Polymer electrolyte for fuel cell
AssigneeSumitomo Chemical Company, Limited
InventorsKatsuhiko Iwasaki, Taketsugu Yamamoto, Hiroshi Harada, Atsushi Terahara, Kunihisa Satoh
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Abstract
Provided is a polymer electrolyte which is cheap and easily synthesized, and has a high water resistance and high output performance. The polymer electrolyte comprising a sulfonated polymer having an ion-exchange group equivalent weight of 500 to 2500 g/mol, which is obtainable by sulfonating a structural unit represented by the structural formula (II) of a copolymer having 95 to 40 mol % of a structural unit represented by the following structural formula (I) and 5 to 60 mol % of a structural unit represented by the following structural formula (II), ##STR1##
Claims7
A polymer electrolyte for a fuel cell, comprising:
- a sulfonated polymer having an ion-exchange group equivalent weight of 500 to 2500 g/mol, which is obtainable by sulfonating a structural unit represented by the structural formula (II) of a copolymer having 95 to 40 mol % of a structural unit represented by the following structural formula (I) and 5 to 60 mol % of a structural unit represented by the following structural formula (II), ##STR6## wherein Ar represents at least one of the following structures, ##STR7## .
A polymer electrolyte membrane for a fuel cell, wherein the membrane comprises a polymer electrolyte for fuel cell, comprising:
- a sulfonated polymer having an ion-exchange group equivalent weight of 500 to 2500 g/mol, which is obtainable by sulfonating a structural unit represented by the structural formula (II) of a copolymer having 95 to 40 mol % of a structural unit represented by the following structural formula (I) and 5 to 60 mol % of a structural unit represented by the following structural formula (II), ##STR9## wherein Ar represents at least one of the following structures, ##STR10## .
A method for producing a polymer electrolyte membrane for a fuel cell, which comprises:
- forming a membrane of a polymer electrolyte for the fuel cell, comprising:
- a sulfonated polymer having an ion-exchange group equivalent weight of 500 to 2500 g/mol, which is obtainable by sulfonating a structural unit represented by the structural formula (II) of a copolymer having 95 to 40 mol % of a structural unit represented by the following structural formula (I) and 5 to 60 mol % of a structural unit represented by the following structural formula (II), ##STR11## wherein Ar represents at least one of the following structures, ##STR12## by a solution casting method, a melt pressing method or a melt extrusion method.
A fuel cell comprising a polymer electrolyte, comprising:
- a sulfonated polymer having an ion-exchange group equivalent weight of 500 to 2500 g/mol, which is obtainable by sulfonating a structural unit represented by the structural formula (II) of a copolymer having 95 to 40 mol % of a structural unit represented by the following structural formula (I) and 5 to 60 mol % of a structural unit represented by the following structural formula (II), ##STR13## wherein Ar represents at least one of the following structures, ##STR14## .
Dependencies are inferred from the claim text.