| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a positive electrode active material for a nonaqueous electrolyte secondary battery made from lithium nickel cobaltate titanium composite oxide powder which is excellent in thermal stability and provides high charge/discharge capacitance, and to provide its manufacturing method suitable for industrial production and a nonaqueous electrolyte secondary battery of high capacitance and safety which uses the same. <P>SOLUTION: The manufacturing method includes following processes (I) and (II). (I) After the surface of nickel cobaltate composite hydroxide is coated with titanium compound or after it is further roasted at less than 700°C, it is mixed with lithium compound, and the resultant mixture is baked at 650-850°C in the oxygen atmosphere. (II) The resultant baked material is washed in water, filtered, and dried to provide the powder of lithium nickel cobaltate titanium composite oxide represented by the composition formula (1): Li<SB>1+z</SB>Ni<SB>1-x-y</SB>Co<SB>x</SB>Ti<SB>y</SB>O<SB>2</SB>(0.10≤x≤0.21, 0.04≤y<0.10, and -0.05≤z≤0.10). <P>COPYRIGHT: (C)2008,JPO&INPIT |
