| 摘要 |
PURPOSE:To prevent conversion of cobalt hydroxide into inactive cobalt oxyhydroxide by treating cobalt hydroxide deposited on the active material of a nickel electrode plate under a specified condition. CONSTITUTION:A nickel electrode plate filled with Ni(OH)2 is immersed in cobalt salt solution, then the cobalt salt is converted into Co(OH)2. Physical or chemical change of the Co(OH)2 is retarded until Co(OH)2 is anodically oxidized. The retardation is conducted in such a way that after Co(OH)2 is attached on the plate by alkali treatment, the plate is dried and stored in an inactive atmosphere, then formation is performed, or it is dried, then formation is immediately performed. By this treatment, the surface of Ni(OH)2 paticle is covered with active beta-CoOOH. The utilization of the active material is uniformly increased and the dispersion of the capacity is decreased. |
