US4184013A
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Electrochemical storage cell
Assignee: BBC Brown Boveri AG Germany
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Filing: 1978-12-22
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Granted: 1980-01-15
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Expires: 1998-12-22
Abstract
Abstract An electrochemical storage cell or battery with at least one anode filled with a molten alkali metal as the anolyte and at least one cathode chamber filled with a sulfur-containing catholyte substance with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte. To the catholyte substance is added an additive which converts the sulfur chains into an electrically charged state for obtaining electromigration of the sulfur phase. This induces mobilization of the sulfur phase in the cathode chamber and prevents major accumulation of liquid sulfur as an insulator. As a result the cell can be repeatedly recharged with large currents to a greater capacity. Additives are a dienophilic compound or a reaction product of a dienophilic compound and sulfur.
Inventors
- 👤 Gert Weddigen
- 👤 Wilfried Fischer
- 👤 Herbert Kleinschmager
- 👤 Wilhelm Haar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:13
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
88 words
In an electrochemical storage cell or battery with at least one anode chamber containing molten alkali metal as the anolyte and at least one cathode chamber containing a sulfur-containing catholyte substance, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises addition of an additive to the catholyte substance, which additive converts sulfur chains in the catholyte substance into an electrically charged state for obtaining electromigration of the sulfur, wherein the additive is an organic dienophilic compound.
Claim 2
Dependent Claim
88 words
In an electrochemical storage cell or battery with at least one anode chamber containing molten alkali metal as the anolyte and at least one cathode chamber containing a sulfur-containing catholyte substance, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises addition of an additive to the catholyte substance, which additive converts sulfur chains in the catholyte substance into an electrically charged state for obtaining electromigration of the sulfur, wherein the additive is an organic dienophilic compound.
Claim 3
Dependent Claim
39 words
Storage cell according to claim 1, wherein the dienophilic compound has the general formula ##STR9## where R, R', R" and R'" are the same or different members selected from the group consisting of F, Cl, Br, CN and SCN.
Claim 4
Dependent Claim
12 words
Storage cell according to claim 2, wherein the dienophilic compound is tetracyanoethylene.
Claim 5
Dependent Claim
23 words
Storage cell according to claim 1, including the addition of a viscosity-lowering additive which lowers the viscosity of sulfur in the cathode chamber.
Claim 6
Dependent Claim
21 words
Storage cell according to claim 4, wherein the viscosity-lowering additive is selected from the group consisting of boron, phosphorus and iodine.
Claim 7
Dependent Claim
18 words
Storage cell according to claim 5, including the addition of selenium to the sulfur in the cathode chamber.
Claim 8
Dependent Claim
12 words
Storage cell according to claim 4, wherein the viscosity-lowering additive is selenium.
Claim 9
Dependent Claim
28 words
Storage cell according to claim 1, wherein the additive is in an amount of 0.1 to 2 mol % based on the sulfur content in the cathode chamber.
Claim 10
Dependent Claim
93 words
In an electrochemical storage cell or battery with at least one anode chamber containing molten alkali metal as the anolyte and at least one cathode chamber containing a sulfur-containing catholyte substance, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises addition of an additive to the catholyte substance, which additive converts sulfur chains in the catholyte substance into an electrically charged state for obtaining electromigration of the sulfur, wherein the additive is a reaction product of sulfur and a dienophilic compound.
Claim 11
Dependent Claim
93 words
In an electrochemical storage cell or battery with at least one anode chamber containing molten alkali metal as the anolyte and at least one cathode chamber containing a sulfur-containing catholyte substance, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises addition of an additive to the catholyte substance, which additive converts sulfur chains in the catholyte substance into an electrically charged state for obtaining electromigration of the sulfur, wherein the additive is a reaction product of sulfur and a dienophilic compound.
Claim 12
Dependent Claim
49 words
Storage cell according to claim 9, wherein the dienophilic compound has the general formula ##STR10## where R, R', R" and R'" are the same or different members selected from the group consisting of F, Cl, Br, CN and SCN and wherein the reaction product has 3-5 inclusive sulfur atoms.
Claim 13
Dependent Claim
15 words
Storage cell according to claim 10, wherein the reaction product has 3-4 inclusive sulfur atoms.
Claim 14
Dependent Claim
12 words
Storage cell according to claim 10, wherein the dienophilic compound is tetracyanoethylene.
Claim 15
Dependent Claim
23 words
Storage cell according to claim 9, including the addition of a viscosity-lowering additive which lowers the viscosity of sulfur in the cathode chamber.
Claim 16
Dependent Claim
21 words
Storage cell according to claim 13, wherein the viscosity-lowering additive is selected from the group consisting of boron, phosphorus and iodine.
Claim 17
Dependent Claim
18 words
Storage cell according to claim 14, including the addition of selenium to the sulfur in the cathode chamber.
Claim 18
Dependent Claim
12 words
Storage cell according to claim 15, wherein the viscosity-lowering additive is selenium.
Claim 19
Dependent Claim
28 words
Storage cell according to claim 9, wherein the additive is in an amount of 0.1 to 2 mol % based of the sulfur content in the cathode chamber.
Claim 20
Dependent Claim
37 words
Reaction products of a dienophilic compound and sulfur having the general formula ##STR11## wherein the two carbon atoms belong to the dienophilic reactant and together with at least one S-atom from the sulfur reactant form a ring.
Claim 21
Dependent Claim
37 words
Reaction products of a dienophilic compound and sulfur having the general formula ##STR11## wherein the two carbon atoms belong to the dienophilic reactant and together with at least one S-atom from the sulfur reactant form a ring.
Claim 22
Dependent Claim
14 words
Reaction products according to claim 18 wherein the number of S-atoms is 3-5 inclusive.
Claim 23
Dependent Claim
42 words
Chemical compounds corresponding to the general formula ##STR12## wherein R, R', R" and R'" are the same or different members selected from the group consisting of F, Cl, Br, CN and SCN, and n is a numeral from 3 to 5 inclusive.
Claim 24
Dependent Claim
42 words
Chemical compounds corresponding to the general formula ##STR12## wherein R, R', R" and R'" are the same or different members selected from the group consisting of F, Cl, Br, CN and SCN, and n is a numeral from 3 to 5 inclusive.
Claim 25
Dependent Claim
16 words
Chemical compound according to claim 20 wherein n is a numeral from 3 to 4 inclusive.
Claim 26
Dependent Claim
8 words
Chemical compound corresponding to the general formula ##STR13##
Claim 27
Dependent Claim
8 words
Chemical compound corresponding to the general formula ##STR13##
Claim 28
Dependent Claim
8 words
Chemical compound corresponding to the general formula ##STR14##
Claim 29
Dependent Claim
8 words
Chemical compound corresponding to the general formula ##STR14##
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) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |