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

Abstract

A method of making a combination, unitary, membrane and electrode assembly having a solid polymer electrolyte membrane, and first and second electrodes at least partially embedded in opposed surfaces of the membrane. The electrodes each comprise a respective group of finely divided carbon particles, very finely divided catalytic particles supported on internal and external surfaces of the carbon particles and a proton conductive material intermingled with the catalytic and carbon particles. A first group of finely divided carbon particles forming the first electrode has greater water attraction and retention properties, and is more hydrophilic than a second group of carbon particles forming the second electrode. In a preferred method, the membrane electrode assembly of the invention is prepared by forming a slurry of proton conductive material and at least one group of the carbon and catalyst particles. The slurry is applied to the opposed surfaces of the membrane and heated while being pressed to the membrane for a time and at a temperature and compressive load sufficient to embed at least a portion of the particles into the membrane.

Inventors:
 [1];  [2]
  1. (Troy, MI)
  2. (Sterling Heights, MI)
Issue Date:
Research Org.:
General Motors Corp
OSTI Identifier:
869331
Patent Number(s):
5316871
Assignee:
General Motors Corporation (Detroit, MI) CHO
DOE Contract Number:  
AC02-90CH10435
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; membrane-electrode; assemblies; electrochemical; cells; combination; unitary; membrane; electrode; assembly; solid; polymer; electrolyte; electrodes; partially; embedded; opposed; surfaces; comprise; respective; finely; divided; carbon; particles; catalytic; supported; internal; external; proton; conductive; material; intermingled; forming; water; attraction; retention; properties; hydrophilic; preferred; prepared; slurry; catalyst; applied; heated; pressed; time; temperature; compressive; load; sufficient; embed; portion; opposed surfaces; membrane electrode; external surface; electrolyte membrane; preferred method; catalyst particles; electrode assembly; electrochemical cells; conductive material; electrochemical cell; polymer electrolyte; solid polymer; finely divided; carbon particles; compressive load; retention properties; load sufficient; particles supported; opposed surface; external surfaces; divided carbon; partially embedded; membrane-electrode assemblies; catalyst particle; electrode assemblies; /429/

Citation Formats

Swathirajan, Sundararajan, and Mikhail, Youssef M. Method of making membrane-electrode assemblies for electrochemical cells and assemblies made thereby. United States: N. p., 1994. Web.
Swathirajan, Sundararajan, & Mikhail, Youssef M. Method of making membrane-electrode assemblies for electrochemical cells and assemblies made thereby. United States.
Swathirajan, Sundararajan, and Mikhail, Youssef M. Sat . "Method of making membrane-electrode assemblies for electrochemical cells and assemblies made thereby". United States. https://www.osti.gov/servlets/purl/869331.
@article{osti_869331,
title = {Method of making membrane-electrode assemblies for electrochemical cells and assemblies made thereby},
author = {Swathirajan, Sundararajan and Mikhail, Youssef M.},
abstractNote = {A method of making a combination, unitary, membrane and electrode assembly having a solid polymer electrolyte membrane, and first and second electrodes at least partially embedded in opposed surfaces of the membrane. The electrodes each comprise a respective group of finely divided carbon particles, very finely divided catalytic particles supported on internal and external surfaces of the carbon particles and a proton conductive material intermingled with the catalytic and carbon particles. A first group of finely divided carbon particles forming the first electrode has greater water attraction and retention properties, and is more hydrophilic than a second group of carbon particles forming the second electrode. In a preferred method, the membrane electrode assembly of the invention is prepared by forming a slurry of proton conductive material and at least one group of the carbon and catalyst particles. The slurry is applied to the opposed surfaces of the membrane and heated while being pressed to the membrane for a time and at a temperature and compressive load sufficient to embed at least a portion of the particles into the membrane.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

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