US4358892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing battery and electrolytic cell electrodes
Assignee: ESB Corp
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Filing: 1981-04-18
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Granted: 1982-11-16
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Expires: 2001-04-18
Abstract
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.
Inventors
- 👤 Pierre P. Turillon
- 👤 Michael N. Hull
- 👤 George F. Nordblom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:35
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/14; H01M4/64; H01M4/66; H01M4/68; H01M6/00; H01M6/42; H01M6/46; H01M6/48; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49115
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
132 words
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.
Claim 2
Dependent Claim
132 words
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.
Claim 3
Dependent Claim
33 words
A process as in claim 1 wherein the structurally strong body of metal is formed by sintering a shaped mass of metal powder to provide a maze of interconnected pores in said body.
Claim 4
Dependent Claim
23 words
A process as in claim 1 wherein the structurally strong body of metal is formed in the configuration of a lead-acid battery grid.
Claim 5
Dependent Claim
23 words
A process as in claim 3 wherein positive lead-acid material is pasted on the surface of said grid exposed in use to electrolyte.
Claim 6
Dependent Claim
20 words
A process as in claim 1 wherein the metal passivatable in said electrolyte is titanium, tantalum, niobium or alloys thereof.
Claim 7
Dependent Claim
45 words
A process as in claim 1 wherein the pores are filled with electroconductive oxide by infiltrating the porous structurally strong body with a metal or alloy which can form an electroconductive oxide and thereafter electrochemically oxidizing said metal or alloy to form said electroconductive oxide.
Claim 8
Dependent Claim
32 words
A process as in claim 1 wherein titanium powder is compressed, if necessary, and sintered to form a structurally strong body of titanium having about 5% to 50% by volume of pores.
Claim 9
Dependent Claim
24 words
A process as in claim 6 wherein the porous structurally strong body comprises essentially titanium and is infiltrated with lead or a lead alloy.
Claim 10
Dependent Claim
23 words
A process as in claim 1 wherein said structurally strong body is formed in metallurgically bonded association with a solid mass of metal.
Claim 11
Dependent Claim
21 words
A process as in claim 9 wherein the said metal of said solid mass of metal is an electrochemical valve metal.
Claim 12
Dependent Claim
25 words
A process as in claim 9 wherein said solid mass of metal is a metal from the group of copper, iron, aluminum and alloys thereof.
Claim 13
Dependent Claim
30 words
A process as in claim 10 wherein said solid mass of electrochemical valve metal is positioned with relation to said porous matrix to form an impermeable barrier across said matrix.
Claim 14
Dependent Claim
58 words
A process as in claim 12 wherein subsequent to the formation of said matrix with said barrier, a protective metallic layer is provided on one side of said barrier and the pores in the matrix on the other side of said barrier are filled, at least in the volumes of pores adjacent the exposed surface, with electroconductive oxide.
Claim 15
Dependent Claim
49 words
A process as in claim 13 wherein said matrix is shaped in the form of a bi-polar lead-acid battery grid, negative lead-acid active material is positioned on said protective metallic layer and positive lead-acid active material is positioned on the free surface on the other side of said barrier.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |