US4419423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonaqueous cells employing heat-treated MnO2 cathodes and a PC-DME-LiCF3 SO3 electrolyte
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1982-06-02
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Granted: 1983-12-06
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Expires: 2002-06-02
Abstract
Abstract A nonaqueous cell comprising an active metal anode such as lithium, a manganese dioxide-containing cathode which contains less than 1 weight percent water in the manganese dioxide and a liquid organic electrolyte comprising lithium trifluoromethane sulfonate (LiCF 3 SO 3 ) dissolved in propylene carbonate (PC) and dimethoxyethane (DME).
Inventors
- 👤 Violeta Z. Leger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:02
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/16; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
A nonaqueous cell comprising a metal anode selected from the group consisting of lithium, potassium, sodium, calcium, magnesium, aluminum and alloys thereof, a cathode of heat-treated manganese dioxide a conductive agent and a binder, wherein the heat-treated manganese dioxide has a water content of less than 1 weight percent based on the weight of the manganese dioxide and a liquid organic electrolyte comprising lithium trifluoromethane sulfonate dissolved in propylene carbonate and a dimethoxyethane.
Claim 2
Dependent Claim
73 words
A nonaqueous cell comprising a metal anode selected from the group consisting of lithium, potassium, sodium, calcium, magnesium, aluminum and alloys thereof, a cathode of heat-treated manganese dioxide a conductive agent and a binder, wherein the heat-treated manganese dioxide has a water content of less than 1 weight percent based on the weight of the manganese dioxide and a liquid organic electrolyte comprising lithium trifluoromethane sulfonate dissolved in propylene carbonate and a dimethoxyethane.
Claim 3
Dependent Claim
21 words
The nonaqueous cell of claim 1 wherein the volume ratio of propylene carbonate to dimethoxyethane is between about 80:20 and 20:80.
Claim 4
Dependent Claim
18 words
The nonaqueous cell of claim 2 wherein the volume ratio of propylene carbonate to dimethoxyethane is about 50:50.
Claim 5
Dependent Claim
36 words
The nonaqueous cell of claim 1, 2, or 3 wherein the concentration of the lithium trifluoromethane sulfonate in the liquid organic electrolyte varies from about 0.5 molar up to its saturation in the liquid organic electrolyte.
Claim 6
Dependent Claim
26 words
The nonaqueous cell of claim 1, 2, or 3 wherein the concentration of the lithium trifluoromethane sulfonate in the liquid organic electrolyte is about 1 molar.
Claim 7
Dependent Claim
24 words
The nonaqueous cell of claim 2 wherein the water content is less than 0.5 weight percent based on the weight of the managanese dioxide.
Claim 8
Dependent Claim
24 words
The nonaqueous cell of claim 6 wherein the water content is less than 0.2 weight percent based on the weight of the manganese dioxide.
Claim 9
Dependent Claim
24 words
The nonaqueous cell of claim 1 wherein the conductive agent is carbon or graphite and the binder is polytetrafluoroethylene or ethylene carylic acid copolymer.
Claim 10
Dependent Claim
14 words
The nonaqueous cell of claim 1 or 2 wherein said metal anode is lithium.
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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) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |