LITHIUM SECONDARY BATTERY IMPROVED STORAGE CHARACTERISTIC AND METHOD FOR MANUFACTURING CATHODE ACTIVE MATERIAL COMPRISED THE SAME

摘要

The present invention relates to a lithium secondary battery which has lithium complex transition metal oxides as a positive electrode active material. The lithium complex transition metal oxides comprises nickel, manganese and cobalt as a transition metal; and has a stratiform crystal structure which includes a metal excluding the previously mentioned transition metal as a dopant. The present invention is relates to a manufacturing method of positive electrode active material which includes lithium complex transition metal oxides and a secondary battery in which the capacity holding ratio compare to primary capacity is more than 85% in the 50 cycle which has a condition of 0.5C charging and 1.0C discharging at 45°C. [Reference numerals] (AA) Comparative example 1;(BB) Example 1;(CC) Example 2