US3811947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical energy storage device utilizing an electrode composed of an amorphous carbon and sulfur-carbon complex
Assignee: Standard Oil Co
•
Filing: 1973-01-22
•
Granted: 1974-05-21
•
Expires: 1993-01-22
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 electrode 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
2026-10-31 16:05
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/399; H01M4/00; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
25 words
The electrical energy storage device of claim 1 wherein the positive electrode (a) is composed of an activated, amorphous carbon and an electrochemically-formed sulfur-carbon complex.
Claim 2
Dependent Claim
30 words
The electrical energy storage device of claim 2 where the positive electrode contains from about 5 to 40 percent by weight of sulfur, based on the weight of the carbon.
Claim 3
Dependent Claim
23 words
The electrical energy storage device of claim 3 wherein the negative electrode in (c) consists essentially of an alloy of lithium and aluminum.
Claim 4
Dependent Claim
16 words
The electrochemical energy storage device of claim 4 wherein the electrolyte comprises a lithium halide-containing salt.
Claim 5
Dependent Claim
47 words
The electrochemical energy storage device of claim 5 wherein the electrolyte consists essentially of a eutectic mixture of lithium chloride and potassium chloride and the negative electrode consists of an alloy having the composition 70 to 95 weight percent aluminum and 5 to 30 weight percent lithium.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |