Process of preparing electrode for fuel cell
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United States of America Patent
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Feb 16, 1993
Grant Date -
N/A
app pub date -
Oct 25, 1991
filing date -
Oct 25, 1990
priority date (Note) -
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Abstract
Disclosed are processes of preparing an electrode for a fuel cell which comprises impregnating catalyst particles with a solution of ion exchange resin to form, after drying, a thin layer of the ion exchange resin on the surface thereof, impregnating non-catalyst particles separately prepared with a solution of ion exchange resin to form, after drying, a thicker layer of the ion exchange resin on the surface thereof than that on the catalyst particle surface, mixing the two kinds of particles coated with the ion exchange resin film with a hydrophobic binder, forming a sheet-like catalyst layer by means of hot pressing or cold pressing and thermally bonding this sheet-like catalyst layer and an ion exchange membrane under pressure. The last thermal bonding step may be simultaneously carried out with the previous catalyst layer forming step.
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