COMPOSITE COMPOUND, LITHIUM-CONTAINING COMPOSITE OXIDE, AND METHODS RESPECTIVELY FOR PRODUCING SAID PRODUCTS

摘要

Provided are: a composite compound which is useful as a precursor of a lithium-containing composite oxide that can achieve a high electrode density even when the pressing pressure applied during production is low, has an excellent electrical discharge capacity per unit area and excellent rate properties and also has extremely superior cycle properties; and others. A composite compound which contains nickel and manganese, and has a ratio of the diameter of 90% cumulative volume (D90) to the diameter of 10% cumulative volume (D10) (i.e., D90/D10) of 2.00 or less in a laser scattering particle size distribution measurement, a tap density of 1.9 g/cm3 or more and an average circularity degree of 0.960 or more.