Electrodes for fuel cell and processes for producing the same

Chemistry: electrical current producing apparatus – product – and – Having earth feature

Reexamination Certificate

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C429S047000, C429S047000, C501S116000

Reexamination Certificate

active

06866960

ABSTRACT:
An electrode for a fuel cell of the invention comprises a cation-exchange resin, carbon particles and a catalyst metal which is amorphous. The electrode has high activity, a high catalyst utilization and high CO tolerance and is highly active in the electrochemical oxidation reaction of methanol. Furthermore these qualities of the electrode were extremely improved when the catalyst metal was loaded mainly on sites where the surface of the carbon particles contacts proton-conductive passages in the cation-exchange resin. Consequently, a fuel cell with the electrode of the invention has a high output current and a long life, and can be produced at low cost.

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patent: 6066410 (2000-05-01), Auer et al.
patent: 6344291 (2002-02-01), Hitomi
patent: 0 920 065 (1999-02-01), None
patent: 2000-173626 (2000-06-01), None
John Payne, in www.psrc.usm.edu/mauritz
ation.html.*
Naohiro Tsumura et al., Development of Ultra-low Pt-Ru Binary Alloy Loading Gas Diffusion Electrode for PEFC, The 41thBattery Symposium in Japan (2000), pp. 116-117.
H.F. Oetjen et al., Performance Data of a Proton Exchange Membrane Fuel Cell Using H2/CO as Fuel Gas, J. Electrochem. Soc., vol. 143, (1996), pp. 3838-3842.
Shuji Hitomi et al., New Conceptual Low Platinum Loading Gas Diffusion Electrode, The 40thBattery Symposium in Japan, (1999), pp. 167-168.
Shuji Hitomi et al., New Conceptual Ultra Low Platinum Loading Gas Diffusion Electrode, The 3rdInternational Fuel Cell Conference, (1999), pp. 111-114.

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