Patent ID: 8287606

Claim:
A method of manufacturing a non-aqueous electrolyte secondary battery, comprising: subjecting a sodium-magnesium-containing oxide represented by the general formula Na c Mg b MO 2Â±Î± , where 0.65â‰¦câ‰¦0.75, 0<bâ‰¦0.3, 0â‰¦Î±â‰¦0.3, and M is at least one of manganese and cobalt, to ion-exchange of sodium for lithium by using a molten salt, an aqueous solution, or an organic solvent, to prepare a positive electrode active material; preparing a positive electrode active material slurry containing the positive electrode active material and a binder, and thereafter applying the positive electrode active material slurry to a positive electrode current collector, to prepare a positive electrode; interposing a separator between the positive electrode and a negative electrode to prepare a power-generating element; and encasing the power-generating element in a battery case, and filling an electrolyte solution in the battery case.