| 摘要 |
PURPOSE:To improve the life characteristic of a positive electrode by mixing Pb or a lead oxide containing Pb 10% above into the powder mainly made of PbO2, adding an NaOH aqueous solution and kneading it. CONSTITUTION:Pb and PbO2, which appear on the surface when an oxide layer is broken by kneading, undergo an electrochemical reaction using an alkaline aqueous solution as an electrolyte. HPbO2 is generated, and it is converted into lead sulfate when the electrolyte dilute sulfuric acid of a battery is injected. When it is returned to PbO2 via electrolytic oxidation, it serves as a binder among crystals of PbO2 existing as the main component in a large quantity. The pasty material is strongly alkaline, when it is filled into a substrate made of lead or lead alloy, the surface is severely corroded, and the adhesion of them is improved. The dropping of an active material from an electrode plate is prevented without using a nonconducting binder such as Teflon grains, and the early capacity reduction can be prevented. |
