US3762954A
Expired / Lapsed
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Process for enhancing the capacity of a carbon electrode
Assignee: Standard Oil Co
•
Filing: 1971-03-22
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Granted: 1973-10-02
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Expires: 1991-03-22
Abstract
Abstract The energy storage capacity of a carbon electrode can be increased by advantageously incorporating additive elements into the electrode by the process of initially heat-treating the carbon electrode at a temperature between 700* and 1,000* C under a partial vacuum; subsequently exposing the electode to the vapors of the desired compound under a slightly positive pressure and at a temperature below about 1,000* C; followed by cycling the electrode alternately in a charge and discharge direction in a cell containing a fused salt electrolyte composed of the halides of alkali metals or alkaline earth metals or their mixtures.
Inventors
- 👤 J Metcalfe
- 👤 R Rightmire
- 👤 A Marse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:55
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/399; H01M4/00; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S148/00; Y10S148/056
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
16 words
The process of claim 1 wherein the electrolyte in step (c) comprises a lithium halide-containing salt.
Claim 2
Dependent Claim
18 words
The process in claim 2 wherein the second electrode consists essentially of an alloy of aluminum and lithium.
Claim 3
Dependent Claim
17 words
The process in claim 3 wherein the electrolyte is a mixture of lithium chloride and potassium chloride.
Claim 4
Dependent Claim
44 words
The process in claim 4 wherein the second electrode is composed of an alloy having the composition 70 to 95 weight percent aluminum and 5 to 30 weight percent lithium and the electrolyte consists of a eutectic mixture of lithium chloride and potassium chloride.
Claim 5
Dependent Claim
15 words
The process in claim 1 wherein the additive in step (b) is a tellurium halide.
Claim 6
Dependent Claim
15 words
The process in claim 1 wherein the additive in step (b) is a tungsten halide.
Claim 7
Dependent Claim
14 words
The process in claim 1 wherein the additive in step (b) is elemental sulfur.
Claim 8
Dependent Claim
17 words
The process in claim 3 wherein the electrolyte is a mixture of lithium bromide and potassium bromide.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |