| 摘要 |
A production method for a positive electrode for a nonaqueous electrolyte secondary battery that includes a positive electrode active material capable of intercalating and deintercalating a lithium ion, a conductive agent and a binder, in which the positive electrode active material is produced by coating cobalt-based lithium composite oxide represented by a general formula: LiaCO1-sM1sO2 with lithium nickel cobalt manganese oxide of general formula: LibNitCOuMnvO2, ratio r1/r2 of the average particle diameter r1 of the cobalt-based lithium composite oxide and the average particle diameter r2 of the lithium nickel cobalt manganese oxide being 2≦̸r1/r2≦̸50, and the average particle diameter r2 of the lithium nickel cobalt manganese oxide is 0.5 μm≦̸r2≦̸20 μm. A positive electrode produced by such method results in a nonaqueous electrolyte secondary battery having enhanced energy density and capacity and retention characteristic when charging/discharging is repeated at a high potential of 4.5 V based on lithium.
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