METHOD FOR PREPARING AN ELECTRODE ACTIVE MATERIAL FOR IMPROVING THE PROPERTIES OF A BATTERY, AND LITHIUM SECONDARY BATTERY INCLUDING THE ELECTRODE ACTIVE MATERIAL PREPARED THEREBY

摘要

The present invention relates to a method for preparing an electrode active material for manufacturing a lithium secondary battery having stable charging/discharging efficiency and life-cycle characteristics even when the battery is charged or discharged at high speed. More particularly, the present invention relates to a method for controlling both a composition ratio (Ti/Li) of surface elements and a composition of a lithium element in a lithium titanium oxide which is known to be an electrode active material having a relatively stable structure. The lithium secondary battery using the titanium oxide manufactured according to the present invention exhibits the advantage of maintaining charging/discharging efficiency and charging capacity even when charged or discharged at high speed, thereby enabling stable use.