| 摘要 |
<p>A lithium-transition metal composite oxide which is represented by LixM1-yNyO2, wherein M is a transition metal element, N is a transition metal element other than M or an alkaline earth metal, 0.2 ≤ x ≤ 1.2, and 0 = y = 0.7, has gradients in a cumulative volume particle size distribution curve at cumulative volume percentages of 20 % and 80 % of 9 % / νm or less and 3 % / νm or more, respectively, and has an average particle diameter of 3 to 20 νm. The lithium-transition metal composite oxide can be suitably used as a positive electrode active material of a lithium secondary cell which has a great volume capacity density, is high in safety, and is excellent in the homogeneous applicability of an electrolyte coating, in the durability of charge-discharge cycle and in low temperature characteristics.</p> |
