METHOD OF MANUFACTURING CATHODE ACTIVE MATERIAL PRECURSOR FOR LITHIUM SECONDARY BATTERY, METHOD OF MANUFACTURING CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, CATHODE INCLUDING CATHODE ACTIVE MATERIAL AND LITHIUM SECONDARY BATTERY

摘要

Provided are a method of manufacturing a cathode active material precursor for a lithium secondary battery, a method of manufacturing a cathode active material for a lithium secondary battery, a cathode including the cathode active material, and a lithium secondary battery including the cathode, wherein the method of manufacturing a cathode active material precursor for a lithium secondary battery comprises the steps of: preparing a mixed solution of a metal compound containing a nickel compound, a manganese compound and a cobalt compound; adding an acid-based complex-forming agent to the mixed solution of the metal compound to form a complex through a chelation reaction between a cation of the metal compound and an anion of the complex-forming agent; and substituting a hydroxyl ion (OH) for an anion of the complex to conduct a coprecipitation. According to the present invention, a cathode active material precursor for a lithium secondary battery, a cathode active material, a cathode and a lithium secondary battery can be manufactured in an environmentally-friendly manner.