Patent US4160047A successfully refreshed from Google Patents.
US4160047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive nickel electrode for alkaline storage batteries and process for its production
Assignee: Volkswagen AG
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Filing: 1978-06-28
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Granted: 1979-07-03
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Expires: 1998-06-28
Abstract
Abstract A positive nickle electrode for alkaline storage batteries formed to contain aluminum hydroxide. A porous supporting grid of conducting material is immersed in an impregnating solution containing a nickel salt dissolved in a solvent and at least one aluminum salt in solution. The grid is subsequently immersed in an alkaline medium where the hydroxides are precipitated.
Inventors
- 👤 Nikolaus Saridakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:33
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/52; H01M4/24; H01M4/26; H01M4/28; 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
88 words
In a process for the production of a positive nickel electrode for alkaline storage batteries wherein a porous supporting grid of conducting material is immersed in an impregnating solution containing a nickel salt dissolved in a solvent, and said grid is subsequently immersed in an alkaline medium for precipitating out hydroxides, the improvement wherein said impregnating solution contains a least one aluminum salt in solution and wherein prior to impregnation with the impregnating solution, the supporting grid is immersed in a pre-impregnating solution comprising an aluminum salt solution.
Claim 2
Dependent Claim
88 words
In a process for the production of a positive nickel electrode for alkaline storage batteries wherein a porous supporting grid of conducting material is immersed in an impregnating solution containing a nickel salt dissolved in a solvent, and said grid is subsequently immersed in an alkaline medium for precipitating out hydroxides, the improvement wherein said impregnating solution contains a least one aluminum salt in solution and wherein prior to impregnation with the impregnating solution, the supporting grid is immersed in a pre-impregnating solution comprising an aluminum salt solution.
Claim 3
Dependent Claim
13 words
A process according to claim 1, wherein the aluminum salt comprises aluminum chloride.
Claim 4
Dependent Claim
13 words
A process according to claim 1, wherein the aluminum salt comprises aluminum nitrate.
Claim 5
Dependent Claim
41 words
A process according to claim 1, 2, or 3, wherein the aluminum salt solution has a density of approximately 1.2 g/cm 3 , and is added in an amount up to 1 cm 3 per 1 g of the nickel salt.
Claim 6
Dependent Claim
42 words
A process according to claim 1, 2, or 3, wherein the aluminum salt solution has a density of approximately 1.2 g/cm 3 , and is added in an amount between 0.35 and 0.7 cm 3 per 1 g of the nickel salt.
Claim 7
Dependent Claim
14 words
A process according to claim 1, wherein said solvent has a low surface tension.
Claim 8
Dependent Claim
11 words
A process according to claim 6, wherein said solvent is acetone.
Claim 9
Dependent Claim
11 words
A process according to claim 6, wherein said solvent is ethanol.
Claim 10
Dependent Claim
12 words
A process according to claim 1, wherein said impregnating solution comprises glucose.
Claim 11
Dependent Claim
37 words
A process according to claim 9, wherein said glucose solution has a density of about 1.1 g/cm 3 , and is added in an amount up to 0.25 cm 3 per 1 g of the nickel salt.
Claim 12
Dependent Claim
14 words
A process according to claim 1, wherein said impregnating solution contains a higher alcohol.
Claim 13
Dependent Claim
18 words
A process according to claim 1, wherein said impregnating solution contains a small amount of a cobalt salt.
Claim 14
Dependent Claim
27 words
A process according to claim 12, wherein said impregnating solution contains between 2.5 and 10 parts by weight cobalt salt per 100 parts by weight nickel salt.
Claim 15
Dependent Claim
32 words
A process according to claim 1, wherein said solvent has a low surface tension, and said impregnating solution further comprises glucose, a higher alcohol, and a small amount of a cobalt salt.
References Cited (Backward Citations)
US3228795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-02 | 1983-01-01 | 1983-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-02 | 1987-01-01 | 1987-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-02 | 1991-01-01 | 1991-07-03 | $7700.00 | Window Closed / Lapsed |