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US4127634A
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Sulfur/graphite fiber electrode for sodium-sulfur batteries
Assignee: GREAT LAKES CARBON Corp
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Filing: 1978-01-04
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Granted: 1978-11-28
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Expires: 1998-01-04
Abstract
Abstract A sulfur electrode for a sodium-sulfur secondary battery comprises a mixture of chopped graphite fibers and sulfur formed into a solid composite structure.
Inventors
- 👤 Louis A. Joo'
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:04
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/624; H01M4/625; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
A process for producing a formed sulfur-chopped graphite fiber composite sulfur electrode for use in a sodium-sulfur secondary battery comprising, in the order recited, the steps of: (a) forming a mixture comprising about 1 to about 20 wt. % chopped graphite fibers and about 99 to about 80 wt. % powdered sulfur; (b) shaping the mixture at a temperature in the range of about 110°-135° C. under a pressure sufficient to provide required electrode configuration; and (c) cooling the shaped mixture to a temperature below the melting point of the sulfur.
Claim 2
Dependent Claim
91 words
A process for producing a formed sulfur-chopped graphite fiber composite sulfur electrode for use in a sodium-sulfur secondary battery comprising, in the order recited, the steps of: (a) forming a mixture comprising about 1 to about 20 wt. % chopped graphite fibers and about 99 to about 80 wt. % powdered sulfur; (b) shaping the mixture at a temperature in the range of about 110°-135° C. under a pressure sufficient to provide required electrode configuration; and (c) cooling the shaped mixture to a temperature below the melting point of the sulfur.
Claim 3
Dependent Claim
86 words
A process for producing a formed sulfur-chopped graphite fiber composite sulfur electrode for use in a sodium-sulfur secondary battery comprising, in the order recited, the steps of: (a) forming a mixture consisting of about 10 wt. % chopped graphite fibers and about 90 wt. % powdered sulfur; (b) shaping the mixture at a temperature of about 125° C. under a pressure of about 50 p.s.i.g. to provide required electrode configuration; and (c) cooling the shaped mixture to a temperature below the melting point of the sulfur.
Claim 4
Dependent Claim
86 words
A process for producing a formed sulfur-chopped graphite fiber composite sulfur electrode for use in a sodium-sulfur secondary battery comprising, in the order recited, the steps of: (a) forming a mixture consisting of about 10 wt. % chopped graphite fibers and about 90 wt. % powdered sulfur; (b) shaping the mixture at a temperature of about 125° C. under a pressure of about 50 p.s.i.g. to provide required electrode configuration; and (c) cooling the shaped mixture to a temperature below the melting point of the sulfur.
References Cited (Backward Citations)
US3748178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |