US4123596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode structure for sodium sulphur cells
Assignee: Chloride Silent Power Ltd
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Filing: 1977-08-02
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Granted: 1978-10-31
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Expires: 1997-08-02
Abstract
Abstract In a sodium sulphur cell having a cathodic region containing sulphur/polysulphides forming a cathodic reactant between a solid electrolyte and a cathode current collector, the electronically conductive matrix containing the cathode reactant is formed of a porous metal structure, preferably metal fibres, coated with graphite or carbon to form an electronically conductive protective coating.
Inventors
- 👤 Graham Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:25
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/661; H01M4/663; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
66 words
In a sodium sulphur cell having a cathodic region containing sulphur/polysulphides forming a cathodic reactant between a solid electrolyte and a cathode current collector, a porous packing in the cathodic region forming an electronic conductor impregnated with the cathodic reactant, which packing is constituted at least partly of a porous metal structure coated with graphite or carbon forming an electronically conductive protective coating over the metal.
Claim 2
Dependent Claim
66 words
In a sodium sulphur cell having a cathodic region containing sulphur/polysulphides forming a cathodic reactant between a solid electrolyte and a cathode current collector, a porous packing in the cathodic region forming an electronic conductor impregnated with the cathodic reactant, which packing is constituted at least partly of a porous metal structure coated with graphite or carbon forming an electronically conductive protective coating over the metal.
Claim 3
Dependent Claim
17 words
A sodium sulphur cell as claimed in claim 1 wherein said porous metal structure comprises metal fibres.
Claim 4
Dependent Claim
84 words
In a sodium sulphur cell having a cathodic region containing sulphur/polysulphides forming a cathodic reactant between a solid electrolyte and a cathode current collector; a porous packing in the cathodic region forming an electronic conductor impregnated with the cathodic reactant, which packing extends between the solid electrolyte and the cathode current collector and is formed at least partly of metal fibres, each fibre having a coating of graphite or carbon over the whole surface of the metal to constitute an electronically conductive protective coating.
Claim 5
Dependent Claim
84 words
In a sodium sulphur cell having a cathodic region containing sulphur/polysulphides forming a cathodic reactant between a solid electrolyte and a cathode current collector; a porous packing in the cathodic region forming an electronic conductor impregnated with the cathodic reactant, which packing extends between the solid electrolyte and the cathode current collector and is formed at least partly of metal fibres, each fibre having a coating of graphite or carbon over the whole surface of the metal to constitute an electronically conductive protective coating.
Claim 6
Dependent Claim
16 words
A sodium sulphur cell as claimed in claim 3 wherein the metal fibres comprise steel wool.
Claim 7
Dependent Claim
19 words
A sodium sulphur cell as claimed in claim 3 wherein the metal fibres comprise fibres of a chromium-containing alloy.
Claim 8
Dependent Claim
18 words
A sodium sulphur cell as claimed in claim 3 wherein the metal fibres comprise fibres of nickel-chromium alloy.
Claim 9
Dependent Claim
19 words
A sodium sulphur cell as claimed in claim 3 wherein the metal fibres comprise fibres of a nickel-chromium-iron alloy.
Claim 10
Dependent Claim
17 words
A sodium sulphur cell as claimed in claim 3 wherein the metal fibres comprise fibres of aluminium.
Claim 11
Dependent Claim
26 words
A sodium sulphur cell as claimed in claim 3 wherein the fibres are packed, as a loose fibre packing, into the cathodic region of the cell.
Claim 12
Dependent Claim
15 words
A sodium sulphur cell as claimed in claim 9 wherein the fibres are randomly oriented.
Claim 13
Dependent Claim
31 words
A sodium sulphur cell as claimed in claim 3 wherein the fibres are in the form of fibres needled into a felt after they have been coated with carbon or graphite.
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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |