US4057679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic electrolyte batteries
Assignee: Duracell Inc USA
•
Filing: 1976-01-02
•
Granted: 1977-11-08
•
Expires: 1996-01-02
Abstract
Abstract Corrosion of the current collectors in cells utilizing vanadium oxides and chromates as cathode materials is prevented by the utilization of metals from Groups IVb, Vb, and VIb of the Periodic Table for fabricating the current collectors and leads in contact with the cathode materials. Ta, Ti, and Mo are preferred materials. Cells containing such structures are described as well as an intermediate protective structure.
Inventors
- 👤 Arabinda N. Dey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:17
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/16; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/661; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 words
A high energy density cell comprising an anode electrode of an active light metal selected from the group consisting of lithium, sodium, potassium, magnesium, calcium, beryllium, and aluminum; an electrolyte salt of said light metals; an organic solvent having dissolved therein said electrolyte salt; an active cathode material selected from the group consisting of metal chromates, dichromates, oxides, halides, permanganates, arsenates, periodates, vanadates, persulfates, sulfites and mixtures thereof; and a cathode current collector in direct contact with said active cathode material; said current collector being composed of a material selected from the group consisting of the metals of Groups IVb, Vb, and VIb of the Periodic Table and mixtures thereof.
Claim 2
Dependent Claim
110 words
A high energy density cell comprising an anode electrode of an active light metal selected from the group consisting of lithium, sodium, potassium, magnesium, calcium, beryllium, and aluminum; an electrolyte salt of said light metals; an organic solvent having dissolved therein said electrolyte salt; an active cathode material selected from the group consisting of metal chromates, dichromates, oxides, halides, permanganates, arsenates, periodates, vanadates, persulfates, sulfites and mixtures thereof; and a cathode current collector in direct contact with said active cathode material; said current collector being composed of a material selected from the group consisting of the metals of Groups IVb, Vb, and VIb of the Periodic Table and mixtures thereof.
Claim 3
Dependent Claim
30 words
A cell according to claim 1 wherein said electrolyte salt is selected from the group cnsisting of perchlorate, hexafluorophosphate, tetrafluoroborate, and hexafluoroarsenate salts of said light metals and mixtures thereof.
Claim 4
Dependent Claim
36 words
The cell according to claim 1 wherein said organic solvent is selected from the group consisting of tetrahydrofuran, dimethoxy ethane, methyl formate, acetonitrile, dimethyl carbonate, dimethyl sulfoxide, dimethyl sulfite, dimethyl formamide, gammabutyrolactone, N-nitrosodimethylamine and mixtures thereof.
Claim 5
Dependent Claim
32 words
A cell according to claim 1 wherein said active cathode comprises vanadium pentoxide, or a chromate or dichromate of silver, mercury, copper, lead, iron, cobalt, nickel, thallium, bismuth or a mixture thereof.
Claim 6
Dependent Claim
16 words
A cell according to claim 1 wherein said cathode current collector comprises titanium, tantalum, or molybdenum.
References Cited (Backward Citations)
US3615831A
Cited
US3658592A
Cited
US3870563A
Cited
US3798070A
Cited
US3871915A
Cited
US3880728A
Cited
US3947289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |