FABRICATION METHOD OF LIFEPO4, ACTIVE MATERIAL FABRICATED BY THE METHOD, MANUFACTURING METHOD OF LITHIUM ION SECONDARY BATTERY AND LITHIUM ION SECONDARY BATTERY HAVING THE ACTIVE MATERIAL

摘要

The present invention relates to a method of preparing a lithium iron phosphate active material by using a relatively inexpensive starting material, the method including the following steps: synthesizing FePO_4 with a starting material of Fe(NO_3)_3; and ball milling the FePO_4 with a lithium source material to synthesize LiFePO_4. The present invention has an effect of reducing manufacturing costs of a cathode active material of LiFePO_4 by using a relatively inexpensive starting material of Fe(NO_3)_3. In addition, the present invention synthesizing FePO_4 by using a starting material of Fe(NO_3)_3 and then preparing LiFePO_4 by using FePO_4, thus having an effect of providing an active material with an excellent electrochemical property.