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US4399005A
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Method of nickel electrode production
Assignee: United States, UNITED STATES AIR FORCE, Secretary of
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Filing: 1981-12-21
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Granted: 1983-08-16
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Expires: 2001-12-21
Abstract
Abstract A method for preparing nickel electrodes is provided in which zinc hydroxide is deposited onto a metal plaque simultaneously with nickel hydroxide. A nickel electrode so prepared exhibits improved dimensional stability.
Inventors
- 👤 David H. Fritts
- 👤 John F. Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:32
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/26; H01M4/30; H01M4/28; H01M4/29; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
A process for making a nickel electrode which comprises the steps of: (a) immersing a porous, electrically conductive plaque in an electrolyte bath provided with a counter-electrode, said bath comprising an aqueous solution of nickel nitrate; (b) forming the conductive plaque against the said counter-electrode at a desired current density; (c) continuously adding, at a desired rate, an aqueous solution of zinc nitrate to said electrolyte bath; and (d) continuing said forming step (b) and said addition step (c) for a time sufficient to convert the metal nitrates in the pores of said plaque to a desired level of the corresponding metal hydroxides.
Claim 2
Dependent Claim
103 words
A process for making a nickel electrode which comprises the steps of: (a) immersing a porous, electrically conductive plaque in an electrolyte bath provided with a counter-electrode, said bath comprising an aqueous solution of nickel nitrate; (b) forming the conductive plaque against the said counter-electrode at a desired current density; (c) continuously adding, at a desired rate, an aqueous solution of zinc nitrate to said electrolyte bath; and (d) continuing said forming step (b) and said addition step (c) for a time sufficient to convert the metal nitrates in the pores of said plaque to a desired level of the corresponding metal hydroxides.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein said electrolyte bath comprises about 75 to about 150 grams of nickel per liter of solution.
Claim 4
Dependent Claim
21 words
The process of claim 2 wherein said electrolyte bath initially comprises from about 2 to about 10 ppm of zinc nitrate.
Claim 5
Dependent Claim
25 words
The process of claim 1 wherein said electrolyte bath is adjusted during said forming to maintain the pH in the range of 2 to 4.
Claim 6
Dependent Claim
25 words
The process of claim 1 wherein said electrolyte bath is adjusted during said forming to maintain the pH in the range of 3.3 to 3.7.
Claim 7
Dependent Claim
22 words
The process of claim 1 wherein said current density is in the approximate range of 0.2 to 0.6 ampere per square inch.
Claim 8
Dependent Claim
23 words
The process of claim 1 wherein said electrolyte bath is maintained at a temperature in the approximate range of 70° to 100° C.
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) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |