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US 8,586,244 B2Granted
Alkaline electrochemical cell having a negative electrode with solid zinc oxide and a surfactant
AssigneeEveready Battery Company, Inc.
InventorsAlex T. Fensore, Jianjun Wu, Katherine E. Ayers
Life of this patent
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Abstract
An alkaline electrochemical cell comprising a negative electrode, wherein the negative electrode includes zinc as an active material and further includes a synergistic combination of a solid zinc oxide and a surfactant. More particularly, the invention discloses an alkaline electrochemical cell that is capable of providing improved service when utilized by high drain devices.
Claims10
A primary alkaline electrochemical cell, comprising:
- a container;
- an electrode assembly disposed within the container and comprising a positive electrode, a negative electrode, a separator located between the positive electrode and the negative electrode, and an alkaline electrolyte, wherein the negative electrode comprises zinc, solid zinc oxide and a surfactant adsorbed on a surface of the solid zinc oxide, wherein the surfactant comprises a water soluble block copolymer, and wherein the block copolymer has at least one anionic functional group and at least one nonionic functional group;
- and
- wherein the zinc is present in an amount from 64 to 68 weight percent based on the total weight of the negative electrode, wherein the solid zinc oxide is present in an amount from 1.5 to 5.0 weight percent based on the total weight of the negative electrode, wherein the solid zinc oxide has a BET surface area greater than 20 m2/g, wherein the solid zinc oxide has a D50 particle size greater than 2 microns, and wherein the surfactant is present in an amount from 0.00064 to 0.20 weight percent based on the total weight of the negative electrode.
1 more element
A primary alkaline electrochemical cell, comprising:
- a container;
- an electrode assembly disposed within the container and comprising a positive electrode comprising manganese dioxide, a negative electrode, a separator located between the positive electrode and the negative electrode, and an alkaline electrolyte, wherein the negative electrode comprises zinc, solid zinc oxide and a surfactant comprising a water soluble block copolymer, and wherein the solid zinc oxide has a BET surface area greater than 20 m2/g;
- and
- wherein the zinc is present in an amount from 64 to 68 weight percent based on the total weight of the negative electrode, wherein the solid zinc oxide is present in an amount from 1.5 to 5.0 weight percent based on the total weight of the negative electrode, wherein the solid zinc oxide has a D50 particle size greater than 2 microns, wherein the surfactant is present in an amount from 0.00064 to 0.20 weight percent based on the total weight of the negative electrode, and wherein the block copolymer has at least one anionic functional group.
1 more element
A primary alkaline electrochemical cell, comprising:
- a container;
- an electrode assembly disposed within the container and comprising a positive electrode comprising manganese dioxide, a negative electrode, a separator located between the positive electrode and the negative electrode, and an alkaline electrolyte, wherein the negative electrode comprises zinc, solid zinc oxide and a surfactant comprising a water soluble block copolymer having at least two different types of functional groups, wherein the zinc is present is an amount from 64 to 68 weight percent, wherein the solid zinc oxide is present in an amount from 1.5 to 5.0 weight percent, and wherein the surfactant is present in an amount from 0.00064 to 0.20 weight percent, wherein all weight percents are based on the total weight of the negative electrode;
- and
- wherein the solid zinc oxide has a BET surface area greater than 20 in2/g and wherein the solid zinc oxide has a D50 particle size greater than 2 microns.
1 more element
Dependencies are inferred from the claim text.