MANUFACTURING METHOD OF CATHODE ACTIVE MATERIAL, AND CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY MANUFACTURED THEREBY

摘要

The present invention relates to a method for manufacturing a positive electrode active material including a step of dry-mixing the lithium transition metal oxide and a boron-containing compound, thermally treating the mixture, and coating a surface of a lithium transition metal oxide with a boron lithium oxide, and to the positive electrode active material manufactured thereby. In the method for manufacturing the positive electrode active material according to an embodiment of the present invention, lithium impurities in the lithium transition metal oxide can be converted easily into boron lithium oxide having a stable structure by means of a heat-treatment at close to the melting point of the boron-containing compound. Moreover, a coating layer involving even coating of the boron lithium oxide can be formed in an amount proportional to the amount of the used boron-containing compound even at low heat-treating temperatures.