Composite Water Management Electrolyte Membrane For A Fuel Cell
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United States of America Patent
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Issued Date -
Jan 15, 2009
app pub date -
Apr 7, 2006
filing date -
Apr 7, 2006
priority date (Note) -
Abandoned
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Abstract
A composite electrolyte membrane (10) for a fuel cell (30) includes an ionomer component (16) extending continuously between opposed first and second contact surfaces (12, 14) defined by the membrane (10). The ionomer component is a hydrated nanoporous ionomer consisting of a cation exchange resin. The membrane (10) also includes a microporous region (18) consisting of the ionomer compound (16) and a structural matrix (20) dispersed through region (18) within the ionomer compound (16) to define open pores having a diameter of between 0.3 and 1.0 microns. The microporous region (18) does not extend between the contact surfaces (12, 14), and facilitates water management between the electrode catalysts (32, 34).
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