US3615858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery comprising positive electrode composed of principal and secondary active material wherein sole electronic path is through the secondary active material
Assignee: ESB Inc
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Filing: 1965-04-06
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Granted: 1971-10-26
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Expires: 1985-04-06
Abstract
Abstract A battery electrode composed of a principal active material and a secondary active material and a method of discharging the same so as to achieve the discharge potential characteristic of the secondary active material wherein the sole electronic path for discharge of the principal active material is through the secondary active material. The discharge product of the secondary active material must be readily oxidized by the principal active material.
Inventors
- 👤 Luis Soto-Krebs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:35
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/34; H01M4/06; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
228 words
In a battery having a positive electrode, a negative electrode, and an electrolyte, the improvement comprising a positive electrode having a principal active material which is potassium permanganate, a secondary active material which is an oxide selected from the group consisting of cupric oxide and monovalent silver oxide, and an electrical contact means, said two active materials being geometrically arranged in such a manner that said secondary active material is interposed between said principal active material and said electrical contact means as a continuous layer in physical and electrical contact with said principal active material physically isolating principal active material from said contact means, said secondary active material having a lower potential than said principal active material and a discharge product which in the presence of the electrolyte is oxidized by said principal active material to form a secondary active material adjacent to the interface with said principal active material, said oxidation reaction proceeding at a higher rate than the reaction between the principal active material and the negative electrode, said electrode being sufficiently porous to permit electrolyte to be present at the site of said reaction between said principal active material and the discharge product of said secondary active material, said battery having an output voltage throughout discharge of said two active materials characteristic of the couple formed by said secondary active material and said negative electrode.
Claim 2
Dependent Claim
188 words
In a battery having a positive electrode, a negative electrode, and an electrolyte, the improvement comprising a positive electrode housed in a cathode cup the principal active material of which consists of divalent silver oxide and the remaining active material of which consists of a continuous layer of monovalent silver oxide in physical and electrical contact with said divalent silver oxide, said layer of monovalent silver oxide physically isolating said divalent silver oxide from contact with said cathode cup, said layer of monovalent silver oxide being disposed against the inner surface of said cathode cup which inner surface is wet by said electrolyte and consists of a metal capable of being oxidized by said divalent silver oxide in the presence of said electrolyte, said layer of monovalent silver oxide being formed on said divalent silver oxide as a result of said divalent silver oxide being disposed against the inner surface of said cathode cup, which inner surface consists of a layer of a metal selected from the group consisting of zinc and copper, and said battery being characterized throughout discharge by a potential characteristic of monovalent silver oxide.
Claim 3
Dependent Claim
205 words
In a battery having a positive electrode, a negative electrode and an electrolyte, the improvement comprising a positive electrode having an eLectrical contact means housing a principal active material which consists essentially of a first metallic oxide and a secondary active material which consists essentially of a continuous layer of a second metallic oxide in physical and electrical contact with said first metallic oxide, said layer of second metallic oxide physically isolating said first metallic oxide from said contact means which comprises the sole electronic contact with said active materials, said layer of second metallic oxide being disposed against the inner surface of said contact means which inner surface is wet by said electrolyte and consists of a metal different from the metal of said first metallic oxide, the metal of said inner surface being capable of being oxidized by said first metallic oxide in the presence of said electrolyte, said layer of said second metallic oxide being formed on said first metallic oxide as a result of said first metallic oxide being disposed against the inner surface of said contact means, and said battery being characterized throughout discharge by a potential characteristic of said second metallic oxide and said negative electrode in said electrolyte.
Claim 4
Dependent Claim
26 words
A battery in accordance with claim 4 in which the first metallic oxide is divalent silver oxide and the second metallic oxide is monovalent silver oxide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |