US3877987A
Expired / Lapsed
US
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Method of manufacturing positive nickel hydroxide electrodes
Assignee: Battelle Memorial Institute Inc
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Filing: 1974-06-05
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Granted: 1975-04-15
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Expires: 1994-06-05
Abstract
Abstract Method of manufacturing a positive nickel hydroxide electrode. A highly porous core structure of organic material having a fibrous or reticular texture is provided with a double coating by successively spraying molten zinc and molten nickel so as to uniformly cover the surface of the core structure with a protective zinc coating and an overlying nickel coating. The resulting coated structure is then subjected to a thermal treatment so as to provide sintering of the nickel coating, removal of the organic core material and evaporation of the zinc of the protective coating. A consolidated, porous nickel support structure is thus produced which has substantially the same texture and porosity as the initial core structure. To provide the positive electrode including the active mass, nickel hydroxide is deposited in the pores of the nickel support structure.
Inventors
- 👤 Manfred August Gutjahr
- 👤 Rudolf Schmid
- 👤 Klaus Dieter Beccu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:38
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1121; B22F3/1137; H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/32; H01M4/64; H01M4/70; H01M4/80; B22F2998/00; B22F2999/00; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
154 words
A METHOD FOR MANUFACTURING A POSITIVE NICKEL HYDROXIDE ELECTRODE FOR GALVINIC CELLS COMPRISNG THE STEPS OF PROVIDING A HIGHLY POROUS CORE STRUCTURE OF ORGANIC MATERIAL WITH A FIBROUS OR RETICULAR TEXTURE HAVING LARGE SURFACE WITH A DOUBLE COATING BY SUCCESSITIVELY SPRAYING MOLTEN ZINC AND NICKEL ONTO THE SAID CORE STRUCTURE SO AS TO COVER SAID STRUCTURE UNIFORMLY FIRST WHEN A PROTECTIVE COATING OF ZINC THEN WITH AN OUTER COATING OF NICKEL, WHILE SUBSTANTIALLY RETAINING THE INITIAL TEXTURE AND POROSITY OF SAID CORE STRUCTURE, SUBJECTING THE RESULTING COATED STRUCTURE TO A THERMAL TREATMENT WHICH PROVIDES SINTERING OF THE SAID NICKEL COATING, REMOVAL OF THE ORGANIC CORE MATERIAL AND EVAPORATION OF THE ZINC, SO AS TO THERBY PRODUCE A STRONGLY CONSOLIDATED HIGHLY POROUS SUPPORT STRUCTURE CONSISTING SUBSTANTIALLY OF NICKEL, AND HAVING A TEXTURE AND POROUSITY CORRESPONDING SUBSTANTIALLY TO THE INITIAL CORE STRUCTURE, AND DEPOSITING THE NICKEL HYDROXIDE MASS IN THE PORES OF THE SAID SUPPORT STRUCTURE.
Claim 2
Independent Claim
154 words
A METHOD FOR MANUFACTURING A POSITIVE NICKEL HYDROXIDE ELECTRODE FOR GALVINIC CELLS COMPRISNG THE STEPS OF PROVIDING A HIGHLY POROUS CORE STRUCTURE OF ORGANIC MATERIAL WITH A FIBROUS OR RETICULAR TEXTURE HAVING LARGE SURFACE WITH A DOUBLE COATING BY SUCCESSITIVELY SPRAYING MOLTEN ZINC AND NICKEL ONTO THE SAID CORE STRUCTURE SO AS TO COVER SAID STRUCTURE UNIFORMLY FIRST WHEN A PROTECTIVE COATING OF ZINC THEN WITH AN OUTER COATING OF NICKEL, WHILE SUBSTANTIALLY RETAINING THE INITIAL TEXTURE AND POROSITY OF SAID CORE STRUCTURE, SUBJECTING THE RESULTING COATED STRUCTURE TO A THERMAL TREATMENT WHICH PROVIDES SINTERING OF THE SAID NICKEL COATING, REMOVAL OF THE ORGANIC CORE MATERIAL AND EVAPORATION OF THE ZINC, SO AS TO THERBY PRODUCE A STRONGLY CONSOLIDATED HIGHLY POROUS SUPPORT STRUCTURE CONSISTING SUBSTANTIALLY OF NICKEL, AND HAVING A TEXTURE AND POROUSITY CORRESPONDING SUBSTANTIALLY TO THE INITIAL CORE STRUCTURE, AND DEPOSITING THE NICKEL HYDROXIDE MASS IN THE PORES OF THE SAID SUPPORT STRUCTURE.
Claim 3
Dependent Claim
85 words
The method according to claim 1, wherein the thermal treatment is carried out in two consecutive steps, whereby the metallized core structure is first briefly heated in air to a temperature above 700*C in a first step, so that the organic core material undergoes pyrolysis and combustion, and is thereafter heated in a second step in a reducing atmosphere to a temperature of about 950*C, so as to evaporate the zinc of the protective coating whereby to provide the coherent electrode structure of metallic nickel.
Claim 4
Dependent Claim
40 words
The method according to claim 1, wherein the active mass is deposited electrochemically in the pores of the support structure by subjecting said structure to cathodic polarization in a nickel nitrate bath with a pH value of 5 to 7.
Claim 5
Dependent Claim
45 words
The method according to claim 1, wherein the active mass is formed in the pores of the support structure by impregnation thereof with a nickel salt solution, drying and treatment thereof with an alkaline solution, so that the nickel salt is converted into nickel hydroxide.
Claim 6
Dependent Claim
25 words
The method according to claim 1, wherein nickel hydroxide particles in suspension are introduced and deposited in the pores of the support structure by filtering.
Claim 7
Dependent Claim
23 words
The method according to claim 5, wherein nickel hydroxide in suspension is introduced into the pores of the support structure while applying ultra-sound.
Claim 8
Dependent Claim
20 words
The method according to claim 1, wherein nickel hydroxide is introduced into the pores of the support structure by electrophoresis.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |