| abstract |
A positive electrode active material for a lithium secondary battery having low cost and high capacity is provided. The peak intensity represented by the general formula Li x FePO 4 (0.95 ≦ x ≦ 1.05) and present at 135-1365 cm −1 by Raman spectroscopy is defined as D, and 1560-1610 cm −1 . D / G is 0.5 or more and F / G is 1.5 or less, where G is the intensity of the existing peak and F is the intensity of the peak existing at 900 to 1200 cm −1. In the method for producing a positive electrode active material for a lithium secondary battery, represented by the above general formula, adding a tetraethylene glycol and a Li source to FePO 4 and performing firing A lithium secondary battery using the positive electrode active material for a lithium secondary battery, characterized in that the manufacturing method is characterized. [Selection] Figure 1 |