US3926675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making electrodes containing raney nickel and a thiocyanate
Assignee: Siemens AG
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Filing: 1973-09-17
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Granted: 1975-12-16
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Expires: 1993-09-17
Abstract
Abstract A new method is disclosed for preparing electrodes containing Raney nickel to be employed for the electrochemical conversion of hydrazine, in which a thiocyanate is introduced into the electrodes, advantageously by impregnating the electrodes with a thiocyanate solution. Electrodes prepared according to the invention generally contain a thiocyanate approximately in the range of between about 5 and about 25% by weight, based upon the amount of Raney nickel therein, and are useful as anodes in hydrazine/oxygen fuel cells.
Inventors
- 👤 Hans Kohlmuller
- 👤 Gerlind Kohlmuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:40
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/98; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
45 words
IN A PROCESS OF GENERATING ELECTRICALLY IN A FUEL CELL WHEREIN THE FUEL COMPRISES HYDRAZINE, THE IMPROVEMENT OF EMPLOYING A FUEL ELECTRODE COMPRISING RANEY NICKEL AND AN ALKALI METAL THIOCYANATE IN THE AMOUNT OF BETWEEN ABOUT 5 TO 25 WEIGHT % BASED ON SAID NICKEL.
Claim 2
Dependent Claim
45 words
IN A PROCESS OF GENERATING ELECTRICALLY IN A FUEL CELL WHEREIN THE FUEL COMPRISES HYDRAZINE, THE IMPROVEMENT OF EMPLOYING A FUEL ELECTRODE COMPRISING RANEY NICKEL AND AN ALKALI METAL THIOCYANATE IN THE AMOUNT OF BETWEEN ABOUT 5 TO 25 WEIGHT % BASED ON SAID NICKEL.
Claim 3
Dependent Claim
24 words
The process of making an electrode adapted for use in a fuel cell, which process comprises impregnating Raney nickel with an alkali metal thiocyanate.
Claim 4
Dependent Claim
24 words
The process of making an electrode adapted for use in a fuel cell, which process comprises impregnating Raney nickel with an alkali metal thiocyanate.
Claim 5
Dependent Claim
25 words
The process of claim 2, wherein said impregnating step comprises immersing a previously fabricated Raney nickel electrode in a dilute aqueous alkali metal thiocyanate solution.
Claim 6
Dependent Claim
15 words
The process of claim 3, wherein said aqueous solution also contains an alkali metal hydroxide.
Claim 7
Dependent Claim
18 words
The process of claim 3, wherein the concentration of said thiocyanate in said solution is about 0.0015 molar.
Claim 8
Dependent Claim
13 words
The process of claim 3, wherein said thiocyanate is potassium or sodium thiocyanate.
Claim 9
Dependent Claim
18 words
An electrode adapted for use in a fuel cell comprising Raney nickel impregnated with an alkali metal thiocyanate.
Claim 10
Dependent Claim
18 words
An electrode adapted for use in a fuel cell comprising Raney nickel impregnated with an alkali metal thiocyanate.
Claim 11
Dependent Claim
21 words
The electrode of claim 7, wherein said thiocyanate comprises from about 5 to about 25% by weight of said Raney nickel.
Claim 12
Dependent Claim
13 words
The electrode of claim 8, wherein said thiocyanate is potassium or sodium thiocyanate.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |