| 摘要 |
PURPOSE:To expand a life cycle to a longer period of time by utilizing a zinc pole which is mainly composed of zinc and zinc oxide and additionally contains an oxide of indium and metal indium and an alkaline electrolyte containing indium ion. CONSTITUTION:A mixed powder comprising zinc oxide powder of 75wt%, zinc powder of 10wt% and an additive made of indium oxide of 5wt%, metal indium of 5wt% and fluororesin powder of 5wt% is kneaded by water and rolled into a sheet. Thus obtained sheet-like material is attached to a current collector and is molded under pressure. Thus, the zinc pole 1 can be formed. It is then combined with a nickel pole 2 and an alkaline zinc lead storage battery is formed by utilizing an electrolyte obtained by dissolving indium hydroxide into calium hydroxide solution with concentration of 30%. Accordingly, the indium ion in the electrolyte is precipitated by the electrical decomposition on the surface of zinc pole 1 during the charging process. Thereby, decrease of concentration can be restricted and a life cycle can be extended. |
