Partially Quaternized Styrene-Based Copolymer, Ionic-Conductivity Imparter, Catalytic Electrode Layer, Membrane/Electrode Assembly and Process for Producing Same, Gas Diffusion Electrode and Process for Producing Same, and Fuel Cell of Anion Exchange Membrane Type

摘要

A partially quaternized styrene-based polymer contains given amounts of a constituent unit having a quaternary salt type anion-exchange group and a constituent unit having a haloalkyl group. Due to the polymer, the ionic conductivity and the gas diffusion properties are kept high and the swelling of the electrode catalyst layer in a post-crosslinking step can be minimized to form a highly active catalytic electrode layer and obtain an excellent fuel-cell output.