Toyota Jidosha Kabushiki Kaisha

W.l. Gore & Associates, Co., Ltd.

Toyohiro Matsuura

Hiroshi Kato

Takeyuki Suzuki

Yasuhiro Akita

Takeshi Nagasawa

Masahiko Ishikawa

Tatsuya Kawahara

Hideki Yamada

Masanori Aimu

Tomoyuki Takane

Mikimasa Sugioka

It is an object of the present invention to provide a fuel cell electrolyte membrane reinforced with a porous substrate which has excellent durability and in which the amount of cross leakage as a result of chemical deterioration of electrolyte membrane components due to the presence of peroxide and/or radicals is particularly reduced. The present invention relates to an electrolyte membrane for a fuel cell comprising a polyelectrolyte, which contains a porous substrate and a radical scavenger dispersed in the polyelectrolyte.

Reinforced electrolyte membrane for fuel cell, membrane-electrode assembly for fuel cell, and polymer electrolyte fuel cell comprising the same

The present invention provides a reinforced electrolyte membrane for fuel cell comprising a porous substrate impregnated with a polyelectrolyte liquid dispersion, wherein either the maximum tensile strength in the machine direction (for sheet processing) (MD) or the maximum tensile strength in the transverse direction (TD; vertical to the MD direction) for the electrolyte membrane is 70 N/mmor more at 23&#xb0; C. at a relative humidity of 50% or 40 N/mmor more at 80&#xb0; C. at a relative humidity of 90%. This reinforced electrolyte membrane for fuel cell, in which the amount of fluorine ions eluted as a result of deterioration of electrolyte membrane components in particular is reduced, has excellent durability.

Reinforced electrolyte membrane for fuel cell, fuel cell membrane-electrode assembly, and solid polymer electrolyte fuel cell comprising the fuel cell membrane-electrode assembly

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Okayama, Japan

Toyohiro Matsuura