| 摘要 |
PURPOSE:To obtain an electrode base body with which short circuits between a positive and a negative electrode can be suppressed by coating the surface of a slab consisting of an Sn-Ca-system Pb alloy with an Sn-system Pb alloy, then rolling the coated slab before the rolled thin plate is formed into a given shape. CONSTITUTION:The surface of a slab consisting of an Sn-Ca-system Pb alloy is coated with an Sn-system Pb alloy containing a larger percentage of Sn than the slab. The thus treated slab is then rolled into a thin plate which is then subjected to expansion work or punching work, thereby obtaining a porous electrode base body. By using the thus obtained base body, a lead storage battery which has a superior charge-and-cischarge characteristic and in which no short circuits between the positive and the negative electrodes are caused can be constituted with a smaller percentage of tin. |
