| 摘要 |
<p>A positive electrode active material, characterized in that it comprises crystal grains of an oxide represented by the formula (1): LiNi2/3Mn1/3O2 which has a layered crystal structure, wherein the arrangement of oxygen atoms constituting the oxide is a cubic close-packed structure. The positive electrode active material allows the preparation of a non-aqueous electrolyte secondary cell which is reduced in the precipitation of Li and the elevation of the surface temperature of the cell.</p> |
