Composite polymer electrolytes for proton exchange membrane fuel cells
First Claim
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1. A method of fabricating a composite electrolyte for use in an electrochemical fuel cell, comprising:
- (i) applying onto a surface of a substrate a viscous liquid composition of (a) an inorganic cation exchange material, (b) silica-based material, (c) a polymer-based material, and (d) a solvent-dispersant;
(ii) spreading the viscous liquid composition to form a uniform thickness layer on the substrate; and
(iii) allowing the solvent to evaporate from the viscous liquid composition to yield the composite electrolyte, wherein the inorganic cation exchange material comprises about 0.1 wt % to about 99 wt % of the composite electrolyte.
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Abstract
Thin films of inexpensive composite polymer electrolyte membranes containing inorganic cation exchange materials including various clay based fillers are fabricated by solution casting. The membranes exhibit higher ion exchange capacity, proton conductivity and/or lower gas crossover. In general, the composite membranes exhibit excellent physicochemical properties and superior fuel cell performance in hydrogen oxygen fuel cells.
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15 Claims
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1. A method of fabricating a composite electrolyte for use in an electrochemical fuel cell, comprising:
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(i) applying onto a surface of a substrate a viscous liquid composition of (a) an inorganic cation exchange material, (b) silica-based material, (c) a polymer-based material, and (d) a solvent-dispersant;
(ii) spreading the viscous liquid composition to form a uniform thickness layer on the substrate; and
(iii) allowing the solvent to evaporate from the viscous liquid composition to yield the composite electrolyte, wherein the inorganic cation exchange material comprises about 0.1 wt % to about 99 wt % of the composite electrolyte. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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