US3607407A
Expired / Lapsed
US
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A method of purifying the electrolyte salt employed in an electrochemical cell
Assignee: Standard Oil Co
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Filing: 1969-08-07
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Granted: 1971-09-21
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Expires: 1989-08-07
Abstract
Abstract A process is described for increasing the energy storage capacity and cell like of an electrical energy storage device comprising a porous carbon cathode, a lithium alloy anode and a fused salt electrolyte composed of an alkali metal halide or an alkaline earth metal halide or mixtures thereof, wherein the electrolyte salt is purified electrochemically before use and is subsequently circulated to the electrochemical cell.
Inventors
- 👤 Harry A Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:51
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/399; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
40 words
A method for increasing the electrical energy storage capacity of a molten electrolyte salt electrical energy storage device wherein the electrolyte salt is subjected to the following sequence of treating steps prior to use in said electrical energy storage device:
Claim 2
Independent Claim
40 words
A method for increasing the electrical energy storage capacity of a molten electrolyte salt electrical energy storage device wherein the electrolyte salt is subjected to the following sequence of treating steps prior to use in said electrical energy storage device:
Claim 3
Dependent Claim
60 words
melting the salt resulting from step (1) at a pressure of from about 0.1 to 65 p.s.i. absolute, in a substantially oxygen-free environment, immersing into the molten salt a pair of spaced opposed electrodes comprising a carbon cathode and a lithium alloy anode, and electrolyzing said molten salt at a constant current until a predetermined maximum voltage is achieved; and
Claim 4
Dependent Claim
60 words
melting the salt resulting from step (1) at a pressure of from about 0.1 to 65 p.s.i. absolute, in a substantially oxygen-free environment, immersing into the molten salt a pair of spaced opposed electrodes comprising a carbon cathode and a lithium alloy anode, and electrolyzing said molten salt at a constant current until a predetermined maximum voltage is achieved; and
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein the anode in step (2) consists essentially of an aluminum-lithium alloy.
Claim 6
Dependent Claim
29 words
The method of claim 2 wherein the anode consists essentially of an alloy of 70 to 95 weight percent of aluminum and 5 to 30 weight percent of lithium.
Claim 7
Dependent Claim
8 words
separating any solid material from the molten salt.
Claim 8
Dependent Claim
8 words
separating any solid material from the molten salt.
Claim 9
Dependent Claim
18 words
The method of claim 3 wherein the electrolyte salt is a mixture of lithium chloride and potassium chloride.
Claim 10
Dependent Claim
19 words
The method of claim 4 wherein the electrolyte salt is a eutectic mixture of lithium chloride and potassium chloride.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |