Solid polymer electrolyte composite membrane comprising...

Details Solid polymer electrolyte composite membrane comprising... Solid polymer electrolyte composite membrane comprising...

2004-10-21

2010-10-05

Alanko, Anita K (Department: 1713)

Etching a substrate: processes

Forming groove or hole in a substrate which is subsequently...

C216S013000, C216S017000, C216S049000, C216S056000, C216S067000

Reexamination Certificate

active

07807063

ABSTRACT:
A solid polymer electrolyte composite membrane and method of manufacturing the same. According to one embodiment, the composite membrane comprises a rigid, non-electrically-conducting support, the support preferably being a sheet of polyimide having a thickness of about 7.5 to 15 microns. The support has a plurality of cylindrical pores extending perpendicularly between opposing top and bottom surfaces of the support. The pores, which preferably have a diameter of about 0.1 to 5 microns, are made by plasma etching and preferably are arranged in a defined pattern, for example, with fewer pores located in areas of high membrane stress and more pores located in areas of low membrane stress. The pores are filled with a first solid polymer electrolyte, such as a perfluorosulfonic acid (PFSA) polymer. A second solid polymer electrolyte, which may be the same as or different than the first solid polymer electrolyte, may be deposited over the top and/or bottom of the first solid polymer electrolyte.

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