| 摘要 |
There is provided a membrane-electrode assembly including catalyst layers disposed on both surfaces of an electrolyte membrane, wherein water transfer resistance of said electrolyte membrane, calculated by the following formula (F1), is 10 μm·g/meq or less and a platinum amount contained in at least one of the catalyst layers is 0.02 to 0.20 mg/cm2. [Water transfer resistance]=[membrane thickness of electrolyte membrane (μm)]/[ion exchange capacity of electrolyte membrane (meq/g)]  (F1)
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