A positive electrode and a non-aqueous electrolyte secondary battery using the same for non-aqueous electrolyte secondary battery

The present invention comprises a lithium nickel-based composite oxide as a cathode active material, in a large capacity and a non-aqueous electrolyte secondary battery having a large area, to suppress the deterioration of the electrode due to the nonuniformity of the voltage in the electrode plane, the cycle to provide a means that can improve the properties. The value of the ratio of A cell area with respect to the rated capacity (the projected area of the cell including up battery outer body) is at 5 cm 2 / And positive electrode current collector, wherein formed on the surface of the positive electrode current collector, anda cathode active material layer containing a positive electrode active material comprising a lithium-nickel-based complex oxide and a spinel type lithium manganese composite oxide, The average of the lithium nickel based composite oxide secondary particle diameter (D50) D50 (A) [μm], and the content in the positive electrode active material layer and the A [wt%], the average of the spinel type lithium manganese composite oxide secondary particle diameter (D50) D50 (B) [μm], when the content in the positive electrode active material layer and the B [wt%], the following equation 1 and the following equation 2: [1] To satisfy the non-aqueous electrolyte secondary battery for the positive electrode.