NEGATIVE ELECTRODE ZINC-CAN FOR DRY CELL, ITS MANUFACTURE, AND MANGANESE DRY CELL USING IT

摘要

A negative electrode for dry cells made of a zinc-based alloy containing 0.004-0.800 wt. % of indium and 0.001-0.25 wt. % of titanium or 0.002-0.500 wt. % of zirconium and significantly containing no such harmful matters as mercury, cadmium, and lead. A method of manufacturing the zinc-can negative electrode by which up to 0.800 wt. % of indium can be added to a zinc-based alloy by hot rolling the alloy within a temperature range from 270 DEG C to 370 DEG C. A manganese dry cell in which a separator coated with a paste containing 0.1-8 wt. % of InCl3 is provided on the internal surface of the zinc can. The zinc can is filled with an anode mixture prepared by adding manganese dioxide and a conductive carbon material such as of acetylene black to an electrolyte containing 35-50 wt. % of ZnCl2. A carbon rod is provided at the center of the anode mixture as a current collector.