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Method of making membrane-electrode assemblies for electrochemical cells and assemblies made thereby

  • US 5,316,871 A
  • Filed: 08/05/1993
  • Issued: 05/31/1994
  • Est. Priority Date: 04/03/1992
  • Status: Expired due to Term
First Claim
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1. A method of making a combination electrolyte and electrode structure for an electrochemical cell having an electrolyte membrane of solid polymer proton conductive material with first and second spaced apart opposed surfaces and first and second electrodes at the respective first and second surface, comprising:

  • a) forming a slurry of proton conductive material and at least one group of finely divided carbon particles and very finely divided catalytic particles supported on and in the carbon particles;

    b) applying the slurry onto a first surface of the membrane;

    c) applying the slurry onto a second surface of the membrane; and

    d) heating while pressing the applied slurry for a time and at a temperature and compressive load sufficient to embed at least a portion of the particles in, respectively, the surfaces of the membrane to thereby form the first and second electrodes.

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