| 摘要 |
PURPOSE:To improve the gas oxide absorptive power by a method, in which paste made of cadmium oxide is applied to a core body while being given forming treatment by electrolyzing in an alkaline electrolyte followed by forming a conductive layer made of carbon powder on the surface of an active material layer. CONSTITUTION:A pole plate having an active material layer, in which the paste mainly made up of cadmium oxide is applied to a conductive core body, is given forming treatment by electrolyzing in an alkaline electrolyte for generating metal cadmium as a reserve charging amount and performing washing and drying followed by forming a conductive layer made of carbon powder on the surface of the active material layer in order to make a cadmium negative plate of the paste type. Accordingly, metal cadmium can be preferentially separated out in the whole neighborhood of the plate surface while leaving cadmium hydroxide in an uncharged state inside the active material layer so as to enable to suppress gas pressure inside a battery inside of repeated charge and discharge by improving the oxygen gas absorptive power. |
