US5154992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolyte for lithium-manganese oxide cells and the like
Assignee: Medtronic Inc
•
Filing: 1990-08-10
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Granted: 1992-10-13
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Expires: 2010-08-10
Abstract
Abstract An improved electrolyte for electrochemical cells including as a cosolvent for the cell electrolyte salt an amount of diglyme; ethyl diglyme; ethyl glyme; triglyme, tetraglyme and higher glymes; dimethoxymethane; 1,2-dimethoxypropane; dimethoxy THF or mixtures thereof.
Inventors
- 👤 David R. Berberick
- 👤 John W. Cretzmeyer
- 👤 Donald R. Merritt
- 👤 Paul M. Skarstad
- 👤 Douglas J. Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:12
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/16; H01M6/162; H01M6/164
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
109 words
In a hermetically sealed non-aqueous electrochemical cell including an active metal anode, a porous solid cathode having a cathode material selected from the group consisting of MnO 2 , silver vanadium oxide, and V 6 O 13 , a separator between the anode and cathode and a liquid electrolyte wetting the separator and in contact with the anode and cathode, wherein the electrolyte comprises a salt of the anode metal dissolved in an organic solvent, the improvement comprising the addition as a cosolvent with the solvent, of a quantity of cosolvent selected from the group consisting of diglyme, ethyl diglyme, ethylglyme, triglyme, tetraglyme, dimethoxymethane, 1,2-dimethoxypropane, 2,5-dimethoxytetrahydrofuran and mixtures thereof.
Claim 2
Dependent Claim
109 words
In a hermetically sealed non-aqueous electrochemical cell including an active metal anode, a porous solid cathode having a cathode material selected from the group consisting of MnO 2 , silver vanadium oxide, and V 6 O 13 , a separator between the anode and cathode and a liquid electrolyte wetting the separator and in contact with the anode and cathode, wherein the electrolyte comprises a salt of the anode metal dissolved in an organic solvent, the improvement comprising the addition as a cosolvent with the solvent, of a quantity of cosolvent selected from the group consisting of diglyme, ethyl diglyme, ethylglyme, triglyme, tetraglyme, dimethoxymethane, 1,2-dimethoxypropane, 2,5-dimethoxytetrahydrofuran and mixtures thereof.
Claim 3
Dependent Claim
19 words
The cell of claim 1 in which the solvent/cosolvent is a diglyme/ethyl diglyme mixture or an ethyl diglyme/diglyme mixture.
Claim 4
Dependent Claim
11 words
The cell of claim 1 in which the anode comprises lithium.
Claim 5
Dependent Claim
12 words
The cell of claim 3 in which the solvent is propylene carbonate.
Claim 6
Dependent Claim
12 words
The cell of claim 4 in which the salt is lithium perchlorate.
Claim 7
Dependent Claim
30 words
The cell of claim 1 in which the relative amounts of cosolvent and solvent by weight percentage range from about 10% cosolvent, balance solvent, to about 75% cosolvent, balance solvent.
Claim 8
Dependent Claim
11 words
The cell of claim 1 in which the cosolvent comprises diglyme.
Claim 9
Dependent Claim
12 words
The cell of claim 1 in which the cosolvent comprises ethyl diglyme.
Claim 10
Dependent Claim
28 words
The cell of claim 1 in which the anode comprises lithium, the cathode comprises manganese dioxide, the electrolyte salt comprises lithium perchlorate and the solvent comprises propylene carbonate.
Claim 11
Dependent Claim
14 words
The cell of claim 1 in which the cathode also comprises CF x .
Claim 12
Dependent Claim
31 words
The cell of claim 1 in which the cathode comprises a hybrid including CF x , MnO 2 , V 6 O 13 , Ag 2 V 4 O 11 .
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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) | 1995-10-13 | 1996-04-13 | 1996-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-13 | 2000-04-13 | 2000-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-13 | 2004-04-13 | 2004-10-13 | $7700.00 | Window Closed / Lapsed |