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Composite polymer electrolytes for proton exchange membrane fuel cells

  • US 7,183,017 B2
  • Filed: 04/11/2005
  • Issued: 02/27/2007
  • Est. Priority Date: 08/13/2002
  • Status: Expired due to Fees
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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