| 摘要 |
PURPOSE:To accept requirements of the sealing, miniaturization and thinning of a lead accumulator by forming a layer of alpha-PbO2 on the surface of a lead or lead-calcium allay base by electrolysis, and preparing powder of PbO2 to be applied thereto by means of electrodeposition in a lead salt bath containing tin. CONSTITUTION:As a lead base 1, a foil of Pb-Ca allay is used, and an alpha-PbO2 layer 2 is formed by electrolytic oxidation in an alkaline bath containing sodium hydroxide. PbO2 powder necessary for the formation of an active material layer 3 is prepared by electrodeposition in a lead salt bath containing tin. The PbO2 powder prepared by electrodeposition is applied onto the lead base 1 having the alpha-PbO2 layer 2 formed thereon, and roller press and air drying are then conducted to produce up an anode plate. Thus, strong requirements of the sealing, miniaturization and thinning of a lead accumulator can be sufficiently accepted. |
