Positive electrode containing lithium nickel composite oxide for non-aqueous electrolyte secondary battery, non-aqueous electrolyte secondary battery using the same, and method for producing the same

摘要

A method for producing a positive electrode for non-aqueous electrolyte secondary battery of the present invention includes the steps of: (1) producing a positive electrode precursor by applying a positive electrode slurry including a positive electrode active material comprising a lithium-containing composite oxide including nickel, a binder, and a conductive agent on a positive electrode core material, the positive electrode active material including secondary particles having an average particle diameter of 8 μm or more, and then drying the positive electrode slurry to form a positive electrode material mixture layer; and (2) rolling while heating the positive electrode precursor to produce a positive electrode in which 3.5 g or more of the positive electrode active material is included per 1 cm3 of the positive electrode material mixture layer, and the positive electrode active material includes secondary particles having an average particle diameter of 5 μm or more.

主权项

1. A positive electrode for non-aqueous electrolyte secondary battery comprising: a positive electrode core material; and a positive electrode material mixture layer formed on a surface of said positive electrode core material,
wherein said positive electrode material mixture layer includes a positive electrode active material, a binder, and a conductive agent, said positive electrode active material includes a lithium-containing composite oxide including nickel, said lithium-containing composite oxide has a hexagonal crystal structure, and a content of said nickel accounts for 60 to 90% by mol of all metallic elements other than lithium, said lithium-containing composite oxide includes secondary particles having an average particle diameter of 5 μm or more, and 3.5 g or more of said positive electrode active material is included per 1 cm3 of said positive electrode material mixture layer.