Patent US4127705A successfully refreshed from Google Patents.
US4127705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical storage cell
Assignee: BBC Brown Boveri AG Germany
•
Filing: 1977-07-20
•
Granted: 1978-11-28
•
Expires: 1997-07-20
Abstract
Abstract An electrochemical storage cell or battery based on an alkali metal and sulfur having at least one anode chamber and at least one cathode chamber separated from each other by an ion-conducting solid electrolyte, a felt fabric with capillary activity located in the cathode chamber, and an additive lowering the viscosity of the sulfur in the cathode chamber. Preferred additives are selenium, boron and iodine. Lowering the viscosity of the sulfur permits recharging the cell to a greater capacity.
Inventors
- 👤 Wilfried Fischer
- 👤 Herbert Kleinschmager
- 👤 Wilhelm Haar
- 👤 Gert Weddigen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:30
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
In an electrochemical storage cell or battery based on an alkali metal and sulfur having at least one anode chamber and at least one cathode chamber separated from each other by an ion-conducting solid electrolyte, and a felt fabric of a medium with capillary activity contained in the cathode chamber, the improvement which comprises having an additive lowering the viscosity of the sulfur in the cathode chamber and wherein the additive is selenium in an amount of 0.2 to 10 mol % selenium based on the sulfur content.
Claim 2
Dependent Claim
88 words
In an electrochemical storage cell or battery based on an alkali metal and sulfur having at least one anode chamber and at least one cathode chamber separated from each other by an ion-conducting solid electrolyte, and a felt fabric of a medium with capillary activity contained in the cathode chamber, the improvement which comprises having an additive lowering the viscosity of the sulfur in the cathode chamber and wherein the additive is selenium in an amount of 0.2 to 10 mol % selenium based on the sulfur content.
Claim 3
Dependent Claim
28 words
Storage cell according to claim 1, wherein the cathode chamber also contains boron in an amount of 0.1 to 2 mol % boron based on the sulfur content.
Claim 4
Dependent Claim
28 words
Storage cell according to claim 1, wherein the cathode chamber also contains iodine in an amount of 0.2 to 2 mol % iodine based on the sulfur content.
Claim 5
Dependent Claim
16 words
Storage cell according to claim 1, wherein the medium with capillary activity is graphite or carbon.
Claim 6
Dependent Claim
38 words
Storage cell according to claim 4, wherein said felt in the region near the solid electrolyte has pores or cavities which are large as compared to the remaining region of the felt further away from the solid electrolyte.
Claim 7
Dependent Claim
12 words
Storage cell according to claim 1, wherein said alkali metal is sodium.
Claim 8
Dependent Claim
88 words
In an electrochemical storage cell or battery based on an alkali metal and sulfur having at least one anode chamber and at least one cathode chamber separated from each other by an ion-conducting solid electrolyte, and a felt fabric of a medium with capillary activity contained in the cathode chamber, the improvement which comprises having an additive lowering the viscosity of the sulfur in the cathode chamber and wherein the additive is boron in an amount of 0.1 to 2 mol % boron based on the sulfur content.
Claim 9
Dependent Claim
88 words
In an electrochemical storage cell or battery based on an alkali metal and sulfur having at least one anode chamber and at least one cathode chamber separated from each other by an ion-conducting solid electrolyte, and a felt fabric of a medium with capillary activity contained in the cathode chamber, the improvement which comprises having an additive lowering the viscosity of the sulfur in the cathode chamber and wherein the additive is boron in an amount of 0.1 to 2 mol % boron based on the sulfur content.
Claim 10
Dependent Claim
28 words
Storage cell according to claim 7, wherein the cathode chamber also contains iodine in an amount of 0.2 to 2 mol % iodine based on the sulfur content.
Claim 11
Dependent Claim
88 words
In an electrochemical storage cell or battery based on an alkali metal and sulfur having at least one anode chamber and at least one cathode chamber separated from each other by an ion-conducting solid electrolyte, and a felt fabric of a medium with capillary activity contained in the cathode chamber, the improvement which comprises having an additive lowering the viscosity of the sulfur in the cathode chamber and wherein the additive is iodine in an amount of 0.2 to 2 mol % iodine based on the sulfur content.
Claim 12
Dependent Claim
88 words
In an electrochemical storage cell or battery based on an alkali metal and sulfur having at least one anode chamber and at least one cathode chamber separated from each other by an ion-conducting solid electrolyte, and a felt fabric of a medium with capillary activity contained in the cathode chamber, the improvement which comprises having an additive lowering the viscosity of the sulfur in the cathode chamber and wherein the additive is iodine in an amount of 0.2 to 2 mol % iodine based on the sulfur content.
References Cited (Backward Citations)
US3679480A
Cited
US3811943A
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 |