POSITIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Abstract

A positive electrode active material 32 according to an example of an embodiment of the present invention contains first composite oxides 33 and second composite oxides 34. The first composite oxides 33 are secondary particles each formed by aggregation of primary particles having an average particle diameter of less than or equal to 0.3 μm, and the second composite oxides 34 includes primary particles of greater than or equal to 0.5 μm. D50a of the first composite oxides 33 is larger than D50b of the second composite oxides 34. The ratio of the mean cross-section area (Sb) of the second composite oxides 34 with respect to the mean cross-section area (Sa) of the primary particles 35 constituting the first composite oxides 33 satisfies the condition 80≤(Sb/Sa)≤600.

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