| abstract |
An object of the present invention is to provide a lithium secondary battery capable of improving, in particular, load characteristics, cycle characteristics, high-temperature storage characteristics, low-temperature characteristics, and safety when used as a positive electrode active material of a lithium secondary battery. To provide a method for producing a positive electrode active material. A method for producing a positive electrode active material for a lithium secondary battery according to the present invention is a method for producing a lithium-cobalt-based composite oxide containing an F atom, in which a lithium compound, a cobalt compound and a fluorine compound are mixed and then calcined. in, BET specific surface area using a 1 m 2 / g or more magnesium fluoride (MgF 2), a lithium compound, a cobalt compound and a magnesium fluoride (MgF 2) in a molar ratio to Co atoms, Li atom 0.90 1.10 A method for producing a positive electrode active material for a lithium secondary battery, comprising mixing at 0.001 to 0.15 F atoms and baking at a temperature of 800 to 1100 ° C. [Selection diagram] None |