Patent ID: 8043762

Claim:
An electrode paste which comprises catalyst particles, a solvent and an electrode electrolyte for a solid polymer fuel cell electrolyte, wherein the electrode electrolyte comprises a polymer with a structure having a main chain including a polyphenylene, a side chain including a sulfonic acid group and a repeating structural unit represented by formula (C) as a side chain including a nitrogen-containing heterocyclic group; wherein Z is at least one structure selected from the group consisting of a direct bond, —O— and —S—; Y is at least one structure selected from the group consisting of —CO—, —SO 2 —, —SO—, —CONH—, —COO—, —(CF 2 ) l and —C(CF 3 ) 2 —; l is an integer of 1 to 10; R 20 is a nitrogen-containing heterocyclic group; q is an integer of 1 to 5; and p is an integer of 0 to 4, wherein the electrode paste is configured as part of a solid polymer fuel cell.