POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, ITS MANUFACTURING METHOD AND LITHIUM SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a positive electrode active material for a lithium secondary battery capable of forming a lithium secondary battery having high discharge capacity and excellent cycle performance, to provide its manufacturing method, and to provide the lithium secondary battery having high discharge capacity and excellent cycle performance. SOLUTION: This positive electrode active material for a lithium secondary battery contains a Li-Mn-Ni compound oxide and is characterized in that the total fine pore volume of the Li-Mn-Ni compound oxide is 0.0015 ml/g or more. This manufacturing method of the positive electrode active material for the lithium secondary battery containing the Li-Mn-Ni compound oxide is characterized by manufacturing the Li-Mn-Ni compound oxide through a precursor forming process for providing the Li-Mn-Ni compound oxide by atomizing and drying Li-Mn-Ni slurry and through a firing process for firing the Li-Mn-Ni compound oxide precursor.