Tailored-carbon substrate for fuel cell electrodes

Details Tailored-carbon substrate for fuel cell electrodes Tailored-carbon substrate for fuel cell electrodes

1975-06-27

1976-10-12

Mack, John H.

Chemistry: electrical current producing apparatus, product, and

Having earth feature

4234471, 4234472, H01M 486, H01M 488

Patent

active

039855783

ABSTRACT:
In accordance with a preferred embodiment of this invention, the polarization or overvoltage of a carbon black-based air cathode is significantly reduced by adding from 1 to 5 percent, by weight based on the total carbon composition, of carbon derived from poly(vinylidene chloride) (hereinafter PVdC) to the carbon black, prior to the formation of the electrode. To accomplish this, the porous and particulate carbon black is initially blended with a solution of PVdC; the resulting blend is dried, and then dehydrochlorinated and baked at a temperature in the range of from 900.degree. C. to 1,100.degree. C. The electrocatalytic layer of the cathode is then prepared from this tailored carbon substrate.

REFERENCES:
patent: 3258363 (1966-06-01), Lieb
patent: 3647551 (1972-03-01), Reed
patent: 3801374 (1974-04-01), Dews et al.

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