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US 12,126,014 B2Granted
Alkaline electrochemical cells comprising increased zinc oxide levels
AssigneeEnergizer Brands, LLC
InventorsRobert P. Johnson, Robert E. Ray, Jr., Weiwei Huang, Zhufang Liu, Steven J. Limmer
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Abstract
Alkaline electrochemical cells are provided, wherein dissolved zinc oxide or zinc hydroxide is included at least in the free electrolyte solution, and/or solid zinc oxide or zinc hydroxide is included in the anode, so as to slow formation of a zinc oxide passivation layer on a zinc electrode. Methods for preparing such cells are also provided.
Claims20
A primary alkaline electrochemical cell, comprising:
- a container;
- and
- an electrode assembly disposed within the container and comprising a cathode, an anode,
- a separator located between the cathode and the anode, and a free electrolyte solution;
- wherein the anode comprises 1) solid zinc, 2) solid particulate zinc oxide or solid particulate zinc hydroxide, 3) gelling agent, and 4) aqueous metal hydroxide electrolyte solution;
- wherein the primary alkaline electrochemical cell comprises dissolved zinc oxide or zinc hydroxide;
- and
- wherein the primary alkaline electrochemical cell comprises a total zinc oxide or total zinc hydroxide weight percent of greater than about 2.0%.
5 more elements
Dependencies are inferred from the claim text.