Novel air electrode for metal-air battery with new carbon materi

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

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429 45, 423449, 423460, 502101, H01M 486, C09C 156

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active

049277189

ABSTRACT:
A novel carbonaceous electrode support material is disclosed characterized by a corrosion rate of 0.03 wt. %/hour or less when measured a5 550 millivolts vs. a Hg/HgO electrode in a 30 wt. % KOH electrolyte a5 30.degree. C. The electrode support material comprises a preselected carbon black material which has been heat-treated by heating the material to a temperature of from about 2500.degree. to about 3000.degree. C. over a period of from about 1 to about 5 hours in an inert atmosphere and then maintaining the preselected carbon black material at this temperature for a period of at least about 1 hour, and preferably about 2 hours, in the inert atmosphere.
A carbonaceous electrode suitable for use as an air electrode in a metal-air cell may be made from the electrode support material by shaping and forming it into a catalyst support and then impregnating it with a catalytically active material capable of catalyzing the reaction with oxygen at the air electrode of metal-air cell.

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Kinoshita, Carbon, Electrochemical and Physiochemical Properties; New York et al, John Wiley and Sons, Inc. 1988, pp. 5.noteq.6.

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