POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

PROBLEM TO BE SOLVED: To provide: a positive electrode active material having a high capacity, with superior charge and discharge cycle characteristics, and capable of suppressing the occurrence of gas; a positive electrode using this; and a non-aqueous electrolyte secondary battery. SOLUTION: The positive electrode 21 has a positive electrode active material. The positive electrode active material has: lithium transition metal compound oxide particles containing lithium and a transition metal as a constituent element; and a covering layer provided at least on part of the surface of the lithium transition metal compound oxide particles. Manganese (Mn) is included at least in the covering layer, and in the absolute value of a radius vector structure function obtained by Fourier transforming an extensive X-ray absorption fine structure (EXAFS) multiplying cube of the cycle of a photoelectron at MnK absorption end, the ratio of a second proximity peak intensity near 5.2 to the first proximity peak intensity near 1.5 is 0.3 or more. COPYRIGHT: (C)2010,JPO&INPIT