ELECTRODE FOR LEAD STORAGE BATTERY AND ITS MANUFACTURE

摘要

PURPOSE:To improve the capacity restoration of an electrode for a lead storage battery after it is left in an overdischarged state for a long period of time by causing only the surface of the grid to contain a perovskite compound consisting of lead and chromium as well as a perovskite compound consisting of lead and titanium. CONSTITUTION:A positive casted grid of 15g weight made of a lead-calcium-system alloy containing 0.1wt% of calcium is immersed in an aqueous sulfuric acid solution of 1.10 specific gravity containing 10<-1>mol/l of chromium sulfate and an aqueous sulfuric acid solution of 1.10 specific gravity containing 10<-1>mol/l of titanium sulfate to subject the grid to anodic polarization thereby forming a perovskite compound over the surface of the grid. After the anodic polarization is completed, the casted grid is taken out from the aqueous sulfuric acid solution before being washed with water. After that, a paste is packed over the grid thereby forming a plate. A sealed lead storage battery of about 3 AH capacity is obtained by subjecting three pieces of negative plates and two pieces of thus formed unformed plates used as positive plates to formation charging.