Back to results
US 6,589,299 B2Granted
Method for making electrode
Assignee3M Innovative Properties Company
InventorsJeffrey J. Missling, Brian C. Eastin, Tony B. Hollobaugh, Katherine A. Graham
Life of this patent
Estimating the term…
Abstract
Described are methods of making electrodes for electrochemical systems, especially cathodes for lithium polymer batteries, and products prepared from the methods; the methods involve the use of a reciprocating extruder, the extrusion of essentially solvent-free systems, or both.
Claims36
A method for combining electrode components comprising:
- an active material,
- an ionically-conductive polymer,
- an electrolyte salt,
- and no added solvent,
- the method comprising processing the electrode components using a reciprocating single screw extruder.
2 more elements
A method for combining electrode components comprising:
- an active material,
- an ionically-conductive polymer,
- an electrolyte salt,
- wherein the method comprises processing the electrode components using a reciprocating single screw extruder and
- wherein an ionically-conductive polymer salt complex material is processed in a molten state.
2 more elements
A method of producing a battery cathode, the method comprising processing a mixture of ingredients comprising:
- greater than about 50 weight percent active material,
- from about 1 to about 10 weight percent electrically-conductive material comprising carbon black, graphite, or a combination thereof,
- from about 10 to about 40 weight percent polymer comprising ionically-conductive polyalkylenoxide polymer,
- from about 3 to about 15 weight percent fluorinated lithium salt, wherein the mixture includes a total of less than about 0.5 percent by weight solvent, the method comprising using a reciprocating extruder and processing an ionically-conductive polymer salt complex in a molten state.
1 more element
A method for combining electrode components comprising:
- ionically-conductive polymer, electrolyte salt,
- the method comprising processing electrolyte components using a reciprocating single screw extruder,
- wherein ionically-conductive polymer is fed to the extruder downstream from electrolyte salt.
Dependencies are inferred from the claim text.