US4160070A
Expired / Lapsed
US
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Additive for high drain rate lithium cells
Assignee: Spectrum Brands Inc
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Filing: 1978-09-25
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Granted: 1979-07-03
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Expires: 1998-09-25
Abstract
Abstract An improved high drain rate lithium cell is provided. The improvement is the use of an additive to stabilize the cell. The additive is a minor porton of a tetra alkyl onium salt.
Inventors
- 👤 Nehemiah Margalit
- 👤 Philip E. Krouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:21
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/30; H01M6/32; H01M6/34; H01M6/14; H01M6/16; H01M6/162; H01M6/166; H01M6/168; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
44 words
An improvement in a high rate electrochemical cell having a lithium anode, a non-aqueous electrolyte comprised of a solvent and solute and a cathode, the improvement comprising having as an additive a minor portion of a tetra alkyl onium salt dissolved in the electrolyte.
Claim 2
Dependent Claim
44 words
An improvement in a high rate electrochemical cell having a lithium anode, a non-aqueous electrolyte comprised of a solvent and solute and a cathode, the improvement comprising having as an additive a minor portion of a tetra alkyl onium salt dissolved in the electrolyte.
Claim 3
Dependent Claim
44 words
The cell of claim 1 wherein the onium salt has the formula ##STR2## wherein R 1 -R 4 are alkyl groups of four or less carbons, X is ammonium or phosphonium and Z is an onium of an acid compatable with the lithium salt.
Claim 4
Dependent Claim
12 words
The cell of claim 2 wherein R 1 -R 4 is methyl.
Claim 5
Dependent Claim
19 words
The cell of claim 2 wherein Z is tetrafluoroborate, hexafluorophosphate, phosphate, borate, diborate, sulfate, sulfite, sulfide, or trifluoromethyl sulfonate.
Claim 6
Dependent Claim
16 words
The cell of claim 1 wherein the additive is tetramethyl ammonium hexafluorophosphate or tetramethyl ammonium tetrafluoroborate.
Claim 7
Dependent Claim
15 words
The cell of claim 1 wherein the amount of onium salt is 0.01- 0.8 molar.
Claim 8
Dependent Claim
15 words
The cell of claim 1 wherein the amount of onium salt is 0.01- 0.1 molar.
Claim 9
Dependent Claim
16 words
The cell of claim 1 wherein the electrolyte is methylformate, gamma-butyrolactone, 1,2-dimethoxyethane, 1,3-dioxolane or mixtures thereof.
Claim 10
Dependent Claim
10 words
The cell of claim 1 wherein the solvent is methylformate.
Claim 11
Dependent Claim
16 words
The cell of claim 1 wherein the solute is lithium hexafluoroarsenate, lithium trifluoromethylsulfonate or lithium perchlorate.
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) | 1982-07-02 | 1983-01-01 | 1983-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-02 | 1987-01-01 | 1987-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-02 | 1991-01-01 | 1991-07-03 | $7700.00 | Window Closed / Lapsed |