| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide lithium manganate particle powder with excellent charge/ discharge cycle characteristics of a secondary battery as a positive electrode active material for a nonaqueous electrolyte secondary battery. <P>SOLUTION: The positive electrode active material for the nonaqueous electrolyte secondary battery consisting of lithium manganate particle powder with an average primary particle size of 3.0 to 20.0 μm, an average secondary particle size D<SB>50</SB>of 2.5 to 40.0 μm, and a ratio between the average primary particle size and the average secondary particle size of 0.5 to 1.2, is obtained by neutralizing a reaction solution containing manganese salt, ageing it, and put it under oxidation reaction to obtain manganese oxide particle powder, which is mixed with a lithium compound, and heating the mixture within a temperature range of 700 and 1,000°C. <P>COPYRIGHT: (C)2003,JPO |
