| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a positive electrode active material excelling in charge-discharge cycle durability, low in the amount of free alkali and having high discharge capacity, high filling property and high volume capacity density. <P>SOLUTION: The method for manufacturing the positive electrode active material includes carrying out water contact treatment of a lithium composite oxide expressed by general formula: Li<SB>a</SB>Ni<SB>b</SB>Co<SB>c</SB>Mn<SB>d</SB>M<SB>e</SB>O<SB>2</SB>(a element M is at least one kind of element selected from a group consisting of transition metal elements other than Ni, Co and Mn, and Al and group 2 elements, and a, b, c, d and e are 0.9≤a≤1.2, 0≤b≤1, 0≤c≤1, 0≤d<1, 0≤e≤0.3, a+b+c+d+e=2), then separating treatment water from the lithium composite oxide, bringing the lithium composite oxide separated from the treatment water, into contact with a solution of a compound of a group 3 element or a group 4 element to stick 0.02-0.9 mol% of the group 3 element or group 4 element to the lithium composite oxide, and then heating it at 600-1,000°C. <P>COPYRIGHT: (C)2011,JPO&INPIT |
