Partially quaternized styrene copolymer, ion conductivity-imparting agent, catalyst electrode layer, membrane-electrode assembly and production method thereof, gas diffusion electrode and production method thereof, and anion exchange membrane fuel cell

摘要

An ion conductivity-imparting agent used in a fuel cell using an anion exchange membrane, maintaining high ion conductivity and gas diffusibility, and minimizing swelling of an electrode catalyst layer in a post-crosslinking step. To provide an ion conductivity-imparting agent capable of forming a highly active catalyst electrode layer and obtaining an excellent fuel cell output. A structural unit having a quaternary base type anion exchange group, and a halogen A partially quaternized styrene polymer containing a certain amount of a structural unit having a functionalized alkyl group maintains high ionic conductivity and gas diffusibility, and also suppresses the swelling of the electrode catalyst layer in the post-crosslinking step. In addition, a highly active catalyst electrode layer can be formed, and an excellent fuel cell output can be obtained. [Selection figure] None