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US 6,548,201 B1Granted
Zinc/air cell
AssigneeThe Gillette Company
InventorsDaniel Gibbons, Peter R. Moses, Guang Wei, David Pappas, Rokeya Huq
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AssigneeThe Gillette Company
InventorsDaniel Gibbons, Peter R. Moses, Guang Wei, David Pappas, Rokeya Huq
Estimating the term…
A process for heat treating the metal sheeting forming the anode casing of a zinc/air depolarized cell before anode material comprising zinc is inserted into the anode casing. The anode casing has a layer of copper on its inside surface. The process comprises heat treating the metal sheeting forming the anode casing by passing a gas at a temperature between about 200° C. and 700° C., preferably between about 300° C. and 600° C. in contact therewith to form a heat treated sheeting and then cooling said heat treated sheeting to ambient temperature. The anode casing is stored away from atmospheric air until anode active material is inserted therein during cell assembly. The heat treating process significantly reduces gassing during cell discharge and storage. The cell's capacity and performance is improved when the cell's anode comprises particulate zinc (or zinc alloy) plated with indium, preferably between about 200 and 600 ppm indium. The need to add mercury to the anode material is reduced and can be eliminated.
A zinc/air depolarized cell comprising an anode casing and a cathode casing, an anode material comprising zinc particles within said anode casing, an alkaline electrolyte within said anode casing, and a cathode within said cathode casing, said zinc particles plated with between about 50 and 1000 ppm indium based on the weight of pure zinc,
A zinc/air depolarized cell comprising an anode casing and a cathode casing, said anode casing formed of a metal sheeting, an anode material inserted in the anode casing so that it contacts said sheeting, said anode material comprising zinc particles wherein said zinc particles are plated with indium, an alkaline electrolyte within said anode casing, and a cathode within said cathode casing, wherein said metal sheeting comprises a layer of copper on its inside surface and said zinc is in contact with said copper layer, wherein said copper layer on said sheeting is subjected to heat treating before said anode material is placed in contact therewith, said heat treating comprising:
Dependencies are inferred from the claim text.