| abstract |
The present invention relates to a new polymer compound in which a sulfonic acid group is introduced, a cation exchange membrane filler and a cation exchange membrane containing the polymer compound. In particular, a polymer having a large amount of sulfonic acid groups and having a thiol group at the terminal is reacted with a functional group present in graphene oxide to prepare a filler, and it is compounded with a base polymer of a cation exchange membrane to improve performance. By using the polymer compound of the present invention and a cation exchange membrane filler containing the same, a cation exchange membrane having improved performances such as cation conductivity, mechanical properties, oxidation stability, and dimensional stability can be obtained. Further, the present invention relates to a membrane electrode assembly and a fuel cell including the cation exchange membrane. |