US4466470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithium batteries with organic slurry cathodes
Assignee: Polaroid Corp
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Filing: 1982-01-20
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Granted: 1984-08-21
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Expires: 2002-01-20
Abstract
Abstract Electrical cells and batteries having lithium anodes and cathodes comprising an organic slurry of MnO2 and carbon particles in an organic solvent in contact with a conductive plastic current collector, and a method of making the cathodes comprising the steps of heating MnO2 to remove absorbed and adsorbed water and water of crystallization, cooling the dehydrated MnO2, dispersing the cooled and dehydrated MnO2 in an anhydrous solvent to form a slurry, depositing the slurry in discrete cathode patches on cell component substrates, and sealing the slurry patches into cells having substantially gas impervious cell enveloping boundaries.
Inventors
- 👤 Alan H. Bruder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:54
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/42; H01M6/46; H01M6/48; H01M4/00; H01M4/02; H01M4/06; H01M4/08; H01M6/14; H01M6/16; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
The method of making a cathode, comprising the steps of dispersing dewatered MnO 2 and carbon black in a substantially anhydrous solution of a lithium salt in an organic solvent to form a slurry, said slurry being free of any binder material, and depositing a quantity of said slurry on the surface of a flat electrolyte permeable separator.
Claim 2
Independent Claim
58 words
The method of making a cathode, comprising the steps of dispersing dewatered MnO 2 and carbon black in a substantially anhydrous solution of a lithium salt in an organic solvent to form a slurry, said slurry being free of any binder material, and depositing a quantity of said slurry on the surface of a flat electrolyte permeable separator.
Claim 3
Independent Claim
101 words
The method of making a lithium battery comprising the steps of dewatering Mno 2 by heat treatment, mixing said dewatered Mno 2 and carbon black with a substantially anhydrous solution of a lithium salt in an organic solvent to form a slurry, said slurry being free of any binder material, placing a thin flat electrolyte permeable separator in contact with a thin flat sheet of lithium, depositing a quantity of said slurry on said separator on the side of said separator opposite said lithium sheet, and encapsulating said slurry deposit, said separator and said lithium sheet in a solvent impermeable enclosure.
Claim 4
Independent Claim
101 words
The method of making a lithium battery comprising the steps of dewatering Mno 2 by heat treatment, mixing said dewatered Mno 2 and carbon black with a substantially anhydrous solution of a lithium salt in an organic solvent to form a slurry, said slurry being free of any binder material, placing a thin flat electrolyte permeable separator in contact with a thin flat sheet of lithium, depositing a quantity of said slurry on said separator on the side of said separator opposite said lithium sheet, and encapsulating said slurry deposit, said separator and said lithium sheet in a solvent impermeable enclosure.
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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) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |