US4060673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exchange membranes and organic electrolyte cells employing same
Assignee: Duracell Inc USA
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Filing: 1973-09-13
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Granted: 1977-11-29
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Expires: 1993-09-13
Abstract
Abstract Ion exchange membranes adapted for use in organic solvents. The membranes include a substrate providing microporosity and a polyelectrolyte supported thereby and comprised of Na, K, or Li salts of linear polymers having attached functional groups. The disclosure pertains further to organic electric cells which employ the membranes as cell separators. Other features of the invention appear in the specification.
Inventors
- 👤 Arabinda N. Dey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:17
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/16; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/429; H01M2300/00; H01M2300/0017; H01M2300/0025
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
116 words
In an organic electrolyte battery having a light metal anode, a cathode selected from the group consisting of metal halides and sulfur, and an organic electrolyte selected from the group consisting of gamma-butyrolactone, propylene carbonate, tetrahydrofuran, dimethylformamide, dimethylsulfoxide, dimethylcarbonate, acetonitrile, and the mixtures thereof, and containing an electrolyte salt dissolved therein, a microporous permselective barrier means therefor, separating said cathode and said electrolyte, and adapted to prevent diffusion of electrolytic anions, said barrier means comprising an ion-exchange membrane including a microporous substrate and a linear polyelectrolyte without cross-linking, said polyelectrolyte comprising a polymer insoluble in said organic solvent and having attached functional groups, said polyelectrolyte selected from the group consisting of Li, Na, and K polyacrylates.
Claim 2
Dependent Claim
116 words
In an organic electrolyte battery having a light metal anode, a cathode selected from the group consisting of metal halides and sulfur, and an organic electrolyte selected from the group consisting of gamma-butyrolactone, propylene carbonate, tetrahydrofuran, dimethylformamide, dimethylsulfoxide, dimethylcarbonate, acetonitrile, and the mixtures thereof, and containing an electrolyte salt dissolved therein, a microporous permselective barrier means therefor, separating said cathode and said electrolyte, and adapted to prevent diffusion of electrolytic anions, said barrier means comprising an ion-exchange membrane including a microporous substrate and a linear polyelectrolyte without cross-linking, said polyelectrolyte comprising a polymer insoluble in said organic solvent and having attached functional groups, said polyelectrolyte selected from the group consisting of Li, Na, and K polyacrylates.
Claim 3
Dependent Claim
16 words
The organic electrolyte battery of claim 1 wherein said substrate of said ion-exchange membrane is paper.
Claim 4
Dependent Claim
12 words
The organic electrolyte battery of claim 1 wherein said anode is lithium.
Claim 5
Dependent Claim
21 words
The organic electrolyte battery of claim 1 wherein the average minimum molecular weight of said linear polyelectrolyte is 10 4 .
Claim 6
Dependent Claim
119 words
In an organic electrolyte battery having a light metal anode, a cathode selected from the group consisting of metal halides and sulfur, and an organic electrolyte selected from the group consisting of gamma-butyrolactone, propylene carbonate, tetrahydrofuran, dimethylformamide, dimethylsulfoxide, dimethylcarbonate, acetonitrile, and the mixtures thereof, and containing an electrolyte salt dissolved therein, a microporous permselective barrier means therefor, separating said cathode and said electrolyte, and adapted to prevent diffusion of electrolytic anions, said barrier means comprising an ion-exchange membrane including a microporous substrate and a linear polyelectrolyte without cross-linking, said polyelectrolyte comprising a polymer insoluble in said organic solvent and having attached functional groups, said polyelectrolyte selected from the group consisting of Li, Na, and K salts of polystyrene sulfonate.
Claim 7
Dependent Claim
119 words
In an organic electrolyte battery having a light metal anode, a cathode selected from the group consisting of metal halides and sulfur, and an organic electrolyte selected from the group consisting of gamma-butyrolactone, propylene carbonate, tetrahydrofuran, dimethylformamide, dimethylsulfoxide, dimethylcarbonate, acetonitrile, and the mixtures thereof, and containing an electrolyte salt dissolved therein, a microporous permselective barrier means therefor, separating said cathode and said electrolyte, and adapted to prevent diffusion of electrolytic anions, said barrier means comprising an ion-exchange membrane including a microporous substrate and a linear polyelectrolyte without cross-linking, said polyelectrolyte comprising a polymer insoluble in said organic solvent and having attached functional groups, said polyelectrolyte selected from the group consisting of Li, Na, and K salts of polystyrene sulfonate.
Claim 8
Dependent Claim
16 words
The organic electrolyte battery of claim 5 wherein said substrate of said ion-exchange membrane is paper.
Claim 9
Dependent Claim
12 words
The organic electrolyte battery of claim 5 wherein said anode is lithium.
Claim 10
Dependent Claim
21 words
The organic electrolyte battery of claim 5 wherein the average minimum molecular weight of said linear polyelectrolyte is 10 4 .
Claim 11
Dependent Claim
117 words
An organic electrolyte cell comprising a light metal anode; an organic electrolyte selected from the group consisting of gamma-butyrolactone, propylene carbonate, tetrahydrofuran, dimethylformamide, dimethylsulfoxide, dimethylcarbonate, acetonitrile, and the mixtures thereof; a cathode, the active material of which produces in said electrolyte anions whose diffusion causes self-discharge, and a microporous permselective barrier means separating said cathode and said electrolyte and adapted to prevent said diffusion, said barrier means comprising an ion exchange membrane consisting of a microporous substrate and a linear polyelectrolyte without cross-linking, said linear polyelectrolyte consisting of a water-soluble polymer, insoluble in the organic solvent of said electrolyte and having attached functional groups, said polyelectrolyte selected from the group consisting of Li, Na, and K polyacrylates.
Claim 12
Dependent Claim
117 words
An organic electrolyte cell comprising a light metal anode; an organic electrolyte selected from the group consisting of gamma-butyrolactone, propylene carbonate, tetrahydrofuran, dimethylformamide, dimethylsulfoxide, dimethylcarbonate, acetonitrile, and the mixtures thereof; a cathode, the active material of which produces in said electrolyte anions whose diffusion causes self-discharge, and a microporous permselective barrier means separating said cathode and said electrolyte and adapted to prevent said diffusion, said barrier means comprising an ion exchange membrane consisting of a microporous substrate and a linear polyelectrolyte without cross-linking, said linear polyelectrolyte consisting of a water-soluble polymer, insoluble in the organic solvent of said electrolyte and having attached functional groups, said polyelectrolyte selected from the group consisting of Li, Na, and K polyacrylates.
Claim 13
Dependent Claim
17 words
The organic electrolyte battery of claim 9 wherein said substrate of said ion exchange membrane is paper.
Claim 14
Dependent Claim
12 words
The organic electrolyte battery of claim 9 wherein said anode is lithium.
Claim 15
Dependent Claim
21 words
The organic electrolyte battery of claim 9 wherein the average minimum molecular weight of said linear polyelectrolyte is 10 4 .
Claim 16
Dependent Claim
121 words
An organic electrolyte cell comprising a light metal anode; an organic electrolyte selected from the group consisting of gamma-butyrolactone, propylene carbonate, tetrahydrofuran, dimethylformamide, dimethylsulfoxide, dimethylcarbonate, acetonitrile, and the mixtures thereof; a cathode the active material of which produces in said electrolyte anions whose diffusion causes self-discharge, and a microporous permselective barrier means separating said cathode and said electrolyte and adapted to prevent said diffusion, said barrier means comprising an ion exchange membrane consisting of a microporous substrate and a linear polyelectrolyte wtihout cross-linking, said linear polyelectrolyte consisting of a water-soluble polymer, insoluble in the organic solvent of said electrolyte and having attached functional groups, said polyelectrolyte selected from the group consisting of the Li, Na, and K salts of polystyrene sulfonate.
Claim 17
Dependent Claim
121 words
An organic electrolyte cell comprising a light metal anode; an organic electrolyte selected from the group consisting of gamma-butyrolactone, propylene carbonate, tetrahydrofuran, dimethylformamide, dimethylsulfoxide, dimethylcarbonate, acetonitrile, and the mixtures thereof; a cathode the active material of which produces in said electrolyte anions whose diffusion causes self-discharge, and a microporous permselective barrier means separating said cathode and said electrolyte and adapted to prevent said diffusion, said barrier means comprising an ion exchange membrane consisting of a microporous substrate and a linear polyelectrolyte wtihout cross-linking, said linear polyelectrolyte consisting of a water-soluble polymer, insoluble in the organic solvent of said electrolyte and having attached functional groups, said polyelectrolyte selected from the group consisting of the Li, Na, and K salts of polystyrene sulfonate.
Claim 18
Dependent Claim
17 words
The organic electrolyte battery of claim 13 wherein said substrate of said ion exchange membrane is paper.
Claim 19
Dependent Claim
12 words
The organic electrolyte battery of claim 13 wherein said anode is lithium.
Claim 20
Dependent Claim
21 words
The organic electrolyte battery of claim 13 wherein the average minimum molecular weight of said linear polyelectrolyte is 10 4 .
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) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |