| 摘要 |
A lithium-manganese composite oxide for a lithium ion battery having a good cycle property at high-temperature and battery property of high capacity is provided. A spinel type lithium-manganese composite oxide for a lithium ion battery represented by a general formula: Li 1+x Mn 2-y M y O 4 (wherein M is one or more elements selected from Al, Mg, Si, Ca, Ti, Cu, Ba, W and Pb, and, -0.1 ‰¤ x ‰¤ 0.2, and 0.06 ‰¤ y ‰¤ 0.3), and when D10, D50 and D90 are defined as a particle size at which point the cumulative frequency of volume reaches 10%, 50% and 90% respectively, d10 is not less than 2 µm and not more than 5 µm, d50 is not less than 6 µm and not more than 9 µm, and d90 is not less than 12 µm and not more than 15 µm, and BET specific surface area thereof is greater than 1.0 m 2 /g and not more than 2.0 m 2 /g, and the tap density thereof is not less than 0.5 g/cm 3 and less than 1.0 g/cm 3 . |
