Gas diffusion electrode
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United States of America Patent
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Oct 14, 1997
Grant Date -
N/A
app pub date -
Jun 25, 1996
filing date -
Jun 25, 1996
priority date (Note) -
Expired
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Abstract
A gas diffusion electrode for an electrochemical cell and a fuel cell employing the electrode are disclosed. The electrode includes a porous body in contact with a catalyst layer comprising (i) a catalyst dispersed on the surface of a carbon support; (ii) a water-insoluble sulfonated polystyrene, poly(.alpha.-methylstyrene) or SEBS block copolymer; and (iii) a nonionic fluorocarbon polymer. The fuel cell includes two of the foregoing electrodes and a membrane of a proton-conducting polymer between the electrodes. It also includes an inlet for a gaseous fuel, an inlet for an oxygen-containing gas, and an outlet for reaction products.
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