Patent US4181777A successfully refreshed from Google Patents.
US4181777A
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US
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Rechargeable zinc halogen battery
Assignee: Diamond Shamrock Technologies SA
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Filing: 1978-09-07
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Granted: 1980-01-01
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Expires: 1998-09-07
Abstract
Abstract A rechargeable zinc halogen battery has an aqueous electrolyte containing ions of zinc and halogen and an amount of polysaccharide and/or sorbitol sufficient to prevent zinc dendrite formation during recharging. The electrolyte may also contain trace amounts of metals such as tungsten, molybdenum and lead.
Inventors
- 👤 Placido M. Spaziante
- 👤 Antonio Nidola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:18
CPC Classifications
H; H01; H01M; H01M12/00; H01M12/08; H01M12/085; H01M10/00; H01M10/36; H01M10/365; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
115 words
An improved rechargeable zinc halogen battery comprising a cell having a normally positive electrode for reducing a halogen disposed in electrical contact therewith and a normally negative electrode for oxidizing zinc disposed in electrical contact therewith during electrical discharge of the battery and an aqueous electrolyte containing ions of zinc and halogen and containing 1 to 50 ppm of an ion of at least one metal selected from the group consisting of lead, molybdenum, tungsten, chromium, vanadium, cadmium, copper, germanium, arsenic, antimony, bismuth, selenium and tellurium and an amount of at least one additive of the group consisting of a polysaccharide and sorbitol sufficient to prevent zinc dendrite formation during electrical charge of the battery.
Claim 2
Dependent Claim
115 words
An improved rechargeable zinc halogen battery comprising a cell having a normally positive electrode for reducing a halogen disposed in electrical contact therewith and a normally negative electrode for oxidizing zinc disposed in electrical contact therewith during electrical discharge of the battery and an aqueous electrolyte containing ions of zinc and halogen and containing 1 to 50 ppm of an ion of at least one metal selected from the group consisting of lead, molybdenum, tungsten, chromium, vanadium, cadmium, copper, germanium, arsenic, antimony, bismuth, selenium and tellurium and an amount of at least one additive of the group consisting of a polysaccharide and sorbitol sufficient to prevent zinc dendrite formation during electrical charge of the battery.
Claim 3
Dependent Claim
10 words
The battery of claim 1 wherein the halogen is chlorine.
Claim 4
Dependent Claim
11 words
The battery of claim 1 wherein the additive is a polysaccharide.
Claim 5
Dependent Claim
10 words
The battery of claim 3 wherein the polysaccharide is agar-agar.
Claim 6
Dependent Claim
15 words
The battery of claim 1 wherein the amount of polysaccharide is 500 to 1000 ppm.
Claim 7
Dependent Claim
10 words
The battery of claim 1 wherein the additive is sorbitol.
Claim 8
Dependent Claim
15 words
The battery of claim 6 wherein the amount of sorbitol is 500 to 1000 ppm.
Claim 9
Dependent Claim
16 words
The battery of claim 1 wherein the electrolyte contains a mixture of a polysaccharide and sorbitol.
Claim 10
Dependent Claim
19 words
The battery of claim 1 wherein the metal is selected from the group consisting of tungsten, molybdenum and lead.
Claim 11
Dependent Claim
71 words
An electrolyte for a rechargeable zinc halogen battery comprising an aqueous solution of zinc and halogen ions containing 50 to 2000 ppm of at least one additive selected from the group consisting of a polysaccharide and sorbitol and containing 1 to 50 ppm of an ion of at least one metal selected from the group consisting of lead, molybdenum, tungsten, chromium, vanadium, cadmium, copper, germanium, arsenic, antimony, bismuth, selenium and tellurium.
Claim 12
Dependent Claim
71 words
An electrolyte for a rechargeable zinc halogen battery comprising an aqueous solution of zinc and halogen ions containing 50 to 2000 ppm of at least one additive selected from the group consisting of a polysaccharide and sorbitol and containing 1 to 50 ppm of an ion of at least one metal selected from the group consisting of lead, molybdenum, tungsten, chromium, vanadium, cadmium, copper, germanium, arsenic, antimony, bismuth, selenium and tellurium.
Claim 13
Dependent Claim
10 words
The electrolyte of claim 10 wherein the halogen is chlorine.
Claim 14
Dependent Claim
11 words
The electrolyte of claim 10 wherein the additive is a polysaccharide.
Claim 15
Dependent Claim
10 words
The electrolyte of claim 12 wherein the polysaccharide is agar.
Claim 16
Dependent Claim
15 words
The electrolyte of claim 13 wherein the amount of agar is 500 to 1000 ppm.
Claim 17
Dependent Claim
10 words
The electrolyte of claim 10 wherein the additive is sorbitol.
Claim 18
Dependent Claim
16 words
The electrolyte of claim 10 wherein the additive is a mixture of a polysaccharide and sorbitol.
Claim 19
Dependent Claim
19 words
The electrolyte of claim 10 wherein the metal is selected from the group consisting of tungsten, molybdenum, and lead.
Claim 20
Dependent Claim
76 words
In a method of operating a rechargeable zinc halogen battery, the improvement comprising adding to the aqueous electrolyte a sufficient amount of at least one additive selected from the group consisting of polysaccharide and sorbitol to prevent zinc dendrite formation during the charging cycle and 1 to 50 ppm of an ion of at least one metal selected from the group consisting of lead, molybdenum, tungsten, chromium, vanadium, cadmium, copper, germanium, arsenic, antimony, bismuth, selenium, tellurium.
Claim 21
Dependent Claim
76 words
In a method of operating a rechargeable zinc halogen battery, the improvement comprising adding to the aqueous electrolyte a sufficient amount of at least one additive selected from the group consisting of polysaccharide and sorbitol to prevent zinc dendrite formation during the charging cycle and 1 to 50 ppm of an ion of at least one metal selected from the group consisting of lead, molybdenum, tungsten, chromium, vanadium, cadmium, copper, germanium, arsenic, antimony, bismuth, selenium, tellurium.
Claim 22
Dependent Claim
10 words
The method of claim 18 wherein the halogen is chlorine.
Claim 23
Dependent Claim
11 words
The method of claim 18 wherein the additive is a polysaccharide.
Claim 24
Dependent Claim
10 words
The method of claim 18 wherein the polysaccharide is agar.
Claim 25
Dependent Claim
15 words
The method of claim 18 wherein the amount of agar is 500 to 1000 ppm.
Claim 26
Dependent Claim
10 words
The method of claim 18 wherein the additive is sorbitol.
Claim 27
Dependent Claim
16 words
The method of claim 18 wherein the additive is a mixture of a polysaccharide and sorbitol.
Claim 28
Dependent Claim
19 words
The method of claim 18 wherein the metal is selected from the group consisting of tungsten, molybdenum and lead.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |