Electrochemical cell with improved high-rate discharge performance
AssigneeEnergizer Brands, LLC
InventorsWeiwei Huang, Frank J. Kerosky
Life of this patent
Estimating the term…
Abstract
An alkaline electrochemical cell has a central cathode having a corresponding cathode current collector electrically connected with a positive terminal of the electrochemical cell. The cathode current collector has a tubular shape, such as a cylindrical shape or rectangular shape, extending parallel with the length of the central cathode. The cathode current collector is embedded within the central cathode, such as at a medial point of a radius of the central cathode, thereby minimizing the distance between the cathode current collector and any portion of the central cathode, thereby increasing the mechanical strength of the cathode and facilitating charge transfer to the cathode current collector.
Claims20
An alkaline electrochemical cell comprising:
- a container;
- an anode positioned within the container and defining an opening therein, wherein the anode comprises a zinc active material;
- an inner cathode positioned within the opening of the anode, wherein the inner cathode comprises a manganese oxide active material;
- wherein the inner cathode is at least substantially rectangular and has an at least substantially uniform composition across an entire width of the inner cathode;
- and
- a cathode current collector comprising a conducting tube positioned within the inner cathode, wherein the cathode current collector is electrically connected with a positive terminal of the electrochemical cell;
- and
- a separator positioned between the anode and the inner cathode.
An alkaline electrochemical cell comprising:
- a container;
- an outer cathode positioned adjacent an interior surface of the container and defining an opening therein, wherein the outer cathode comprises a cathode active material;
- at least one anode portion positioned within the opening of the outer cathode, wherein the at least one anode portion comprises an anode active material;
- an inner cathode positioned adjacent a side of the at least one anode portion, and wherein the inner cathode is at least substantially rectangular and has an at least substantially uniform composition across an entire width of the inner cathode;
- a cathode current collector comprising a conducting tube positioned within the inner cathode, wherein the cathode current collector is electrically connected with a positive terminal of the electrochemical cell;
- and
- a separator material:
- positioned between the outer cathode and the at least one anode portion;
- and
- positioned between the at least one anode portion and the inner cathode.
Dependencies are inferred from the claim text.