US3773558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric accumulator with beta alumina separator and electrolyte consisting of a salt in an organic solvent
Assignee: Battelle Memorial Institute Inc
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Filing: 1972-03-08
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Granted: 1973-11-20
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Expires: 1992-03-08
Abstract
Abstract The housing of an accumulator cell is divided into an anode compartment and a cathode compartment by a fluidtight separator of beta alumina permselective to ions from an anode which includes a solid phase of alkali or alkaline-earth metal (e.g., sodium) in a liquid phase of an alloy thereof having a solidliquid boundary at an operating temperature up to about 100* C. The cathode compartment contains an electrolyte in the form of a solution of a salt of the solid anode metal in a polar organic solvent, capable of dissolving a virtual reaction product formed during the discharge of the accumulator, together with a cathode in the shape of an electronically conductive sintered structure incorporating a cathodically reducible metal compound such as a fluoride of a transition metal.
Inventors
- 👤 J Charbonnier
- 👤 H Tannenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:38
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/36; H01M10/39; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/40; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
21 words
An accumulator as defined in claim 1 wherein said composition is an alloy with a eutectic melting below said operating temperature.
Claim 2
Dependent Claim
13 words
An accumulator as defined in claim 1 wherein said composition is an amalgam.
Claim 3
Dependent Claim
29 words
An accumulator as defined in claim 1 wherein said composition is an alloy of elements taken from any of Groups IA, IIA, IIB and IIIB of the Periodic Table.
Claim 4
Dependent Claim
20 words
An accumulator as defined in claim 4 wherein said metallic constituent is lithium, sodium, potassium, rubidium, calcium, strontium or barium.
Claim 5
Dependent Claim
17 words
An accumulator as defined in claim 5 wherein said composition is a mixture of sodium and mercury.
Claim 6
Dependent Claim
37 words
An accumulator as defined in claim 5 wherein said composition is a mixture of sodium and potassuim, with the potassium present in a proportion ranging substantially between 40 percent and 90 percent by weight of the mixture.
Claim 7
Dependent Claim
21 words
An accumulator as defined in claim 1 wherein said beta alumina has substantially the composition Na2O.11Al2O3, said metallic constituent being sodium.
Claim 8
Dependent Claim
27 words
An accumulator as defined in claim 1 wherein said reducible metal compound is a halide, an oxide or a sulfide of a transition metal, silver or mercury.
Claim 9
Dependent Claim
15 words
An accumulator as defined in claim 1 wherein said reducible metal compound is a fluoride.
Claim 10
Dependent Claim
17 words
An accumulator as defined in claim 10 wherein said fluorid is FeF2, FeF3, CuF2, NiF2 or CoF3.
Claim 11
Dependent Claim
22 words
An accumulator as defined in claim 1 wherein the salt dissolved in said electrolyte is a chloride, a perchlorite or a hexafluorophosphate.
Claim 12
Dependent Claim
16 words
An accumulator as defined in claim 12 wherein said salt is sodium chloride in saturating concentration.
Claim 13
Dependent Claim
19 words
An accumulator as defined in claim 1 wherein said solvent is dimethylformamide, N,N''-dimethylacetamide, N-methylacetamide, gamma-butyrolactone, tetrahydrofurane or propylene carbonate.
Claim 14
Dependent Claim
18 words
An accumulator as defined in claim 1 wherein said cathode includes an ancillary conductory distributed through-out said structure.
Claim 15
Dependent Claim
24 words
An accumulator as defined in claim 15 wherein said ancillary conductor is a metal corresponding to the metallic component of said reducible metal compound.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |