US4551358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode preparation
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1984-06-11
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Granted: 1985-11-05
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Expires: 2004-06-11
Abstract
Abstract A nickel oxide electrode is made by impregnating a porous nickel substrate with a dispersion of a nickel compound, converting the compound in situ to nickel hydroxide, and removing reaction products. In order to overcome corrosion problems, facilitate removal of by-products and improve electrode performance, the dispersion is provided in a non-aqueous medium (e.g. as a methanolic solution of NiCl 2 .6H 2 O) such that the in situ conversion gives rise to the nickel hydroxide in the form of a gel and to easily removable (e.g. volatile) reaction products. Such a conversion may be carried out by contacting the methanolic solution with an epoxy compound such as propylene oxide.
Inventors
- 👤 Edward S. Lane
- 👤 Michael R. H. Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:18
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/32; H01M4/26; H01M4/28; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
A method of making a nickel oxide electrode which comprises (i) impregnating a porous nickel substrate for an electrode with a solution of a nickel compound in a non-aqueous liquid medium, said nickel compound being convertible to nickel hydroxide gel in step (ii); (ii) contacting the impregnated substrate with an epoxy compound thereby to convert the nickel compound in situ to nickel hydroxide gel; and (iii) removing reaction product(s) to provide the final electrode.
Claim 2
Independent Claim
74 words
A method of making a nickel oxide electrode which comprises (i) impregnating a porous nickel substrate for an electrode with a solution of a nickel compound in a non-aqueous liquid medium, said nickel compound being convertible to nickel hydroxide gel in step (ii); (ii) contacting the impregnated substrate with an epoxy compound thereby to convert the nickel compound in situ to nickel hydroxide gel; and (iii) removing reaction product(s) to provide the final electrode.
Claim 3
Dependent Claim
13 words
A method as claimed in claim 1 wherein the non-aqueous liquid is methanol.
Claim 4
Dependent Claim
16 words
A method as claimed in claim 1 wherein the epoxy compound is a lower alkylene oxide.
Claim 5
Dependent Claim
66 words
A method as claimed in claim 1 wherein the final electrode is additionally provided with cobalt hydroxide by impregnating the substrate with a solution of a cobalt compound in a non-aqueous liquid medium, said cobalt compound being convertible to cobalt hydroxide gel; contacting the impregnated substrate with an epoxy compound thereby to convert the cobalt compound in situ to cobalt hydroxide gel; and removing reaction product(s).
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) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |