NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR MANUFACTURING SAME, NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY COMPRISING SAME, AND LITHIUM SECONDARY BATTERY

摘要

The present invention relates to a negative electrode active material for a lithium secondary battery, a method for manufacturing the same, and a lithium secondary battery comprising the same. The negative electrode active material comprises: a core containing a lithium titanium oxide of chemical formula 1 below; and a coating layer which is located on a surface of the core and contains fluorine, and thus the amount of moisture in the active material is reduced; there is no risk of occurrence of side reactions by moisture due to the deteriorated adsorption of external moisture; and the loss of an SEI layer can be prevented by a stable fluorine-containing coating film formed on a surface of the active material. As a result, the performance of the battery can be improved and stably expressed. [Chemical formula 1] LixTiyO4, wherein x and y are as defined in the specification.