POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY USING SAME

摘要

Provided are: a positive electrode active material for nonaqueous electrolyte secondary batteries, which has a good balance between high capacity and increase of output power; and a nonaqueous electrolyte secondary battery which uses this positive electrode active material for nonaqueous electrolyte secondary batteries. A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is a lithium-containing transition metal oxide having a layered structure and containing at least Ni as a transition metal. The ratio of elemental Ni relative to the total number of moles of metal elements other than lithium in the lithium-containing transition metal oxide is 89% by mole or more, and the lithium-containing transition metal oxide is configured so that a zirconium compound is present on the surface thereof.