| abstract |
PROBLEM TO BE SOLVED: To prevent a metal cobalt particle or a cobalt compound particle added for improving conductivity from changing to a cobalt compound having low conductivity by adding nickel oxyhydroxide. SOLUTION: Cobalt particles or the above-mentioned cobalt compound particles are treated with antioxidants such as carboxylic acids such as citric acid, saccharides such as oxalic acid, formic acid and glucose, ascorbic acid and vitamins. The treatment is, for example, a method of dipping in an aqueous solution, The method is performed by adding these powders to the mixture. |