| 摘要 |
A membrane-electrode assembly for solid polymer electrolyte fuel cells is provided that exhibits higher proton conductivity and superior thermal resistance. A polyarylene having a sulfonic acid group and a nitrogen-containing heterocyclic aromatic compound are included in a solid polymer electrolyte membrane that constitutes the membrane-electrode assembly for solid polymer electrolyte fuel cells. Preferably, the polyarylene having sulfonic acid group contains a repeating unit expressed by the general formula (A) and a repeating unit expressed by the general formula (B) shown below.
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