LITHIUM TRANSITION-METAL COMPOUND POWDER, ITS MANUFACTURING METHOD, SPRAY DRYING OBJECT ACQUIRED DURING SPRAY DRYING PROCESS, POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY USING IT, AND LITHIUM SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a lithium transition-metal compound powder for the positive electrode of a lithium secondary battery capable of both improving load characteristics such as a rate/output characteristic and materializing a high density.

SOLUTION: The lithium transition-metal compound powder for the positive electrode of the lithium secondary battery is formed of the lithium transition-metal compound having a function capable of absorption/desorption of a lithium ion as a main component. A material is prepared by calcining a fine and even mixture of the main component and an additive to suppress a particle growth and sintering during calcination. The spherical secondary particle is formed by massing together a primary particle with an average diameter of 0.05 to 0.9 μm. A ratio A/B between a median diameter A in the secondary particle and an average diameter B in the primary particle lies within a range in 8 to 100.

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