電解質膜及びその製造方法

Electrolyte film and its manufacturing method

Abstract

PROBLEM TO BE SOLVED: To provide a an electrolyte film and its manufacturing method capable of obtaining a high maximum output and substantially large mechanical strength if used for a fuel cell due, especially, to its high proton conductivity and methanol permeation interception, as well as a solid polymer fuel cell using the same. SOLUTION: The electrolyte film has a third polymer with proton conductivity filled in pores of a porous base material made by crosslinking a resin composition containing a first polymer with polyolefin of a weight-average molecular weight of 500,000 and a second polymer with a reactive functional group. The third polymer contains an acid functional group and a base functional group in the same molecule. COPYRIGHT: (C)2007,JPO&INPIT
【課題】特に、プロトン伝導性とメタノール透過阻止性が高いため、燃料電池に使用すると高い最大出力が得られ、しかも機械的強度も十分大きい電解質膜及びその製造方法、並びにそれを用いた固体高分子型燃料電池を提供する。 【解決手段】重量平均分子量50万以上のポリオレフィンを含む第1ポリマーと、反応性の官能基を有する第2ポリマーとを含有する樹脂組成物を架橋してなる多孔性基材の細孔内に、プロトン伝導性を有する第3ポリマーを充填してある電解質膜であって、前記第3ポリマーが同一分子内に酸性官能基及び塩基性官能基を有するポリマーである電解質膜。 【選択図】なし

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