| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for positive electrode material to realize a lithium battery of a large discharge capacity. SOLUTION: This substance is double oxide expressed by a composition formula of LiXNi1- YMYOZ (0<=X<=1.1, 0<=Y<=0.5, 1.8<=Z<=2.2, M is an element of a transition metal, IIIB group, IVB group, or VB group). In a manufacturing method for this substance, lithium compound, nickel compound, and compound of the element M are mixed to provide an atomic ratio of Li/(Ni+M)>1, and after heat treatment to this mix, lithium compound other than LiXNi1- YMYOZ is cleaned to be eliminated by use of water or solution in which lithium compound is dissolved, where total lithium ion concentration in cleaning liquid is 0.01mol/liter or more, with the cleaning liquid set in such a way that lithium compound other than LiXNi1- YMYOZ in the cleaning liquid is completely dissolved without saturating at a cleaning temperature. |
