US4329404A
Expired / Lapsed
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Rechargeable non-aqueous cells with complex electrolyte salts
Assignee: Duracell Inc USA
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Filing: 1980-09-02
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Granted: 1982-05-11
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Expires: 2000-09-02
Abstract
Abstract A rechargeable non-aqueous electrochemical cell with a complex electrolyte salt such as a complex of an alkali metal salt and an ether.
Inventors
- 👤 William L. Bowden
- 👤 Donald L. Foster
- 👤 Han C. Kuo
- 👤 Peter R. Moses
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/056; H01M10/0561; H01M10/0563; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
54 words
A non-aqueous electrochemical cell comprising an anode, a cathode and an electrolyte solution comprised of an electrolyte salt dissolved in an electrolyte solvent characterized in that said electrolyte salt comprises a metal salt complexed with a stoichiometric amount of an ether and wherein said cell is substantially free of said ether which is uncomplexed.
Claim 2
Dependent Claim
54 words
A non-aqueous electrochemical cell comprising an anode, a cathode and an electrolyte solution comprised of an electrolyte salt dissolved in an electrolyte solvent characterized in that said electrolyte salt comprises a metal salt complexed with a stoichiometric amount of an ether and wherein said cell is substantially free of said ether which is uncomplexed.
Claim 3
Dependent Claim
24 words
The cell of claim 1 wherein said ether is selected from the group consisting of dimethoxyethane; tetrahydrofuran; 1,4 dioxane; 1,3 dioxolane; diglyme and triglyme.
Claim 4
Dependent Claim
30 words
The cell of claim 2 wherein said metal salt is selected from the group consisting of perchlorates, bromides, chlorides, iodides, hexafluoroarsenates, hexafluorophosphates and tetrafluoroborates of alkali and alkaline earth metals.
Claim 5
Dependent Claim
11 words
The cell of claim 3 wherein said alkali metal is lithium.
Claim 6
Dependent Claim
12 words
The cell of claim 4 wherein said anode is comprised of lithium.
Claim 7
Dependent Claim
15 words
The cell of claim 5 wherein said electrolyte solvent consists essentially of SO 2 .
Claim 8
Dependent Claim
51 words
An electrochemical cell comprising a lithium metal anode, a cathode and an electrolyte salt dissolved in a sulfur dioxide electrolyte solvent/cathode depolarizer characterized in that said electrolyte salt comprises a lithium salt complexed with a stoichiometric amount of dimethoxyethane and wherein said cell is substantially free of dimethoxyethane which is uncomplexed.
Claim 9
Dependent Claim
51 words
An electrochemical cell comprising a lithium metal anode, a cathode and an electrolyte salt dissolved in a sulfur dioxide electrolyte solvent/cathode depolarizer characterized in that said electrolyte salt comprises a lithium salt complexed with a stoichiometric amount of dimethoxyethane and wherein said cell is substantially free of dimethoxyethane which is uncomplexed.
Claim 10
Dependent Claim
12 words
The cell of claim 7 wherein said lithium salt is lithium perchlorate.
Claim 11
Independent Claim
70 words
A method for improving the rechargeability of an electrochemical cell having an SO 2 electrolyte solvent/cathode depolarizer comprising the steps of complexing a metal salt with a stoichiometric amount of a complexing material and dissolving said complexed metal salt in said sulfur dioxide solvent, wherein said complexing increases solubility and conductivity of said metal salt within said SO 2 and wherein said cell is substantially free of uncomplexed organic solvents.
Claim 12
Independent Claim
70 words
A method for improving the rechargeability of an electrochemical cell having an SO 2 electrolyte solvent/cathode depolarizer comprising the steps of complexing a metal salt with a stoichiometric amount of a complexing material and dissolving said complexed metal salt in said sulfur dioxide solvent, wherein said complexing increases solubility and conductivity of said metal salt within said SO 2 and wherein said cell is substantially free of uncomplexed organic solvents.
Claim 13
Dependent Claim
12 words
The method of claim 9 wherein said complexing material is an ether.
Claim 14
Dependent Claim
24 words
The method of claim 10 wherein said ether is selected from the group consisting of dimethoxyethane; tetrahydrofuran, 1,4 dioxane; 1,3 dioxolane; diglyme and triglyme.
Claim 15
Dependent Claim
31 words
The method of claim 11 wherein said inorganic metal salt is selected from the group consisting of perchlorates, bromides, chlorides, iodides, hexafluoroarsenates, hexafluorophosphates and tetrafluoroborates of alkali and alkaline earth metals.
Claim 16
Dependent Claim
22 words
The method of claim 12 wherein said cell contains an anode comprised of a metal corresponding to the metal of said salt.
Claim 17
Dependent Claim
10 words
The method of claim 13 wherein said metal is lithium.
Claim 18
Dependent Claim
10 words
The method of claim 14 wherein said ether is dimethoxyethane.
Claim 19
Dependent Claim
11 words
The method of claim 15 wherein said salt is lithium perchlorate.
Claim 20
Dependent Claim
16 words
The cell of claim 3 wherein said metal salt is LiBr and said ether is triglyme.
Claim 21
Dependent Claim
17 words
The cell of claim 3 wherein said metal salt is LiBF 4 and said ether is dimethoxyethane.
Claim 22
Dependent Claim
16 words
The cell of claim 3 wherein said metal salt is LiBr and said ether is dimethoxyethane.
References Cited (Backward Citations)
US3953234A
Cited
US3567515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-10 | 1985-11-09 | 1986-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-10 | 1989-11-09 | 1990-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-10 | 1993-11-09 | 1994-05-11 | $7700.00 | Window Closed / Lapsed |