Zinc powder for alkaline batteries

Details Zinc powder for alkaline batteries Zinc powder for alkaline batteries

H - Electricity

01

M

H01M 4/42 (2006.01) C22C 18/00 (2006.01)

Patent

CA 2153330

The present invention relates to an alkaline battery with an anode, a cathode and an electrolyte, the anode containing an aluminium-bearing zinc powder as an active material. This powder is characterized in that it consists of 0.0016-0.0095 wt% aluminium, of one of 0.001-2 wt% bismuth, 0.005-2 wt% indium and 0.003-2 wt% lead, and optionally of 0.003-2% calcium, and for the rest of zinc and the unavoidable impurities present in the aforesaid metals, being excluded - the alkaline batteries wherein the zinc powder contains, besides zinc and unavoidable impurities, only 0.01-0.5 wt% bismuth and 0.005-0.2 wt% in total of at least one of aluminium and calcium, and wherein at the same time the electrolyte contains yttrium hydroxide, prepared by subjecting an yttrium salt as a starting material to a neutralizing treatment in an aqueous solution thereof, in an amount of 0.005- 0.5 wt% based on the zinc powder; and - the alkaline batteries wherein the zinc powder contains indium and 0.005 wt% aluminium, unless this powder contains calcium.

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