US3615829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel carbon compositions methods of production and use
Assignee: Standard Oil Co
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Filing: 1965-07-12
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Granted: 1971-10-26
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Expires: 1985-07-12
Abstract
Abstract An improved electrode material for electrical energy storage devices is provided by heating a carbonaceous material to provide a charred residue, then treating this charred residue in a fused salt bath under reducing and oxidizing (in the absence of oxygen) conditions. The resulting material contains occluded salts and these may, in a preferred embodiment, be removed.
Inventors
- 👤 James W Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:30
CPC Classifications
H; H01; H01M; H01M4/00; H01G; H01G11/00; H01G11/22; H01G11/30; H01G11/32; H01G11/48; H01G11/84; H01G11/86; H01M4/86; H01M4/96; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/13; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
77 words
An electrical energy storage cell comprising a container for a fused metal salt electrolyte, a fused metal halide salt electrolyte maintained at a temperature ranging from about 350* C. to about 1,000* C. said halide selected from the group consisting of chlorine, bromine and fluorine, means for maintaining said temperature, and a plurality of electrodes immersed in said electrolyte at least one of said electrodes comprising a porous, electrically conductive polymer char body according to claim 1.
Claim 2
Dependent Claim
14 words
A char body as in claim 1 wherein said cationic component includes alkali metal.
Claim 3
Dependent Claim
12 words
A char body as in claim 3 wherein said halogen is chlorine.
Claim 4
Dependent Claim
14 words
A char body as in claim 3 wherein said cationic component is alkali metal.
Claim 5
Dependent Claim
20 words
A chAr body as in claim 5 wherein a plurality of alkali metal cationic components are associated with said char.
Claim 6
Dependent Claim
17 words
A char body as in claim 6 wherein said alkali metal cationic components are sodium and potassium.
Claim 7
Dependent Claim
32 words
A char body as in claim 7 having the following approximate concentration of components: Component Concentration (Wt %) Na 10 to 13 K 18 to 21 Cl 29 to 31 C balance
Claim 8
Dependent Claim
16 words
A char body as in claim 6 wherein said alkali metal components are lithium and potassium.
Claim 9
Dependent Claim
12 words
A char body as in claim 9 wherein said halogen is chlorine.
Claim 10
Dependent Claim
34 words
A char body as in claim 10 having the following approximate concentration of components. Component Concentration (Wt. %) Li 3 to 6 K 25 to 23 C1 25 to 36.3 C 30 to 60
Claim 11
Independent Claim
170 words
A method of making a porous, electrically conductive, carbon polymer char body comprising heating a substantially carbonaceous material at temperatures ranging between about 500* C. and about 1,250* C. to convert said material to a porous polymeric carbon char body having diffuse x-ray diffraction bands and low-crystallite concentration and then in any order electrochemically reducing and electrochemically oxidizing said char body, said oxidation being conducted in a nonoxygen-containing medium, by immersing said body in molten salt of halogen anion selected from the group consisting of chlorine, bromine and fluorine and at least one cation selected from the group consisting of alkali metals, alkaline earth metals, rare earth metals and mixtures thereof, said salt being maintained at temperatures of about 350* C. to about 850* C. and electrically charging said immersed body to at least -2 volts in the negative direction relative to chlorine evolution to effect said reduction and charging said immersed body to at least -0.3 volt in the positive direction relative to chlorine evolution to effect said oxidation.
Claim 12
Dependent Claim
22 words
A method as in claim 12 wherein said salt is comprised of the chloride of a plurality of alkali metals including potassium.
Claim 13
Dependent Claim
24 words
A method as in claim 12 wherein said charging in the negative direction is to from -2 to -3 volts relative to chlorine evolution.
Claim 14
Dependent Claim
20 words
A method as in claim 12 including removing a substantial proportion of said cations by desalting the resulting char body.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |