Method of producing battery and electrolytic cell electrodes
AssigneesThe International Nickel Company, Inc., ESB Incorporated
InventorsPierre P. Turillon, Michael N. Hull, George F. Nordblom
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Abstract
A composite electrode having a structural electrode member with at least a portion of one surface of the electrode member constructed from a continuous matrix of an anodically passivatable metal infiltrated by a metal capable of forming an electroconductive oxide and having the infiltrating metal at the electrode surface oxidized such that an electric current path is provided through the oxidized surface of the matrix metal. In one embodiment the matrix metal is an electrochemical valve metal, e.g., titanium and the infiltrating metal is lead. Applications for the composite electrode include battery grids and electrochemical processing electrodes.
Claims14
A process for producing an article of manufacture adapted to be used with an electrolyte such that in use at least part of the surface of said article is exposed to said electrolyte and, at least part of the time, is at an oxidizing potential comprising
- A. forming a structurally strong body of metal passivatable in said electrolyte at said oxiding potential in the configuration of said article, said body containing pores, and
- B. filling said pores, at least in the vicinity of the surface of said article to be exposed to said electrolyte with an electroconductive oxide insoluble in said electrolyte in sufficient amount to block entry of said electrolyte into said pores and provide sufficient electrical resistance to inhibit oxidation of metal at the inner face of said electroconductive oxide.
Dependencies are inferred from the claim text.