Batteries: thermoelectric and photoelectric – Thermoelectric – Radiation pyrometer
Patent
1974-09-27
1976-06-01
Mack, John H.
Batteries: thermoelectric and photoelectric
Thermoelectric
Radiation pyrometer
136122, H01M 406, H01M 408
Patent
active
039606015
ABSTRACT:
Improved fuel cell electrodes produced by spinning a carbonaceous pitch having a mesophase content of from about 40 per cent by weight to about 90 per cent by weight to form carbonaceous pitch fiber; disposing staple lengths of the spun fiber in intimately contacting relationship with each other in a non-woven fibrous web; heating the web produced in this manner in an oxidizing atmosphere to thermoset the fibers to an extent which will allow the fibers to maintain their shape upon heating to more elevated temperatures; heating the web containing the thermoset fibers to a carbonizing temperature in an oxygen-free atmosphere so as to expel hydrogen and other volatiles; impregnating the web with a hydrophobic resin dispersion; compressing the impregnated web to remove excess fluid and form a thin, paper-like sheet; drying the compressed sheet, and heating it at a temperature sufficiently elevated to cause the hydrophobic resin impregnant to fuse and bond the fibers of the web together so as to increase the structural integrity and hydrophobicity of the web; and then treating the web with a metallic catalyst to produce the desired electrode.
REFERENCES:
patent: 3635763 (1972-01-01), Niedrash et al.
patent: 3829327 (1974-08-01), Omori et al.
Feeley H. A.
Mack John H.
Piscitello John S.
Union Carbide Corporation
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