Electrolytic membrane for fuel cell and its manufacturing...

Details Electrolytic membrane for fuel cell and its manufacturing... Electrolytic membrane for fuel cell and its manufacturing...

2008-03-18

2008-03-18

Weiner, Laura (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S047000, C429S047000, C429S047000, C429S006000, C429S047000, C429S010000

Reexamination Certificate

active

09936148

ABSTRACT:
A conventional direct methanol solid polymer fuel cell comprises a solid polymer electrolyte as an electrolyte. This type of cell involves some problems; methanol permeates the membrane; the electromotive force lowers because of direct oxidation; and the membrane melts at about 130° C. when the temperature is increased to enhance the catalyst activity. According to the invention, an electrolyte membrane made of a porous substrate (1) that does not swell substantially with methanol and water and has pores (2) filled with a polymer (3) having proton conductivity is produced and used to suppress the permeation of methanol as much as possible, providing an electrolyte membrane for fuel cells endurable in a high-temperature environment, a fuel cell comprising such a membrane, a method of manufacturing such a fuel cell, and a method of manufacturing an electrolyte membrane comprising irradiation a porous substrate having swell-resistance against organic solvent and water with energy and contacting the substrate with a monomer to cause polymerization.

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