Patent US4010149A successfully refreshed from Google Patents.
Patent US3706601A successfully refreshed from Google Patents.
US3706601A
Expired / Lapsed
US
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Method of producing an electrode with a polymer binder by rolling
Assignee: McDonnell Douglas Corp
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Filing: 1970-01-28
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Granted: 1972-12-19
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Expires: 1990-01-28
Abstract
Abstract Method for producing a battery electrode, particularly a zinc electrode, of improved strength and stability, and which has a porous cellular structure, by mixing an aqueous dispersion of electrode material such as zinc oxide, with an aqueous dispersion of a latex type polymer such as a fluorocarbon polymer, e.g., polytetrafluoroethylene, casting a film of such mixture, drying the film, sintering the dried film, and rolling such sintered film, to form a fibrous polymer structure binding the particles of electrode material. The resulting sintered and rolled film can be employed per se as an electrode, e.g., a zinc electrode, or such film can be ground and the ground particles then compacted to form an electrode.
Inventors
- 👤 Murray P Strier
- 👤 Joseph S Smatko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:47
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/26; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
154 words
The process as defined in claim 1, said electrode material being zinc oxide and said polymer being polytetrafluoroethylene, including forming said mixture by adding an aqueous emulsion of polytetrafluoroethylene to an aqueous suspension of zinc oxide, said zinc oxide particles having a particle size ranging from about 0.1 to about 10 Mu and said polytetrafluoroethylene having a particle size ranging from about 0.01 to about 10 Mu , said drying being carried out at temperature of about 60* to about 100* C., for a period of from about 2 to about 24 hours, said sintering being carried out at temperature of about 230* to about 375* C. for a period from about 10 minutes to about 2 hours, said film being maintained at temperature ranging from about 200* to about 300* C. during said rolling, and including grinding the sintered and rolled film to a relatively fine mesh particle size prior to said compacting.
Claim 2
Dependent Claim
28 words
The process as defined in claim 1, said latex type polymer selected from the group consisting of fluorocarbon polymers, polyphenylene oxide, polysulfone, rubber polymers, acrylic and vinyl polymers.
Claim 3
Dependent Claim
18 words
The process as defined in claim 1, said electrode material being zinc oxide and said polymer being polytetrafluoroethylene.
Claim 4
Dependent Claim
18 words
The process as defined in claim 1, said electrode material being cadmium oxide and said polymer being polytetrafluoroethylene.
Claim 5
Dependent Claim
42 words
The process as defined in claim 1, said electrode material being zinc oxide and said polymer being a fluorocarbon polymer, said fluorocarbon polymer in said rolled and sintered film being in fibrillar form and said zinc oxide particles being finely dispersed therein.
Claim 6
Dependent Claim
27 words
The process as defined in claim 1, including forming said mixture by mixing an aqueous suspension of said electrode material with an aqueous emulsion of said polymer.
Claim 7
Dependent Claim
20 words
A process as defined in claim 7, employing an aqueous suspension of zinc oxide and an aqueous emulsion of polytetrafluoroethylene.
Claim 8
Dependent Claim
34 words
The process as defined in claim 1, said electrode material selected from the group consisting of zinc oxide, cadmium oxide, nickel oxide, sIlver oxide, mixtures thereof, and mixtures of zinc oxide and lead oxide.
Claim 9
Dependent Claim
42 words
A process as defined in claim 9, said polymer being a fluorocarbon polymer, said mixture of electrode material and polymer containing about 75 to about 99.5 percent electrode material and about 0.5 to about 25 percent polymer, by weight of total solids.
Claim 10
Dependent Claim
31 words
The process as defined in claim 10, said mixture of electrode material and polymer containing about 85 to about 97 percent electrode material and about 3 to about 15 percent polymer.
Claim 11
Dependent Claim
18 words
The process as defined in claim 11, said electrode material being zinc oxide and said polymer being polytetrafluoroethylene.
Claim 12
Dependent Claim
62 words
The process as defined in claim 12, including forming said mixture of electrode material and polymer by adding an aqueous emulsion of polytetrafluoroethylene to an aqueous suspension of zinc oxide, said zinc oxide particles having a particle size ranging from about 0.1 to about 10 Mu and said polytetrafluoroethylene having a particle size ranging from about 0.01 to about 10 Mu .
Claim 13
Dependent Claim
80 words
The process as defined in claim 9, said polymer being a fluorocarbon polymer, said drying being carried out at temperature of about 60* to about 100* C., for a period of from about 2 to about 24 hours, said sintering being carried out at temperature of about 100* to about 375* C. for a period from about 10 minutes to about 2 hours, said film being maintained at temperature ranging from about 20* C. to about 300* during said rolling.
Claim 14
Dependent Claim
42 words
The process as defined in claim 14, said sintering being carried out at a temperature ranging from about 230* to about 375* C., and said film being maintained at a temperature ranging from about 200* to about 300* C. during said rolling.
Claim 15
Dependent Claim
68 words
The process as defined in claim 15, said electrode material being zinc oxide and said polymer being polytetrafluoroethylene, including forming said mixture by adding an aqueous emulsion of polytetrafluoroethylene to an aqueous suspension of zinc oxide, said zinc oxide particles having a particle size ranging from about 0.1 to about 10 Mu and said polytetrafluoroethylene having a particle size ranging from about 0.01 to about 10 Mu .
Claim 16
Dependent Claim
64 words
The process as defined in claim 16, said rolling being carried out employing a 1 1/2 inch to about 2 inch diameter stainless steel rod, over a 25 to about 50 gram quantity of said sintered film, said rod being heated to a temperature substantially the same as the temperature of said film during said rolling, to increase the fibrous characteristics of the polytetrafluoroethylene.
Claim 17
Dependent Claim
49 words
The process as defined in claim 16, wherein said rolling is carried out on a rubber mill, the rolls thereof being heated to a temperature substantially the same as the temperature of said film during said rolling with a roll speed differential of 1:1 to 3:1 between the rolls.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |