Membrane electrode assembly and fuel cell unit

摘要

An anode electrode (24) is provided on one side of a solid polymer electrolyte membrane (22), and a cathode electrode (26) is provided on the other side of the solid polymer electrolyte membrane (22). The solid polymer electrolyte membrane (22) is formed such that its outer peripheral portion extends the anode electrode and the cathode electrode on both sides thereof. A frame-shaped first sealing member (27) is closely contacted with the outer peripheral edge face of the anode electrode or the cathode electrode. The frame-shaped first sealing member (27) coats and supports one face (23a) of the extending part (23) of the solid polymer electrolyte membrane (22). A membrane electrode assembly that can increase durability by increasing the strength of an extending part of a solid polymer electrolyte membrane, and can also reduce cost by minimizing the volume of the solid polymer electrolyte membrane used is provided.