| 摘要 |
PURPOSE:To obtain a nickel positive plate whose discharge potential is noble by impregnating a solution mainly comprising nickel salt or cobalt salt in a positive plate or a substrate, and immersing it in a mixed solution of chlorite or peroxydisulfate serving as oxidizing agent and caustic alkali for alkali treatment and oxidizing treatment. CONSTITUTION:100pts. nickel hydroxide powder, 5pts. metallic cobalt powder, and 15pts. carbonyl nickel powder are kneaded with 50pts. 1% methyl cellulose solution. 5pts. epoxy resin latex whose solid content is 50% and its curing agent are added to the kneaded mixture to prepare active material paste. The active material is applied to a perforated nickel plated steel core, dried at 90 deg.C, and immersed in nickel nitrate solution, and then immersed in sp.gr. 1.200 (20 deg.C) sodium hydroxide solution containing 2.0% of sodium chlorite for alkali treatment and oxidizing treatment, and a positive plate is manufactured. This positive plate evolves no oxigen gas from the initial stage of charge, and the battery using this positive plate is free from decrease in electrolyte and electro lyte leakage caused by increase in internal pressure. |
