RECYCLING METHOD OF OLIVINE-BASED CATHODE MATERIAL FOR LITHIUM SECONDARY BATTERY, CATHODE MATERIAL FABRICATED THEREFROM, AND CATHODE AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME

摘要

The present invention relates to a method for recycling LiFePO₄, which is an olivine-based cathode material for a lithium secondary battery. The present invention is characterized in that a cathode material including LiFePO₄ is synthesized using, as precursors, amorphous FePO₄.XH₂O and crystalline FePO₄.2H₂O (metastrengite) obtained by chemically treating LiFePO₄ as an olivine-based cathode material for a lithium secondary battery, which is produced from a waste battery. Since a cathode fabricated from the LiFePO₄ cathode material synthesized according to the present invention does not deteriorate the capacity, output characteristics, cycle efficiency and performance of the secondary battery and the cathode material of the lithium secondary battery may be recycled, the secondary battery is economically efficient.