| 摘要 |
PROBLEM TO BE SOLVED: To provide a membrane electrode assembly for a direct methanol fuel cell, excellent in durability.SOLUTION: In a direct methanol fuel cell, a membrane electrode assembly 11 includes a polymer electrolyte membrane 111, first and second anode catalyst layers 112a, 112b, and first and second cathode catalyst layers 113a, 113b, and satisfies formulae (1)-(6). I>I(1); S<S(2); I>I(3); S<S(4); 0.9≤I/C≤3 (5); and 0.9≤I/C≤3 (6) (where, I, I, Iand Irepresent percentage contents of first or second polymer substance in the first and second anode and cathode catalyst layers; S, S, Sand Srepresent contents of an anode or cathode catalyst in the first and second anode and cathode catalyst layers; and Cand Crepresent percentage contents of conductive carbon particles supporting the catalysts of the first anode and cathode catalyst layers)SELECTED DRAWING: Figure 1 |
