LITHIUM COBALT OXIDE, PROCESS FOR PRODUCING SAME, POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY

摘要

The purpose of the present invention is to provide lithium cobalt oxide with which it is possible to heighten the capacity retention of a lithium secondary battery and heighten the capacity thereof. This lithium cobalt oxide is characterized by having an average particle diameter of 15-35 µm, an Li/Co molar ratio of 0.900-1.040, and a residual-alkali content of 0.05 mass% or less.