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US 8,617,259 B2Granted
Lithium-iron disulfide cell design
AssigneeEveready Battery Company, Inc.
InventorJack W. Marple
Life of this patent
Estimating the term…
Abstract
The invention relates to electrochemical cells having a jellyroll electrode assembly that includes a lithium-based negative electrode, a positive electrode with a coating comprising greater than about 94 wt. % of iron disulfide.
Claims6
A method of making a lithium-FeS2 battery with at least 4 Wh of capacity on a 1000 mW constant power drain comprising the steps of:
- a. selecting a container having a size appropriate for FR6 batteries:
- b. determining an amount of FeS2 necessary to insure that, when the cell is fully discharged, radial force of expansion is between 50% to 80% of the yield strength of the container when radial expansion forces are at a maximum during discharge of the battery under any conditions;
- c. providing FeS2 in the determined amount to a slurry mixture and coating the slurry mixture onto a metallic foil current collector and drying said coated mixture to form a cathode coating, said cathode coating having greater than 95 wt. % of FeS2 as compared to the total weight of solids in the cathode coating;
- d. forming a jellyroll electrode assembly by winding the coated current collector with a separator and an anode strip consisting essentially of lithium or a lithium alloy;
- e. placing the jellyroll electrode assembly within the cylindrical container and closing the container.
2 more elements
A method of making, a lithium-FeS2 battery with at least 1.950 mAh of capacity on a 1000 mA constant power drain comprising the steps of:
- a. selecting a container having a size appropriate for FR03 batteries;
- b. determining an amount of FeS2 necessary to insure that, when the cell is fully discharged, radial force of expansion is between 50% to 80% of the yield strength of the container when radial expansion forces are at a maximum during discharge of the battery under any conditions;
- c. providing FeS2 in the determined amount to a slurry mixture and coating the slurry mixture onto a metallic foil current collector, said slurry mixture having greater than 95 wt. % of FeS2 as compared to the total weight of solids provided to said slurry mixture;
- d. forming a jellyroll electrode assembly by winding the coated current collector with a separator and an anode strip consisting essentially of lithium or a lithium alloy;
- e. placing the jellyroll electrode assembly within the cylindrical container and closing the container.
2 more elements
Dependencies are inferred from the claim text.