| 摘要 |
PURPOSE:To reduce the gelation rate of negative electrode zinc thus to achieve low contamination by employing zinc alloy containing specific metal as the negative electrode device substance. CONSTITUTION:Zinc alloy containing 0.01-0.5wt% of nickel, total 0.01-0.5wt% of one or two kind of indium and thalium and total 0.01-0.5wt% of one or two kind of lead and cadmium is employed in the negative electrode of zinc alkaline cell employing alkaline aqueous solution mainly composed of caustic potash, caustic soda, etc. as the electrolyte, zinc as the negative elctrode active substance, maganese dioxide, silver oxide, mercury oxide, oxygen, etc. as the positive electrode active substance. Ni will suppress dispersion of mercury into the crystal powder while Pb, Cd will suppress dispersion into crystal parti cle field and In, Ti will increase the hydrogen over voltage of zinc alloy to uniformize the surface. Consequently, the gelation rate of negative electrode zinc can be reduced resulting in a low contamination zinc alkaline cell. |
