ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERIES AND PROCESS FOR PRODUCTION THEREOF

摘要

An active material for non-aqueous electrolyte secondary batteries which contains nickel, manganese, and a lithium-containing transition metal oxide having a close-packed structure of oxygen, wherein the lithium-containing transition metal oxide has an MLi/MT atomic ratio higher than 1.0 (wherein MLi is lithium content of the transition metal oxide by mole and MT is transition metal content thereof by mole) and a hexagonal crystal structure and wherein the X-ray diffraction pattern of the crystal structure has a peak P003 assignable to (003) plane and a peak P104 assignable to (104) plane and the P003/P104 integrated intensity ratio (I003/I104) varies reversibly dependent on the occlusion and emission of lithium by the transition metal oxide within the range of 0.7 to 1.5 linearly and continuously.