| 摘要 |
PURPOSE:To enable easy pressing to the predetermined thickness and prevent the drop of an active material during charging and discharging by filling an active material powder containing beta-NiOOH in a conductive porous body, and then pressing the body to the predetermined thickness. CONSTITUTION:A conductive porous body after filled with an active material containing beta-NiOOH is pressed to the predetermined thickness. As a result, a volume occupied with the active material when the same weight of the material is filled, drops and the body can be pressed to smaller thickness than conventional accordingly. When the same pressure as conventional is applied for pressing work, a crack and strain do not occur in an electrode made of the aforesaid body and an increase in contact resistance can be prevented. Also, when higher pressure than conventional is applied and, a crack and strain are caused in the electrode, conductivity pertaining to beta-type nickel oxyhydroxide is superior to the conductivity of a nickel hydroxide powder and, therefore, the contact resistance of the electrode rather drops, thereby restraining the formation of gamma-type nickel oxyhydroxide. |
