POSITIVE ELECTRODE ACTIVE MATERIAL, METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, NONAQUEOUS ELECTROLYTE POWER STORAGE ELEMENT, METHOD FOR MANUFACTURING NONAQUEOUS ELECTROLYTE POWER STORAGE ELEMENT, AND METHOD FOR USING NONAQUEOUS ELECTROLYTE POWER STORAGE ELEMENT

摘要

To provide: a positive electrode active material high in energy density and a method for producing the same; a positive electrode including the positive electrode active material and a nonaqueous electrolyte power storage element; and a method for manufacturing and using the nonaqueous electrolyte power storage element.SOLUTION: One embodiment of the present invention is a positive electrode active material for a nonaqueous electrolyte power storage element. The positive electrode active material contains an oxide including lithium, chromium and an element A, the element A being a Group 4 element, a Group 5 element, a Group 13 element, a Group 14 element, a Group 15 element, a Group 16 element other than oxygen, or a combination thereof. In an X-ray diffraction pattern of the oxide, a ratio (Is/Ib) of an intensity Ia of a peak appearing in a range where 2θ is 13-23° to an intensity Ib of a peak appearing in a range where 2θ is 39-49° is 0.7 or less.SELECTED DRAWING: Figure 3