US4237200A
Expired / Lapsed
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Electrochemical storage cell
Assignee: BBC Brown Boveri AG Germany
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Filing: 1978-12-04
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Granted: 1980-12-02
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Expires: 1998-12-04
Abstract
Abstract Electrochemical storage cell of the alkali metal-and-chalcogen type with at least two spaces (anode and cathode space) separated by an alkali-ion-conducting solid electrolyte for receiving the reactants. The cathode space contains as catholyte at least one chalcogen or chalcogenide in dissolved or melted form, preferably sulfur or sulfides, as well as carbon- or graphite felt as the electrode material. The felt is provided with a layer that is porous, i.e., the surface of its fibers expose, in island-fashion, an alkali-ion-conducting substance which permits improved rechargeability at lower temperatures.
Inventors
- 👤 Gert Weddigen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:51
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
117 words
Electrochemical storage cell with at least one anode chamber containing alkali metal as the anolyte and at least one cathode chamber containing as catholyte at least one chalcogen in dissolved or melted form, as well as carbon- or graphite felt, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises incorporating in the felt a layer of porous felt in which the fibers of the layer of felt has exposed on its surface in island-fashion, an alkali-ion-conducting substance selected from the group consisting of beta-aluminum oxide, boron silicate glass and sodium-zirconium-phosphorus silicate having the formula Na 1-x Zr 2 P 3-x Si x O 12 .
Claim 2
Dependent Claim
117 words
Electrochemical storage cell with at least one anode chamber containing alkali metal as the anolyte and at least one cathode chamber containing as catholyte at least one chalcogen in dissolved or melted form, as well as carbon- or graphite felt, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises incorporating in the felt a layer of porous felt in which the fibers of the layer of felt has exposed on its surface in island-fashion, an alkali-ion-conducting substance selected from the group consisting of beta-aluminum oxide, boron silicate glass and sodium-zirconium-phosphorus silicate having the formula Na 1-x Zr 2 P 3-x Si x O 12 .
Claim 3
Dependent Claim
102 words
Electrochemical storage cell with at least one anode chamber containing alkali metal as the anolyte and at least one cathode chamber containing as catholyte at least one chalcogen in dissolved or melted form, as well as carbon- or graphite felt, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises incorporating in the felt a layer of porous felt in which the fibers of the layer of felt has exposed on its surface in island-fashion, an alkali-ion-conducting substance, wherein a glass layer is interposed between the alkali-ion-conducting substance and the fiber.
Claim 4
Dependent Claim
102 words
Electrochemical storage cell with at least one anode chamber containing alkali metal as the anolyte and at least one cathode chamber containing as catholyte at least one chalcogen in dissolved or melted form, as well as carbon- or graphite felt, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises incorporating in the felt a layer of porous felt in which the fibers of the layer of felt has exposed on its surface in island-fashion, an alkali-ion-conducting substance, wherein a glass layer is interposed between the alkali-ion-conducting substance and the fiber.
Claim 5
Dependent Claim
19 words
Storage cell according to claim 2, wherein the islands have a diameter of about 5 μm to 100 μm.
Claim 6
Dependent Claim
43 words
Storage cell according to claim 2, wherein the alkali-ion-conducting substance contains at least one member selected from the group consisting of beta-aluminum oxide, boron silicate glass and sodium-circonium-phosphorus silicate having the formula Na 1-x Zr 2 P 3-x Si x O 12 .
Claim 7
Dependent Claim
60 words
Storage cell according to claim 2, wherein the substance consists of beta-aluminum oxide and the intermediate layer is a glass with the following composition: SiO 2 --79.7 parts by weight, B 2 O 3 --10.3 parts by weight, Al 2 O 3 --3.1 parts by weight, Na 2 O--5.2 parts by weight, CaO--0.8 parts by weight, MgO--0.9 parts by weight.
Claim 8
Dependent Claim
13 words
Storage cell according to claim 2, wherein the chalcogen is a sulfur-containing substance.
Claim 9
Dependent Claim
107 words
Electrochemical storage cell with at least one anode chamber containing alkali metal as the anolyte and at least one cathode chamber containing as catholyte at least one chalcogen in dissolved or melted form, as well as carbon- or graphite felt, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises incorporating in the felt a layer of porous felt in which the fibers of the layer of felt has exposed on its surface in island-fashion an alkali-ion-conducting substance, wherein zones with coated and uncoated felt bodies alternate in the cathode space perpendicularly to said solid electrolyte.
Claim 10
Dependent Claim
107 words
Electrochemical storage cell with at least one anode chamber containing alkali metal as the anolyte and at least one cathode chamber containing as catholyte at least one chalcogen in dissolved or melted form, as well as carbon- or graphite felt, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises incorporating in the felt a layer of porous felt in which the fibers of the layer of felt has exposed on its surface in island-fashion an alkali-ion-conducting substance, wherein zones with coated and uncoated felt bodies alternate in the cathode space perpendicularly to said solid electrolyte.
Claim 11
Dependent Claim
107 words
Electrochemical storage cell with at least one anode chamber containing alkali metal as the anolyte and at least one cathode chamber containing as catholyte at least one chalcogen in dissolved or melted form, as well as carbon- or graphite felt, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises incorporating in the felt a layer of porous felt in which the fibers of the layer of felt has exposed on its surface in island-fashion an alkali-ion-conducting substance, wherein zones with coated and uncoated felt bodies alternate in the cathode space parallel to said solid electrolyte.
Claim 12
Dependent Claim
107 words
Electrochemical storage cell with at least one anode chamber containing alkali metal as the anolyte and at least one cathode chamber containing as catholyte at least one chalcogen in dissolved or melted form, as well as carbon- or graphite felt, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises incorporating in the felt a layer of porous felt in which the fibers of the layer of felt has exposed on its surface in island-fashion an alkali-ion-conducting substance, wherein zones with coated and uncoated felt bodies alternate in the cathode space parallel to said solid electrolyte.
Claim 13
Dependent Claim
103 words
Electrochemical storage cell with at least one anode chamber containing alkali metal as the anolyte and at least one cathode chamber containing as catholyte at least one chalcogen in dissolved or melted form, as well as carbon- or graphite felt, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises incorporating in the felt a layer of porous felt in which the fibers of the layer of felt has exposed on its surface in island-fashion, an alkali-ion-conducting substance, wherein the alkali-ion-conducting substance is deposited into the felt from a suspension in liquid.
Claim 14
Dependent Claim
103 words
Electrochemical storage cell with at least one anode chamber containing alkali metal as the anolyte and at least one cathode chamber containing as catholyte at least one chalcogen in dissolved or melted form, as well as carbon- or graphite felt, with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte, the improvement which comprises incorporating in the felt a layer of porous felt in which the fibers of the layer of felt has exposed on its surface in island-fashion, an alkali-ion-conducting substance, wherein the alkali-ion-conducting substance is deposited into the felt from a suspension in liquid.
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) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |