| 摘要 |
To provide a membrane electrode assembly suitable for a fuel cell or an electrochemical device, and a direct methanol fuel cell employing the membrane electrode assembly. A membrane electrode assembly comprising an electrolyte membrane formed from a porous substrate having the interior of pores filled with a polymer electrolyte, and an electrode disposed on opposite faces of the electrolyte membrane and having a catalyst layer formed from a catalyst and a polymer electrolyte, the polymer electrolyte content in the catalyst layer being higher in a face where the catalyst layer is in contact with the electrolyte membrane than in other regions of the catalyst layer; and a direct methanol fuel cell employing the membrane electrode assembly.
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