Method for manufacturing lithium secondary battery, lithium secondary battery, and lithium secondary battery system

摘要: To provide a method for manufacturing a lithium secondary battery, characterized by having: a processing lithium sec ondary battery preparing step for preparing a processing lithium secondary battery that has a positive electrode layer containing LiFePO as a positive-electrode active material, a negative electrode layer containing a carbon material as a negative-electrode active material, and nonaqueous electro lyte solution containing LiPF and LiBOB; and a film form ing step of performing a charging process on the processing lithium secondary battery until a Voltage of the processing lithium secondary battery falls within a high Voltage range in which a film of an oxidative decomposition product of a BOB anion contained in the LiBOB is formed on a surface of the positive-electrode active material.