| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing a positive electrode active material for a lithium secondary battery having a wide usable voltage range, a high charge/discharge cycle durability, high capacity, and high safety, by a simple and easy process using an easily obtainable lithium source. <P>SOLUTION: An R-3m rhombohedral-structured lithium-nickel-cobalt-manganese-aluminum-containing complex oxide having a composition represented by a general formula: Li<SB>p</SB>Ni<SB>x</SB>Mn<SB>1-x-y-z</SB>Co<SB>y</SB>Al<SB>z</SB>O<SB>2-q</SB>F<SB>q</SB>(wherein 0.98≤p≤1.07, 0.3≤x≤0.5, 0.1≤y≤0.38, 0<z≤0.05, and 0≤q≤0.05) is produced by dry mixing agglomerated nickel-cobalt-manganese complex oxyhydroxide particles, lithium carbonate, and aluminum compound particles and firing the resultant mixture in an oxygen-containing atmosphere. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
