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US 7,682,730 B2Granted
Battery cathode
AssigneeThe Gillette Company
InventorsTerry Copeland, Stuart M. Davis, Tae-Won Lee, Alexander A. Leef, Gary A. Miller, Shuming Zeng
Life of this patent
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Abstract
A cathode having a groove extending about 10 to about 450 microns into a surface of the cathode. The cathode can also be roughened.
Claims12
A method of making a battery, comprising
- providing a housing with a cathode disposed within the housing, the cathode comprising
- an exterior surface aligned substantially parallel to a longitudinal axis and adjacent the housing,
- a longitudinally-extending cavity defined at least in part by an interior surface but not by the exterior surface,
- manganese dioxide between the interior surface and the exterior surface, and
- at least one groove extending about 10 microns to about 450 microns into the interior surface of the cathode;
- and
- inserting a longitudinally-extending separator into the longitudinally-extending cavity adjacent the interior surface of the cathode, wherein a cross-sectional area of the separator, prior to insertion, relative to the longitudinally axis is circular;
- and
- forming an anode in the longitudinally-extending cavity, the separator being between the cathode and the anode.
6 more elements
Dependencies are inferred from the claim text.