POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, POSITIVE ELECTRODE AND SECONDARY BATTERY

摘要

Disclosed is a positive electrode active material for nonaqueous electrolyte secondary batteries, which enables to produce a battery having high-load characteristics with stable quality. This positive electrode active material for nonaqueous electrolyte secondary batteries also enables to produce a battery having high capacity. Also disclosed are a positive electrode for nonaqueous electrolyte secondary batteries and a nonaqueous electrolyte secondary battery. The positive electrode active material contains a secondary particle composed of a plurality of primary particles and/or a single crystal particle, and has an average number A represented by the formula (1) below of not less than 1 but not more than 10 and a specific surface area of not less than 0.20 m2/g but less than 0.50 m2/g. A = (m + p)/(m + s) (1) (In the formula, m represents the number of single crystal particles; p represents the number of primary particles constituting secondary particles; and s represents the number of secondary particles).