US4063005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode for molten salt batteries
Assignee: Energy Research and Development Administration ERDA
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Filing: 1976-10-22
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Granted: 1977-12-13
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Expires: 1996-10-22
Abstract
Abstract A molten salt electrochemical system for battery applications comprises tetravalent sulfur as the active cathode material with a molten chloroaluminate solvent comprising a mixture of AlCl 3 and MCl having a molar ratio of AlCl 3 /MCl from greater than 50.0/50.0 to 80/20.
Inventors
- 👤 Gleb Mamantov
- 👤 Roberto Marassi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:13
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/399; H01M4/00; H01M4/02; H01M4/36; H01M4/58; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
73 words
In an electrochemical battery system comprising a partitioned cell having an anode compartment containing an anode and a cathode compartment containing a cathode and a first molten salt mixture comprising AlCl 3 and MCl, M being an alkali metal, the improvement in which said cathode comprises sulfur in the +4 oxidation state and said first molten salt mixture has an AlCl 3 /MCl mole ratio of greater than 50.0/50.0 and up to 80/20.
Claim 2
Dependent Claim
73 words
In an electrochemical battery system comprising a partitioned cell having an anode compartment containing an anode and a cathode compartment containing a cathode and a first molten salt mixture comprising AlCl 3 and MCl, M being an alkali metal, the improvement in which said cathode comprises sulfur in the +4 oxidation state and said first molten salt mixture has an AlCl 3 /MCl mole ratio of greater than 50.0/50.0 and up to 80/20.
Claim 3
Dependent Claim
12 words
The battery system of claim 1 in which said anode comprises aluminum.
Claim 4
Dependent Claim
35 words
The battery system of claim 2 in which said anode compartment contains a second molten salt mixture comprising AlCl 3 and MCl in contact with said anode, said second molten mixture being saturated with MCl.
Claim 5
Dependent Claim
35 words
The battery system of claim 3 in which said anode compartment contains sufficient excess MCl as a solid phase such that the second molten mixture remains saturated with MCl throughout discharge of said battery system.
Claim 6
Dependent Claim
30 words
The battery system of claim 1 in which said cathode compartment is sealed such that gaseous products generated during discharge of said battery system are contained within the cathode compartment.
Claim 7
Dependent Claim
12 words
The battery system of claim 1 in which said anode is sodium.
Claim 8
Dependent Claim
22 words
The battery system of claim 6 in which said anode compartment and said cathode compartment are separated by a porous β-alumina partition.
Claim 9
Dependent Claim
11 words
The battery system of claim 1 in which M is Na.
Claim 10
Dependent Claim
28 words
The battery system of claim 1 in which the AlCl 3 /MCl mole ratio of said first molten salt mixture is within the range of 60/40 to 75/25.
Claim 11
Dependent Claim
20 words
The battery system of claim 1 in which active cathode material consists essentially of sulfur in the +4 oxidation state.
References Cited (Backward Citations)
US3770503A
Cited
US3966491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |