US4130696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conductive diluent for pressed nickel electrodes
Assignee: Whittaker Technical Products Inc
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Filing: 1976-09-09
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Granted: 1978-12-19
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Expires: 1996-09-09
Abstract
Abstract The conductive diluent is a combination of powdered carbon (preferably graphite) and nickel flakes. It is admixed with the active electrode material and a binder in the pressed nickel electrode so that the diluent is substantially homogeneously mixed with the active electrode material and is mixed in proportions (by weight) sufficient to provide between about 4% to about 10% of nickel flake and between about 5% to about 10% of powdered carbon within a preferred total conductive diluent range of 10-15%, with the remainder of the nickel electrode admixture essentially comprising active electrode material with a small amount of binder.
Inventors
- 👤 Ronald G. Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:31
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/624; H01M4/24; H01M4/32; H01M4/36; H01M4/48; H01M4/52; H01M4/625; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
114 words
In a pressed nickel electrode comprising an apertured current collector, and an electrode admixture pressed therein, said electrode admixture comprising an active nickel-containing electrode material, a conductive diluent and a binder, the improvement which comprises: having as said an conductive diluent admixture homogeneously mixed with said active electrode material and said binder, and consisting essentially of nickel flake and powdered carbon in amounts between about 4% and about 10% by weight and between about 5% and about 10% by weight, respectively, of the total weight of said active electrode material, said conductive diluent admixture, and said binder, said conductive diluent admixture being between about 10% and about 15% by weight of said total weight.
Claim 2
Dependent Claim
114 words
In a pressed nickel electrode comprising an apertured current collector, and an electrode admixture pressed therein, said electrode admixture comprising an active nickel-containing electrode material, a conductive diluent and a binder, the improvement which comprises: having as said an conductive diluent admixture homogeneously mixed with said active electrode material and said binder, and consisting essentially of nickel flake and powdered carbon in amounts between about 4% and about 10% by weight and between about 5% and about 10% by weight, respectively, of the total weight of said active electrode material, said conductive diluent admixture, and said binder, said conductive diluent admixture being between about 10% and about 15% by weight of said total weight.
Claim 3
Dependent Claim
21 words
The improvement of claim 1 wherein said carbon is a material selected from the group consisting of amorphous carbon and graphite.
Claim 4
Dependent Claim
43 words
The improvement of claim 1 wherein said nickel flake is about 1.1-1.5 mm square by about 0.9-1.3μm thick and wherein each of said nickel flake and said powdered carbon is present in amounts between about 5% and about 7% of said total weight.
Claim 5
Dependent Claim
23 words
The improvement of claim 3 wherein the amount of said powdered carbon is at least equal to the amount of said nickel flake.
Claim 6
Dependent Claim
87 words
The improvement of claim 1 wherein said nickel flake has an area defined by sieve sizes +20μm,-44μm and has a thickness of about 0.5μm and wherein said nickel flake is present in amounts between about 7% and about 10% by weight of said total weight, said powdered carbon is present in amounts between about 5% and about 8% by weight of said total weight, and the combined weight of said nickel flake and said powdered carbon is between about 12% and about 15% of said total weight.
Claim 7
Dependent Claim
93 words
A pressed nickel electrode comprising: an apertured current collector; and homogeneous electrode admixture pressed into said apertured current collector and comprising an active electrode material, a binder, and a conductive diluent admixture consisting essentially of nickel flake and powdered carbon in amounts between about 4% and about 10% by weight and between about 5% and about 10% by weight, respectively, of the total weight of said active electrode material, said conductive diluent admixture, and said binder, said conductive diluent admixture being between about 10% and about 15% by weight of said total weight.
Claim 8
Dependent Claim
93 words
A pressed nickel electrode comprising: an apertured current collector; and homogeneous electrode admixture pressed into said apertured current collector and comprising an active electrode material, a binder, and a conductive diluent admixture consisting essentially of nickel flake and powdered carbon in amounts between about 4% and about 10% by weight and between about 5% and about 10% by weight, respectively, of the total weight of said active electrode material, said conductive diluent admixture, and said binder, said conductive diluent admixture being between about 10% and about 15% by weight of said total weight.
Claim 9
Dependent Claim
19 words
The electrode of claim 6 wherein said carbon is selected from the group consisting of amorphous carbon and graphite.
Claim 10
Dependent Claim
47 words
The electrode of claim 6 wherein said powdered carbon is graphite, said nickel flake is about 1.1-1.5 mm square by about 0.9-1.3μm thick and wherein each of said nickel flake and said graphite is present in amounts between about 5% and about 7% of said total weight.
Claim 11
Dependent Claim
22 words
The electrode of claim 8 wherein the amount of said graphite is at least equal to the amount of said nickel flake.
Claim 12
Dependent Claim
91 words
The electrode of claim 6 wherein said powdered carbon is graphite, said nickel flake has an area defined by sieve sizes +20μm,-44μm and has a thickness of about 0.5μm, and said nickel flake is present in amounts between about 7% and about 10% by weight of said total weight, said powdered carbon is present in amounts between about 5% and about 8% by weight of said total weight, and the combined weight of said nickel flake and said powdered carbon is between about 12% and about 15% of said total weight.
Claim 13
Dependent Claim
20 words
The electrode of claim 6 wherein said binder is present in an amount sufficient to produce a unitary, cohesive electrode.
Claim 14
Dependent Claim
47 words
The electrode of claim 11 wherein said binder is present in an amount between about 1.5% and about 10% by weight of said total weight and said active electrode material is present in an amount between about 80% and about 88% by weight of said total weight.
Claim 15
Dependent Claim
32 words
The electrode of claim 6 wherein said active electrode is a nickel-containing material selected from the group consisting of nickel hydroxide and the berthollide NiO x where x is not an integer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-18 | 1982-06-19 | 1982-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-18 | 1986-06-19 | 1986-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-18 | 1990-06-19 | 1990-12-19 | $7700.00 | Window Closed / Lapsed |