Composite polymer electrolytes for proton exchange membrane fuel cells
First Claim
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1. A composite electrolyte for use in electrochemical fuel cells, comprising:
- (i) an inorganic cation exchange material;
(ii) a silica-based material; and
(iii) a proton conducting moeity attached to polymer-based material, 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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Citations
29 Claims
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1. A composite electrolyte for use in electrochemical fuel cells, comprising:
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(i) an inorganic cation exchange material; (ii) a silica-based material; and (iii) a proton conducting moeity attached to polymer-based material, 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, 16, 17)
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18. An electrochemical fuel cell, comprising:
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(i) an anode; (ii) a cathode; (iii) a fuel supply to the anode; (iv) an oxidant supply to the cathode; and (v) a composite electrolyte positioned between the anode and cathode and including (a) an inorganic cation material, (b) a silica-based binder, and (c) a proton conducting moiety attached to polymer-based binder. wherein the inorganic cation exchange material comprises about 0.1 wt % to about 99 wt %, of the composite electrolyte. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification