| abstract |
(57) [Problem] To provide a positive electrode active material capable of improving discharge load characteristics of a nonaqueous electrolyte battery. SOLUTION: It can belong to a space group R-3m, and (104) The half value width of the X-ray diffraction peak corresponding to the surface is 0.06 to 0.5. The lithium-containing metal composite oxide particles within a range of 15 ° and having an average value of the shape factor SF1 calculated by the following equation (1) of greater than 1 and less than or equal to 3.33 are included. Characteristic positive electrode active material. SF1 = P 1 / P 2 (1) where P 2 is the area of a two-dimensional image of the lithium-containing metal composite oxide particles, and P 1 is the maximum length of the two-dimensional image as a diameter. The area of the circle. |