by —R21(SO2X(SO2Rf)a)−M+ wherein M+, Rf, X and a are the same as defined above,
in the formula (u21), each of R41, R42, R43, R44, R45 and R46 is independently a monovalent perfluoro organic group which may have an ethereal oxygen atom or a fluorine atom,
in the formula (u22), s is 0 or 1, each of R51 and R52 is independently a fluorine atom, a C1-5 perfluoroalkyl group or may form a spiro ring together with each other (when s is 0), each of R53 and R54 is independently a fluorine atom or a C1-5 perfluoroalkyl group, and R55 is a fluorine atom, a C1-5 perfluoroalkyl group or a C1-5 perfluoroalkoxy group, and
in the formula (u24), each of R71, R72, R73, R74, R75 and R76 is independently a monovalent perfluoro organic group which may have an ethereal oxygen atom or a fluorine atom.