METHOD OF FORMING CATHODE ACTIVE MATERIAL POWDER FOR LITHIUM SECONDARY CELL AND THE POWDER FORMED THEREBY

摘要

PURPOSE: A manufacturing method of positive electrode active material powder, and the positive electrode active material powder manufactured therefrom are provided to form a coating film with a uniform thickness, and to prevent a leakage of manganese. CONSTITUTION: A manufacturing method of positive electrode active material powder comprises the following steps: melting a water-soluble polymer(12) to water; coating the water soluble polymer on the surface of a positive electrode active material particle(10) by adding the positive electrode active material particle to the water and stirring; adsorbing metal ions to the surface of the coated positive electrode active material particle; filtering and drying the positive electrode active material powder; and sintering the powder for forming a coating film(16).