Zinc electrode for alkaline batteries

Details Zinc electrode for alkaline batteries Zinc electrode for alkaline batteries

H - Electricity

01

M

319/83, 319/84

H01M 4/42 (2006.01) H01M 4/66 (2006.01)

Patent

CA 2020938

ZINC ELECTRODE FOR ALKALINE BATTERIES ABSTRACT A negative zinc electrode for use in an alkaline battery has an active material consisting of zinc-magnesium alloy containing magnesium in an amount in the range of greater than 0% to about 15% by weight. The zinc-magnesium alloy may also contain a small amount of an additive metal that reduces the hydrogen overvoltage or an effective amount of an additive metal that increases the porosity, such as from 5 to 25% aluminum by weight of the zinc. The zinc-magnesium alloy is applied in particulate form to a suitable current collector using any one of a number of conventional methods such as die-pressing, mixing with a filler or a polymer and heating, sintering or compaction. The electrode has a cycle life longer than that of a conventional zinc oxide-based electrode, and causes little or no formation of dendrites.

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