US3909296A
Expired / Lapsed
US
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Solid electrolyte cell
Assignee: Seiko Instruments Inc
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Filing: 1974-11-19
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Granted: 1975-09-30
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Expires: 1994-11-19
Abstract
Abstract This invention relates to an improved Beta -alumina solid electrolyte cell. Cathodic active material for such cells often includes compounds having water of crystallization. It is proposed to dispose in the cathode a hygroscopic substance or material. Any free-water produced at cathode is absorbed by the hygroscopic substance, and the electro-chemical reaction of the cell is not hindered. The coefficient of utilization of the cathodic active material is increased and it is thus possible to manufacture solid electrolyte cells having a large capacity.
Inventors
- 👤 Yuzuru Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:54
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M6/00; H01M6/14; H01M6/18; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
53 words
A SOLID ELECTROLYTE CELL COMPRISING AN ANODIC-ACTIVE MATERIAL, A CATHODIC-ACTIVE MATERAL AND A SOLID ELECTROLYTE, SAID CATHODIC-ACTIVE MATERAL INCLUDING COMPOUNDS HAVING A WATER OF CRYSTALLIZATION WITHIN THE MOLECULE AND HAVING DISPOSED ADJACENT TO SAID CATHODIC ACTIVE MATERIAL A HYGROSCOPIC SUBSTANCE CAPABLE OF ABOSORBING THE WATER OF CRYSTALLIZATION LIBERATED DURING THE DISCHARGE OF SELL.
Claim 2
Dependent Claim
53 words
A SOLID ELECTROLYTE CELL COMPRISING AN ANODIC-ACTIVE MATERIAL, A CATHODIC-ACTIVE MATERAL AND A SOLID ELECTROLYTE, SAID CATHODIC-ACTIVE MATERAL INCLUDING COMPOUNDS HAVING A WATER OF CRYSTALLIZATION WITHIN THE MOLECULE AND HAVING DISPOSED ADJACENT TO SAID CATHODIC ACTIVE MATERIAL A HYGROSCOPIC SUBSTANCE CAPABLE OF ABOSORBING THE WATER OF CRYSTALLIZATION LIBERATED DURING THE DISCHARGE OF SELL.
Claim 3
Dependent Claim
23 words
The solid electrolyte cell according to claim 1 wherein the cathodic active material includes a cupric sulfate salt having a water of crystallization.
Claim 4
Dependent Claim
29 words
The solid electrolyte cell according to claim 2, wherein the cathodic active material is the mixture of powdered cupric sulfate penta-hydrate and graphite in a weight ratio of 70:30.
Claim 5
Dependent Claim
21 words
The solid electrolyte cell according to claim 2, hygroscopic substance is a nonwoven wad or a cloth made from synthetic fibers.
Claim 6
Dependent Claim
19 words
The solid electrolyte cell according to claim 4 wherein said fibers are rayon or polypropylene fibers or blends thereof.
Claim 7
Dependent Claim
22 words
A solid electrolyte cell according to claim 2, wherein the anodic active material is sodium and the solid electrolyte is Beta -alumina.
References Cited (Backward Citations)
US3769089A
Cited
US3736186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |