| abstract |
[assignment] As an ion conductivity imparting agent for use in a fuel cell using an anion exchange membrane, ion conductivity and gas diffusibility are maintained high, and swelling of the electrode catalyst layer is suppressed slightly in the post-crosslinking step, And to provide an ion conductivity imparting agent capable of obtaining an excellent fuel cell output. [Solution] The ionic conductivity and the gas diffusibility are maintained to be high by the partially quaternized styrenic copolymer containing the constituent unit having the quaternary base type anion exchanger and the constituent unit having the halogenated alkyl group in a certain amount, It is possible to form a highly active catalytic electrode layer in which the swelling of the catalyst layer is suppressed to a small extent, and an excellent fuel cell output can be obtained. |