| abstract |
Disclosed is a positive electrode active material for lithium secondary batteries, which contains Al atoms, and is characterised by containing a-LiAlO2 and a lithium complex oxide which is represented by general formula (1) LixNi1-y-zCoyMnzO2 (where x represents 0.98?x?1.20, y represents 0<y?0.5 and z represents 0<z?0.5, and y+z<1). Further disclosed are: the positive electrode active material for a lithium secondary battery, which contains a lithium nickel cobalt manganese complex oxide and is able to provide a lithium secondary battery with exceptional cycling properties; a method wherein said positive electrode active material is produced through an industrially advantageous process; and a lithium secondary battery that contains the positive electrode active material and that has particularly excellent cycling properties. |