Composite ion exchange membrane and electrolyte membrane electrode assembly
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United States of America Patent
Stats
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May 26, 2009
Grant Date -
May 5, 2005
app pub date -
Feb 3, 2003
filing date -
Feb 15, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention provides a composite ion exchange membrane which has high mechanical strength and is suitable for use as a solid polymer electrolyte membrane excellent in ionic conductivity and a method for its production. The invention is achieved by a composite ion exchange membrane including a composite layer comprising a support membrane with continuous voids formed of polybenzazole polymer, the support membrane being impregnated with ion exchange resin, and surface layers formed of ion exchange resin free of support membranes, the surface layers being formed on both surfaces of the composite layer so as to sandwich the composite layer therebetween.
First Claim
Family
International Classification(s)
Cited Art Landscape
| Patent Info | (Count) | # Cites | Year |
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| * 6248469 Composite solid polymer electrolyte membranes | 142 | 1999 | |
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| 5654109 Composite fuel cell membranes | 35 | 1995 | |
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| 5998057 Gas diffusion electrode for polymer electrolyte membrane fuel cells | 42 | 1998 | |
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| 4533692 Liquid crystalline polymer compositions, process, and products | 76 | 1982 | |
| 4703103 Liquid crystalline polymer compositions, process and products | 56 | 1984 | |
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| * 6176984 High temperature polybenzazole and polyether electrolytes | 3 | 1999 | |
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| * 6977009 Metal coated polymer electrolyte membrane having a reinforcement structure | 7 | 2002 | |
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| * 6902801 Composite ion exchange material | 7 | 2001 | |
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| 4359567 Thermooxidatively stable articulated p-benzobisoxazole and p-benzobisthiazole polymers | 33 | 1981 | |
| 4578432 Method for making heterocyclic block copolymer | 28 | 1985 | |
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| 4533724 Liquid crystalline poly (2,6-benzothiazole) compositions, process, and products | 59 | 1982 | |
| 4533693 Liquid crystalline polymer compositions, process, and products | 115 | 1983 | |
Patent Citation Ranking
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