PURPOSE: To obtain a paste type cadmium negative electrode with high performance by forming an active material layer mainly comprising cadmium oxide and metallic cadmium on a conductive core, and converting part of the cadmium oxide in the coated plate into cadmium hydroxide.
CONSTITUTION: An active material layer mainly comprising cadmium oxide and metallic cadmium is formed on a conductive core, then part of the cadmium oxide in the active material is converted into cadmium hydroxide, and the cadmium hydroxide is uniformly distributed in the active material. When cadmium oxide in the active material is converted into cadmium hydroxide, since volume expansion attendant on the conversion proceeds with pores in the plate filled, filling density of the active material is increased, binding action is increased, and the strength of the plate is heightened. Since the strength is uniformly heightened in the whole plate, a uniform conductive network is formed from the core to the surface of the plate. A paste type cadmium negative electrode with high performance can be obtained.
KAIYA HIDEO
YAMASHITA KATSUMI
