| 摘要 |
PURPOSE:To decrease mercury content, retard hydrogen gas evolution, but still keep high discharge performance by adding a specified amount of indium, cadmium, and at least one of silver, gallium,and tellurium to zinc used as a negative active material. CONSTITUTION:Zinc alloy containing 0.01-0.5wt% indium, 0.01-0.5wt% cadmium, and total 0.01-5wt% at least one of silver, gallium, and tellurium is used as a negative active material as it is or after amalgamation. When amalgamation is made, mercury content is decreased to less than 5wt% which is lower than that of usual negative active material. In an air cell having a gas vent or a zinc alkaline battery having a hydrogen absorption means, zinc alloy having 1.0wt% or less mercury or no mercury can be used preferably as a negative active material. |
