| 摘要 |
PURPOSE:To increase the corrosion resistance of a zinc alloy used in a negative electrode and to decrease the amalgamation rate of negative zinc by utilizing a synergetic effect produced by the combination of added elements. CONSTITUTION:A zinc alloy containing 0.01-0.5 wt.% at least one of lead, cadmium, and gallium, 0.01-0.2 wt.% aluminum, and 0.01-0.2 wt.% barium and/or strontium is used as active material. Lead, cadmium, or gallium enhances hydrogen overvoltage. Addition of aluminum makes the particle of atomized zinc powder globular and makes the surface of the particle smooth. This increases the corrosion resistance of zinc powder. By adding strontium or barium together with aluminum, corrosion resistance is further increased. Therefore, a zinc alkaline battery whose amalgamation rate is low but practicality is high can be obtained. |
