A membrane-electrode assembly for a solid polymer electrolyte fuel cell is provided that uses a proton conductive membrane having high proton conductivity and also superior heat resistance and chemical durability. A membrane-electrode assembly for a solid polymer electrolyte fuel cell is provided with an anode on one side of a proton conductive membrane and a cathode on another side thereof, and the proton conductive membrane is a sulfonated polyarylene containing a structure expressed by the general formula (1) below:
—Rs—Z—Rh  (1)
In the formula (1), Z represents at least one structure selected from the group consisting of —CO—, —SO2—, and —SO—; Rs represents a direct bond or any divalent organic group; and Rh represents a nitrogen-containing heterocyclic group.
                            提供了一种用于固体聚合物电解质燃料电池的膜电极组件,该组件使用具有高质子导电性,同时具有优异的耐热性和
化学耐久性的质子导电膜。该固体聚合物电解质燃料电池的膜电极组件在质子导电膜的一侧具有阳极,在另一侧具有阴极,而质子导电膜是一种含有以下通式(1)所表示结构的磺化聚
芳烃:—Rs—Z—Rh  (1)在式(1)中,Z代表从—CO—,—SO2—和—SO—组成的群体中选择的至少一个结构;Rs代表直接键或任何二价有机基团;而Rh代表含有氮的杂环基团。