| 摘要 |
PROBLEM TO BE SOLVED: To provide a high performance active material by passing a lithium salt solution through a compound selected from a group composed of nickel oxyhydroxide, nickel oxyhydroxide containing one or more kinds of metallic elements other than nickel and a mixture of nickel oxyhydroxide and nickel oxyhyroxide containing one or more kinds of metallic elements other than nickel. SOLUTION: A lithium hydroxide aqueous solution is used, and nickel oxyhydroxide containing at least one kind of cobalt or aluminum is desirably used. Nickel oxyhydroxide powder is filled in a reactor, and the lithium hydroxide aqueous solution as a moving phase is passed into the reactor to a moving phase discharge port 3 from a moving phase introducing port 2. After performing this liquid passing process, for example for six hours, water is passed for three minutes for washing, and reactant powder is taken out and dried to obtain a positive electrode active material. This active material easily diffuses ions and is homogeneous in a discharge characteristic, so that a cycle service life characteristic can be improved. |
