| 摘要 |
PURPOSE:To retard the self-discharge of a battery to improve performance by inserting an electrode body in a battery can, and pouring an alkaline electrolyte in the can to make metal powder which is less noble than hydrogen electrode potential react with the alkaline electrolyte and to form a metal oxide film on the surface of a hydrogen storage alloy. CONSTITUTION:An electrode body is formed with a negative electrode comprising a mixture of hydrogen storage alloy powder and metal powder. which is less noble than hydrogen electrode potential in an alkaline solution and a positive electrode comprising a metal oxide and a separator. The electrode body is inserted into a battery can, and an alkaline electrolyte is poured in the can. The metal which is less noble than hydrogen electrode potential evolves hydrogen gas and is oxidized, and by heat generation, a uniform oxide film is formed on the surface of hydrogen storage alloy. The absorption velocity of oxygen gas generated by the decomposition of the positive electrode is decreased and hydrogen dissociation velocity is decreased, and the self-discharge of a battery is also retarded. |
