US3772086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making anodes for hydrazine fuel cells
Assignee: General Electric Co
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Filing: 1972-07-17
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Granted: 1973-11-13
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Expires: 1992-07-17
Abstract
Abstract A method of making nickel boride catalyzed anodes for hydrazine fuel cells including the step of co-depositing electrolytic nickel and carbonyl nickel particles onto an appropriate conductive substrate to form a catalyst-receiving surface. Sufficient electtolytic nickel is deposited to tack the carbonyl nickel particles to the substrate and to themselves, yet not so much as to appreciably degrade the characteristic rough and jagged surfaces of the carbonyl nickel particles.
Inventors
- 👤 E Zeitner
- 👤 M Wheatley
- 👤 R Witherspoon
- 👤 S Meibuhr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:42
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8825; H01M4/8853; H01M4/90; H01M4/9041; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
234 words
A method of making a fuel electrode for use in a hydrazine-fueled fuel cell including the steps of: a. making an electrically conductive support the cathode in a nickel electroplating cell; b. filling the cell with a nickel plating bath containing particles of carbonyl nickel; c. suspending the particles in the bath above the support by rapidly stirring the bath for a predetermined time; d. passing at least about 5 coulombs per square centimeter of support and less than 24 coulombs per square centimeter of support through said cell and over a time span which greatly exceeds said predetermined time to electrolyze said bath and plate electrolytic nickel onto the support; e. codepositing the particles onto the support along with the electrolytic nickel during said predetermined time; f. discontinuing said stirring after said predetermined time and allowing said particles to gravitate onto the support while continuing the nickel plating over said time span to electrolytically deposit sufficient electrolytic nickel onto the support to securely tack the particles to the support without appreciably degrading the characteristic rough and jagged surface of the nickel particles; g. contacting the support and wetting the nickel-bound particles thereon with a solution of a soluble nickel salt and solvent therefor; and h. contacting said wetted nickel-bound particles with a solution of an alkali metal borohydride and solvent therefor to form nickel boride in situ on the nickel-bound carbonyl nickel particles.
Claim 2
Dependent Claim
32 words
The process according to claim 2 in which said predetermined time is about 10 percent ot the total plating time span and said time span extends for at least about five minutes.
Claim 3
Dependent Claim
50 words
A hydrazine anode for a hydrazine-fueled fuel cell comprising an electrically conductive support having at least about two milligrams of carbonyl nickel held in a matrix of electrolytic nickel for each square centimeter of said support and a nickel-boride catalyst formed in and firmly anchored to the carbonyl nickel particles.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |