ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERY AND METHOD FOR PREPARING THE SAME

摘要

The present invention is related to a secondary battery comprising: (a) primary granules of a metalloid oxide alloyable with lithium; and (b) secondary granules of an oxide containing the same metalloid as that of (a) as well as lithium, and to a secondary battery including such an electrode active material.  When the electrode active material according to the present invention is used as an anode active material, reduced amounts of an irreversible phase such as a lithium oxide or a lithium metal oxide are produced during an initial charge-discharge of a battery since lithium is already contained in the secondary granules before the initial charge-discharge of a battery, and thus a dead volume on the side of a cathode can be minimized and a high-capacity battery can be fabricated.