| 摘要 |
PURPOSE:To aim at improvement in battery performance as checking a generation rate of hydrogen gas, by using a specific zinc alloy as a negative electrode active material. CONSTITUTION:In this battery, as a negative electrode active material, it uses such a zinc alloy that contains lead of 0.005-0.5wt%, indium of 0.001-0.5wt%, aluminum of 0.005-0.5wt% and a total amount of 0.0001-0.5wt% of one or two kinds to be selected from tellurium and tantalum. And, the zinc alloy is used as it is or after gelatinized. In case of a rate of content of lead, indium and aluminum, and furthermore one or two kinds to be selected from tellurium and tantalum being less than the lower limit, no effect in this invention is secured, and when it exceeds the upper limit, its self-discharge progresses as in zinc containing impurities, so that favorable results for gas generation restraint and discharge capacity are not expected. And, it is desirable that the rate of aluminum content is in the range of 0.005-0.2wt% in particular, therefore when it exceeds the range of 0.2wt%, the content effect is not seen so much. |
