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AssigneeAsahi Glass Company, Limited
InventorsEiji Endoh, Shinji Terazono
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An electrolyte membrane which comprises a cation exchange membrane made of a polymer having cation exchange groups and contains cerium ions is used as an electrolyte membrane for a polymer electrolyte fuel cell. In a case where the cation exchange membrane has sulfonic acid groups, the sulfonic acid groups are ion-exchanged, for example, with cerium ions so that cerium ions are contained preferably in an amount of from 0.3 to 20% of —SO3− groups contained in the cation exchange membrane. A membrane for a polymer electrolyte fuel cell capable of power generation in high energy efficiency, having high power generation performance regardless of the dew point of the feed gas and capable of stable power generation over a long period of time, can be provided.
A polymer electrolyte fuel cell, which comprises an electrolyte membrane comprising a cation exchange membrane made of a polymer having sulfonic acid groups as cation exchange groups, characterized by containing cerium ions in an amount of from 0.3 to 20 mol % of the number of —SO3− groups contained in the cation exchange membrane.
A polymer electrolyte fuel cell, which comprises an electrolyte membrane comprising a cation exchange membrane made of a polymer having sulfonic acid groups as cation exchange groups, characterized in that some of the cation exchange groups are ion-exchanged with cerium ions in an amount of from 0.3 to 20 mol % of the number of —SO3− groups contained in the cation exchange membrane.
A polymer electrolyte fuel cell, which comprises an electrolyte membrane comprising a cation exchange membrane having at least two layers made of a polymer having sulfonic acid groups as cation exchange groups laminated, characterized in that at least one of the at least two layers contains cerium ions in an amount of from 0.3 to 20 mol % of the number of —SO3− groups contained in the cation exchange membrane.
A polymer electrolyte fuel cell, which comprises an electrolyte membrane comprising a cation exchange membrane having at least two layers made of a polymer having sulfonic acid groups as cation exchange groups laminated, characterized in that at least one of the at least two layers is a cation exchange membrane in which at least some of the cation exchange groups are ion-exchanged with cerium ions in an amount of from 0.3 to 20 mol % of the number of —SO3− groups contained in the cation exchange membrane.
Dependencies are inferred from the claim text.