Alkaline batteries containing a zinc powder with indium and bismuth
AssigneeGrillo-Werke AG
InventorWolfgang Glaeser
Life of this patent
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Abstract
The zinc powder for alkaline batteries having a residual lead content of less than 30 ppm, an indium content of from 10 to 10,000 ppm, and preferably from 100 to 1,000 ppm, a gallium content of from 0 to 1,000 ppm and a content of alkali and/or alkaline earth metals of up to 1,000 ppm additionally contains from 10 to 10,000 ppm, and preferably from 100 to 1,000 ppm, of bismuth.
Claims11
An alkaline battery, comprising:
- a zinc powder, which is substantially free from mercury, consisting of a lead content of less than 30 ppm, an indium content of 10 to 1,000 ppm and a bismuth content of 10 to 1,000 ppm, balance zinc and trace impurities;
- and
- an alkaline electrolyte, the electrolyte exhibiting low hydrogen gas evolution in the presence of the zinc powder.
The battery of claim 21, wherein the bismuth content in the zinc powder is less than or equal to the indium content.
In an alkaline battery comprising an alkaline electrolyte, the improvement comprising a zinc powder, which is substantially free from mercury, consisting of a lead content of less than 30 ppm, an indium content of 10 to 10,000 ppm and a bismuth content of 10 to 10,000 ppm, balance zinc and trace impurities, the alkaline electrolyte exhibiting low hydrogen gas evolution in the presence of the zinc powder.
Dependencies are inferred from the claim text.