Positive electrode active material for non-aqueous electrolyte secondary battery and method for producing the same, and non-aqueous electrolyte secondary battery using positive electrode active material

摘要

An object of the present invention is to provide a positive electrode active material for a non-aqueous electrolyte secondary battery, which can solve the problem that the capacity remarkably decreases with an increase of the number of charging and discharging cycles in a high capacity non-aqueous electrolyte secondary battery using a positive electrode active material for a non-aqueous electrolyte secondary battery made of particles of an alkali metal composite oxide containing nickel. A positive electrode active material for a non-aqueous electrolyte secondary battery, comprising a nickel-alkali metal-containing composite oxide having cracks on the surface of primary particles is used.