POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND USE THEREOF

摘要

A positive electrode active material provided in the present invention is characterized in that it is substantially formed of a lithium nickel cobalt manganese composite oxide and that a molar content ratio (Ni III /Ni II ) of bivalent nickel atoms (Ni II ) and trivalent nickel atoms (Ni III ) of nickel atoms constituting the composite oxide is 0.15 ‰¤ (Ni III /Ni II ) ‰¤ 0.95.