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Membrane-electrode assemblies for electrochemical cells

Patent ·
OSTI ID:869084
 [1];  [2]
  1. Troy, MI
  2. Sterling Heights, MI
+ Show Author Affiliations

A combination, unitary, membrane and electrode assembly with 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.

Research Organization:
GENERAL MOTORS CORP
DOE Contract Number:
AC02-90CH10435
Assignee:
General Motors Corporation (Detroit, MI)
Patent Number(s):
US 5272017
OSTI ID:
869084
Country of Publication:
United States
Language:
English

References (7)

Thin-film catalyst layers for polymer electrolyte fuel cell electrodes journal January 1992
Methods to Advance Technology of Proton Exchange Membrane Fuel Cells journal January 1988
Localization of platinum in low catalyst loading electrodes to to attain high power densities in SPE fuel cells journal September 1988
Advances in solid polymer electrolyte fuel cell technology with low platinum loading electrodes journal March 1988
The application of Dow Chemical's perfluorinated membranes in proton-exchange membrane fuel cells journal February 1990
The renaissance of the solid polymer fuel cell journal January 1990
Recent advances in solid polymer electrolyte fuel cell technology with low platinum loading electrodes journal February 1990

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Related Subjects

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applied
assemblies
assembly
attraction
carbon
carbon particles
catalyst
catalyst particle
catalyst particles
catalytic
cells
combination
compressive
compressive load
comprise
conductive
conductive material
divided
divided carbon
electrochemical
electrochemical cell
electrochemical cells
electrode
electrode assemblies
electrode assembly
electrodes
electrolyte
electrolyte membrane
embed
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external
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finely
finely divided
forming
heated
hydrophilic
intermingled
internal
load
load sufficient
material
membrane
membrane electrode
membrane-electrode
membrane-electrode assemblies
method
opposed
opposed surface
opposed surfaces
partially
partially embedded
particles
particles supported
polymer
polymer electrolyte
portion
preferred
preferred method
prepared
pressed
properties
proton
respective
retention
retention properties
slurry
solid
solid polymer
sufficient
supported
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temperature
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