US3899351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of electrodes for alkaline batteries
Assignee: AT&T Inc
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Filing: 1974-06-12
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Granted: 1975-08-12
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Expires: 1994-06-12
Abstract
Abstract A process is described for the fabrication of aqueous alkaline batteries in which the electrodes are formed (cycled to remove undesirable ions and surface material from the electrode) under unusual conditions. These unusual conditions involve a charge/discharge cycle at an unusually high current rate in highly concentrated basic aqueous electrolyte at a temperature from 40*C to the boiling point of the electrolyte. Formation carried out in this way is far more rapid than by traditional methods and accomplishes the same purposes. Further, this procedure for forming the electrodes can be carried out on a continuous basis which is economically desirable in the commercial manufacture of alkaline batteries.
Inventors
- 👤 Dean William Maurer
- 👤 Leona Louise Schull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:54
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/26; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
99 words
A PROCESS FOR THE FABRICATION OF ALKALINE CELLS IN WHICH AT LEAST ONE OF THE ELECTRODES IS MADE BY A SERIES OF STEPS COMPRISING IMPREGNATING A NICKEL PLAQUE AND FORMING THE IMPREGNATED NICKEL PLAQUE CHARACTERIZED IN THAT FORMING IS CARRIED OUT IN AN AQUEOUS ELECTROLYTE CONTAINING A BASE WITH A BASTICITY CONSTANT GREATER THAN 0.1 WITH CONCENTRATION BETWEEN 4 MOLAR AND THE SATURATION CONCENTRATION OF THE AQUEOUS ELECTROLYTE WITH FORMING TEMPERATURE BETWEEN 40*C AND THE BOILING TEMPERATURE OF THE AQUEOUS ELECTROLYTE AND WITH A CHARGE/DISCHARGE RATE IN AMPERES FROM 4 TO 10 TIMES THE AMPERE-HOUR CAPACITY OF THE ELECTRODE.
Claim 2
Dependent Claim
99 words
A PROCESS FOR THE FABRICATION OF ALKALINE CELLS IN WHICH AT LEAST ONE OF THE ELECTRODES IS MADE BY A SERIES OF STEPS COMPRISING IMPREGNATING A NICKEL PLAQUE AND FORMING THE IMPREGNATED NICKEL PLAQUE CHARACTERIZED IN THAT FORMING IS CARRIED OUT IN AN AQUEOUS ELECTROLYTE CONTAINING A BASE WITH A BASTICITY CONSTANT GREATER THAN 0.1 WITH CONCENTRATION BETWEEN 4 MOLAR AND THE SATURATION CONCENTRATION OF THE AQUEOUS ELECTROLYTE WITH FORMING TEMPERATURE BETWEEN 40*C AND THE BOILING TEMPERATURE OF THE AQUEOUS ELECTROLYTE AND WITH A CHARGE/DISCHARGE RATE IN AMPERES FROM 4 TO 10 TIMES THE AMPERE-HOUR CAPACITY OF THE ELECTRODE.
Claim 3
Dependent Claim
21 words
The process of claim 1 in which the base is selected from the group consisting of potassium hydroxide and sodium hydroxide.
Claim 4
Dependent Claim
20 words
The process of claim 2 in which the concentration of KOH in the electrolyte is from 7 to 8 Molar.
Claim 5
Dependent Claim
20 words
The process of claim 2 in which the concentration of NaOH in the electrolyte is from 4.5 to 5.5 Molar.
Claim 6
Dependent Claim
19 words
The process of claim 1 in which the formation is carried out at a temperature between 50*C and 60*C.
Claim 7
Dependent Claim
17 words
The process of claim 1 in which the formation is carried out in a single charge-discharge cycle.
Claim 8
Dependent Claim
13 words
The process of claim 1 in which the electrode is a nickel electrode.
Claim 9
Dependent Claim
13 words
The process of claim 1 in which the electrode is a cadmium electrode.
Claim 10
Dependent Claim
9 words
The electrode produced by the process of claim 1.
Claim 11
Dependent Claim
13 words
An alkaline cell containing an electrode produced by the process of claim 1.
Claim 12
Dependent Claim
29 words
A battery consisting of at least two alkaline cells electrically connected in series in which at least one cell contains an electrode made by the process of claim 1.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |