摘要 |
PURPOSE:To obtain an overall efficiency of excellent discharge, preservation, and antileakage properties and the like with little environmental pollution, by applying a zinc alloy containing Zn as the main component, and specific ratio of In, Pb, Ga, Mg, Ca, Ba, and Sr as a negative electrode. CONSTITUTION:For a negative electrode 2 of a zinc alkaline type cell, a zinc alloy containing Zn as the main component, 0.001-0.5wt% of In, 0.01-0.5wt% of Pb, 0.001-0.3wt% of Ga, and 0.001-0.2wt% of at least one element of a group of Mg, Ca, Ba, and Sr is used as an active substance. In such a composition, by the synergism of coexistence of In, Pb, and Ga, the surface condition is made even while the hydrogen supervoltage is raised. Furthermore, by adding at least one of Mg, Ca, Ba, and Sr, and surface area of zinc alloy powder is reduced by their compound function improving the anticorrosive preperty, and a zinc alkaline cell of excellent discharge and preservative properties with little environmental pollution can be obtained. |