Spherical manganese carbonate, lithium manganese composite oxide and lithium ion secondary battery using them, and spherical metal carbonate and method for producing spherical manganese carbonate

摘要

A lithium ion secondary battery having excellent cycle characteristics and capable of maintaining a high capacity even after repeated charge and discharge, and manganese carbonate as a precursor of a lithium manganese composite oxide as a positive electrode active material of the lithium ion secondary battery and its It is an object to provide a manufacturing method. In order to solve the above problems, manganese carbonate used as a precursor of a lithium manganese composite oxide has an average particle size of 1.0 μm or more and 2 by a laser diffraction particle size distribution measuring apparatus of the manganese carbonate. Provided is a manganese carbonate having a diameter of less than 5 μm and a spherical shape, and a method for producing the same. Moreover, the lithium manganese composite oxide manufactured using this manganese carbonate and the lithium ion secondary battery which contains this lithium manganese composite oxide in a positive electrode active material are provided. [Selection] Figure 1