| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a positive electrode active material by which a non-aqueous type electrolyte secondary battery can be implemented, which has two characteristics of exhibiting high thermal stability and safety compatible, and has a high charge and discharge capacity. <P>SOLUTION: A method for manufacturing the positive electrode active material includes the steps of mixing a lithium metal composite oxide powder with cold water, to obtain a slurry; adding a water solution containing nickel salt while stirring the slurry at a pH of 9.0, thereby adhering a nickel compound particle; and performing heat treatment at 300 to 700 degrees centigrade, thereby converting the nickel compound into lithium nickel-based composite oxide. The lithium metal composite oxide is expressed as general Formula Li<SB>z</SB>Ni<SB>1-x-y</SB>Co<SB>x</SB>M<SB>y</SB>O<SB>2</SB>(where, M is at least one element chosen from among Mn, V, Mg, Mo, Nb, Ti, and Al; 0.10≤x≤0.21; 0≤y≤0.08; 0.97≤z≤1.10). The number of Ni atoms lies between 0.5 and 1.5% of the total number of atoms of Ni, Co, and M which are contained in the lithium metal composite oxide powder. <P>COPYRIGHT: (C)2008,JPO&INPIT |
