EP0084381A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Lithium batteries with organic slurry cathodes
Assignee: Polaroid Corp
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Filing: 1983-01-20
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Granted: —
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Expires: 2003-01-20
Abstract
Abstract Electrical cells and batteries having lithium anodes and cathodes comprising an organic slurry of Mn0 2 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 Mn0 2 to remove absorbed and adsorbed water and water of crystallization, cooling the dehydrated Mn0 2 , dispersing the cooled and dehydrated Mn0 2 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
EP
Data Source
google_patents
Last Synchronized
2026-10-28 17:26
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: 9
Claim 1
Independent Claim
79 words
-1. A laminar electrical cell having a cathode, an anode and an electrolyte permeable separator between said cathode and said anode; CHARACTERIZED IN THAT said cathode (29) consists essentially of a slurry of MnO 2 and carbon particles in a - solution of lithium salt in an organic solvent, said slurry being between and in contact with said separator (27), and said anode comprises a thin sheet of lithium (2a) in contact with the opposite side of said separator.
Claim 2
Dependent Claim
15 words
A cell according to Claim 1 characterized in that said organic solvent is substantially anhydrous.
Claim 3
Dependent Claim
16 words
A cell according to any previous claim characterized in that said organic solvent comprises propylene carbonate.
Claim 4
Dependent Claim
44 words
A cell according to any previous claim characterized in that said organic solvent consists essentially of from 30 to 100 parts by weight of propylene carbonate and from 0 to 70 parts by weight of 1,2 dimethoxyethane per 100 parts by weight of solvent.
Claim 5
Dependent Claim
20 words
A cell according to any previous claim characterized in that said lithium salt is LiAsF 6 or LiClO 4 .
Claim 6
Dependent Claim
16 words
A battery characterized in that it contains at least one cell according to any preceeding claim.
Claim 7
Dependent Claim
24 words
. A battery according to Claim 6 characterized by means forming a flexible electrolyte impermeable seal around and enclosing said anode, cathode and separator.
Claim 8
Independent Claim
60 words
The method of making a cathode for a cell or a battery according to any previous claim comprising the steps of dispersing MnO 2 and carbon black in a substantially anhydrous solution of a lithium salt in an organic solvent to form a slurry, and depositing a quantity of said slurry on the surface of a flat electrolyte permeable separator.
Claim 9
Independent Claim
104 words
The method of making a lithium cell or battery according to any of previous claims 1 through 7, comprising the steps of dewatering MnO 2 by heat treatment, mixing the dewatered MnO 2 and carbon black with a substantially anhydrous solution of a lithium salt in an organic solvent to form a slurry, 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.
References Cited (Backward Citations)
No citation records indexed.
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