US Patent No: 5,372,981

Number of patents in Portfolio can not be more than 2000

Method of preparing metal-heterocarbon-nitrogen catalyst for electrochemical cells

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Abstract

In a preferred method, electrodes are formed with a catalyzed carbon substrate for use in an electrochemical cell. The catalyzed carbon substrate basically comprises carbon particles having internal and external surfaces defining a plethora of pores; and a pyrolyzed metal-doped copolymer material supported on the internal and external surfaces of the carbon particles. The pyrolyzed metal-doped material is a metal/nitrogen-carbon complex where the metal is complexed with the heterocarbon/nitrogen. Substrates of catalyzed carbon particles are prepared by first reacting an amine compound with formaldehyde and/or polymerized formaldehyde in solution, in the presence of a catalyst, carbon particles and a metal salt, at a temperature and at a rate of stirring sufficient to provide a polymerized product in the form of a gel. Then the gel is heated (pyrolyzed) in an inert atmosphere for a time sufficient to provide the catalytic carbon particles in the form of a powder. The powder is then mixed with a binder, and electrodes are pressed and formed into a suitably shaped substrate of catalytic carbon.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
GM GLOBAL TECHNOLOGY OPERATIONS LLCDETROIT, MI7524

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Witherspoon, Romeo R Shelby Township, Utica County, MI 7 75

Cited Art

Patent Info (Count) # Cites Year
 
THE DOW CHEMICAL COMPANY (2)
5,171,644 Electrochemical cell electrode 20 1991
5,151,515 Oxygen reduction catalyst based upon metal dipyridylamines 12 1991
 
GM GLOBAL TECHNOLOGY OPERATIONS, INC. (1)
5,240,893 Method of preparing metal-heterocarbon-nitrogen catalyst for electrochemical cells 11 1992
 
SUMITOMO ELECTRIC INDUSTRIES, LTD. (1)
4,849,251 Method of manufacturing an electric resistance element 8 1988

Patent Citation Ranking

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